PROSTHETIC CPM EXAM PREP QUESTIONS
AND SOLUTIONS 2026 GRADED A+
◉ What questions should you ask at evaluation for a prosthetics.
Answer: Cause and date of amputation
Comorbidities (DM, kidney, hypertension0
Contralateral Limb integrity
Skin Integrity
Hand Dexterity/strength
Vocational/Recreational Activities
Goals
Assistive Devices Used
MMT/ROM (Thomas test)
◉ What are the advantages to a PTB style socket? Answer: Rotational
Control, Relief over bony prominences
◉ What are the advantages to a TSB style socket. Answer: Equal
distribution of pressure over entire limb, use of liner to reduce shear
forces and skin irritation, decreased pistoning
,◉ What are the disadvantages to a PTB style socket? Answer:
Concentrated pressures on select few areas, high pressure on patellar
tendon
◉ What are the disadvantages to a TSB style socket. Answer: Requires
the use of liners patient must be able to don liner, lack of rotational
control
◉ What are the advantages to locking liner suspension. Answer:
Auditory confirmation of lock increase confidence, can have patient start
to don and engage lock while seated, easy to manage volume with socks
◉ What are the disadvantages to a locking liner suspension. Answer:
Pistoning/milking of the limb, can be difficult for patient to align pin and
lock must be consistent, lack of a rotational control
◉ What are the advantages to a cushion liner/sleeve suspension.
Answer: Reduced pistoning of prosthesis, easy volume management,
secure suspension, benefits of liner
◉ What are the disadvantages to a cushion liner/sleeve susupension.
Answer: Increased bulk around the knee that can reduce knee flexion,
can be hot (extra layer), requires dexterity to use liner
, ◉ What are the advantages to a seal in system for suspension. Answer:
Decreased pistoning, increased proprioception, decreased apparent
weight of prosthesis
◉ What are the disadvantages to a a seal in system for suspension?
Answer: More difficult to control volume with socks, must have good
balance to don prosthesis, requires exact fit
◉ What are the advantages to an elevated vacuum system. Answer:
Promotes limb health, decreases pistoning, increased proprioception,
decreased sweating, decreased apparent weight
◉ What are the disadvantages to elevated vacuum. Answer: Can cause
damage to limb if fit is not appropriate, requires exact fit, bulky and
increased weight, expensive
◉ What are the advantages of supracondylar suspension. Answer: Good
for short limbs, ligament laxity, knee instability
Improves stability at knee, ease of don and doffing, increased M/L
stability
◉ What the advantages to a cuff strap suspension? Answer: Easily
adjusted if volume change, good secondary suspension, low
maintenance
AND SOLUTIONS 2026 GRADED A+
◉ What questions should you ask at evaluation for a prosthetics.
Answer: Cause and date of amputation
Comorbidities (DM, kidney, hypertension0
Contralateral Limb integrity
Skin Integrity
Hand Dexterity/strength
Vocational/Recreational Activities
Goals
Assistive Devices Used
MMT/ROM (Thomas test)
◉ What are the advantages to a PTB style socket? Answer: Rotational
Control, Relief over bony prominences
◉ What are the advantages to a TSB style socket. Answer: Equal
distribution of pressure over entire limb, use of liner to reduce shear
forces and skin irritation, decreased pistoning
,◉ What are the disadvantages to a PTB style socket? Answer:
Concentrated pressures on select few areas, high pressure on patellar
tendon
◉ What are the disadvantages to a TSB style socket. Answer: Requires
the use of liners patient must be able to don liner, lack of rotational
control
◉ What are the advantages to locking liner suspension. Answer:
Auditory confirmation of lock increase confidence, can have patient start
to don and engage lock while seated, easy to manage volume with socks
◉ What are the disadvantages to a locking liner suspension. Answer:
Pistoning/milking of the limb, can be difficult for patient to align pin and
lock must be consistent, lack of a rotational control
◉ What are the advantages to a cushion liner/sleeve suspension.
Answer: Reduced pistoning of prosthesis, easy volume management,
secure suspension, benefits of liner
◉ What are the disadvantages to a cushion liner/sleeve susupension.
Answer: Increased bulk around the knee that can reduce knee flexion,
can be hot (extra layer), requires dexterity to use liner
, ◉ What are the advantages to a seal in system for suspension. Answer:
Decreased pistoning, increased proprioception, decreased apparent
weight of prosthesis
◉ What are the disadvantages to a a seal in system for suspension?
Answer: More difficult to control volume with socks, must have good
balance to don prosthesis, requires exact fit
◉ What are the advantages to an elevated vacuum system. Answer:
Promotes limb health, decreases pistoning, increased proprioception,
decreased sweating, decreased apparent weight
◉ What are the disadvantages to elevated vacuum. Answer: Can cause
damage to limb if fit is not appropriate, requires exact fit, bulky and
increased weight, expensive
◉ What are the advantages of supracondylar suspension. Answer: Good
for short limbs, ligament laxity, knee instability
Improves stability at knee, ease of don and doffing, increased M/L
stability
◉ What the advantages to a cuff strap suspension? Answer: Easily
adjusted if volume change, good secondary suspension, low
maintenance
