Orthopaedic Technologist Certified (OTC) Examination — Questions and Answers

Question 1: Edema assessment before casting is BEST performed by:

Reviewing the X-ray for soft tissue shadow
Asking the patient if the extremity feels swollen
Pressing the skin and observing for pitting
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 2: How does an oscillating cast saw avoid cutting the patient's skin?

Its blade is coated with a protective plastic layer
The blade automatically stops when it contacts skin
It vibrates rapidly but does not rotate, cutting rigid material but bouncing off soft tissue (Correct answer)
It uses suction to pull the cast away from the 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 3: Which color-coded system is used to guide padding at vulnerable areas in pediatric casts?

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

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 4: Which standard precaution applies to all patient interactions?

Use PPE only if infection is confirmed
Double glove for all procedures
Treat all body fluids as potentially infectious (Correct answer)
Only isolate contagious patients

Correct answer: Treat all body fluids as potentially infectious

Standard precautions are a set of infection control practices where all human blood, body fluids, secretions, excretions (except sweat), non-intact skin, and mucous membranes are treated as potentially infectious. This universal approach applies to all patient interactions, regardless of their diagnosis, to prevent the transmission of infectious agents and protect both patients and healthcare workers.

Question 5: Why is it important to use gloves when handling casting material?

To improve grip strength
To shape the cast faster
To avoid staining the cast
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 6: What position should a patient's extremity be in during pre-cast neurovascular assessment?

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

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 7: Which information is REQUIRED to be included on every cast application record?

The patient's diagnosis and surgical history
Date, time, type of cast, materials used, neurovascular status, and technician name (Correct answer)
Only the cast type and date
Patient's insurance information and billing codes only

Correct answer: Date, time, type of cast, materials used, neurovascular status, and technician name

A complete cast record includes procedure details, materials, neurovascular findings, and technician identification to ensure accountability and continuity of care.

Question 8: Which fracture results from repetitive loading rather than acute trauma?

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

Correct answer: Stress fracture

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

Question 9: A patient reports a burning sensation under the cast just before scheduled removal. The correct response is:

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

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

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

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 11: A scaphoid fracture is typically immobilized in which cast?

Ulnar gutter splint
Short arm cast
Thumb spica cast (Correct answer)
Long arm cast

Correct answer: Thumb spica cast

Thumb spica immobilization includes the thumb and wrist to protect the scaphoid's tenuous blood supply and prevent non-union.

Question 12: A patient has a known latex allergy. The casting technician should use:

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

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 13: A casting record that is incomplete or falsified could result in:

Loss of the patient's insurance coverage
A requirement to retake the OCC examination
Only a verbal warning from the supervising clinician
Professional discipline, civil liability, and potential criminal charges (Correct answer)

Correct answer: Professional discipline, civil liability, and potential criminal charges

Falsifying or omitting medical records constitutes fraud and negligence, with serious legal and professional consequences.

Question 14: 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
Pressure injury that the patient cannot feel or report (Correct answer)
Autonomic dysreflexia triggered by the cast saw

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

Fiberglass
Resin
Plastic
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 16: When removing a cast, the saw should be moved in which pattern?

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

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

Hemostat
Kelly forceps
Cast spreader (Correct answer)
Bandage scissors

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

Minor skin abrasion at the injury site
Mild soft tissue swelling
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 19: When caring for a patient with dementia in a cast, which instruction to caregivers is MOST critical?

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

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

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

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 21: 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 22: Which of the following is a critical first step in cast application?

Shaping the cast edges
Choosing cast color
Applying padding over bony prominences (Correct answer)
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 23: Why is elevation recommended immediately after cast placement?

To reduce swelling and promote circulation (Correct answer)
To ease mobility
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 24: The Ottawa Ankle Rules help clinicians determine:

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

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 25: Which joint is classified as a hinge joint?

Wrist
Hip
Shoulder
Elbow (Correct answer)

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

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

Correct answer: Intracompartmental pressure monitor

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

Question 27: 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 28: When casting a child with an upper extremity fracture, the wrist is typically positioned in:

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

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 29: Which symptom listed in discharge instructions should prompt the patient to seek IMMEDIATE care?

Some discomfort at the fracture site with movement
Increasing pain, numbness, or tingling in the casted extremity (Correct answer)
Mild itching under the cast after the first day
Slight cast odor after two weeks

Correct answer: Increasing pain, numbness, or tingling in the casted extremity

Worsening pain, numbness, or tingling are warning signs of neurovascular compromise that require urgent evaluation.

Question 30: What is the correct instruction for skin care immediately after cast removal?

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

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.

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).

Questions

35 min

Time Limit

70%

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