Certified Seating and Mobility Specialist (SMS) Exam — Questions and Answers

Question 1: A suboccipital headrest is indicated for clients who need support primarily at the:

Thoracic spine
Mid-cervical spine
Base of the skull
Occiput and upper cervical region (Correct answer)

Correct answer: Occiput and upper cervical region

Suboccipital headrests contact the base of the skull (occiput) and upper cervical region to support head position.

Question 2: When measuring for hand rim diameter on a manual wheelchair, the goal is to:

Match the rim diameter to the client's hand size
Position the rim so the client's elbow is at 100–120 degrees when the hand is at the top of the rim (Correct answer)
Match the rim to the wheel diameter exactly
Select the largest possible rim for maximum leverage

Correct answer: Position the rim so the client's elbow is at 100–120 degrees when the hand is at the top of the rim

Optimal hand rim position places the elbow at 100–120 degrees when the hand contacts the top of the rim, maximizing propulsion efficiency and reducing shoulder strain.

Question 3: When a client's needs exceed the SMS professional's scope of practice or expertise, the ethical obligation is to:

Defer to the physician's decision only
Proceed anyway to avoid delaying care
Document the limitation and continue without referral
Refer to or consult with a more qualified professional (Correct answer)

Correct answer: Refer to or consult with a more qualified professional

When a case exceeds the professional's competence, ethical practice requires referral or consultation with someone who has the necessary expertise.

Question 4: A client with ALS who is losing upper extremity strength is being evaluated for power wheelchair access. Which access method should be considered as disease progresses?

Standard joystick permanently
Foot control only
Proportional mini joystick initially, with a plan for alternative access (head array, sip-and-puff) as function declines (Correct answer)
Head array from the start regardless of current function

Correct answer: Proportional mini joystick initially, with a plan for alternative access (head array, sip-and-puff) as function declines

As ALS progresses, access methods must evolve with the client's changing function, starting with the least restrictive option and planning ahead for alternative access as upper extremity function declines.

Question 5: Why is it important to reassess client needs periodically after equipment delivery?

To order optional colors
To renew warranties
To confirm continued equipment suitability (Correct answer)
To replace vendor logos

Correct answer: To confirm continued equipment suitability

A client's physical condition, functional abilities, and environment can change over time. Periodic reassessments ensure that the provided equipment remains appropriate, safe, and effective. This allows for timely adjustments or recommendations for new equipment if needs have evolved, confirming continued equipment suitability.

Question 6: A seating specialist evaluating a client with Friedreich's ataxia should prioritize which intervention for the PRIMARY trunk control challenge?

Tilt-in-space to prevent forward falls
Anti-tip devices for rear stability
Rigid seat insert to improve proprioceptive feedback
Lateral trunk supports to manage trunk ataxia and improve midline stability (Correct answer)

Correct answer: Lateral trunk supports to manage trunk ataxia and improve midline stability

Friedreich's ataxia produces progressive cerebellar ataxia with trunk instability in multiple planes; lateral trunk supports address the characteristic oscillatory trunk movement.

Question 7: What is one reason to involve the entire clinical team in the equipment selection process?

To reduce appointment time
To ensure all client needs are addressed (Correct answer)
To simplify billing
To test new equipment brands

Correct answer: To ensure all client needs are addressed

Involving a multidisciplinary clinical team (e.g., physician, therapist, supplier) brings diverse perspectives and expertise to the equipment selection process. This collaborative approach ensures that all aspects of the client's physical, cognitive, social, and environmental needs are thoroughly considered, leading to the most appropriate and comprehensive solution.

Question 8: Which term describes a pelvis that has rotated forward so one side is more anterior than the other in the horizontal plane?

Posterior pelvic tilt
Anterior pelvic tilt
Pelvic obliquity
Pelvic rotation (Correct answer)

Correct answer: Pelvic rotation

Pelvic rotation refers to horizontal plane rotation where one iliac crest is more anterior than the other.

Question 9: What does an ASIA Impairment Scale grade 'A' indicate in a client with spinal cord injury?

Incomplete injury with some motor function preserved below the level
Complete injury with no sensory or motor function below the neurological level (Correct answer)
Normal neurological function with minor deficits
Incomplete injury with sensory function only below the level

Correct answer: Complete injury with no sensory or motor function below the neurological level

ASIA grade A indicates a complete SCI with absolutely no motor or sensory function preserved in the sacral segments S4–S5.

Question 10: Which feature is recommended for clients requiring postural support and frequent repositioning?

Pneumatic tires
Removable armrests
Tilt-in-space frame (Correct answer)
Folding frame

Correct answer: Tilt-in-space frame

A tilt-in-space frame allows the entire seating system to pivot backward, changing the user's orientation in space while maintaining their hip and knee angles. This feature is excellent for pressure relief, managing muscle tone, and facilitating frequent repositioning without shear. It is ideal for clients requiring significant postural support and regular changes in position.

Question 11: Orthostatic hypotension is MOST commonly a seating and positioning concern for clients with which condition?

High-level spinal cord injury (T6 and above) (Correct answer)
Relapsing-remitting multiple sclerosis
Post-stroke hemiplegia
Cerebral palsy (spastic diplegia)

Correct answer: High-level spinal cord injury (T6 and above)

High-level SCI disrupts the sympathetic nervous system's ability to regulate blood pressure, making orthostatic hypotension a significant risk when transitioning to upright positioning.

Question 12: What does 'Complex Rehab Technology' (CRT) refer to?

Powered scooters for community mobility
Any wheelchair covered by Medicare
Individually configured devices requiring clinical evaluation, such as custom manual and power wheelchairs for people with complex disabilities (Correct answer)
Hospital-issued standard wheelchairs

Correct answer: Individually configured devices requiring clinical evaluation, such as custom manual and power wheelchairs for people with complex disabilities

CRT refers to individually configured, medically necessary assistive technology requiring clinical evaluation by professionals with specialized expertise, for individuals with complex, long-term disabilities.

Question 13: Which seating system feature is most appropriate for a client with high tone who frequently extends into extensor patterns?

Firm flat cushion
Anterior trunk support and tilt-in-space (Correct answer)
90-degree back angle
Elevated leg rests

Correct answer: Anterior trunk support and tilt-in-space

Tilt-in-space combined with anterior trunk support can inhibit extensor tone and maintain positioning for high-tone clients.

Question 14: Which seated posture is MOST characteristic of a client with Parkinson's disease?

Anterior pelvic tilt with exaggerated lumbar lordosis
Lateral trunk lean with fixed scoliosis
Neutral pelvic alignment with flat thoracic spine
Posterior pelvic tilt with thoracic kyphosis and forward head position (Correct answer)

Correct answer: Posterior pelvic tilt with thoracic kyphosis and forward head position

Rigidity and bradykinesia in Parkinson's disease produce a characteristic flexed, stooped posture manifesting as posterior pelvic tilt, thoracic kyphosis, and forward head when seated.

Question 15: Which power wheelchair drive configuration provides the tightest turning radius?

All-wheel drive
Front-wheel drive
Mid-wheel drive (Correct answer)
Rear-wheel drive

Correct answer: Mid-wheel drive

Mid-wheel drive power wheelchairs have the drive wheels under the user's center of gravity, enabling a very tight turning radius ideal for indoor navigation.

Question 16: Which medical condition creates the HIGHEST combined risk for seating-related pressure injury due to simultaneous sensory impairment AND vascular compromise?

Multiple sclerosis with heat sensitivity
Parkinson's disease with rigidity
Rheumatoid arthritis with joint deformity
Diabetes mellitus with peripheral neuropathy (Correct answer)

Correct answer: Diabetes mellitus with peripheral neuropathy

Peripheral neuropathy in diabetes eliminates protective sensation while diabetic vasculopathy impairs tissue perfusion, creating a dual-mechanism risk for pressure injury that exceeds other conditions listed.

Question 17: Which postural support is commonly used to control lateral trunk lean?

Headrest
Lateral thoracic supports (Correct answer)
Pelvic belt
Lap tray

Correct answer: Lateral thoracic supports

Lateral thoracic supports are specifically designed to provide external support to the sides of the trunk. They help to counteract forces that cause leaning, maintaining midline posture and preventing postural deviations like scoliosis. This targeted support is crucial for controlling lateral trunk lean.

Question 18: Which type of wheelchair is best for a highly active user with good upper body strength?

Tilt-in-space chair
Power wheelchair
Rigid frame wheelchair (Correct answer)
Geri-chair recliner

Correct answer: Rigid frame wheelchair

Rigid frame wheelchairs are known for their lightweight design and energy efficiency due to fewer moving parts and direct power transfer. This makes them highly responsive and easier to propel, which is ideal for active users with good upper body strength. They prioritize performance and maneuverability for independent propulsion.

Question 19: The concept of 'wheelchair skills training' includes which of the following techniques?

How to clean and maintain the wheelchair only
How to order replacement parts
Cognitive training for wheelchair decision making
Propulsion techniques, curb negotiation, wheelies, and ramp navigation (Correct answer)

Correct answer: Propulsion techniques, curb negotiation, wheelies, and ramp navigation

Wheelchair skills training encompasses functional skills such as propulsion efficiency, curb negotiation, wheelie performance, and ramp and obstacle navigation.

Question 20: What is the purpose of a follow-up appointment after equipment delivery?

Deliver new invoices
Update vendor catalogs
Collect unused parts
Ensure equipment meets user needs and adjust as needed (Correct answer)

Correct answer: Ensure equipment meets user needs and adjust as needed

A follow-up appointment allows the clinician to assess how the client is adapting to the new equipment in their daily life. It provides an opportunity to make any necessary adjustments, address emerging issues, and confirm that the equipment continues to effectively meet the client's evolving needs and goals. This ensures ongoing suitability and satisfaction.

Question 21: Under Medicare, which category covers manual and power wheelchairs as Durable Medical Equipment?

Part B (Correct answer)
Part C (Medicare Advantage only)
Part A
Part D

Correct answer: Part B

Medicare Part B covers Durable Medical Equipment, including manual and power wheelchairs, when medically necessary.

Question 22: Which adjustment improves pressure relief and reduces risk of skin breakdown?

Accessory mounting
Cup holder placement
Seat tilt adjustment (Correct answer)
Frame color customization

Correct answer: Seat tilt adjustment

Seat tilt adjustment, or tilt-in-space, allows the entire seating system to recline while maintaining the user's hip and knee angles. This action redistributes pressure from the buttocks to the back, reducing peak pressure points and improving circulation. This pressure redistribution is vital for preventing skin breakdown and pressure injuries.

Question 23: What is the primary goal of a seating intervention for a client with progressive neurological disease?

Maximize cushion thickness
Prevent wheelchair use
Optimize function and minimize deformity (Correct answer)
Eliminate all movement

Correct answer: Optimize function and minimize deformity

Seating interventions aim to optimize remaining function while minimizing secondary deformities.

Question 24: A child with myelomeningocele at the L4 level would MOST likely have which functional lower extremity ability?

Full lower extremity strength and normal gait
No lower extremity movement; complete flaccid paralysis
Knee extension via intact quadriceps with potential for AFO-assisted ambulation (Correct answer)
Hip flexion only with no distal control

Correct answer: Knee extension via intact quadriceps with potential for AFO-assisted ambulation

The L4 myotome includes tibialis anterior and quadriceps; preservation of these muscles allows knee extension and potential for household or limited community ambulation with AFOs.

Question 25: The ATP credential (Assistive Technology Professional) is awarded by which organization?

RESNA (Rehabilitation Engineering and Assistive Technology Society of North America) (Correct answer)
NRRTS
AOTA
CMS

Correct answer: RESNA (Rehabilitation Engineering and Assistive Technology Society of North America)

RESNA awards the ATP credential to professionals who demonstrate competence in the provision of assistive technology, including seating and mobility.

Question 26: A client using a tilt-in-space system for pressure relief should tilt to at least how many degrees to achieve meaningful pressure redistribution?

45+ degrees only
15–25 degrees (typically 30+ for significant relief) (Correct answer)
5–10 degrees
10–15 degrees

Correct answer: 15–25 degrees (typically 30+ for significant relief)

Research indicates that tilt angles of at least 15–25 degrees are needed for meaningful pressure redistribution, with 30 degrees or more providing significant relief at the ischials.

Question 27: Which factor should always be considered when selecting mobility equipment?

Client’s favorite color
Local weather only
Amount of insurance coverage
User environment and terrain (Correct answer)

Correct answer: User environment and terrain

The user environment and terrain should always be considered when selecting mobility equipment. Factors such as the client's home layout, workplace accessibility, and common outdoor surfaces dictate the necessary features like wheel type, turning radius, and overall durability. This ensures the equipment is practical and functional for their daily life.

Question 28: Pelvic obliquity in sitting is best described as:

Excessive lateral hip rotation
Forward tilting of the pelvis
One side of the pelvis higher than the other (Correct answer)
Backward rotation of both iliac crests

Correct answer: One side of the pelvis higher than the other

Pelvic obliquity is a lateral tilt of the pelvis where one iliac crest is higher than the other in the frontal plane.

Question 29: Which of the following best describes the role of the ATP in the funding process for complex rehab technology (CRT)?

The ATP performs the evaluation, documents functional need, and recommends appropriate equipment to support the physician's order (Correct answer)
The ATP is responsible for billing the payer directly
The ATP prescribes the equipment and signs the order
The ATP approves prior authorization requests

Correct answer: The ATP performs the evaluation, documents functional need, and recommends appropriate equipment to support the physician's order

The ATP (Assistive Technology Professional) evaluates the client, documents their needs and functional abilities, and recommends appropriate equipment, which the physician then prescribes.

Question 30: A 'Certificate of Medical Necessity' (CMN) is most associated with which type of DME?

Orthotics
Oxygen equipment (Correct answer)
Power wheelchairs
Prosthetic limbs

Correct answer: Oxygen equipment

CMNs are specifically required for oxygen and certain other DME categories; power wheelchairs use a written order and detailed documentation rather than a CMN form.

Question 31: Moisture from incontinence increases the risk of pressure injury development primarily by:

Cooling the skin and reducing blood flow
Increasing tissue oxygen levels
Softening the skin (maceration) and increasing friction and shear susceptibility (Correct answer)
Reducing the effect of pressure on the skin

Correct answer: Softening the skin (maceration) and increasing friction and shear susceptibility

Moisture from incontinence causes maceration of the skin, making it more susceptible to friction, shear, and breakdown under pressure.

Question 32: Which measurement is critical when prescribing a wheelchair?

Seat width (Correct answer)
Shoe size
Foot length
Nose-to-chin length

Correct answer: Seat width

Seat width is a critical measurement when prescribing a wheelchair. Proper seat width ensures comfort, prevents pressure points, and allows for effective propulsion. If too narrow, it can cause skin irritation; if too wide, it can lead to poor posture and difficulty maneuvering.

Question 33: Flexible versus fixed postural deformities are distinguished during assessment because:

Only fixed deformities affect pressure distribution
Flexible deformities always worsen without intervention
Fixed deformities require surgery before seating
Flexible deformities can be corrected by the seating system while fixed deformities must be accommodated (Correct answer)

Correct answer: Flexible deformities can be corrected by the seating system while fixed deformities must be accommodated

Flexible deformities can often be corrected or reduced through seating supports, while fixed deformities must be accommodated to avoid causing pain or skin breakdown.

Question 34: The 'lap belt' on a wheelchair is classified as:

A postural support that provides pelvic positioning
Both a safety restraint and a postural support depending on its angle and placement (Correct answer)
A pressure injury prevention device
A fall prevention device only, not a positioning aid

Correct answer: Both a safety restraint and a postural support depending on its angle and placement

A lap belt serves dual purposes: as a safety restraint preventing forward ejection and as a postural support maintaining pelvic position when properly angled at 45 degrees to the seating surface.

Question 35: In the context of power wheelchair joystick programming, 'tremor dampening' is a feature that:

Increases the sensitivity of the joystick
Slows the maximum speed of the chair
Reduces battery consumption
Filters out small involuntary movements to prevent unintended direction changes (Correct answer)

Correct answer: Filters out small involuntary movements to prevent unintended direction changes

Tremor dampening filters out small unintended joystick movements caused by tremor, allowing the intended movements to control the chair while ignoring involuntary micro-movements.

Question 36: What does 'medical necessity' mean in the context of seating and mobility documentation?

The device is needed to treat or ameliorate the patient's condition and improve function (Correct answer)
The device has been prescribed by a physician
The device is on the Medicare approved supplier list
The device is the least expensive option available

Correct answer: The device is needed to treat or ameliorate the patient's condition and improve function

Medical necessity means the device is reasonably necessary to treat or manage the patient's condition and improve their functional ability.

Question 37: What is the primary goal of a seating and mobility client evaluation?

Limit client activity
Match mobility and postural needs to equipment (Correct answer)
Select the most expensive device
Choose lightweight frames only

Correct answer: Match mobility and postural needs to equipment

The primary goal of a seating and mobility client evaluation is to match mobility and postural needs to appropriate equipment. This comprehensive assessment considers the client's functional abilities, physical limitations, and lifestyle to select a system that optimizes their independence, comfort, and overall health.

Question 38: What is a common reason for reassessing a client’s seating and mobility system?

Medical condition changes or discomfort (Correct answer)
Holiday travel
Desire for a color change
New home address

Correct answer: Medical condition changes or discomfort

A common reason for reassessing a client’s seating and mobility system is medical condition changes or discomfort. As a client's health, functional abilities, or body shape evolve, their existing equipment may no longer provide optimal support or pressure relief. Regular reassessments ensure the system continues to meet their changing needs and prevent complications.

Question 39: A Detailed Product Description (DPD) in a wheelchair claim is typically provided by:

The prescribing physician
The ATP or treating therapist
The insurance case manager
The DMEPOS supplier (Correct answer)

Correct answer: The DMEPOS supplier

The DMEPOS (Durable Medical Equipment, Prosthetics, Orthotics, and Supplies) supplier provides the Detailed Product Description outlining the specific device and components being billed.

Question 40: What is typically the first step in the service delivery process for mobility equipment?

User training
Billing approval
Client assessment (Correct answer)
Equipment fitting

Correct answer: Client assessment

The service delivery process begins with a comprehensive client assessment to understand their medical condition, functional abilities, environmental needs, and personal goals. This initial step is crucial for accurately identifying appropriate equipment and developing an individualized plan that truly meets the client's unique requirements.

Question 41: HCPCS stands for:

Healthcare Common Procedure Coding System (Correct answer)
Hospital Claim Processing and Coding Schedule
Health Care Procedure Coding System
Health Coverage Procurement and Cost Schedule

Correct answer: Healthcare Common Procedure Coding System

HCPCS (Healthcare Common Procedure Coding System) is the coding system used to bill Medicare and other payers for DME including wheelchairs.

Question 42: Maintenance responsibility for a complex rehabilitation technology device after delivery typically belongs to:

The ATP who evaluated the client
The insurance company that funded the device
The DMEPOS supplier for warranty issues; client and caregiver for routine maintenance (Correct answer)
The client's physician

Correct answer: The DMEPOS supplier for warranty issues; client and caregiver for routine maintenance

The DMEPOS supplier is responsible for warranty repairs and technical service, while the client and caregivers are responsible for routine maintenance such as charging batteries and cleaning.

Question 43: Medicaid coverage for seating and mobility equipment in the US is primarily determined by:

Each state's individual Medicaid program, which can vary significantly (Correct answer)
Federal CMS rules that are identical in every state
The DMEPOS supplier's contract with CMS
Medicare LCD policies that Medicaid must follow

Correct answer: Each state's individual Medicaid program, which can vary significantly

Medicaid is a joint federal-state program, and each state sets its own coverage policies, so coverage for seating and mobility equipment varies by state.

Question 44: Shear forces in seating contribute to pressure injury development primarily by:

Stretching the skin surface without affecting underlying tissue
Increasing blood flow to the skin surface
Causing tissue deformation and disrupting microcirculation in deeper tissues (Correct answer)
Reducing moisture on the skin surface

Correct answer: Causing tissue deformation and disrupting microcirculation in deeper tissues

Shear forces cause mechanical deformation of deeper tissues, disrupting microcirculation and accelerating ischemia even at lower interface pressures.

Question 45: A follow-up assessment after wheelchair delivery is important primarily to:

Complete paperwork for the insurance file
Generate additional billing
Verify device fit, function, and usage, identify problems, and make adjustments (Correct answer)
Confirm delivery was made by the supplier

Correct answer: Verify device fit, function, and usage, identify problems, and make adjustments

Follow-up assessment ensures the device is performing as intended in the client's real-world environment, identifies issues, and allows for timely adjustments to optimize outcomes.

Question 46: The term 'immersion' in cushion selection refers to:

How well the cushion holds its shape over time
The degree to which a cushion absorbs moisture
Submerging the cushion in water to test it
How deeply the bony prominences sink into the cushion material (Correct answer)

Correct answer: How deeply the bony prominences sink into the cushion material

Immersion is the depth to which the body sinks into the cushion, which increases the surface area in contact with the cushion and reduces peak pressures.

Question 47: Which HCPCS code group (E1xxx) is used for power wheelchairs?

E0950–E0999
E0100–E0199
E1200–E1298
K0001–K0900 (Correct answer)

Correct answer: K0001–K0900

Power wheelchairs are coded using K-codes (K0800–K0900 range), while manual wheelchairs primarily use K0001–K0108 and E-codes for accessories.

Question 48: Which accessory improves safety when transferring into and out of a wheelchair?

High-back headrest
Decorative wheel spokes
Rigid foot platform
Swing-away footrests (Correct answer)

Correct answer: Swing-away footrests

Swing-away footrests can be moved out of the way or removed entirely, clearing the space in front of the wheelchair. This provides an unobstructed path for the user's feet during transfers, significantly reducing the risk of tripping or entanglement. This feature greatly improves safety and ease during transfers.

Question 49: A client with a C6 complete spinal cord injury typically has preserved function in which muscle group?

Full grasp and release function
Finger flexors and intrinsic hand muscles
Elbow extensors (triceps)
Wrist extensors (ECRL/ECRB) (Correct answer)

Correct answer: Wrist extensors (ECRL/ECRB)

The C6 myotome includes wrist extensors, which are critical for tenodesis grasp function and manual wheelchair propulsion with adaptations.

Question 50: Which seating system feature helps reduce shear forces on the skin during recline?

Hard armrests
Rigid footrests
Elevating leg rests
Center-of-rotation recline that pivots at the hip joint (Correct answer)

Correct answer: Center-of-rotation recline that pivots at the hip joint

A recline system with a center of rotation at the hip joint minimizes shear by matching the chair's pivot to the body's natural pivot, reducing relative movement between the client and the seat back.

Question 51: A sip-and-puff controller for a power wheelchair uses which input modality?

Finger pressure on a capacitive surface
Eye gaze tracking
Pneumatic pressure and vacuum created by sipping or puffing into a straw (Correct answer)
Head position tracking via gyroscope

Correct answer: Pneumatic pressure and vacuum created by sipping or puffing into a straw

Sip-and-puff controllers use pneumatic input — the user sips (inhales) or puffs (exhales) into a straw-like tube to generate commands for directional control.

Question 52: A client with a T4 complete SCI is at risk for autonomic dysreflexia. Which seating-related trigger must be vigilantly monitored?

Noxious stimuli from ill-fitting equipment causing undetected skin irritation or pressure below the injury level (Correct answer)
Wheelchair cushion being too firm for comfort
Seat pan width being slightly too wide
Backrest height being set too high

Correct answer: Noxious stimuli from ill-fitting equipment causing undetected skin irritation or pressure below the injury level

Autonomic dysreflexia in injuries at or above T6 is triggered by noxious stimuli below the lesion that the client cannot feel, including pressure from poorly fitted seating or leg rests.

Question 53: Which component secures the pelvis and maintains proper posture in a wheelchair?

Seat upholstery
Armrest pad
Chest strap
Pelvic belt (Correct answer)

Correct answer: Pelvic belt

A pelvic belt is positioned across the user's pelvis to secure it firmly against the backrest of the wheelchair. This prevents the user from sliding forward (sacral sitting) and helps maintain a stable, upright posture. Proper pelvic positioning is fundamental for overall seating stability and effective posture.

Question 54: Which measurement determines the appropriate seat depth for a wheelchair user?

Distance from the back of the knee to the heel
Sitting height from seat to top of head
Distance from the back of the buttock to the back of the knee minus 1-2 inches (Correct answer)
Width across the greater trochanters

Correct answer: Distance from the back of the buttock to the back of the knee minus 1-2 inches

Seat depth equals the measurement from the back of the buttock to the popliteal fossa minus 1-2 inches to prevent pressure behind the knee.

Question 55: The SMS (Seating and Mobility Specialist) credential is awarded by:

CMS
RESNA
NRRTS (National Registry of Rehabilitation Technology Suppliers) (Correct answer)
APTA

Correct answer: NRRTS (National Registry of Rehabilitation Technology Suppliers)

NRRTS awards the SMS (Seating and Mobility Specialist) credential to rehabilitation technology suppliers who demonstrate competency in seating and mobility.

Question 56: What is the primary purpose of a pommel or medial knee block in seating?

Prevent forward sliding
Reduce pressure under the ischial tuberosities
Provide footrest support
Reduce hip adduction and internal rotation (Correct answer)

Correct answer: Reduce hip adduction and internal rotation

A pommel or medial knee block is placed between the knees to prevent excessive hip adduction and internal rotation.

Question 57: Which document formally authorizes equipment funding approval from an insurance provider?

Price quote
Product brochure
Letter of medical necessity (Correct answer)
Purchase receipt

Correct answer: Letter of medical necessity

A Letter of Medical Necessity (LMN) is a crucial document written by a healthcare professional that details the client's medical condition, functional limitations, and how the requested equipment is medically necessary to address these needs. It serves as the primary justification for insurance funding approval, formally authorizing the equipment.

Question 58: Which factor is most important when selecting cushion material for pressure management?

Transport speed
Frame color match
Bag holder size
User’s skin integrity and posture needs (Correct answer)

Correct answer: User’s skin integrity and posture needs

The selection of cushion material is paramount for effective pressure management and postural stability. Different materials (e.g., foam, gel, air) offer varying levels of pressure redistribution and support. These properties must be carefully matched to the user's specific risk for skin breakdown and their unique postural requirements to ensure comfort and prevent injury.

Question 59: The Wheelchair Assessment Form required by many payers should document which of the following to justify a Group 3 power wheelchair?

The supplier's service history for similar devices
The client's inability to self-propel a manual wheelchair and need for a complex power drive system (Correct answer)
The client's insurance plan type and deductible
The client's age and weight only

Correct answer: The client's inability to self-propel a manual wheelchair and need for a complex power drive system

Group 3 power wheelchair justification requires documenting that the client cannot self-propel a manual chair and needs the specialized features of a Group 3 device.

Question 60: A teenager with Duchenne muscular dystrophy (DMD) transitions to full-time wheelchair use. Which postural complication is MOST commonly observed?

Hip extension contractures limiting seating tolerance
Progressive thoracic scoliosis with pelvic obliquity due to trunk muscle weakness (Correct answer)
Excessive lumbar lordosis and anterior pelvic tilt
Cervical kyphosis and forward head posture

Correct answer: Progressive thoracic scoliosis with pelvic obliquity due to trunk muscle weakness

Loss of ambulation in DMD removes the spine-straightening effect of weight-bearing, and progressive trunk muscle weakness leads to scoliosis with pelvic obliquity.

Question 61: Why is postural alignment important during a mobility evaluation?

Makes mobility slower
Prevents contractures and supports function (Correct answer)
Adds visual appeal
Improves clothing fit

Correct answer: Prevents contractures and supports function

Postural alignment is important during a mobility evaluation because it prevents contractures and supports function. Proper alignment in a seating system minimizes the risk of deformities, reduces pressure points, and optimizes the client's ability to breathe, eat, and engage with their environment effectively and comfortably.

Question 62: Which seating feature helps prevent pressure injuries for high-risk clients?

Plastic seat pan
Fixed seat upholstery
Pressure-relieving cushion (Correct answer)
Standard vinyl cover

Correct answer: Pressure-relieving cushion

Pressure-relieving cushions are specifically engineered with materials and designs (e.g., air cells, gel, contoured foam) to distribute pressure evenly across the seating surface. This reduces localized pressure points, which are the primary cause of pressure injuries. For high-risk clients, this feature is essential for preventing skin breakdown.

Question 63: Which muscle group tightness most commonly contributes to anterior pelvic tilt in sitting?

Plantarflexors
Hamstrings
Hip abductors
Hip flexors (Correct answer)

Correct answer: Hip flexors

Tight hip flexors pull the pelvis anteriorly, causing anterior pelvic tilt and excessive lumbar lordosis.

Question 64: A 'deep tissue pressure injury' (DTPI) in wheelchair users most commonly occurs over which anatomical area?

Greater trochanters
Medial malleoli
Ischial tuberosities (Correct answer)
Sacrum

Correct answer: Ischial tuberosities

The ischial tuberosities bear the greatest pressure during sitting, making them the most common site for deep tissue pressure injuries in wheelchair users.

Question 65: What is the primary purpose of a wheelchair seating system?

Improve cosmetic appearance
Increase hospital visits
Provide postural support and pressure management (Correct answer)
Speed up transportation time

Correct answer: Provide postural support and pressure management

The primary purpose of a wheelchair seating system is to provide postural support and pressure management. It ensures proper body alignment, prevents deformities, and distributes pressure evenly to minimize the risk of skin breakdown. This comprehensive support enhances comfort, function, and overall health for the user.

Question 66: According to the National Pressure Injury Advisory Panel (NPIAP), a Stage 2 pressure injury is characterized by:

Full-thickness tissue loss with exposed bone, tendon, or muscle
Full-thickness skin loss with visible fat
Partial-thickness skin loss with exposed dermis (Correct answer)
Intact skin with non-blanchable erythema

Correct answer: Partial-thickness skin loss with exposed dermis

Stage 2 pressure injuries involve partial-thickness skin loss with exposed dermis; the wound bed is pink or red and moist.

Question 67: What is 'competitive bidding' as it applies to DMEPOS suppliers?

Insurance companies bidding for Medicare contracts
A process where manufacturers compete to be included on Medicare's approved device list
A CMS program where suppliers in certain areas bid for the right to supply specific DME categories, with CMS setting reimbursement rates based on bids (Correct answer)
Suppliers compete to offer the lowest price to individual clients

Correct answer: A CMS program where suppliers in certain areas bid for the right to supply specific DME categories, with CMS setting reimbursement rates based on bids

CMS's DMEPOS Competitive Bidding Program establishes contract suppliers in designated geographic areas, with reimbursement rates set based on submitted bids.

Question 68: Why is trial equipment often used during the service delivery process?

To test new products
To ensure optimal equipment fit and function (Correct answer)
To increase delivery delays
To document warehouse inventory

Correct answer: To ensure optimal equipment fit and function

Trial equipment allows the client to experience and evaluate different options in their own environment before final selection. This hands-on testing ensures the chosen equipment provides the best fit, comfort, and functional benefits. It minimizes the risk of dissatisfaction or inappropriate provision, leading to optimal outcomes.

Question 69: Which spasticity pattern most commonly produces a windswept hip deformity in children with cerebral palsy?

Isolated bilateral hip flexor spasticity
Symmetric hip extensor spasticity
Symmetric hip adductor spasticity pulling both hips inward
Asymmetric tone pulling one hip into adduction and the opposite into abduction (Correct answer)

Correct answer: Asymmetric tone pulling one hip into adduction and the opposite into abduction

Windswept deformity results from asymmetric tone that forces both hips in opposite directions simultaneously, creating the characteristic 'swept' appearance.

Question 70: Which cushion feature is most important for a client with a history of ischial pressure injuries who spends 10+ hours per day in the wheelchair?

Waterproof cover only
High pressure redistribution with immersion and envelopment properties (Correct answer)
Firm base for postural stability
Lightweight construction

Correct answer: High pressure redistribution with immersion and envelopment properties

Long sitting durations require cushions with high immersion and envelopment to maximize pressure redistribution across the entire seating surface.

Question 71: A foam cushion loses its pressure-relieving properties over time primarily due to:

Changes in the client's weight
Increase in foam density
Exposure to ultraviolet light
Foam fatigue and compression set, reducing its ability to rebound (Correct answer)

Correct answer: Foam fatigue and compression set, reducing its ability to rebound

Foam undergoes compression set over time, where it no longer fully rebounds, reducing its ability to redistribute pressure effectively.

Question 72: Which of the following is required documentation for Medicare to cover a power wheelchair?

A home assessment completed by the supplier
A trial period of at least 30 days in a standard wheelchair
Physical therapy discharge summary
A face-to-face examination by the treating physician or NPP within 6 months prior to the written order (Correct answer)

Correct answer: A face-to-face examination by the treating physician or NPP within 6 months prior to the written order

Medicare requires a face-to-face examination by the treating physician or non-physician practitioner (NPP) within 6 months before the written order for a power wheelchair.

Question 73: When performing a push-up pressure relief in a manual wheelchair, the client typically:

Tilts the chair backward
Leans forward over the lap tray
Reclines the chair back fully
Extends the elbows to lift the buttocks off the seat surface (Correct answer)

Correct answer: Extends the elbows to lift the buttocks off the seat surface

A push-up pressure relief involves the client placing hands on the armrests or wheels and extending the elbows to lift the body off the seat, relieving ischial pressure.

Question 74: A 'K-level' classification in lower extremity prosthetics is analogous to which concept in wheelchair funding?

HCPCS code
Coverage determination letter
CMS competitive bidding area
Functional level matching device capability to patient ability (Correct answer)

Correct answer: Functional level matching device capability to patient ability

K-levels classify functional ability to match prosthetic components to patient capability, similar to how wheelchair complexity codes are matched to functional mobility levels.

Question 75: Following a left CVA resulting in right hemiplegia, which seating intervention is MOST critical for the affected upper extremity?

Elevating leg rests to reduce lower extremity edema
Lap tray or arm trough to prevent shoulder subluxation and dependent edema (Correct answer)
High back support to manage lateral trunk lean
Anti-tip devices for wheelchair safety

Correct answer: Lap tray or arm trough to prevent shoulder subluxation and dependent edema

Flaccid hemiplegia leaves the shoulder unsupported, making subluxation and dependent edema major risks; a lap tray or arm trough provides essential support for the affected extremity.

Question 76: Which factor directly affects a client’s ability to independently propel a wheelchair?

Color scheme
Seat color
Spoke pattern
Frame weight and wheel type (Correct answer)

Correct answer: Frame weight and wheel type

The weight of the wheelchair frame directly impacts the effort required for propulsion; lighter chairs are easier to push. Additionally, the wheel type (e.g., pneumatic vs. solid tires, wheel size) affects rolling resistance and maneuverability. Both factors are crucial for a client's ability to independently and efficiently propel their wheelchair.

Question 77: Which postural deviation is characterized by lateral curvature of the spine?

Scoliosis (Correct answer)
Kyphosis
Pelvic obliquity
Lordosis

Correct answer: Scoliosis

Scoliosis is a lateral curvature of the spine that can affect seated posture and seating system design.

Question 78: When evaluating cushion performance using pressure mapping, a clinician should look for:

Only the pressure under the greater trochanters
The highest peak pressure point only
Overall cushion color on the pressure map
Pressure distribution across the entire seating surface with identification of peak pressure areas (Correct answer)

Correct answer: Pressure distribution across the entire seating surface with identification of peak pressure areas

Effective pressure mapping evaluation considers overall distribution across the seating surface, not just a single peak point, to optimize cushion selection.

Question 79: Heterotopic ossification (HO) following spinal cord injury MOST commonly develops at which anatomical location?

Shoulder and elbow joints
Ankles and feet
Hips and knees (Correct answer)
Wrist and hand joints

Correct answer: Hips and knees

HO after SCI preferentially forms at the hips and knees, where it can severely restrict range of motion and significantly compromise seated positioning.

Question 80: A client presents with a posterior pelvic tilt in sitting. Which intervention is most appropriate first?

Increase seat depth
Assess for hip flexor tightness or fixed deformity (Correct answer)
Recommend a power tilt system
Add a recline feature

Correct answer: Assess for hip flexor tightness or fixed deformity

Posterior pelvic tilt often results from hip flexor tightness or fixed deformity, which must be assessed before selecting interventions.

Question 81: A client with hemiplegia after stroke wishes to self-propel a manual wheelchair using one arm and one leg. Which wheelchair configuration is most appropriate?

Standard dual push rim wheelchair
Power wheelchair only
Standard folding wheelchair with both footrests
Hemi-height wheelchair with footrest removed on affected side for one-leg propulsion, or a single lever or dual rim on one side (Correct answer)

Correct answer: Hemi-height wheelchair with footrest removed on affected side for one-leg propulsion, or a single lever or dual rim on one side

A hemi-height wheelchair with lowered seat height allows foot propulsion on one side, and single-arm drive or one-arm-drive configurations address upper extremity hemiplegia.

Question 82: Why is client and caregiver education important during equipment delivery?

To reduce documentation
To ensure safe and effective equipment use (Correct answer)
To increase appointment time
To promote optional accessories

Correct answer: To ensure safe and effective equipment use

Thorough education empowers clients and caregivers to operate, maintain, and troubleshoot the equipment correctly and safely. This prevents misuse, reduces the risk of injury, and maximizes the equipment's benefits. It promotes long-term independence and satisfaction by ensuring safe and effective equipment use.

Question 83: A conflict of interest in CRT provision most commonly arises when:

A physician prescribes a wheelchair
A therapist evaluates a client at a hospital
A client chooses their preferred wheelchair color
A supplier representative recommends only products from their own company without disclosing this limitation (Correct answer)

Correct answer: A supplier representative recommends only products from their own company without disclosing this limitation

Conflict of interest arises when a supplier's financial incentive to sell their own products could override their professional obligation to recommend the best option for the client.

Question 84: A pressure mapping system in seating evaluation is used to:

Test cushion durability over time
Visualize and quantify interface pressure distribution between the client and the seating surface (Correct answer)
Measure the client's blood pressure during sitting
Assess joint range of motion in sitting

Correct answer: Visualize and quantify interface pressure distribution between the client and the seating surface

Pressure mapping provides a visual map of interface pressure distribution to help identify high-pressure areas and evaluate the effectiveness of different cushion options.

Question 85: A client with secondary progressive multiple sclerosis presents with increasing fatigue and lower extremity weakness. Which seating feature should be prioritized FIRST?

Manual lightweight frame to encourage activity
Pressure relief cushion as the sole intervention
Tilt-in-space functionality to manage fatigue and enable passive pressure relief (Correct answer)
Custom contoured back support only

Correct answer: Tilt-in-space functionality to manage fatigue and enable passive pressure relief

Tilt-in-space reduces the energy expenditure of active repositioning, directly addressing the fatigue that is a hallmark of progressive MS.

Question 86: Which cushion type is known for excellent pressure relief?

Air-filled cushion (Correct answer)
Foam cushion
Vinyl seat cover
Gel cushion

Correct answer: Air-filled cushion

Air-filled cushions are known for excellent pressure relief. Their interconnected air cells conform precisely to the user's body contours, distributing pressure evenly and minimizing peak pressure points. This makes them highly effective in reducing the risk of skin breakdown, especially for individuals with high-risk needs.

Question 87: When a Medicare claim for a power wheelchair is denied, the first level of appeal is called:

Qualified Independent Contractor (QIC) redetermination
Administrative Law Judge (ALJ) hearing
Office of Medicare Hearings and Appeals (OMHA)
Redetermination by the Medicare Administrative Contractor (MAC) (Correct answer)

Correct answer: Redetermination by the Medicare Administrative Contractor (MAC)

The first level of Medicare appeal is a redetermination request submitted to the Medicare Administrative Contractor (MAC) that processed the original claim.

Question 88: When assessing a client's sitting balance, the SMS clinician should first evaluate:

Wheelchair model preferences
Insurance funding source
Home environment accessibility
Supported and unsupported sitting ability (Correct answer)

Correct answer: Supported and unsupported sitting ability

Evaluating both supported and unsupported sitting balance determines the level of external postural support required from the seating system.

Question 89: Which feature allows a power wheelchair to maintain a consistent speed when traveling down a slope?

Anti-rollback or downhill braking control (Correct answer)
Center-of-gravity adjustment
Swing-away footrests
Tilt-in-space mechanism

Correct answer: Anti-rollback or downhill braking control

Anti-rollback or downhill speed control features regulate the power wheelchair's speed on slopes, preventing uncontrolled acceleration when descending.

Question 90: What does 'windswept' hip deformity refer to in seating?

Bilateral hip flexion contractures
Hip dislocation due to spasticity
Both hips abducted symmetrically
One hip adducted and internally rotated while the other is abducted and externally rotated (Correct answer)

Correct answer: One hip adducted and internally rotated while the other is abducted and externally rotated

Windswept deformity occurs when both lower extremities are rotated to the same side, with asymmetric hip positioning.

Question 91: Which seated position places the highest pressure on the ischial tuberosities?

Upright 90-degree hip flexion without cushion (Correct answer)
Fully reclined at 135 degrees
Semi-reclined with tilt
Anterior pelvic tilt on a contoured cushion

Correct answer: Upright 90-degree hip flexion without cushion

An upright 90-degree seated position without a pressure-relieving cushion concentrates the highest interface pressures directly on the ischial tuberosities.

Question 92: Which drive control option might suit a client with limited hand function?

T-hand control
Chin control
Standard joystick
Sip-and-puff system (Correct answer)

Correct answer: Sip-and-puff system

A sip-and-puff system allows a user to control a power wheelchair by inhaling (sip) or exhaling (puff) into a tube. This method requires minimal oral motor control and is an excellent option for individuals with severe upper extremity weakness or paralysis. It provides a means for independent mobility when other controls are not feasible.

Question 93: What is the purpose of camber on manual wheelchair rear wheels?

Enables the footrests to clear the floor
Increases the overall height of the wheelchair
Reduces the wheelbase length
Widens the base of support for stability and improves propulsion biomechanics (Correct answer)

Correct answer: Widens the base of support for stability and improves propulsion biomechanics

Wheel camber tilts the tops of the rear wheels inward, lowering the hand contact point for improved propulsion and widening the base for lateral stability.

Question 94: When positioning a client with significant kyphosis, which seating adjustment can help maintain upright head position?

Increasing back angle or using a recline/tilt feature (Correct answer)
Lowering footrest height
Increasing seat height
Adding medial knee supports

Correct answer: Increasing back angle or using a recline/tilt feature

Increasing back angle or using tilt/recline can accommodate thoracic kyphosis while maintaining head position.

Question 95: Which client population is at HIGHEST risk for seated pressure injuries?

Elderly clients with mild osteoarthritis
Clients with spinal cord injury, insensate skin, and limited mobility (Correct answer)
Ambulatory clients who use a wheelchair occasionally
Clients with full sensation and normal cognition

Correct answer: Clients with spinal cord injury, insensate skin, and limited mobility

Clients with spinal cord injury have insensate skin, limited mobility to shift weight, and often circulatory impairment, placing them at the highest risk for seated pressure injuries.

Question 96: A client with post-polio syndrome who currently uses a manual wheelchair reports increasing upper extremity pain and weakness with propulsion. What does this finding indicate?

A normal finding that requires no equipment change
That a heavier, more durable manual frame should be prescribed
That the client should increase propulsion to strengthen upper extremity muscles
A need for reassessment and likely transition to power mobility to protect remaining function (Correct answer)

Correct answer: A need for reassessment and likely transition to power mobility to protect remaining function

Post-polio syndrome causes progressive overuse weakness; increasing UE pain and fatigue with propulsion signals that the manual wheelchair is compromising remaining motor units and power mobility should be evaluated.

Question 97: A client with Huntington's disease exhibits involuntary choreiform movements while seated. Which wheelchair feature is MOST important for safety?

Posterior anti-tip devices and securely mounted positioning components to prevent falls during involuntary movements (Correct answer)
Power tilt-in-space for repositioning
Solid seat insert for improved postural base
High-friction push rims for propulsion control

Correct answer: Posterior anti-tip devices and securely mounted positioning components to prevent falls during involuntary movements

Choreiform movements are unpredictable and forceful; anti-tip devices and securely mounted components prevent the wheelchair from tipping and components from dislodging during involuntary episodes.

Question 98: An SMS professional observes that a client's current power wheelchair is causing skin breakdown. The professional is legally and ethically obligated to:

Wait for the client to request a change
Document the observation, inform the client and physician, and recommend urgent seating modification (Correct answer)
Report the original prescriber to the licensing board
Refer the client to a wound care center only

Correct answer: Document the observation, inform the client and physician, and recommend urgent seating modification

When observing harm, the professional must document the issue, inform relevant parties (client and physician), and take prompt action to modify the seating system to prevent further injury.

Question 99: How often should a client with full sensation be instructed to perform seated pressure reliefs?

Once daily
Only when experiencing discomfort
Every 15–30 minutes (Correct answer)
Every 2 hours

Correct answer: Every 15–30 minutes

Clients with sensation should perform pressure reliefs every 15–30 minutes while seated to prevent ischemic damage.

Question 100: Which propulsion pattern is most biomechanically efficient and least injurious for manual wheelchair users?

Two-finger push technique
Short choppy strokes with frequent hand repositioning
Semicircular pattern with long smooth strokes (Correct answer)
Rear push pattern starting behind the axle

Correct answer: Semicircular pattern with long smooth strokes

A long, smooth semicircular propulsion pattern with low push frequency reduces repetitive strain and maximizes efficiency for manual wheelchair users.

Question 101: A simulator is used during the seating evaluation primarily to:

Determine insurance reimbursement eligibility
Train caregivers on transfers
Measure spasticity levels
Assess positioning tolerance and simulate equipment configurations before ordering (Correct answer)

Correct answer: Assess positioning tolerance and simulate equipment configurations before ordering

A seating simulator allows the clinician to trial different angles and support configurations to determine optimal positioning before ordering custom equipment.

Question 102: When a payer requests a 'peer review' of a wheelchair claim, this means:

Another ATP must co-sign the evaluation
The treating physician peer-reviews the ATP's recommendation
A physician or clinician hired by the payer reviews the clinical documentation to determine medical necessity (Correct answer)
Two therapists must conduct the evaluation

Correct answer: A physician or clinician hired by the payer reviews the clinical documentation to determine medical necessity

Peer review is a process where the payer engages a clinical reviewer to evaluate the submitted documentation and determine if medical necessity criteria are met.

Question 103: Which seating component most directly addresses lateral trunk instability?

Headrest
Anti-tip device
Footrest extender
Lateral trunk supports (Correct answer)

Correct answer: Lateral trunk supports

Lateral trunk supports (sometimes called thoracic supports) are positioned to provide lateral stability to the trunk.

Question 104: When evaluating a client's home for power wheelchair accessibility, which measurement is most critical for doorway navigation?

Window sill height
Carpet pile height
Ceiling height
Door width compared to wheelchair width plus maneuvering space (Correct answer)

Correct answer: Door width compared to wheelchair width plus maneuvering space

Door width must exceed the wheelchair width, with additional maneuvering space for approach and turning; this is the primary architectural barrier in home accessibility for power wheelchair users.

Question 105: The RESNA Code of Ethics requires assistive technology professionals to:

Prioritize payer requirements over client needs
Avoid documentation to protect client privacy
Hold client welfare as primary and maintain professional competence (Correct answer)
Only recommend products from certified manufacturers

Correct answer: Hold client welfare as primary and maintain professional competence

The RESNA Code of Ethics places client welfare as the primary obligation and requires professionals to maintain competence through continuing education.

Question 106: Which factor most influences the choice between a folding versus rigid frame manual wheelchair?

Transport, storage needs, and client's propulsion ability and activity level (Correct answer)
Client's height and weight only
Preferred wheelchair color
Insurance coverage tier

Correct answer: Transport, storage needs, and client's propulsion ability and activity level

The choice between folding and rigid frames depends primarily on how the wheelchair will be transported (car loading, storage), the client's active versus dependent use, and propulsion efficiency needs.

Question 107: Which ethical principle requires that a seating professional recommend the device that best meets the client's needs rather than the one with the highest profit margin?

Non-maleficence
Autonomy
Justice
Beneficence (Correct answer)

Correct answer: Beneficence

Beneficence requires the professional to act in the client's best interest, which means recommending the most appropriate device rather than the most profitable one.

Question 108: When prescribing a propulsion system for a client with rheumatoid arthritis affecting the wrists and hands, which joint protection principle should guide the selection?

Encourage maximum resistance during propulsion to maintain joint strength
Minimize ulnar deviation and reduce joint stress during the propulsion stroke (Correct answer)
Focus on finger flexor exercises to improve push rim contact
Prioritize grip strength testing to determine appropriate resistance

Correct answer: Minimize ulnar deviation and reduce joint stress during the propulsion stroke

Rheumatoid arthritis causes progressive joint destruction; propulsion systems and techniques must minimize ulnar deviation forces and overall joint loading to protect already compromised wrist and hand joints.

Question 109: Who is typically responsible for obtaining funding authorization for mobility equipment?

Medical assistant
Family caregiver
Dietitian
Equipment supplier (Correct answer)

Correct answer: Equipment supplier

Equipment suppliers typically have specialized knowledge of insurance requirements, documentation processes, and funding sources. They often work closely with the prescribing clinician to submit necessary paperwork, such as a Letter of Medical Necessity, to secure funding authorization from insurance providers. This streamlines the complex funding process.

Question 110: The term 'prior authorization' in wheelchair funding refers to:

Manufacturer approval for custom modifications
Payer approval obtained before the device is provided, to confirm coverage (Correct answer)
State Medicaid pre-certification of the supplier
Approval from the physician before the therapist evaluates the patient

Correct answer: Payer approval obtained before the device is provided, to confirm coverage

Prior authorization is a process where the payer reviews clinical documentation and approves coverage before the device is ordered and delivered.

Question 111: Why is proper backrest height important in a wheelchair?

To accommodate stickers
For aesthetic symmetry
To hold cupholders
To ensure trunk support and mobility balance (Correct answer)

Correct answer: To ensure trunk support and mobility balance

Proper backrest height is crucial for providing adequate trunk support without impeding upper body movement. If the backrest is too low, it lacks sufficient support; if too high, it can restrict arm movement necessary for propulsion or interfere with shoulder blade function. Achieving the correct height ensures both postural stability and functional mobility.

Question 112: A client with C7 complete SCI has an advantage over C6 in which key seating-related functional area?

Ability to operate a power wheelchair independently
Intact shoulder abduction for transfers
Ability to perform push-up pressure relief due to intact triceps (elbow extensors) (Correct answer)
Full intrinsic hand strength for grip

Correct answer: Ability to perform push-up pressure relief due to intact triceps (elbow extensors)

The C7 myotome includes triceps; intact elbow extension enables the push-up pressure relief maneuver that is not typically possible at C6 due to absent triceps function.

Question 113: Which type of manual wheelchair is most appropriate for an active user who self-propels full time?

Standard folding hospital-style wheelchair
Ultra-lightweight rigid frame wheelchair (Correct answer)
Heavy-duty transport chair
Reclining wheelchair

Correct answer: Ultra-lightweight rigid frame wheelchair

Ultra-lightweight rigid frame wheelchairs are most appropriate for full-time active users due to their minimal weight, energy-efficient rigid frame, and customizable fit.

Question 114: Why might a power-assist device be recommended for a manual wheelchair user?

Reduce upper limb fatigue and improve mobility (Correct answer)
To make chair heavier
For better appearance
For night use only

Correct answer: Reduce upper limb fatigue and improve mobility

Power-assist devices attach to manual wheelchairs to provide motor assistance during propulsion. This significantly reduces the physical effort required, lessening strain on the shoulders and wrists, and extending endurance. It allows users to travel further or navigate challenging terrain with less fatigue, thereby improving overall mobility and reducing upper limb fatigue.

Question 115: What is the primary advantage of a power assist add-on for manual wheelchairs compared to a standard power wheelchair?

Better suited for outdoor rough terrain than power chairs
Preserves manual propulsion skills and independence while reducing upper extremity strain (Correct answer)
Requires no battery maintenance
Lower cost always

Correct answer: Preserves manual propulsion skills and independence while reducing upper extremity strain

Power assist devices add motorized assistance to manual propulsion, reducing shoulder strain while preserving the user's active propulsion and maintaining a smaller, more maneuverable footprint than a full power chair.

Question 116: Which GMFCS level describes a child with cerebral palsy who walks using a handheld mobility device but uses wheeled mobility for longer community distances?

Level II
Level I
Level IV
Level III (Correct answer)

Correct answer: Level III

GMFCS Level III children walk with handheld assistive devices and rely on wheeled mobility for community distances, reflecting limited but present ambulation capacity.

Question 117: Rear axle position on a manual wheelchair affects all of the following EXCEPT:

Wheelie stability
Seating depth measurement (Correct answer)
Propulsion efficiency
Rolling resistance

Correct answer: Seating depth measurement

Rear axle position affects propulsion efficiency, stability, and rolling resistance, but seating depth is determined by the seat dimensions, not axle position.

Question 118: A more posterior (rearward) rear axle position on a manual wheelchair:

Has no effect on propulsion effort
Reduces propulsion efficiency but improves rearward stability
Improves propulsion efficiency by moving the wheel closer to the hand but decreases anti-tip stability (Correct answer)
Increases the effort needed to propel

Correct answer: Improves propulsion efficiency by moving the wheel closer to the hand but decreases anti-tip stability

A rearward axle position improves propulsion efficiency by bringing the rear wheel closer to the optimal hand position but reduces anti-tip stability, making the chair more prone to tipping backward.

Question 119: Which of the following best describes the concept of 'assistive technology abandonment'?

When a device is returned to the supplier for upgrade
When funding is denied by the insurance company
When a client stops using a prescribed assistive technology device, often due to poor fit, poor training, or inadequate follow-up (Correct answer)
When a device is stolen from the user

Correct answer: When a client stops using a prescribed assistive technology device, often due to poor fit, poor training, or inadequate follow-up

Assistive technology abandonment occurs when clients discontinue using their devices, commonly due to poor device-user match, inadequate training, or lack of ongoing support.

Question 120: Which of these is a benefit of involving the client in their own equipment selection process?

Minimizes therapist responsibility
Reduces clinical paperwork
Increases user satisfaction and independence (Correct answer)
Speeds up appointment time

Correct answer: Increases user satisfaction and independence

Involving the client in their own equipment selection process increases user satisfaction and independence. When clients have input, they are more likely to choose equipment that aligns with their personal preferences, lifestyle, and functional goals. This collaborative approach fosters a sense of ownership and promotes greater adherence and successful use.

Question 121: A client with hereditary spastic paraplegia demonstrates a scissoring lower extremity pattern in sitting. Which seating intervention MOST directly addresses this pattern?

Hip abduction positioning component to counteract the adductor tone (Correct answer)
Anterior chest strap for trunk stability
Padded lateral trunk supports
Reclined backrest angle to reduce hip flexion

Correct answer: Hip abduction positioning component to counteract the adductor tone

Hereditary spastic paraplegia produces symmetric hip adductor spasticity causing scissoring; a hip abduction component mechanically counteracts this pattern to maintain proper pelvic and lower extremity alignment.

Question 122: What is a Letter of Medical Necessity (LMN) in the context of seating and mobility funding?

A form completed by the equipment supplier listing device costs
A clinician-authored document that explains why a specific device is medically required for the patient (Correct answer)
A note from the insurance case manager approving the device
A Medicare-required form for all DME orders

Correct answer: A clinician-authored document that explains why a specific device is medically required for the patient

An LMN is written by the prescribing clinician or therapist detailing the patient's diagnosis, functional limitations, and clinical justification for the specific device requested.

Question 123: Why is proper seat width important in wheelchair seating?

Speed up mobility
Prevent pressure injuries and improve positioning (Correct answer)
Accommodate excess accessories
To match upholstery color

Correct answer: Prevent pressure injuries and improve positioning

Proper seat width in wheelchair seating is crucial to prevent pressure injuries and improve positioning. A seat that is too narrow can cause excessive pressure on the hips and thighs, leading to skin breakdown. Conversely, a seat that is too wide can result in poor lateral support, promoting slouching and increasing the risk of shear forces and instability.

Question 124: Which assessment tool is used in CRT to evaluate a client's participation and quality of life outcomes related to assistive technology?

Berg Balance Scale
FIM (Functional Independence Measure)
QUEST (Quebec User Evaluation of Satisfaction with Assistive Technology) (Correct answer)
MMSE (Mini-Mental State Examination)

Correct answer: QUEST (Quebec User Evaluation of Satisfaction with Assistive Technology)

QUEST (Quebec User Evaluation of Satisfaction with Assistive Technology) is a validated tool specifically designed to measure client satisfaction with assistive technology devices and related services.

Question 125: A client reports that their cushion 'bottoms out.' This means:

The cover has worn through at the bottom
The cushion has slipped off the seat
The bony prominences have sunk through the cushion material and are near or in contact with the hard seat base (Correct answer)
The cushion is too wide for the wheelchair

Correct answer: The bony prominences have sunk through the cushion material and are near or in contact with the hard seat base

Bottoming out occurs when the bony prominences compress the cushion fully, eliminating pressure redistribution and placing the bones in near-contact with the hard seat surface.

Question 126: Which professional typically conducts a clinical mobility assessment?

Social worker
Respiratory therapist
Occupational or physical therapist (Correct answer)
Speech-language pathologist

Correct answer: Occupational or physical therapist

An Occupational Therapist (OT) or Physical Therapist (PT) typically conducts a clinical mobility assessment. These professionals possess the specialized knowledge and skills to evaluate a client's physical capabilities, range of motion, strength, balance, and functional mobility. Their expertise is crucial for determining appropriate interventions and equipment recommendations.

Question 127: What is a common clinical indicator for a headrest in a wheelchair?

Overactive hand use
Excessive height
Tire punctures
Impaired head control (Correct answer)

Correct answer: Impaired head control

A headrest provides essential support for individuals who cannot maintain an upright head position independently due to weakness, muscle tone issues, or fatigue. It helps maintain cervical alignment, improves visual field, and prevents neck strain. Therefore, impaired head control is a direct clinical indicator for its use.

Question 128: In late-stage ALS (amyotrophic lateral sclerosis), which wheelchair feature becomes MOST essential as the disease progresses?

Rigid ultralight frame to maximize propulsion efficiency
High-grip push rims to compensate for hand weakness
Standard sling seat for portability
Power tilt and recline for passive positioning and pressure management (Correct answer)

Correct answer: Power tilt and recline for passive positioning and pressure management

Progressive motor neuron loss in ALS eliminates the client's ability to independently reposition; power tilt and recline provide pressure relief and positioning that the client can no longer perform actively.

Question 129: When should documentation of the service delivery process occur?

When the equipment breaks
Immediately after each step (Correct answer)
Only for legal cases
At the end of the month

Correct answer: Immediately after each step

Timely and accurate documentation after each step of the service delivery process ensures a complete and defensible record. This supports continuity of care, facilitates communication among the team, justifies funding, and provides a legal record of services provided. Waiting to document can lead to inaccuracies or omissions.

Question 130: Which type of wheelchair cushion uses a fluid-filled bladder to distribute pressure?

Air-filled or gel cushion (Correct answer)
Honeycomb polymer cushion
Solid insert cushion
Foam cushion

Correct answer: Air-filled or gel cushion

Air-filled and gel cushions use fluid (air or viscous gel) to distribute pressure across a wider surface area through fluid dynamics.

Question 131: Which standard provides guidance for power wheelchair safety and performance testing?

ISO 7176 series (Wheelchairs standard)
FDA Class II device regulations only
ANSI/RESNA wheelchair standards
Both ISO 7176 and ANSI/RESNA standards (Correct answer)

Correct answer: Both ISO 7176 and ANSI/RESNA standards

Both ISO 7176 (international) and ANSI/RESNA standards (US) provide test methods and performance requirements for powered wheelchairs, and they are harmonized to be largely equivalent.

Question 132: Which organization specifically advocates for CRT as a separate, protected category of DME under Medicare?

American Hospital Association
National Coalition for Assistive and Rehab Technology (NCART) (Correct answer)
Joint Commission
American Medical Association (AMA)

Correct answer: National Coalition for Assistive and Rehab Technology (NCART)

NCART is a trade association specifically advocating for the CRT industry, including legislative efforts to protect CRT from competitive bidding and ensure appropriate funding.

Question 133: Which assessment is essential to identify seating pressures and risk of skin breakdown?

Cardiac stress test
Pulmonary function test
Pressure mapping assessment (Correct answer)
Visual acuity test

Correct answer: Pressure mapping assessment

A pressure mapping assessment is essential to identify seating pressures and the risk of skin breakdown. This specialized tool uses sensors to visualize and quantify pressure distribution across the seating surface. It provides objective data crucial for selecting appropriate cushions and making adjustments to prevent pressure injuries.

Question 134: The International Classification of Functioning, Disability and Health (ICF) model is used in CRT practice primarily to:

Classify wheelchair types by complexity
Determine insurance eligibility for assistive technology
Frame the relationship between health conditions, body functions/structures, activities, participation, and environmental and personal factors (Correct answer)
Code diagnoses for billing purposes

Correct answer: Frame the relationship between health conditions, body functions/structures, activities, participation, and environmental and personal factors

The ICF model provides a biopsychosocial framework for understanding how a health condition interacts with body function, activities, participation, and contextual factors, guiding comprehensive CRT evaluation and goal-setting.

Question 135: The 'team approach' in CRT provision typically includes which members?

Physician, rehabilitation therapist (OT/PT), ATP/SMS, supplier, and the client and caregivers (Correct answer)
Insurance case manager, supplier, and physician only
Physician, ATP/SMS, and DMEPOS supplier only
ATP, engineer, and manufacturer representative

Correct answer: Physician, rehabilitation therapist (OT/PT), ATP/SMS, supplier, and the client and caregivers

The CRT team typically includes the prescribing physician, a rehabilitation therapist (OT or PT), the ATP/SMS, the DMEPOS supplier, and most importantly, the client and their caregivers.

Question 136: When assessing a client's ability to drive a power wheelchair, which environment should be tested FIRST?

A simulated driving course with tight obstacle spacing
A quiet, open indoor space (Correct answer)
Outdoor terrain and curb cuts
A crowded shopping mall

Correct answer: A quiet, open indoor space

Initial power wheelchair driving assessment should begin in a quiet, open indoor space to allow the client to learn basic control before advancing to more complex environments.

Question 137: A client with C5 level spinal cord injury typically requires which type of upper extremity support in the wheelchair?

Arm troughs or lap tray to support flaccid arms (Correct answer)
Wrist splints only
Elbow extension splints
No upper extremity support needed

Correct answer: Arm troughs or lap tray to support flaccid arms

C5 SCI results in limited hand and elbow extension function, so arm troughs or a lap tray support the upper extremities and prevent shoulder subluxation.

Question 138: What is the 90-90-90 rule in seating?

90% weight through ischials, 90-degree knees, 90-degree ankles
Seat tilt of 90 degrees, back angle of 90 degrees, footrest at 90 degrees
90 minutes maximum seated time
Hips, knees, and ankles each at 90-degree angles (Correct answer)

Correct answer: Hips, knees, and ankles each at 90-degree angles

The 90-90-90 rule describes ideal seated alignment with hips, knees, and ankles each at approximately 90 degrees.

Question 139: What should always be considered when selecting back supports for wheelchairs?

Wheel size preference
Match upholstery color
Cup holder compatibility
User’s postural alignment and support needs (Correct answer)

Correct answer: User’s postural alignment and support needs

Back supports are critical for maintaining proper spinal alignment, preventing deformities, and providing stability in a wheelchair. Their selection must be based on a thorough assessment of the user's specific postural needs, including trunk control, spinal curves, and any existing asymmetries. This ensures effective support and comfort.

Question 140: Informed consent in assistive technology provision requires that the client be told:

Their diagnosis, all available options, risks and benefits of each option, and their right to refuse (Correct answer)
Only that the device has been approved by their insurance
The ATP's credentials and experience
Only the recommended device and its cost

Correct answer: Their diagnosis, all available options, risks and benefits of each option, and their right to refuse

Informed consent requires the client be fully informed of their condition, all reasonable options, risks and benefits, and their right to refuse any recommended intervention.

Question 141: What is the most important factor when selecting mobility equipment for a client?

Warranty length
Latest product model
Color options
Client’s mobility needs and environment (Correct answer)

Correct answer: Client’s mobility needs and environment

The primary goal of mobility equipment is to enhance a client's independence and participation in their daily life. Therefore, equipment selection must be tailored to their specific physical capabilities, functional goals, and the environments (home, work, community) where they will use the device. This client-centered approach ensures the equipment truly meets their needs.

Question 142: Why is it important to document a client's current mobility status during evaluation?

For marketing records
To qualify for insurance discounts
To recommend hospital admission
To guide equipment decisions and care plans (Correct answer)

Correct answer: To guide equipment decisions and care plans

It is important to document a client's current mobility status during evaluation to guide equipment decisions and care plans. This documentation provides a baseline of their functional abilities and limitations, which is critical for selecting the most suitable mobility aids and developing individualized strategies to enhance their independence and well-being.

Question 143: A client with incomplete SCI (ASIA C classification) has preserved but weak lower extremity motor function. What should guide equipment selection?

Select equipment that supports current function while remaining adaptable to potential changes in functional status (Correct answer)
Prescribe the most durable power wheelchair to ensure long-term use
Focus exclusively on pressure relief and ignore propulsion options
Provide a standard manual wheelchair without modifications

Correct answer: Select equipment that supports current function while remaining adaptable to potential changes in functional status

ASIA C incomplete SCI carries potential for neurological recovery; equipment must support present function while allowing adjustments as the client's status changes.

Question 144: When documenting a seating evaluation for funding purposes, the clinician should primarily focus on:

Functional limitations, diagnosis, and why less costly alternatives are insufficient (Correct answer)
The client's preference for color and style
The clinician's years of experience with the device
Comparison with other brands not being recommended

Correct answer: Functional limitations, diagnosis, and why less costly alternatives are insufficient

Funding documentation must clearly establish the client's diagnosis, functional limitations, and why less costly or simpler alternatives will not meet their needs.

Question 145: The 'Human Activity Assistive Technology (HAAT) model' considers which four components?

Habilitation, Adaptation, Accommodation, and Technology
Health, Ability, Action, and Technology
Human, Activity, Assistive Technology, and Context (Correct answer)
Human, Assessment, Application, and Training

Correct answer: Human, Activity, Assistive Technology, and Context

The HAAT model frames assistive technology provision around the interaction of the Human, the Activity being performed, the Assistive Technology, and the Context or environment.

Question 146: Which document from CMS provides coverage and coding guidelines for power mobility devices?

Local Coverage Determination (LCD) (Correct answer)
National Drug Code (NDC) policy
CMS Transmittal 100-02
Medicare Benefit Policy Manual Chapter 3

Correct answer: Local Coverage Determination (LCD)

Local Coverage Determinations (LCDs) issued by Medicare Administrative Contractors provide detailed coverage criteria and documentation requirements for power mobility devices.

Question 147: When a client with a new pressure injury needs to continue wheelchair use, the SMS clinician's FIRST priority should be:

Prescribe a new power wheelchair
Apply a wound dressing and continue the current seating system
Refer to a wound care specialist without changing the seating
Eliminate or significantly redistribute pressure at the wound site (Correct answer)

Correct answer: Eliminate or significantly redistribute pressure at the wound site

The seating system must be urgently modified to eliminate or redistribute pressure at the wound site to allow healing while allowing continued mobility.

Certified Seating and Mobility Specialist (SMS) Exam

The SMS certification validates advanced knowledge and skills in evaluating, selecting, and fitting complex seating and mobility systems.

150

Questions

180 min

Time Limit

70%

To Pass

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