Prosthetics Amputations Flashcards
Describe K0 and what prosthetics are recommended?
No potential to ambulate/transfer. Bedbound.
No prosthetic.
Describe K1 and what prosthetics are recommended?
Ambulate level surfaces. Limited household amb.
Manual lock or stance control knee
SACH or single axis foot
Describe K2 and what prosthetics are recommended?
Ambulate some environmental barriers. Limited community amb.
Pneumatic or polycentric knee
Multi axis foot
Describe K3 and what prosthetics are recommended?
Community amb.
Hydraulic or microprocessor knee
Energy storing foot
Describe K4 and what prosthetics are recommended?
Ability for participation that exceeds basic ambulation. Child, athlete.
Hydraulic or microprocessor knee
Energy storing foot
High-activity knee frame
Mortality rate for unilateral BKA
30 days = 17%
1 year = 35%
5 years = 75%
Mortality rate for unilateral AKA
30 days = 27%
1 year = 54%
5 years = 77%
Mortality rate for multiple major amputation
30 days = 23%
1 year = 45%
5 years = 80%
Energy Consumption: unilateral BKA (2 different % from each lecture)
10-20%
23%
Energy Consumption: unilateral AKA (2 different % from each lecture)
60-70%
99%
Energy Consumption: bilateral BKA (2 different % from each lecture)
20-40%
41%
Energy Consumption: bilateral AKA
> 200%
WB areas for PTB Sockets (for BKA)
Pat tdn
Pretibial muscle mass
Lateral fibula
Popliteal fossa
WB areas for trans-femoral sockets
Isch Tub
Glut muscles
Lateral thigh
Foot Slap causes
Soft PF bumper (soft heel)
Foot ER at Heel Strike causes
Heel too firm.
Knee Instability correction
Decrease degree of DF.
Decrease anterior translation of socket.
Knee Hyperext causes
Heel cushion too soft.
Heel/toe lever too long or too firm.
Excessive Varus causes
Too much inset.
Hypermobile LCL
Excessive Valgus causes
Insufficient inset.
Hypermobile MCL
Socket ABD/Add causes
ABD: walking on lat side of foot.
Add: walking on med side of foot.
Due to degree of ankle inversion/eversion.
Drop Off looks like
Sudden knee flex in late stance phase
Drop Off causes
Heel/toe lever too soft or too short.
Heel height too high.
Prosthetic too short.
Vaulting looks like
Excess PF on non-prosthetic side to clear prosthetic limb.
Vaulting causes
Prosthetic too long
Pistoning looks like
Tibia moves vertical during WB vs NWB phases.
Pistoning causes
Socket too big.
Not wearing enough socks.
Excessive Hip ABD or Circumduction causes
Medial rim of socket too hight up, jams into skin.
Increased volume of residual limb.
Extreme knee flex resistance (not enough knee flex).
Terminal Impact looks like
Audible clunk at end of terminal swing phase. Knee flings into extension.
Terminal Impact causes
Inadequate knee ext resistance
Unequal Step Length causes
Insufficient socket flexion (should be 5°).
Often associated w/ lumbar lordosis.
Excess Pelvic Elevation (hip hiking) causes
Prosthesis too long, insufficient knee friction
Medial Whip looks like
Heel moves closer to midline during toe-off.
Medial Whip causes
Knee axis in excessive ER.
Prosthesis incorrectly donned in ER.
Lateral Whip looks like
Heel flings out laterally at beginning of swing phase.
Lateral Whip causes
Knee axis in excessive IR.
Prosthesis incorrectly donned in IR.
Lateral Trunk Bending (toward prosthetic side) causes
Prosthetic foot excessively out-set.
Prosthetic too short.
Socket ABD.
Antalgic compensation for bone spur.
Weak hip ABD.
Excessive Heel Rise causes
Inadequate knee flexion resistance
Best suspension system for ML stability?
Joint thigh corset
Which suspension systems offer no or limited ML stability? (3)
Cuff
Sleeve
Waist Belt
Best suspension system for reducing pistoning? (4)
PTB-SP/SC
PTB-SC
Sleeve
Silicone + Pin
Which suspension systems offer the most flexion ROM and limit shear forces? (2)
Silicone Suction
Silicone Vacuum
