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Prosthetic CPM Questions and Answers 100% Pass
Question 1: What measurements for a TT Patient need to be
collected for casting?
CORRECT ANSWER: AP(at PTB), M/L (at condyles), PML,
Residual Length, MTP- Floor, Foot Size, Circumferences every 2"
Question 2: What questions should you ask at evaluation for a
prosthetics?
CORRECT ANSWER: Cause and date of amputation,
Comorbidities (DM, kidney, hypertension), Contralateral Limb integrity, Skin Integrity, Hand Dexterity/strength, Vocational/Recreational Activities, Goals, Assistive Devices Used, MMT/ROM (Thomas test)
Question 3: What are the advantages to a PTB style socket?
CORRECT ANSWER: Rotational Control, Relief over bony
prominences
Question 4: What are the advantages to a TSB style socket?
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CORRECT ANSWER: Equal distribution of pressure over
entire limb, use of liner to reduce shear forces and skin irritation, decreased pistoning
Question 5: What are the disadvantages to a PTB style socket?
CORRECT ANSWER: Concentrated pressures on select few
areas, high pressure on patellar tendon
Question 6: What are the disadvantages to a TSB style socket?
CORRECT ANSWER: Requires the use of liners patient must
be able to don liner, lack of rotational control
Question 7: What are the advantages to locking liner
suspension?
CORRECT ANSWER: Auditory confirmation of lock increase
confidence, can have patient start to don and engage lock while seated, easy to manage volume with socks
Question 8: What are the disadvantages to a locking liner
suspension?
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CORRECT ANSWER: Pistoning/milking of the limb, can be
difficult for patient to align pin and lock must be consistent, lack of a rotational control
Question 9: What are the advantages to a cushion liner/sleeve
suspension?
CORRECT ANSWER: Reduced pistoning of prosthesis, easy
volume management, secure suspension, benefits of liner
Question 10: What are the disadvantages to a cushion
liner/sleeve susupension?
CORRECT ANSWER: Increased bulk around the knee that
can reduce knee flexion, can be hot (extra layer), requires dexterity to use liner
Question 11: What are the advantages to a seal in system for
suspension?
CORRECT ANSWER: Decreased pistoning, increased
proprioception, decreased apparent weight of prosthesis
Question 12: What are the disadvantages to a a seal in system
for suspension?
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CORRECT ANSWER: More difficult to control volume with
socks, must have good balance to don prosthesis, requires exact fit
Question 13: What are the advantages to an elevated vacuum
system?
CORRECT ANSWER: Promotes limb health, decreases
pistoning, increased proprioception, decreased sweating, decreased apparent weight
Question 14: What are the disadvantages to elevated vacuum?
CORRECT ANSWER: Can cause damage to limb if fit is not
appropriate, requires exact fit, bulky and increased weight, expensive
Question 15: What are the advantages of supracondylar
suspension?
CORRECT ANSWER: Good for short limbs, ligament laxity,
knee instability, Improves stability at knee, ease of don and doffing, increased M/L stability