Prosthetic CPM EXAM ACTUAL
QUESTIONS AND CORRECT ANSWERS
TF Bench Alignment - Correct answers✔5* socket flexion (+contracture)
6-7* socket adduction (or match sound)
Socket medial wall parallel to line of progression
Knee: 5-25 mm posterior to weightline, external rotation 3-5*
Foot: 12-37mm outset from IT, 5-7* external rotation
TT Bench Alignment - Correct answers✔5* socket flexion (+contracture)
5* socket adduction (or match sound)
Foot: 37mm posterior to midline (SACH) or 1/3 of foot (DR)
Foot: 12 mm inset to midlineder
Info for Px Eval - Correct answers✔Name, Age, DOB, Sex
Ht, Wt
Meds, comorbidities
Amp site/cause/date
ADLs/vocational/avocational Goals!
Home status/environment
Work status/environment
PT/OT, assistive devices used
Current/previous px treatment
MMT, ROM
Sensation
,Condition of residual limb
Condition of contralateral/upper extremities
K-level/AMP
K0 - Correct answers✔The patient does not have the ability or potential to ambulate or transfer
safely
K1 - Correct answers✔Prosthesis for transfers or ambulation at fixed cadence; household
ambulator
K2 - Correct answers✔Ability to traverse low level environmental barriers; limited community
ambulator, fixed cadence
K3 - Correct answers✔Ambulation at variable cadence; prosthetic utilization beyond simple
locomotion; "unlimited" community ambulator, traverse most environmental barriers
K4 - Correct answers✔Exceeds basic ambulation skills, exhibiting high impact, stress, or energy
levels; child, active adult, or athlete.
K1 feet - Correct answers✔SACH, Single axis, safe
K2 feet - Correct answers✔Multiaxial, flexible keel
K3-4 - Correct answers✔Dynamic response (also often multiaxial)
With vertical shock
Shock & torque absorbers
, External power feet - Correct answers✔K1-3, all cadence/terrain
Pros: propulsion, dorsi/plantarflexion
Cons: batteries/weight/cost/processing speed
Single axis feet - Correct answers✔Pros: inexpensive, durable
Cons: rigid forefoot, not energy efficient, not suitable for uneven surfaces
SACH feet - Correct answers✔Pros: provides stability in early stance
Cons: DF stop increases knee hyperextesion
Flexible keel - Correct answers✔Pros: provides easy rollover, smooth transition from heel strike
to toe off, allows natural sagittal plane motion, reduces socket foreces on residual limb, improves
walking safety, reliable
Cons: limited push off, increased cost
Multiaxial feet - Correct answers✔Pros: Accommodates uneven terrain, decreases stress on skin
and prosthesis
Con: Increased weight/maintenance, cost
Dynamic Response feet - Correct answers✔Pros: use with increased activity level, energy
storing, reduces impact to joints and the residual limb, decreased walking effort/increased push
off
Cons: increased cost/weight
K1-K2 knees - control - Correct answers✔Fiction/mechanical - single speed ambulators
QUESTIONS AND CORRECT ANSWERS
TF Bench Alignment - Correct answers✔5* socket flexion (+contracture)
6-7* socket adduction (or match sound)
Socket medial wall parallel to line of progression
Knee: 5-25 mm posterior to weightline, external rotation 3-5*
Foot: 12-37mm outset from IT, 5-7* external rotation
TT Bench Alignment - Correct answers✔5* socket flexion (+contracture)
5* socket adduction (or match sound)
Foot: 37mm posterior to midline (SACH) or 1/3 of foot (DR)
Foot: 12 mm inset to midlineder
Info for Px Eval - Correct answers✔Name, Age, DOB, Sex
Ht, Wt
Meds, comorbidities
Amp site/cause/date
ADLs/vocational/avocational Goals!
Home status/environment
Work status/environment
PT/OT, assistive devices used
Current/previous px treatment
MMT, ROM
Sensation
,Condition of residual limb
Condition of contralateral/upper extremities
K-level/AMP
K0 - Correct answers✔The patient does not have the ability or potential to ambulate or transfer
safely
K1 - Correct answers✔Prosthesis for transfers or ambulation at fixed cadence; household
ambulator
K2 - Correct answers✔Ability to traverse low level environmental barriers; limited community
ambulator, fixed cadence
K3 - Correct answers✔Ambulation at variable cadence; prosthetic utilization beyond simple
locomotion; "unlimited" community ambulator, traverse most environmental barriers
K4 - Correct answers✔Exceeds basic ambulation skills, exhibiting high impact, stress, or energy
levels; child, active adult, or athlete.
K1 feet - Correct answers✔SACH, Single axis, safe
K2 feet - Correct answers✔Multiaxial, flexible keel
K3-4 - Correct answers✔Dynamic response (also often multiaxial)
With vertical shock
Shock & torque absorbers
, External power feet - Correct answers✔K1-3, all cadence/terrain
Pros: propulsion, dorsi/plantarflexion
Cons: batteries/weight/cost/processing speed
Single axis feet - Correct answers✔Pros: inexpensive, durable
Cons: rigid forefoot, not energy efficient, not suitable for uneven surfaces
SACH feet - Correct answers✔Pros: provides stability in early stance
Cons: DF stop increases knee hyperextesion
Flexible keel - Correct answers✔Pros: provides easy rollover, smooth transition from heel strike
to toe off, allows natural sagittal plane motion, reduces socket foreces on residual limb, improves
walking safety, reliable
Cons: limited push off, increased cost
Multiaxial feet - Correct answers✔Pros: Accommodates uneven terrain, decreases stress on skin
and prosthesis
Con: Increased weight/maintenance, cost
Dynamic Response feet - Correct answers✔Pros: use with increased activity level, energy
storing, reduces impact to joints and the residual limb, decreased walking effort/increased push
off
Cons: increased cost/weight
K1-K2 knees - control - Correct answers✔Fiction/mechanical - single speed ambulators
