PROSTHETIC CPM FINAL PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ What history contents should be taken at the initial evaluation of a
patient Answer: Cause of amputation and/date
Comorbidities
Any issues with contralateral limb or upper extremities
Current activities
Job duties
Goals
Home Environment
Use of Assistive devices
MMT/ROM
Thomas Test
Previous Prosthetic History
◉ Give two advantages and disadvantage to a TSB socket Answer:
Advantages: No need for reliefs or accentuated pressure, use of roll on
liner for increased cushion/reduction of shear forces
Disadvantages: May lose rotation control, patient must be able to don
and clean liners (hygenic)
,◉ Give two advantages and disadvantage to a PTB socket Answer:
Advantage: Use of pelite liner, low maintenance, rotational control
Disadvantage: Patient may not be able to tolerate pressures, may not
control fatty limbs
◉ Give two advantages and disadvantages to suction socket w/valve
Answer: Advantages= greater proprioceptive feedback, less pistoning
Disadvantages: requires sleeve which adds bulk, sleeve can get holes
which causes failure in system
◉ Give two advantages and disadvantages to roll on locking liner
Answer: Advantages= audible confirmation of suspension, quick
suspension (fewer steps), all benefits of liner, good for low activity
patients or those who need assistance
Disadvantages= Pistoning, requires hand dexterity to don, need to be
replaced every 6 months
◉ Give two advantages and disadvantages to pure sleeve suspension
Answer: Advantages: Good auxiliary suspension, simple, can be
cosmetically appealing,
Disadvantages: adds an additional layer of material bulk behind knee,
hot, quickly get holes
, ◉ Give two advantages and disadvantages to Roll on gel liner w/seal
Answer: Advantages= greater surface area of contact that prevents
pistoning, control edema on distal end, no sleeve required allows for
more knee flexion
Disadvantages: little tolerance for limb volume fluctuations, requires
push valve that can cut pants, requires more maintenance
◉ Give two advantages and disadvantages to roll on gel liner w/
elevated vacuum Answer: Advantages: limb volume control, limb health,
better proprioception, increased control of socket
Disadvantages: expensive, higher risk of creating blisters if not fit
properly, more exact fit required
◉ Give two advantages and disadvantages to supracondylar +
Suprapatellar Answer: Pro: provides A/P stability, Provides M/L
stability, limits recurvatum,
Con: Supra-patellar bar can be uncomfortable, can limit knee motion
◉ What is the attachment site of a supracondylar cuff strap Answer:
12mm posterior to midline and 12 mm proximal to MTP(medial tibial
plateu
◉ What are the advantages and disadvantages to a supracondylar cuff
strap Answer: Advantages: Easily adjustable, easy to don and doff,
provide some control of knee flexion
QUESTIONS WITH ANSWERS GRADED A+
◉ What history contents should be taken at the initial evaluation of a
patient Answer: Cause of amputation and/date
Comorbidities
Any issues with contralateral limb or upper extremities
Current activities
Job duties
Goals
Home Environment
Use of Assistive devices
MMT/ROM
Thomas Test
Previous Prosthetic History
◉ Give two advantages and disadvantage to a TSB socket Answer:
Advantages: No need for reliefs or accentuated pressure, use of roll on
liner for increased cushion/reduction of shear forces
Disadvantages: May lose rotation control, patient must be able to don
and clean liners (hygenic)
,◉ Give two advantages and disadvantage to a PTB socket Answer:
Advantage: Use of pelite liner, low maintenance, rotational control
Disadvantage: Patient may not be able to tolerate pressures, may not
control fatty limbs
◉ Give two advantages and disadvantages to suction socket w/valve
Answer: Advantages= greater proprioceptive feedback, less pistoning
Disadvantages: requires sleeve which adds bulk, sleeve can get holes
which causes failure in system
◉ Give two advantages and disadvantages to roll on locking liner
Answer: Advantages= audible confirmation of suspension, quick
suspension (fewer steps), all benefits of liner, good for low activity
patients or those who need assistance
Disadvantages= Pistoning, requires hand dexterity to don, need to be
replaced every 6 months
◉ Give two advantages and disadvantages to pure sleeve suspension
Answer: Advantages: Good auxiliary suspension, simple, can be
cosmetically appealing,
Disadvantages: adds an additional layer of material bulk behind knee,
hot, quickly get holes
, ◉ Give two advantages and disadvantages to Roll on gel liner w/seal
Answer: Advantages= greater surface area of contact that prevents
pistoning, control edema on distal end, no sleeve required allows for
more knee flexion
Disadvantages: little tolerance for limb volume fluctuations, requires
push valve that can cut pants, requires more maintenance
◉ Give two advantages and disadvantages to roll on gel liner w/
elevated vacuum Answer: Advantages: limb volume control, limb health,
better proprioception, increased control of socket
Disadvantages: expensive, higher risk of creating blisters if not fit
properly, more exact fit required
◉ Give two advantages and disadvantages to supracondylar +
Suprapatellar Answer: Pro: provides A/P stability, Provides M/L
stability, limits recurvatum,
Con: Supra-patellar bar can be uncomfortable, can limit knee motion
◉ What is the attachment site of a supracondylar cuff strap Answer:
12mm posterior to midline and 12 mm proximal to MTP(medial tibial
plateu
◉ What are the advantages and disadvantages to a supracondylar cuff
strap Answer: Advantages: Easily adjustable, easy to don and doff,
provide some control of knee flexion
