Prosthetic CPM (Certified Prosthetic Management) Exam
2025 | Comprehensive Study Guide with Verified Questions
& Answers
What are the advantages to a PTB style socket? – AnswerRotational Control,
Relief over bony prominences
What are the advantages to a TSB style socket – AnswerEqual 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? – AnswerConcentrated
pressures on select few areas, high pressure on patellar tendon
What are the disadvantages to a TSB style socket – AnswerRequires the use
of liners patient must be able to don liner, lack of rotational control
What are the advantages to locking liner suspension – AnswerAuditory
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 –
AnswerPistoning/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 –
AnswerReduced pistoning of prosthesis, easy volume management, secure
suspension, benefits of liner
, What are the disadvantages to a cushion liner/sleeve susupension –
AnswerIncreased 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 –
AnswerDecreased pistoning, increased proprioception, decreased apparent
weight of prosthesis
What are the disadvantages to a a seal in system for suspension? –
AnswerMore 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 – AnswerPromotes
limb health, decreases pistoning, increased proprioception, decreased
sweating, decreased apparent weight
What are the disadvantages to elevated vacuum – AnswerCan cause damage
to limb if fit is not appropriate, requires exact fit, bulky and increased weight,
expensive
What are the advantages of supracondylar suspension – AnswerGood 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? – AnswerEasily adjusted if
volume change, good secondary suspension, low maintenance
What are the disadvantages to Supracondylar suspension? – AnswerMust be
able to tolerate pressure, pistoning, rubbing on condyles
2025 | Comprehensive Study Guide with Verified Questions
& Answers
What are the advantages to a PTB style socket? – AnswerRotational Control,
Relief over bony prominences
What are the advantages to a TSB style socket – AnswerEqual 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? – AnswerConcentrated
pressures on select few areas, high pressure on patellar tendon
What are the disadvantages to a TSB style socket – AnswerRequires the use
of liners patient must be able to don liner, lack of rotational control
What are the advantages to locking liner suspension – AnswerAuditory
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 –
AnswerPistoning/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 –
AnswerReduced pistoning of prosthesis, easy volume management, secure
suspension, benefits of liner
, What are the disadvantages to a cushion liner/sleeve susupension –
AnswerIncreased 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 –
AnswerDecreased pistoning, increased proprioception, decreased apparent
weight of prosthesis
What are the disadvantages to a a seal in system for suspension? –
AnswerMore 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 – AnswerPromotes
limb health, decreases pistoning, increased proprioception, decreased
sweating, decreased apparent weight
What are the disadvantages to elevated vacuum – AnswerCan cause damage
to limb if fit is not appropriate, requires exact fit, bulky and increased weight,
expensive
What are the advantages of supracondylar suspension – AnswerGood 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? – AnswerEasily adjusted if
volume change, good secondary suspension, low maintenance
What are the disadvantages to Supracondylar suspension? – AnswerMust be
able to tolerate pressure, pistoning, rubbing on condyles
