Orthopaedic Technologist Certified (OTC) Examination — Questions and Answers

Question 1: Which of the 'five P's' of compartment syndrome represents the LATEST and most ominous sign?

Pressure
Pain
Paresthesia
Pulselessness (Correct answer)

Correct answer: Pulselessness

Pulselessness is a very late sign indicating arterial occlusion; by this stage irreversible muscle and nerve necrosis is likely already occurring.

Question 2: When caring for a fresh plaster cast, which instruction is MOST important to give the patient?

Apply a heating pad to speed up the drying process
Ambulate immediately to prevent stiffness
Keep the cast dry and elevate the extremity (Correct answer)
Apply ice directly over the cast to reduce swelling

Correct answer: Keep the cast dry and elevate the extremity

Keeping the cast dry prevents plaster breakdown and skin maceration, while elevation reduces swelling and associated neurovascular complications.

Question 3: Which layer of the skin, composed of dead keratinized cells, acts as the outermost protective barrier and must be protected during cast application?

Stratum spinosum
Stratum basale
Stratum corneum (Correct answer)
Stratum granulosum

Correct answer: Stratum corneum

The stratum corneum is the outermost, waterproof layer of the epidermis made of dead keratinized cells that protect deeper tissues.

Question 4: Which bony prominences must receive extra padding during a long-leg cast application to prevent pressure sores?

Calcaneus and lateral malleolus
All of the above (Correct answer)
Fibular head and Achilles tendon
Tibial tuberosity and medial malleolus

Correct answer: All of the above

All listed prominences—fibular head, Achilles, tibial tuberosity, malleoli, and calcaneus—are bony pressure points requiring additional padding in a long-leg cast.

Question 5: Which of the following is the MOST reliable early indicator of compartment syndrome in a casted extremity?

Pitting edema distal to the cast
Skin discoloration visible above the cast
Pain out of proportion to the injury, especially with passive stretch of muscles in the compartment (Correct answer)
Cast warmth on external palpation

Correct answer: Pain out of proportion to the injury, especially with passive stretch of muscles in the compartment

Pain disproportionate to the injury and worsened by passive muscle stretch is the earliest and most reliable sign of compartment syndrome.

Question 6: An error in a medical record should be corrected by:

Using correction fluid (white-out) to cover the mistake
Drawing a single line through the error, writing the correction, and initialing with date and time (Correct answer)
Deleting the entry in the electronic record without notation
Rewriting the entire note on a new page

Correct answer: Drawing a single line through the error, writing the correction, and initialing with date and time

Medical record corrections must be traceable; a single strikethrough with a dated, initialed correction preserves the original entry and the correction.

Question 7: Waterproof casting liner systems (e.g., Gore-Tex liner) allow patients to:

Replace standard stockinette entirely in all cases
Swim competitively without any cast degradation
Shower and submerge the cast without damaging the padding (Correct answer)
Remove the liner at home for drying

Correct answer: Shower and submerge the cast without damaging the padding

Waterproof liner systems allow the inner cast to get wet and dry without holding moisture, enabling showering and light water exposure.

Question 8: A patient with a forearm cast develops skin maceration and a rash following exposure to water. The best management is:

Reinforce the cast with fiberglass tape to limit future moisture entry
Apply antifungal powder through the cast opening
Remove the cast, treat the skin, and reapply with waterproof liner if appropriate (Correct answer)
Allow the cast to air-dry and apply talcum powder at the proximal edge

Correct answer: Remove the cast, treat the skin, and reapply with waterproof liner if appropriate

Wet skin under a cast leads to maceration and fungal infection requiring cast removal, skin treatment, and reassessment of cast material choice.

Question 9: When is informed consent for cast application typically obtained?

After the cast is applied and the patient is comfortable
Only if the patient specifically requests it
By the casting technician immediately before applying the first layer
Before the procedure begins, after explaining risks, benefits, and alternatives (Correct answer)

Correct answer: Before the procedure begins, after explaining risks, benefits, and alternatives

Informed consent must be obtained before the procedure, giving the patient opportunity to ask questions and decline if desired.

Question 10: For obese patients requiring lower extremity casting, which casting consideration is most important?

Limiting padding to reduce cast bulk
Using stronger fiberglass layers and ensuring adequate support to prevent cast breakage (Correct answer)
Using plaster only due to its lower cost for larger casts
Applying the cast in a standing position

Correct answer: Using stronger fiberglass layers and ensuring adequate support to prevent cast breakage

Increased body weight places greater mechanical stress on the cast; additional fiberglass layers and structural support prevent early cast failure.

Question 11: Which layer is applied FIRST when constructing a traditional cast?

Fiberglass or plaster tape
Cast padding (Webril or equivalent)
Elastic bandage (ACE wrap)
Stockinette (Correct answer)

Correct answer: Stockinette

Stockinette is applied first directly over the skin, followed by cast padding, and then the casting material (plaster or fiberglass).

Question 12: After cast removal, which skin finding requires the clinician's evaluation before the patient is discharged?

Muscle atrophy visible in the limb
Slight pallor of the skin
Open pressure sore or wound (Correct answer)
Mild skin dryness and scaling

Correct answer: Open pressure sore or wound

Any open wound or pressure injury discovered post-removal must be assessed by the clinician for infection and wound care planning.

Question 13: A casting technician notices a colleague re-using stockinette that was removed from a patient and trimmed. The correct response is to:

Address the issue with the colleague and report it per facility policy (Correct answer)
Use the same practice if the supervising technician approves
Ignore it since stockinette is a low-risk material
Document the incident but take no further action

Correct answer: Address the issue with the colleague and report it per facility policy

Re-using single-use patient care items is an infection control violation that must be addressed and reported according to facility policy.

Question 14: Which complication is most directly prevented by prompt bivalving of a tight cast?

Acute compartment syndrome (Correct answer)
Wound dehiscence
Bone non-union
Skin maceration

Correct answer: Acute compartment syndrome

Bivalving relieves circumferential pressure that, if left unaddressed, can progress to compartment syndrome and ischemia.

Question 15: Which of the following best describes 'bivalving' a cast?

Splitting only the padding and stockinette without cutting the cast shell
Adding a second layer of fiberglass over the primary cast
Removing the cast entirely with a saw
Cutting the cast longitudinally on two sides to create two halves (Correct answer)

Correct answer: Cutting the cast longitudinally on two sides to create two halves

Bivalving involves making two longitudinal cuts on opposite sides of the cast, converting it into two clamshell-like halves to relieve pressure.

Question 16: Which fracture pattern describes a bone that bends but does not completely break, seen primarily in children?

Stress fracture
Comminuted fracture
Greenstick fracture (Correct answer)
Spiral fracture

Correct answer: Greenstick fracture

Greenstick fractures occur in pediatric patients whose immature, flexible bone bends and fractures on one cortex while the other remains intact.

Question 17: A 'three-point pressure system' in cast molding refers to which concept?

Applying plaster in three separate dipping sessions
Applying three different types of padding materials
Three sequential wrapping passes around the limb
Using counter-pressure at three points to hold a fracture in reduction (Correct answer)

Correct answer: Using counter-pressure at three points to hold a fracture in reduction

Three-point molding applies a corrective force at the fracture apex balanced by opposing forces proximal and distal, maintaining fracture reduction within the cast.

Question 18: How frequently should neurovascular checks be performed during the first 24 hours after application of a new cast?

Every 1–2 hours (Correct answer)
Every 30 minutes
Every 4–6 hours
Once per nursing shift

Correct answer: Every 1–2 hours

Neurovascular checks every 1–2 hours during the first 24 hours are the standard of care to detect early signs of vascular compromise or compartment syndrome.

Question 19: Which casting material generally has the HIGHEST tensile strength per unit weight?

Cotton-based orthopedic padding
Standard plaster of Paris
Thermoplastic splint material
Fiberglass (polyurethane-impregnated glass fiber) (Correct answer)

Correct answer: Fiberglass (polyurethane-impregnated glass fiber)

Fiberglass casting tape provides superior tensile strength at a lighter weight compared to plaster, which is why it requires fewer layers for equivalent support.

Question 20: A patient reports a burning sensation under the cast just before scheduled removal. The correct response is:

Apply ice over the cast surface
Administer oral pain medication and wait
Remove the cast immediately and assess the skin (Correct answer)
Tell the patient to tolerate it until the next appointment

Correct answer: Remove the cast immediately and assess the skin

Burning under a cast suggests pressure necrosis or skin breakdown; prompt removal and assessment is required.

Question 21: A pediatric patient's parent asks a casting technician to explain the risks of the casting procedure. The technician's best response is to:

Explain the procedure within their scope of practice and refer clinical risk questions to the physician (Correct answer)
Refer all questions exclusively to the physician before proceeding
Decline to answer questions and hand the parent a printed brochure
Provide a detailed medical risk assessment to reassure the parent

Correct answer: Explain the procedure within their scope of practice and refer clinical risk questions to the physician

Technicians can explain the procedure within their scope but must defer clinical risk and informed consent questions to the supervising physician.

Question 22: What is the recommended number of layers of stockinette that should extend beyond each end of a standard cast?

Stockinette is folded back 10–15 cm for maximum padding
2–5 cm of stockinette folded back over the cast edges (Correct answer)
No stockinette extension is used
1 layer folded back 1–2 cm

Correct answer: 2–5 cm of stockinette folded back over the cast edges

Approximately 2–5 cm of stockinette is folded back over the cast edges and incorporated to create a smooth, padded border that prevents skin irritation.

Question 23: The 'three-point mold' technique is especially important in pediatric casting because:

Children require casts to be removed more frequently
Pediatric casts use faster-setting plaster
Children cannot tolerate fiberglass materials
Children have softer bones that may angulate if the cast is not properly molded (Correct answer)

Correct answer: Children have softer bones that may angulate if the cast is not properly molded

Proper three-point molding maintains fracture alignment in children whose immature bone remodeling relies heavily on correct cast geometry.

Question 24: For a pediatric patient with an upper extremity fracture, what thumb position is standard in a thumb spica cast?

Thumb flexed completely into the palm
Thumb fully extended in line with the forearm
Thumb in palmar abduction and slight opposition, as if holding a glass (Correct answer)
Thumb fully adducted against the palm

Correct answer: Thumb in palmar abduction and slight opposition, as if holding a glass

The functional thumb position mimics a gentle grasp, preventing contracture while immobilizing the first ray structures.

Question 25: When caring for a patient with dementia in a cast, which instruction to caregivers is MOST critical?

Lock all cutting instruments to prevent cast removal
Monitor for signs of cast removal attempts and skin breakdown daily (Correct answer)
Sedate the patient if they attempt to touch the cast
Apply additional restraints to prevent the patient from moving

Correct answer: Monitor for signs of cast removal attempts and skin breakdown daily

Dementia patients may attempt cast removal and cannot communicate discomfort reliably; daily visual inspection and behavioral monitoring are essential.

Question 26: A patient with a newly applied short leg walking cast is instructed not to bear weight for 48 hours primarily because:

Insurance protocols require a 48-hour non-weight-bearing period
Walking activates muscles that cause pain during the acute phase
Fiberglass requires 48 hours to achieve full strength
Plaster needs adequate time to dry and reach full structural hardness before load-bearing stress (Correct answer)

Correct answer: Plaster needs adequate time to dry and reach full structural hardness before load-bearing stress

Plaster casts require 24–48 hours to fully cure and develop maximum strength; early weight-bearing can indent or crack the cast.

Question 27: Which professional behavior is consistent with maintaining ethical standards in orthopedic casting practice?

Refusing to perform a procedure you are not trained for and escalating to qualified staff (Correct answer)
Agreeing to falsify documentation to expedite a patient's insurance claim
Performing a cast application outside your competency level when no one else is available
Sharing patient clinical photos on social media to educate colleagues

Correct answer: Refusing to perform a procedure you are not trained for and escalating to qualified staff

Ethical practice requires practitioners to recognize and stay within their competency boundaries, escalating to qualified personnel when needed.

Question 28: In pediatric casting, 'fracture remodeling' potential influences cast selection primarily because:

Acceptable angular deformity tolerances are greater in younger children with open growth plates (Correct answer)
Pediatric fiberglass casts must be changed every 2 weeks
Plaster is contraindicated in all patients under 12 years old
Children require more cast layers due to higher activity levels

Correct answer: Acceptable angular deformity tolerances are greater in younger children with open growth plates

Children with open growth plates can remodel significant angular deformity over time, so clinicians may accept greater initial angulation and choose less rigid casting approaches.

Question 29: Which of the following environmental surfaces in a casting room is considered a 'high-touch' surface requiring more frequent disinfection?

Ceiling tiles
Base of the examination table
Cast saw handles and switches (Correct answer)
Window ledges

Correct answer: Cast saw handles and switches

Cast saw handles and switches are touched repeatedly by staff during procedures and are classified as high-touch surfaces requiring frequent disinfection.

Question 30: A patient presents with foul odor and purulent drainage seeping through a 10-day-old cast. The priority intervention is:

Apply topical antibiotic cream around the cast edges
Irrigate through the cast with saline
Reinforce the cast and prescribe oral antibiotics empirically
Remove the cast and assess for wound infection or skin breakdown (Correct answer)

Correct answer: Remove the cast and assess for wound infection or skin breakdown

Purulent drainage and odor indicate infection or skin breakdown requiring immediate cast removal and wound assessment.

Question 31: Which technique reduces pressure necrosis risk at bony prominences during cast application?

Placing felt or foam padding over prominences before casting (Correct answer)
Wetting the cast material before molding over prominences
Using extra-tight bandaging to prevent migration
Applying the cast without padding to improve fit

Correct answer: Placing felt or foam padding over prominences before casting

Felt or foam padding over bony prominences distributes pressure and prevents focal necrosis beneath the cast.

Question 32: What is the primary advantage of fiberglass casting material over plaster?

It is cheaper than plaster
It sets slower
It is more flexible
It is lighter and water-resistant (Correct answer)

Correct answer: It is lighter and water-resistant

Fiberglass casting material offers several advantages over plaster, most notably being significantly lighter and water-resistant. Its lighter weight enhances patient comfort and mobility, while its water-resistant property allows patients to shower or bathe with proper precautions, improving hygiene and quality of life during immobilization. These features contribute to better patient compliance and overall experience.

Question 33: A patient reports numbness and tingling in the fingers before cast application. This finding should be:

Ignored as it is a normal response to injury
Resolved by elevating the arm for 2 minutes
Treated by applying the cast quickly to provide stability
Documented and reported to the supervising clinician before proceeding (Correct answer)

Correct answer: Documented and reported to the supervising clinician before proceeding

Pre-existing neurological symptoms must be documented and reviewed by the clinician to distinguish pre-cast from post-cast nerve involvement.

Question 34: A teenage athlete asks when they can return to sport after cast removal. The technician's correct response is:

After one week of normal activity without pain
As soon as range of motion is fully restored
That decision belongs to the treating clinician and physical therapist, not the casting technician (Correct answer)
Immediately, because the fracture has healed by the time the cast is removed

Correct answer: That decision belongs to the treating clinician and physical therapist, not the casting technician

Return-to-sport decisions involve fracture healing assessment, functional testing, and clinical judgment that are outside the casting technician's scope.

Question 35: Which cast saw blade type is recommended for cutting fiberglass casts?

Standard plaster blade with wide teeth
Fine-toothed oscillating blade designed for synthetic materials (Correct answer)
Serrated hacksaw blade
Diamond-tip rotary blade

Correct answer: Fine-toothed oscillating blade designed for synthetic materials

Fine-toothed blades designed for synthetic casting materials cut fiberglass efficiently while minimizing heat generation.

Question 36: Which preparatory step reduces skin irritation under the cast?

Shaving the extremity with a razor blade
Applying petroleum jelly directly to the skin
Applying stockinette smoothly without wrinkles (Correct answer)
Wetting the skin before padding

Correct answer: Applying stockinette smoothly without wrinkles

A wrinkle-free stockinette prevents pressure points that can cause skin breakdown under the cast.

Question 37: What is the primary advantage of using a waterproof cast liner (e.g., Gore-Tex liner) under a fiberglass cast?

It increases the structural strength of the cast
It reduces the exothermic heat during curing
It allows the patient to bathe or swim without cast damage (Correct answer)
It eliminates the need for stockinette

Correct answer: It allows the patient to bathe or swim without cast damage

Waterproof cast liners allow water to pass through and dry quickly, enabling patients to bathe, shower, or swim without damaging the cast or macerating skin.

Question 38: The posterior tibial pulse is assessed posterior to which bony landmark to evaluate distal circulation after lower leg casting?

Medial malleolus (Correct answer)
Fibular head
Lateral malleolus
Tibial tuberosity

Correct answer: Medial malleolus

The posterior tibial artery passes behind the medial malleolus and is palpated there to assess distal circulation of the foot.

Question 39: Which structure connects muscles to bones?

Tendons (Correct answer)
Bursae
Ligaments
Cartilage

Correct answer: Tendons

Tendons are strong, fibrous connective tissues that serve to connect muscles to bones. They are essential for transmitting the force generated by muscle contractions to the skeletal system, thereby facilitating movement. In contrast, ligaments connect bones to other bones, providing stability to joints.

Question 40: Which of the following best describes 'standard precautions' in orthopedic casting practice?

Precautions limited to bloodborne pathogen exposure
Precautions used only when a patient has a known infectious disease
Precautions required only in surgical settings
Precautions applied to all patients regardless of infection status (Correct answer)

Correct answer: Precautions applied to all patients regardless of infection status

Standard precautions treat all patients as potentially infectious and are applied universally regardless of known infection status.

Question 41: Which sensory test is used to assess nerve function in the hand before upper extremity casting?

Two-point discrimination (Correct answer)
Tuning fork vibration test
Dermatomal pinprick map
Monofilament pressure test

Correct answer: Two-point discrimination

Two-point discrimination evaluates sensory nerve integrity in the digits and is a key pre-cast neurological check.

Question 42: Which physiological process, driven by the inflammatory response, is responsible for clearing debris and necrotic tissue in the first stage of fracture healing?

Osteoclastic bone resorption
Fibrocartilage deposition by chondrocytes
Periosteal callus formation
Phagocytosis by macrophages and neutrophils (Correct answer)

Correct answer: Phagocytosis by macrophages and neutrophils

In the inflammatory phase, macrophages and neutrophils infiltrate the fracture hematoma to phagocytose debris and necrotic tissue, initiating the healing cascade.

Question 43: Why is skin temperature assessed on both extremities before casting?

To select the appropriate cast padding thickness
To determine ambient room temperature
To confirm the patient does not have a fever
To detect unilateral coolness indicating vascular compromise (Correct answer)

Correct answer: To detect unilateral coolness indicating vascular compromise

A cool extremity compared to the contralateral side may indicate impaired arterial flow requiring investigation before casting.

Question 44: Ear protection during cast removal with an oscillating saw is recommended primarily for:

Only the technician performing frequent removals
Neither, as the saw is below OSHA noise thresholds
The patient and technician, as prolonged noise can cause discomfort (Correct answer)
The patient only, as technicians are trained to tolerate the noise

Correct answer: The patient and technician, as prolonged noise can cause discomfort

Both patient and technician benefit from ear protection during cast removal, especially for children or those sensitive to noise.

Question 45: Which color-coded system is used to guide padding at vulnerable areas in pediatric casts?

There is no color system; anatomy landmarks guide extra padding placement (Correct answer)
Red padding for high-risk areas, green for low-risk
Standard hospital color bands matching allergy status
Blue marks for bony prominences, yellow for skin folds

Correct answer: There is no color system; anatomy landmarks guide extra padding placement

Padding placement in pediatric casts is guided by anatomical landmarks rather than a color-coded system; extra padding is placed over identified bony prominences.

Question 46: Which of the following materials is used to make a thermoplastic splint moldable?

Heating to 60–80°C using a heat gun or warm water (Correct answer)
Mixing with a catalyst powder
Exposure to ultraviolet (UV) light
Immersion in cold water (0–5°C)

Correct answer: Heating to 60–80°C using a heat gun or warm water

Thermoplastic materials become pliable when heated to 60–80°C and harden as they cool to room temperature, allowing custom contouring to the patient's limb.

Question 47: Which material is preferred for initial casting when significant swelling is expected?

Plastic
Fiberglass
Resin
Plaster (Correct answer)

Correct answer: Plaster

Plaster of Paris casts are generally preferred for initial casting when significant swelling is expected because they are more conformable and allow for slight expansion as swelling fluctuates. Unlike fiberglass, plaster can be easily molded to the limb and, if needed, removed or modified more readily in the acute phase. This flexibility helps prevent complications such as compartment syndrome in the early stages of injury.

Question 48: Testing motor function of the ulnar nerve is best accomplished by asking the patient to:

Flex the elbow against resistance
Abduct the fingers (spread them apart) (Correct answer)
Oppose the thumb to the index finger
Extend the wrist against resistance

Correct answer: Abduct the fingers (spread them apart)

Finger abduction is performed by the dorsal interossei, which are innervated by the ulnar nerve, making this the primary motor test for ulnar integrity.

Question 49: In Volkmann's ischemic contracture, which muscle group is primarily affected due to compartment syndrome of the forearm?

Supinator muscle
Intrinsic muscles of the hand
Deep flexors of the forearm (Correct answer)
Extensors of the forearm

Correct answer: Deep flexors of the forearm

The deep flexor compartment of the forearm has the highest tissue pressure in forearm compartment syndrome, leading to ischemia and fibrosis of the flexor digitorum profundus and flexor pollicis longus.

Question 50: Why is elevation recommended immediately after cast placement?

To ease mobility
To reduce swelling and promote circulation (Correct answer)
To harden the cast faster
To prevent itching

Correct answer: To reduce swelling and promote circulation

Elevation of the casted limb above heart level immediately after cast placement is recommended to reduce swelling and promote circulation. This helps to decrease fluid accumulation in the tissues and promotes venous return, thereby minimizing pain and reducing the risk of complications such as compartment syndrome. It aids in maintaining adequate arterial blood flow to the injured area.

Question 51: Which best describes the casting technician's responsibility when the clinician's written cast order appears incomplete?

Ask the patient what cast type the doctor mentioned
Clarify the order with the clinician before proceeding (Correct answer)
Proceed with the most common cast type for that injury
Document the incomplete order and apply the cast as best as possible

Correct answer: Clarify the order with the clinician before proceeding

Ambiguous or incomplete orders must be clarified with the ordering clinician before the procedure to ensure correct treatment and patient safety.

Question 52: Which part of the body would most likely require a short arm cast?

Ankle
Upper arm
Wrist and forearm (Correct answer)
Knee

Correct answer: Wrist and forearm

A short arm cast extends from just below the elbow to the metacarpal heads, effectively immobilizing the wrist and forearm. This type of cast is commonly used for fractures of the distal radius, ulna, or carpal bones, as well as for severe sprains in this region. It allows for full elbow and finger movement while stabilizing the injured area.

Question 53: Synovial fluid is produced by which cellular layer within a joint and serves to lubricate and nourish articular cartilage?

Fibroblasts of the joint capsule
Osteocytes of subchondral bone
Synoviocytes of the synovial membrane (Correct answer)
Chondrocytes of articular cartilage

Correct answer: Synoviocytes of the synovial membrane

Synoviocytes lining the synovial membrane secrete hyaluronate-rich fluid that lubricates articular surfaces and delivers nutrients to avascular cartilage.

Question 54: The subscapularis, infraspinatus, teres minor, and supraspinatus make up the rotator cuff; which one is responsible for internal rotation and is most commonly involved in shoulder impingement if the arm is cast in the wrong position?

Teres minor
Infraspinatus
Subscapularis (Correct answer)
Supraspinatus

Correct answer: Subscapularis

The subscapularis is the only rotator cuff muscle that internally rotates the shoulder and can be impinged or strained when the arm is immobilized in excessive internal rotation.

Question 55: A patient with a hip spica cast develops nausea, vomiting, and abdominal distension on post-operative day 3. Cast syndrome is suspected. The immediate management is:

Oral antiemetics and a liquid diet until symptoms resolve
Prone positioning to relieve duodenal compression
NPO, nasogastric tube decompression, and opening or removing the abdominal portion of the cast (Correct answer)
Advancing to a regular diet to stimulate peristalsis

Correct answer: NPO, nasogastric tube decompression, and opening or removing the abdominal portion of the cast

Treatment of cast syndrome includes decompressing the abdomen by cutting or removing the cast, along with NGT decompression and IV fluids.

Question 56: What is the medico-legal significance of thorough post-cast neurovascular documentation?

It is required only for surgical procedures, not casting
It provides evidence that complications were identified or excluded at the time of casting (Correct answer)
It speeds up insurance reimbursement
It allows the technician to discharge the patient independently

Correct answer: It provides evidence that complications were identified or excluded at the time of casting

Post-cast CSM documentation demonstrates that the technician checked for complications; absence of documentation creates liability if complications arise later.

Question 57: Which joint is classified as a hinge joint?

Hip
Wrist
Elbow (Correct answer)
Shoulder

Correct answer: Elbow

The elbow is classified as a hinge joint because it primarily allows movement in one plane, similar to a door hinge, permitting flexion and extension. This type of joint provides stability while facilitating a specific range of motion. The shoulder and hip, for example, are ball-and-socket joints, offering a much wider range of multi-directional movement.

Question 58: During cast removal, the skin under a long-standing plaster cast is commonly found to be:

Infected in most cases
Dry, flaky, and possibly malodorous (Correct answer)
Deeply pigmented
Thickened from pressure

Correct answer: Dry, flaky, and possibly malodorous

Weeks of immobilization causes skin dryness, desquamation (scaling), and sometimes odor due to trapped dead skin cells and moisture.

Question 59: Why is extra padding used when casting pediatric patients compared to adults?

Pediatric skin is thicker and requires more compression
Children move less, so padding prevents cast loosening
Children have more prominent bony areas and less subcutaneous tissue (Correct answer)
Children require thicker casts for activity restriction

Correct answer: Children have more prominent bony areas and less subcutaneous tissue

Bony prominences in children have less protective fat and are at greater risk for pressure injury, requiring additional padding.

Question 60: Which professional standard requires orthopedic casting technicians to maintain competency through continuing education?

HIPAA Privacy Rule
The OCC certification maintenance requirements (Correct answer)
CDC Isolation Guidelines
OSHA Hazard Communication Standard

Correct answer: The OCC certification maintenance requirements

OCC certification bodies require continuing education credits for certification renewal to ensure ongoing competency.

Question 61: HIPAA regulations require the casting technician to:

Post patient casting records in the waiting room for family access
Retain patient records for at least 30 days only
Protect patient health information and share it only with authorized individuals (Correct answer)
Share neurovascular findings with the patient's employer upon request

Correct answer: Protect patient health information and share it only with authorized individuals

HIPAA mandates confidentiality of all patient health information and permits disclosure only with patient authorization or for treatment, payment, and operations.

Question 62: In patients with peripheral vascular disease, casting should be approached with caution because:

Impaired circulation reduces wound healing and increases ischemia risk under the cast (Correct answer)
Vascular disease makes the skin too slippery for cast adhesion
Peripheral vascular disease causes abnormally fast cast setting
Arterial stents may be damaged by cast pressure

Correct answer: Impaired circulation reduces wound healing and increases ischemia risk under the cast

Poor peripheral circulation compromises tissue oxygenation; even mild cast pressure can precipitate ischemic skin breakdown.

Question 63: Which nerve is at risk of injury when the cast padding is applied too tightly over the medial epicondyle of the humerus?

Median nerve
Musculocutaneous nerve
Radial nerve
Ulnar nerve (Correct answer)

Correct answer: Ulnar nerve

The ulnar nerve passes through the cubital tunnel posterior to the medial epicondyle and is highly susceptible to pressure injury there.

Question 64: What is the approximate full weight-bearing time after application of a standard plaster long leg cast for a stable fracture?

At 2 weeks after radiographic confirmation
Immediately after cast hardens (24 hours)
Not until the cast is removed
At 48–72 hours once the cast is fully dry (Correct answer)

Correct answer: At 48–72 hours once the cast is fully dry

Plaster reaches adequate strength for limited weight-bearing within 24–48 hours as it fully dries and crystallizes, though physician guidance determines timing.

Question 65: Which cast material requires the MOST caution during saw removal due to increased heat generation?

Fiberglass (Correct answer)
Cotton-based splint material
Thermoplastic
Plaster of Paris

Correct answer: Fiberglass

Fiberglass generates more heat during sawing than plaster, increasing burn risk if the saw lingers in one position.

Question 66: What is the purpose of the 'ear' or 'window' cut into a cast?

To reduce weight of the cast
To improve cast ventilation and reduce sweating
To facilitate cast removal with a cast saw
To allow inspection or relieve pressure over a specific area (Correct answer)

Correct answer: To allow inspection or relieve pressure over a specific area

A cast window allows the clinician to inspect the underlying skin, relieve localized pressure, or access a wound beneath the cast.

Question 67: In a patient with a spinal cord injury who lacks sensation, the primary casting concern is:

Bone healing being slower due to paralysis
Muscle spasticity breaking the cast
Autonomic dysreflexia triggered by the cast saw
Pressure injury that the patient cannot feel or report (Correct answer)

Correct answer: Pressure injury that the patient cannot feel or report

Lack of sensation means pressure sores can develop silently; aggressive padding and very frequent skin checks are mandatory.

Question 68: Which compartment of the lower leg contains the anterior tibial artery and deep peroneal nerve?

Deep posterior compartment
Anterior compartment (Correct answer)
Lateral compartment
Posterior compartment

Correct answer: Anterior compartment

The anterior compartment of the lower leg contains the anterior tibial artery, deep peroneal nerve, and the dorsiflexor muscles.

Question 69: Which muscle is the primary dorsiflexor of the ankle and can be weakened if the common peroneal nerve is compressed by a poorly applied cast?

Tibialis posterior
Peroneus longus
Gastrocnemius
Tibialis anterior (Correct answer)

Correct answer: Tibialis anterior

The tibialis anterior is the main dorsiflexor of the ankle and is innervated by the deep peroneal nerve, a branch of the common peroneal nerve.

Question 70: In a pediatric patient, which complication is uniquely associated with Salter-Harris fractures managed with casting?

Thermal burn susceptibility due to thinner pediatric skin
Faster cast degradation due to higher activity level
Growth plate arrest leading to limb length discrepancy (Correct answer)
Higher rate of compartment syndrome than adults

Correct answer: Growth plate arrest leading to limb length discrepancy

Damage to the physis (growth plate) can cause premature closure, resulting in angular deformity or limb length discrepancy.

Question 71: Why should casting rooms have proper ventilation?

To reduce airborne irritants (Correct answer)
To control room temperature
To dry the cast faster
To improve visibility

Correct answer: To reduce airborne irritants

Casting materials, particularly during application and removal, can release fine dust particles, fumes, and odors into the air. Proper ventilation in casting rooms is essential to dilute and remove these airborne irritants. This protects both patients and healthcare workers from respiratory irritation, allergic reactions, and potential long-term health effects associated with inhaling these substances.

Question 72: Under HIPAA, sharing a patient's casting diagnosis and treatment details with a family member who is not listed as an authorized contact is:

Required when the family member is the emergency contact
Acceptable if the patient is a minor
Permitted in all cases since family members are trusted parties
A violation unless the patient has given explicit authorization (Correct answer)

Correct answer: A violation unless the patient has given explicit authorization

HIPAA prohibits disclosing protected health information to unauthorized parties, including family members, without explicit patient authorization.

Question 73: A cast window is most appropriately cut in order to:

Allow the patient to perform range-of-motion exercises
Reduce the overall weight of the cast
Improve ventilation and reduce cast odor
Inspect a wound site or assess vascular access (Correct answer)

Correct answer: Inspect a wound site or assess vascular access

A cast window is cut to provide direct access to a specific area such as a wound for inspection, or to palpate a pulse when there is concern about vascular status.

Question 74: Which sign is most concerning for compartment syndrome in a casted limb?

Dry skin under cast
Mild swelling
Severe pain unrelieved by analgesics (Correct answer)
Pain on light touch

Correct answer: Severe pain unrelieved by analgesics

Severe pain that is disproportionate to the injury and unrelieved by standard analgesics is the most concerning sign for compartment syndrome in a casted limb. This condition occurs when increased pressure within a confined muscle compartment compromises circulation and nerve function. It is a medical emergency requiring immediate intervention to prevent permanent tissue damage.

Question 75: The peroneal (fibular) nerve wraps around which bony prominence, making it especially vulnerable during lower extremity casting?

Tibial tuberosity
Lateral malleolus
Medial malleolus
Fibular head (Correct answer)

Correct answer: Fibular head

The common peroneal nerve wraps around the fibular head, where pressure from cast edges can cause foot drop.

Question 76: Which action violates proper infection control when applying a fiberglass cast?

Wearing nitrile gloves throughout the application
Placing the opened cast roll on the patient's bedsheet between dips (Correct answer)
Applying the cast in smooth, overlapping turns
Dipping the roll in water and squeezing out excess

Correct answer: Placing the opened cast roll on the patient's bedsheet between dips

Placing an opened sterile casting roll on a non-sterile surface like a bedsheet contaminates it before application.

Question 77: In toddlers and infants, which type of cast is commonly used to treat developmental dysplasia of the hip (DDH)?

Spica cast (Correct answer)
Slipper cast
Short arm cast
Long leg cast

Correct answer: Spica cast

A hip spica cast holds the hips in the abducted, flexed position required to seat the femoral head in the acetabulum during DDH treatment.

Question 78: What is the purpose of maintaining a quality assurance log for casting procedures?

To comply with OSHA physical hazard reporting requirements
To identify patterns of complications or errors and improve outcomes (Correct answer)
To track patient billing for insurance purposes
To document how many casts each technician applies per day

Correct answer: To identify patterns of complications or errors and improve outcomes

Quality assurance data identifies systemic issues — such as recurring pressure injuries — allowing process improvements that enhance patient safety.

Question 79: Volkmann's ischemic contracture is a devastating complication that most commonly results from:

Infection under the cast padding
Unrelieved compartment syndrome in the forearm (Correct answer)
Excessive cast padding that restricts motion
Prolonged but uncomplicated immobilization

Correct answer: Unrelieved compartment syndrome in the forearm

Volkmann's ischemic contracture results from untreated compartment syndrome causing ischemic necrosis of forearm muscles, leading to permanent flexion contracture.

Question 80: Cyanosis of the toes in a patient with a lower extremity cast most likely indicates:

Superficial skin irritation from casting material
Normal post-casting discoloration
Venous congestion and impaired venous return (Correct answer)
Arterial occlusion

Correct answer: Venous congestion and impaired venous return

Cyanosis (blue discoloration) results from deoxygenated blood pooling in the tissues, indicating impaired venous return rather than arterial occlusion.

Question 81: A fiberglass cast is applied too tightly over a diabetic patient's foot. Which complication is of GREATEST concern in this population?

Higher likelihood of allergic reaction to fiberglass resin
Increased risk of cast cracking from reduced bone density
Delayed fracture healing due to restricted blood flow
Undetected pressure ulceration progressing to osteomyelitis due to peripheral neuropathy (Correct answer)

Correct answer: Undetected pressure ulceration progressing to osteomyelitis due to peripheral neuropathy

Diabetic peripheral neuropathy masks pain from pressure injuries, allowing ulcers to progress to deep infection and osteomyelitis without warning.

Question 82: Which type of joint allows the rotational movement required for forearm pronation and supination?

Hinge joint
Ball-and-socket joint
Gliding joint
Pivot joint (Correct answer)

Correct answer: Pivot joint

Pivot joints, such as the proximal and distal radioulnar joints, allow the rotation needed for pronation and supination.

Question 83: A capillary refill time greater than how many seconds is considered abnormal in a casted extremity?

1 second
4 seconds
2 seconds (Correct answer)
6 seconds

Correct answer: 2 seconds

Capillary refill greater than 2 seconds indicates impaired peripheral perfusion and requires prompt evaluation.

Question 84: Which of the following is a critical first step in cast application?

Shaping the cast edges
Applying padding over bony prominences (Correct answer)
Choosing cast color
Mixing the casting material

Correct answer: Applying padding over bony prominences

A critical first step in cast application is to apply adequate padding, especially over bony prominences. This padding protects the patient's skin and underlying tissues from pressure sores, skin breakdown, and nerve compression that can result from the rigid casting material. Proper padding ensures patient comfort and prevents complications throughout the immobilization period.

Question 85: Which combination of findings most strongly suggests adequate neurovascular status in a casted extremity?

Pale, cool digits with capillary refill of 4 seconds
Pink, warm digits with capillary refill under 2 seconds and intact sensation (Correct answer)
Mild swelling with absent radial pulse
Cyanotic digits with pain at rest

Correct answer: Pink, warm digits with capillary refill under 2 seconds and intact sensation

Pink, warm digits with brisk capillary refill under 2 seconds and intact sensation together confirm adequate arterial perfusion, venous return, and nerve function.

Question 86: Which assessment finding in a casted lower extremity requires IMMEDIATE notification of the supervising provider?

Warm and pink toes with brisk capillary refill
Slight itching sensation under the cast
Mild swelling of the toes
Absence of the dorsalis pedis pulse (Correct answer)

Correct answer: Absence of the dorsalis pedis pulse

Absence of a pedal pulse indicates potential vascular occlusion and is an emergency requiring immediate physician notification.

Question 87: Fiberglass casting tape should be dipped in water at approximately what temperature for optimal working time?

Hot water (50–60°C)
Room temperature water (20–25°C) (Correct answer)
Warm water (35–40°C)
Ice-cold water (0–5°C)

Correct answer: Room temperature water (20–25°C)

Room temperature water is recommended for fiberglass tape to provide adequate working time; warm water accelerates the setting reaction.

Question 88: When a casting technician discovers an error in a patient's record after documentation, the correct way to correct it is to:

Delete the entry entirely and rewrite from scratch
Draw a single line through the error, write the correction, date it, and initial it (Correct answer)
Leave the error unchanged to maintain an accurate timeline
White out the error and write the correct information over it

Correct answer: Draw a single line through the error, write the correction, date it, and initial it

Medical record corrections require a single-line strikethrough with the correction, date, and initials — white-out and deletion are considered falsification.

Question 89: When removing a cast from a patient with a known MRSA infection, which PPE combination is most appropriate?

Gloves only
Gloves, gown, and surgical mask (Correct answer)
Gloves and gown
Gloves, gown, N95 respirator, and eye protection

Correct answer: Gloves, gown, and surgical mask

Contact precautions for MRSA require gloves, gown, and a mask to protect against splatter during cast removal.

Question 90: Which of the following signs indicates that a patient's cast may be too tight and requires immediate evaluation?

Visible plaster dust on the cast surface
Mild pruritus (itching) under the cast
Mild warmth over the fracture site
Increased pain, numbness, or inability to move distal digits (Correct answer)

Correct answer: Increased pain, numbness, or inability to move distal digits

Increasing pain, numbness, or loss of motor function distal to the cast are warning signs of vascular compromise or compartment syndrome requiring emergent evaluation.

Question 91: A patient presents with a cast that has a foul odor and visible green discoloration at the wound site. What is the priority action?

Apply antifungal powder through the cast opening
Reinforce the cast with additional padding
Document findings and notify the supervising physician immediately (Correct answer)
Schedule a follow-up appointment in one week

Correct answer: Document findings and notify the supervising physician immediately

Green discoloration and foul odor are signs of potential infection requiring immediate physician notification.

Question 92: A parent asks if their child can bathe with a fiberglass cast. The correct response is:

Fiberglass casts are fully waterproof and bathing is allowed
Sponge bath only is needed and the cast can get minimally wet
Bathing must be avoided entirely until cast removal
The cast must be kept dry; use a waterproof cast cover for bathing (Correct answer)

Correct answer: The cast must be kept dry; use a waterproof cast cover for bathing

Standard fiberglass casts are not fully waterproof because the inner padding absorbs water; a waterproof liner system is required for water exposure.

Question 93: Before applying a long arm cast, the technician should document motor function by asking the patient to:

Perform deep breathing
Walk on the extremity
Squeeze a blood pressure cuff
Flex and extend the fingers and wrist (Correct answer)

Correct answer: Flex and extend the fingers and wrist

Active range of motion of fingers and wrist documents baseline motor nerve function before the cast is applied.

Question 94: After both medial and lateral cuts are made during bivalving, which instrument is used to separate the cast halves?

Bandage scissors
Hemostat
Kelly forceps
Cast spreader (Correct answer)

Correct answer: Cast spreader

A cast spreader (or cast bender) is inserted into the saw cuts to gently pry the two halves apart without stressing the extremity.

Question 95: Which casting material requires the use of polyurethane-resistant gloves rather than standard latex gloves during application?

Plaster of Paris
Fiberglass casting tape with polyurethane resin (Correct answer)
Waterproof Gore-Tex liner
Cotton padding and stockinette

Correct answer: Fiberglass casting tape with polyurethane resin

Fiberglass casting tape contains polyurethane resin that can penetrate standard latex gloves; polyurethane-resistant or heavy nitrile gloves are recommended.

Question 96: Why must growth plates (physes) receive special consideration when reviewing X-rays before pediatric casting?

Physeal injuries can affect bone growth and require specific fracture classification (Correct answer)
Growth plates cause the cast to heat up during application
Physeal injuries always require surgical repair, making casting unnecessary
Growth plates are not visible on X-ray and cannot be assessed

Correct answer: Physeal injuries can affect bone growth and require specific fracture classification

Salter-Harris physeal fractures have implications for long-term growth and may change cast type, duration, or referral urgency.

Question 97: The epiphyseal plate (growth plate) in a pediatric patient is composed primarily of which tissue?

Fibrocartilage
Dense fibrous tissue
Hyaline cartilage (Correct answer)
Elastic cartilage

Correct answer: Hyaline cartilage

The epiphyseal plate consists of hyaline cartilage where longitudinal bone growth occurs in children.

Question 98: A patient with latex allergy is scheduled for casting. The casting technician should:

Use latex-free gloves, padding, and stockinette and ensure all room supplies are latex-free (Correct answer)
Proceed normally since casting materials do not contain latex
Simply avoid using gloves during the procedure
Apply a barrier layer of standard stockinette to prevent skin contact with latex

Correct answer: Use latex-free gloves, padding, and stockinette and ensure all room supplies are latex-free

Latex allergy requires a completely latex-free environment including gloves, padding, and all contact supplies to prevent allergic reactions.

Question 99: Which protective technique is used over bony prominences when running the cast saw?

Slide a cast spreader or tongue depressor between the blade and the skin (Correct answer)
Slow the saw speed to minimum
Apply extra stockinette over the prominence
Mark the area and skip it with the saw

Correct answer: Slide a cast spreader or tongue depressor between the blade and the skin

Inserting a flat instrument between the blade and skin over bony areas protects against saw burns and lacerations.

Question 100: A sugar-tong splint for a distal radius fracture controls which primary motion?

Finger metacarpophalangeal flexion
Shoulder abduction and adduction
Wrist flexion and extension only
Forearm pronation and supination (Correct answer)

Correct answer: Forearm pronation and supination

The sugar-tong splint wraps around the elbow in a U-shape, effectively controlling forearm pronation and supination while allowing some elbow flexion.

Question 101: For a long leg cast, the knee is typically immobilized in how many degrees of flexion?

5–10 degrees of flexion
45–60 degrees of flexion
20–30 degrees of flexion (Correct answer)
0 degrees (full extension)

Correct answer: 20–30 degrees of flexion

A long leg cast is typically applied with 20–30 degrees of knee flexion to provide stability while allowing the patient to bear weight comfortably.

Question 102: Which type of bone cell is responsible for resorbing bone during the remodeling phase of fracture healing?

Chondrocyte
Osteocyte
Osteoclast (Correct answer)
Osteoblast

Correct answer: Osteoclast

Osteoclasts are multinucleated cells that resorb excess callus during bone remodeling, restoring the original bone architecture.

Question 103: The Ottawa Ankle Rules help clinicians determine:

The grade of ligamentous ankle sprain
When to remove an ankle cast
Whether ankle X-rays are needed based on specific tenderness and weight-bearing ability (Correct answer)
What cast type to apply to an ankle fracture

Correct answer: Whether ankle X-rays are needed based on specific tenderness and weight-bearing ability

The Ottawa Ankle Rules are validated clinical criteria that guide X-ray ordering for ankle injuries, reducing unnecessary imaging.

Question 104: What does the acronym 'CSM' stand for in orthopedic casting assessment?

Cast, Splint, Mobilize
Contour, Secure, Mold
Compress, Stabilize, Monitor
Circulation, Sensation, Movement (Correct answer)

Correct answer: Circulation, Sensation, Movement

CSM — Circulation, Sensation, Movement — is the standard neurovascular checklist performed before and after cast application.

Question 105: Sensation in the first dorsal web space between the first and second toes is supplied by which nerve?

Superficial peroneal nerve
Deep peroneal nerve (Correct answer)
Sural nerve
Tibial nerve

Correct answer: Deep peroneal nerve

The deep peroneal nerve provides sensory innervation exclusively to the first dorsal web space of the foot and is assessed to detect compression at the anterior ankle.

Question 106: A Colles fracture is a distal radius fracture with which characteristic displacement?

Dorsal displacement and angulation of the distal fragment (dinner fork deformity) (Correct answer)
Impaction without angulation
Transverse fracture with lateral displacement
Volar displacement of the distal fragment

Correct answer: Dorsal displacement and angulation of the distal fragment (dinner fork deformity)

The classic Colles fracture produces dorsal tilt of the distal fragment, creating the dinner fork silhouette on lateral X-ray.

Question 107: Which of the following best describes cast syndrome (Superior Mesenteric Artery syndrome)?

Compartment syndrome of the abdominal wall
Vascular compression of the duodenum by the SMA causing nausea and vomiting (Correct answer)
Skin breakdown under a spica cast
Pressure necrosis from a poorly fitting hip spica

Correct answer: Vascular compression of the duodenum by the SMA causing nausea and vomiting

Cast syndrome occurs when the SMA compresses the duodenum due to body position in a spica cast, causing nausea, vomiting, and abdominal distension.

Question 108: A patient has a known latex allergy. The casting technician should use:

No gloves since direct contact is minimal
Standard latex gloves covered by a second glove
Vinyl gloves only and standard stockinette
Latex-free gloves and non-latex stockinette (Correct answer)

Correct answer: Latex-free gloves and non-latex stockinette

All materials contacting the patient and technician must be latex-free to prevent allergic reaction in latex-allergic patients.

Question 109: What is the correct instruction for skin care immediately after cast removal?

Avoid washing for 48 hours
Apply rubbing alcohol to disinfect the skin
Vigorously scrub dead skin with a brush
Gently wash with mild soap and water; apply moisturizer (Correct answer)

Correct answer: Gently wash with mild soap and water; apply moisturizer

Gentle cleansing and moisturization remove accumulated dead skin and restore normal hydration without traumatizing fragile post-cast skin.

Question 110: After bivalving, what is the NEXT step to fully relieve circumferential pressure?

Remove one shell and discard it
Cut and spread the underlying cast padding (Correct answer)
Apply an elastic bandage over the bivalved cast
Soak the cast in warm water

Correct answer: Cut and spread the underlying cast padding

The inner padding layer also contributes to circumferential pressure and must be cut along the same bivalve lines to fully decompress.

Question 111: How is capillary refill time assessed in a patient about to receive a cast?

Auscultate for distal pulse with a stethoscope
Press the nail bed, release, and count seconds until color returns (Correct answer)
Check skin temperature with a thermometer
Measure blood pressure distally

Correct answer: Press the nail bed, release, and count seconds until color returns

Normal capillary refill is less than 2 seconds; prolonged refill suggests compromised circulation.

Question 112: When compartment syndrome is suspected in a casted extremity, the MOST appropriate immediate action is to:

Bivalve the cast and notify the physician immediately (Correct answer)
Administer analgesics and reassess in 30 minutes
Elevate the extremity and apply ice packs
Apply a compression wrap over the cast

Correct answer: Bivalve the cast and notify the physician immediately

Bivalving (splitting the cast on both sides) along with cutting the underlying padding relieves pressure immediately, while prompt physician notification ensures definitive treatment.

Question 113: Edema assessment before casting is BEST performed by:

Asking the patient if the extremity feels swollen
Pressing the skin and observing for pitting
Reviewing the X-ray for soft tissue shadow
Comparing circumference measurements of both extremities (Correct answer)

Correct answer: Comparing circumference measurements of both extremities

Objective circumferential measurements document baseline swelling and allow comparison after casting to detect increasing edema.

Question 114: Before casting a diabetic patient, which additional assessment is MOST important?

Peripheral blood smear
Blood glucose level measurement
Dietary history for the past 24 hours
Detailed skin integrity check for neuropathic ulcers or insensate areas (Correct answer)

Correct answer: Detailed skin integrity check for neuropathic ulcers or insensate areas

Diabetic patients may have peripheral neuropathy and impaired wound healing, making skin inspection before casting critical.

Question 115: Which nerve is assessed by testing sensation in the first dorsal web space (between the thumb and index finger) of the hand?

Median nerve
Superficial radial nerve (Correct answer)
Ulnar nerve
Anterior interosseous nerve

Correct answer: Superficial radial nerve

The superficial radial nerve provides sensory innervation to the first dorsal web space and dorsolateral hand.

Question 116: Which anatomical feature of the tibia makes it the weight-bearing bone of the leg, as opposed to the fibula?

The tibia is more lateral in position
The tibia articulates with the femur at the knee and talus at the ankle (Correct answer)
The tibia contains more cancellous bone than the fibula
The tibia has a larger medullary canal

Correct answer: The tibia articulates with the femur at the knee and talus at the ankle

The tibia is the primary weight-bearing bone because it forms the tibiotalar (ankle) joint inferiorly and the tibiofemoral joint superiorly, directly transmitting axial load.

Question 117: Which finding during pre-cast assessment would require IMMEDIATE notification of the supervising clinician?

Mild soft tissue swelling
Minor skin abrasion at the injury site
Patient anxiety about the procedure
Absent distal pulse (Correct answer)

Correct answer: Absent distal pulse

Absent distal pulse indicates potential vascular compromise and must be reported immediately before casting proceeds.

Question 118: Which cast provides the best immobilization for a metatarsal shaft fracture that requires protected weight-bearing?

Long leg cast
Foot slipper cast only
Cylinder cast
Short leg walking cast or walking boot (Correct answer)

Correct answer: Short leg walking cast or walking boot

A short leg walking cast or removable walking boot immobilizes the forefoot while allowing controlled weight-bearing and ambulation.

Question 119: What is the minimum recommended number of plaster layers for a walking cast intended to bear body weight?

12–16 layers
20+ layers
6–8 layers (Correct answer)
2–4 layers

Correct answer: 6–8 layers

Weight-bearing plaster casts typically require 6–8 layers (more over stress areas) to provide adequate structural strength for ambulation.

Question 120: Which blood vessel is most at risk of compression when applying a cast at the antecubital fossa?

Axillary artery
Radial artery
Ulnar artery
Brachial artery (Correct answer)

Correct answer: Brachial artery

The brachial artery runs through the antecubital fossa and is vulnerable to compression from tight cast edges or padding in that area.

Question 121: A patient with a short arm cast develops redness and blistering at the proximal cast edge. This is most consistent with:

Mechanical pressure sore from a poorly trimmed cast edge (Correct answer)
Contact dermatitis from the casting material
Cellulitis of the forearm
Early compartment syndrome

Correct answer: Mechanical pressure sore from a poorly trimmed cast edge

Blistering and redness localized to the cast edge indicate skin trauma from a rough or inadequately padded border.

Question 122: A patient with a recently applied long leg cast reports numbness of the little toe and the lateral aspect of the foot. Which nerve is most likely compressed?

Sural nerve (Correct answer)
Tibial nerve
Superficial peroneal nerve
Deep peroneal nerve

Correct answer: Sural nerve

The sural nerve provides sensation to the lateral foot and little toe, and is vulnerable to compression along the lateral ankle area.

Question 123: Which of the following is TRUE regarding cast padding application?

Padding should be applied tightly to minimize bulk
Each successive layer should overlap the previous by 25–50% (Correct answer)
Padding is optional when using fiberglass tape
Padding should only be applied at the proximal and distal ends

Correct answer: Each successive layer should overlap the previous by 25–50%

Cast padding is applied in overlapping layers of 25–50% to ensure uniform thickness and prevent gaps that could cause pressure points.

Question 124: When applying a short arm cast, the wrist should typically be positioned in how many degrees of dorsiflexion?

10–20 degrees (Correct answer)
50–60 degrees
30–45 degrees
0 degrees (neutral)

Correct answer: 10–20 degrees

The wrist is typically positioned in 10–20 degrees of dorsiflexion for a functional short arm cast, allowing optimal hand function.

Question 125: What is the primary contraindication for closed casting of an open (compound) fracture?

The cast would not adhere over an open wound
Open fractures require immediate casting to prevent further bone displacement
Open fractures always require amputation
High infection risk requires wound management before casting (Correct answer)

Correct answer: High infection risk requires wound management before casting

Open fractures carry high infection risk; wound irrigation, debridement, and often surgical fixation are performed before any definitive cast application.

Question 126: How does an oscillating cast saw avoid cutting the patient's skin?

It uses suction to pull the cast away from the skin
Its blade is coated with a protective plastic layer
It vibrates rapidly but does not rotate, cutting rigid material but bouncing off soft tissue (Correct answer)
The blade automatically stops when it contacts skin

Correct answer: It vibrates rapidly but does not rotate, cutting rigid material but bouncing off soft tissue

The oscillating motion cuts through hard fiberglass or plaster but does not slice soft, pliable skin when proper technique is used.

Question 127: When assessing cast integrity, a cast that sounds hollow upon percussion most likely indicates:

Internal air pockets or delamination that compromise structural strength (Correct answer)
Normal variation in plaster density
Correct padding thickness beneath the cast
Adequate curing of the casting material

Correct answer: Internal air pockets or delamination that compromise structural strength

A hollow sound on percussion suggests internal voids or delamination, meaning the cast has lost structural integrity and may fail.

Question 128: When disposing of a removed fiberglass cast contaminated with wound drainage, it should be treated as:

Recyclable material due to its fiberglass composition
Hazardous chemical waste due to the resin content
Regulated medical waste requiring biohazard disposal (Correct answer)
Regular trash that can be discarded in any waste bin

Correct answer: Regulated medical waste requiring biohazard disposal

Casting material saturated with blood or wound drainage is classified as regulated medical waste and requires biohazard disposal.

Question 129: Which fracture results from repetitive loading rather than acute trauma?

Pathologic fracture
Comminuted fracture
Stress fracture (Correct answer)
Avulsion fracture

Correct answer: Stress fracture

Stress fractures develop from cumulative microtrauma — such as repetitive impact in athletes — rather than a single traumatic event.

Question 130: When removing a cast, the saw should be moved in which pattern?

In and out (plunging motion) along the cast surface, not dragged (Correct answer)
In circular motions around the extremity
In a single long cut straight down the center
In a continuous drag along the length

Correct answer: In and out (plunging motion) along the cast surface, not dragged

A plunging in-and-out motion prevents overheating and reduces the risk of skin burns and lacerations.

Question 131: When molding a cast, which technique is recommended to avoid creating pressure points?

Using fingertip pressure to create contoured indentations
Rolling a dowel rod along the cast surface
Applying strips of tape over the wet cast for additional support
Using the palm and thenar eminence to apply broad, even pressure (Correct answer)

Correct answer: Using the palm and thenar eminence to apply broad, even pressure

Broad palm and thenar eminence molding distributes pressure evenly, preventing focal pressure points that can cause skin breakdown.

Question 132: Before applying a cast, what is the FIRST step in patient assessment?

Review neurovascular status distal to the injury (Correct answer)
Obtain patient weight
Prepare stockinette
Select casting material

Correct answer: Review neurovascular status distal to the injury

Neurovascular assessment (circulation, sensation, movement) must be performed and documented before any cast application.

Question 133: When casting a child with an upper extremity fracture, the wrist is typically positioned in:

Neutral (0 degrees) for all pediatric wrist injuries
Full flexion to relax the flexor tendons
Full extension to maximize immobilization
Slight extension (10-15 degrees) for most forearm fractures (Correct answer)

Correct answer: Slight extension (10-15 degrees) for most forearm fractures

Slight wrist extension is the standard functional position for most pediatric forearm and wrist fractures unless otherwise specified by the clinician.

Question 134: Which complication is MOST associated with the use of fiberglass casting material compared to plaster?

Greater skin laceration risk during cast removal (Correct answer)
Significantly higher risk of thermal burns
Increased cast weight and bulk
Higher risk of cast cracking under load

Correct answer: Greater skin laceration risk during cast removal

Fiberglass is harder and more rigid than plaster, making the oscillating cast saw more likely to lacerate skin if the saw is not used correctly during removal.

Question 135: What should be done if a cast technician experiences a needle-stick injury?

Wash with water and resume work
Ignore it unless it bleeds
Report it and follow post-exposure protocol (Correct answer)
Wait and monitor for symptoms

Correct answer: Report it and follow post-exposure protocol

Any needle-stick injury is a serious occupational exposure that carries the risk of transmitting bloodborne pathogens. The immediate and correct action is to report the incident to a supervisor and follow the established post-exposure protocol. This protocol typically includes wound care, medical evaluation, and potential prophylactic treatment to ensure the healthcare worker's safety and health.

Question 136: What instruction should the patient receive about positioning the casted extremity immediately after application?

Apply ice directly on top of the cast
Keep the extremity in a dependent position
Elevate above the level of the heart (Correct answer)
Avoid any movement for 48 hours

Correct answer: Elevate above the level of the heart

Elevation reduces post-casting swelling and decreases the risk of cast tightness and neurovascular compromise.

Question 137: During cast removal with an oscillating saw, the technician should move the saw in a:

Continuous longitudinal sliding motion from proximal to distal
Firm side-to-side rocking motion perpendicular to the skin, advancing incrementally (Correct answer)
Rapid plunging motion to minimize heat generation
Circular motion to cut through in a single pass

Correct answer: Firm side-to-side rocking motion perpendicular to the skin, advancing incrementally

The oscillating cast saw should be used with a controlled up-and-down rocking motion—pushing through the cast then lifting—to cut the cast without cutting skin.

Question 138: When converting a circumferential cast to a bivalved cast for home use, how are the two shells secured?

With an elastic (ACE) bandage wrapped over both halves (Correct answer)
By taping the shells together with duct tape
By applying a new thin layer of plaster over the cut lines
By stapling the edges of the shells

Correct answer: With an elastic (ACE) bandage wrapped over both halves

An elastic bandage holds bivalved cast shells in place while allowing removal for skin inspection and physical therapy.

Question 139: What position should a patient's extremity be in during pre-cast neurovascular assessment?

Functional position appropriate for the injury (Correct answer)
Dependent (hanging down)
Elevated above heart level only
Fully extended

Correct answer: Functional position appropriate for the injury

The extremity should be held in the planned functional casting position so that assessment reflects the post-cast condition.

Question 140: Which fracture classification describes a fracture in which one cortex buckles but does not completely break, common in pediatric patients?

Torus (buckle) fracture (Correct answer)
Comminuted fracture
Stress fracture
Greenstick fracture

Correct answer: Torus (buckle) fracture

A torus fracture involves a buckling of one cortex without a complete break, occurring in children due to their more porous, compliant bone.

Question 141: A cast that is too loose will most likely result in which complication?

Skin maceration from trapped moisture
Thermal burn during curing
Malunion due to inadequate fracture immobilization (Correct answer)
Compartment syndrome

Correct answer: Malunion due to inadequate fracture immobilization

A loose cast allows fracture fragments to move, potentially leading to malunion or malreduction of the fracture during the healing period.

Question 142: Before casting a patient who takes anticoagulant medication, the casting technician should:

Delay casting for 24 hours
Double the padding to account for anticipated swelling
Proceed without modification
Note the medication and alert the supervising clinician (Correct answer)

Correct answer: Note the medication and alert the supervising clinician

Anticoagulants increase bleeding risk and may affect cast management decisions; the supervising clinician must be informed.

Question 143: The primary reason cast technicians should avoid wearing artificial nails or chipped nail polish is:

Risk of nail fragments contaminating casting materials
Patient allergies to nail products
Artificial nails harbor more microorganisms and may compromise glove integrity (Correct answer)
Appearance standards required by most healthcare facilities

Correct answer: Artificial nails harbor more microorganisms and may compromise glove integrity

Studies show artificial nails harbor significantly more gram-negative bacteria and fungi, increasing infection transmission risk.

Question 144: Which feature of a pediatric hip spica cast requires specific skin care instructions for parents?

The perineal opening must be kept clean and dry to prevent skin breakdown (Correct answer)
The cast must be painted weekly to maintain moisture resistance
The cast must be removed nightly for skin inspection
The child must remain completely supine for the full treatment period

Correct answer: The perineal opening must be kept clean and dry to prevent skin breakdown

The perineal area is prone to soiling and maceration in a spica cast; parents must receive detailed hygiene instructions to prevent infection.

Question 145: Why is it important to use gloves when handling casting material?

To improve grip strength
To avoid staining the cast
To shape the cast faster
To prevent skin irritation and burns (Correct answer)

Correct answer: To prevent skin irritation and burns

It is crucial to use gloves when handling casting material because both plaster and fiberglass resins undergo an exothermic reaction (heat-generating) during the setting process. Direct contact with these materials can cause skin irritation or thermal burns. Gloves provide a protective barrier, safeguarding the technician's skin from chemical exposure and heat.

Question 146: A patient refuses a cast recommended by the physician. The casting technician's role is to:

Discharge the patient immediately without documentation
Attempt to convince the patient until they agree
Apply the cast anyway to protect the patient's health
Document the refusal and notify the supervising clinician (Correct answer)

Correct answer: Document the refusal and notify the supervising clinician

Competent patients have the right to refuse treatment; the technician must document the refusal and inform the clinician so appropriate follow-up can be arranged.

Question 147: Heat generated by the oscillating saw can cause skin burns. This risk is BEST reduced by:

Cooling the blade with water during cutting
Pressing firmly to cut faster
Using a lower-frequency saw setting
Using a plunging motion and limiting contact time at each point (Correct answer)

Correct answer: Using a plunging motion and limiting contact time at each point

Repeated brief contacts with the oscillating saw prevent heat accumulation; prolonged contact causes thermal burns even without laceration.

Question 148: Which tool is used to measure compartment pressure when acute compartment syndrome is suspected before or after casting?

Intracompartmental pressure monitor (Correct answer)
Doppler ultrasound
Pulse oximeter
Sphygmomanometer

Correct answer: Intracompartmental pressure monitor

Intracompartmental pressure monitoring (Stryker device or equivalent) directly measures pressures within fascial compartments.

Question 149: Before cast removal, what should the technician tell the patient to reduce anxiety about the saw?

The patient should not look at the saw at any time
The saw vibrates but will not cut skin if used correctly (Correct answer)
The process takes only a few seconds
The saw is completely painless and silent

Correct answer: The saw vibrates but will not cut skin if used correctly

Explaining how the oscillating saw works reassures patients and encourages cooperation, which improves safety during removal.

Question 150: Which type of fracture is suggested by a spiral pattern on X-ray in a non-ambulatory infant?

Pathologic fracture from bone tumor
Normal birth fracture pattern
Non-accidental trauma (child abuse) must be considered (Correct answer)
Stress fracture from excessive swaddling

Correct answer: Non-accidental trauma (child abuse) must be considered

Spiral fractures in non-ambulatory infants are a well-recognized radiographic red flag for non-accidental trauma and mandate a mandatory report and full skeletal survey.

Question 151: The three main functions of articular cartilage relevant to casting outcomes are load distribution, shock absorption, and which third function?

Producing synovial fluid
Transmitting nerve signals
Anchoring ligaments
Providing a low-friction gliding surface (Correct answer)

Correct answer: Providing a low-friction gliding surface

Articular hyaline cartilage distributes load, absorbs shock, and provides an ultra-low-friction surface that allows smooth joint movement.

Question 152: A child is very anxious and uncooperative during casting. The BEST approach is:

Reschedule until the child is calmer
Administer sedation before proceeding
Firmly restrain the child and complete the cast quickly
Involve the caregiver, explain each step simply, and work calmly and efficiently (Correct answer)

Correct answer: Involve the caregiver, explain each step simply, and work calmly and efficiently

Caregiver involvement, age-appropriate explanations, and a calm demeanor reduce anxiety and improve cooperation without restraint or medication.

Question 153: Which condition is a CONTRAINDICATION to circumferential casting immediately after acute injury?

Significant anticipated swelling (acute compartment risk) (Correct answer)
Buckle fracture in a pediatric patient
Chronic stress fracture of the metatarsal
Stable mid-shaft radius fracture

Correct answer: Significant anticipated swelling (acute compartment risk)

Circumferential casts applied when significant swelling is expected can compress neurovascular structures, causing compartment syndrome.

Question 154: Wolff's Law states that bone remodels in response to which stimulus?

Hormonal fluctuations
Mechanical stress applied to it (Correct answer)
Vascular supply changes
Calcium intake levels

Correct answer: Mechanical stress applied to it

Wolff's Law describes bone's adaptation to the mechanical loads placed on it, laying down more matrix along lines of stress.

Question 155: Which type of cast material is preferred when the patient requires MRI imaging during the treatment period?

Standard plaster of Paris
Fiberglass with fiberglass splints (Correct answer)
Plaster with metal reinforcement rods
Fiberglass with aluminum splints

Correct answer: Fiberglass with fiberglass splints

Fiberglass cast materials are MRI-compatible because they contain no ferromagnetic metals, making them safe in magnetic fields.

Question 156: The posterior tibial pulse in a patient with a short leg cast is best assessed by palpating:

Over the lateral malleolus
On the dorsum of the foot between the first and second metatarsals
Behind the medial malleolus (Correct answer)
At the popliteal fossa

Correct answer: Behind the medial malleolus

The posterior tibial artery passes posterior to the medial malleolus and is palpated there to assess distal perfusion of the foot.

Question 157: When casting a pregnant patient, which body position is recommended during the procedure?

Supine flat with legs extended
Left lateral tilt or left lateral decubitus to prevent aortocaval compression (Correct answer)
Prone to access posterior injuries
Seated upright in a chair

Correct answer: Left lateral tilt or left lateral decubitus to prevent aortocaval compression

After the first trimester, supine positioning can compress the inferior vena cava; a left tilt maintains cardiac output.

Question 158: The plantar aponeurosis originates from which structure and plays a key role in foot arch support?

Calcaneus (Correct answer)
Talus
Cuboid
Navicular

Correct answer: Calcaneus

The plantar fascia/aponeurosis originates from the medial tubercle of the calcaneus and supports the longitudinal arch of the foot.

Question 159: Which elements MUST be documented before a cast is applied to meet the standard of care?

The name of the ordering physician and clinic location
The patient's height and weight
Only the type of cast material used
Pre-cast neurovascular assessment (CSM), skin integrity, patient consent, and allergy history (Correct answer)

Correct answer: Pre-cast neurovascular assessment (CSM), skin integrity, patient consent, and allergy history

Pre-procedure documentation of CSM, skin status, allergies, and consent establishes a baseline and demonstrates that safety checks were performed.

Question 160: The term 'scope of practice' for an orthopedic casting technician is best defined as:

The types of insurance a technician is permitted to bill for services
The number of patients the technician can treat per shift
The geographic region in which the technician is licensed to work
The range of procedures and responsibilities the technician is legally and professionally authorized to perform (Correct answer)

Correct answer: The range of procedures and responsibilities the technician is legally and professionally authorized to perform

Scope of practice defines the legal and professional boundaries of what a certified casting technician is authorized to perform.

Question 161: If a casting technician observes signs of abuse in a pediatric patient, they are legally obligated to:

Document the findings but take no further action
Keep the suspicion confidential to protect patient privacy
Confront the caregiver directly before documenting anything
Report the suspicion to the appropriate authority per mandatory reporting laws (Correct answer)

Correct answer: Report the suspicion to the appropriate authority per mandatory reporting laws

Healthcare workers are mandatory reporters in all US states; suspected child abuse must be reported to child protective services regardless of certainty.

Question 162: What is the purpose of bivalving a cast?

To split the cast into two halves to relieve pressure or allow for swelling (Correct answer)
To reinforce the cast with additional layers
To apply a new synthetic cast over the existing one
To remove the cast entirely

Correct answer: To split the cast into two halves to relieve pressure or allow for swelling

Bivalving cuts both sides of the cast and releases the underlying padding, reducing circumferential pressure while maintaining some immobilization.

Question 163: Patient discharge instructions for cast care should be provided in which format?

Verbal only to save paper
Both verbal and written instructions (Correct answer)
Written only to save appointment time
Pictographic instructions only for universal accessibility

Correct answer: Both verbal and written instructions

Both verbal and written instructions ensure patient understanding and provide a reference the patient can consult at home.

Question 164: Which modification is typically made when casting an elderly patient with osteoporotic skin?

Omitting stockinette to reduce layers
Use of only plaster to allow custom molding
Thinner padding to keep the cast lightweight
Increased padding and lower circumferential pressure (Correct answer)

Correct answer: Increased padding and lower circumferential pressure

Elderly patients have fragile, atrophic skin prone to tearing and pressure injury, requiring extra padding and careful tensioning.

Question 165: The 'anatomical snuffbox' is bordered by the tendons of the abductor pollicis longus and extensor pollicis brevis radially and the extensor pollicis longus ulnarly; palpation tenderness here suggests fracture of which bone?

Lunate
Capitate
Trapezium
Scaphoid (Correct answer)

Correct answer: Scaphoid

Tenderness in the anatomical snuffbox is the classic clinical sign of a scaphoid fracture even when initial X-rays appear normal.

Orthopaedic Technologist Certified (OTC) Examination

The OTC exam certifies orthopaedic technologists in patient assessment, casting and splinting techniques, surgical procedures, and clinic management. It is administered by the National Board for Certification of Orthopaedic Technologists (NBCOT).

165

Questions

180 min

Time Limit

70%

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