Prosthetics Amputations

Question 1

Describe K0 and what prosthetics are recommended?

Answer 1

No potential to ambulate/transfer. Bedbound.
No prosthetic.

Question 2

Describe K1 and what prosthetics are recommended?

Answer 2

Ambulate level surfaces. Limited household amb.
Manual lock or stance control knee
SACH or single axis foot

Question 3

Describe K2 and what prosthetics are recommended?

Answer 3

Ambulate some environmental barriers. Limited community amb.
Pneumatic or polycentric knee
Multi axis foot

Question 4

Describe K3 and what prosthetics are recommended?

Answer 4

Community amb.
Hydraulic or microprocessor knee
Energy storing foot

Question 5

Describe K4 and what prosthetics are recommended?

Answer 5

Ability for participation that exceeds basic ambulation. Child, athlete.
Hydraulic or microprocessor knee
Energy storing foot
High-activity knee frame

Question 6

Mortality rate for unilateral BKA

Answer 6

30 days = 17%
1 year = 35%
5 years = 75%

Question 7

Mortality rate for unilateral AKA

Answer 7

30 days = 27%
1 year = 54%
5 years = 77%

Question 8

Mortality rate for multiple major amputation

Answer 8

30 days = 23%
1 year = 45%
5 years = 80%

Question 9

Energy Consumption: unilateral BKA (2 different % from each lecture)

Answer 9

10-20%
23%

Question 10

Energy Consumption: unilateral AKA (2 different % from each lecture)

Answer 10

60-70%
99%

Question 11

Energy Consumption: bilateral BKA (2 different % from each lecture)

Answer 11

20-40%
41%

Question 12

Energy Consumption: bilateral AKA

Answer 12

> 200%

Question 13

WB areas for PTB Sockets (for BKA)

Answer 13

Pat tdn
Pretibial muscle mass
Lateral fibula
Popliteal fossa

Question 14

WB areas for trans-femoral sockets

Answer 14

Isch Tub
Glut muscles
Lateral thigh

Question 15

Foot Slap causes

Answer 15

Soft PF bumper (soft heel)

Question 16

Foot ER at Heel Strike causes

Answer 16

Heel too firm.

Question 17

Knee Instability correction

Answer 17

Decrease degree of DF.
Decrease anterior translation of socket.

Question 18

Knee Hyperext causes

Answer 18

Heel cushion too soft.
Heel/toe lever too long or too firm.

Question 19

Excessive Varus causes

Answer 19

Too much inset.
Hypermobile LCL

Question 20

Excessive Valgus causes

Answer 20

Insufficient inset.
Hypermobile MCL

Question 21

Socket ABD/Add causes

Answer 21

ABD: walking on lat side of foot.
Add: walking on med side of foot.
Due to degree of ankle inversion/eversion.

Question 22

Drop Off looks like

Answer 22

Sudden knee flex in late stance phase

Question 23

Drop Off causes

Answer 23

Heel/toe lever too soft or too short.
Heel height too high.
Prosthetic too short.

Question 24

Vaulting looks like

Answer 24

Excess PF on non-prosthetic side to clear prosthetic limb.

Question 25

Vaulting causes

Answer 25

Prosthetic too long

Question 26

Pistoning looks like

Answer 26

Tibia moves vertical during WB vs NWB phases.

Question 27

Pistoning causes

Answer 27

Socket too big. Not wearing enough socks.

Question 28

Excessive Hip ABD or Circumduction causes

Answer 28

Medial rim of socket too hight up, jams into skin. Increased volume of residual limb. Extreme knee flex resistance (not enough knee flex).

Question 29

Terminal Impact looks like

Answer 29

Audible clunk at end of terminal swing phase. Knee flings into extension.

Question 30

Terminal Impact causes

Answer 30

Inadequate knee ext resistance

Question 31

Unequal Step Length causes

Answer 31

Insufficient socket flexion (should be 5°). Often associated w/ lumbar lordosis.

Question 32

Excess Pelvic Elevation (hip hiking) causes

Answer 32

Prosthesis too long, insufficient knee friction

Question 33

Medial Whip looks like

Answer 33

Heel moves closer to midline during toe-off.

Question 34

Medial Whip causes

Answer 34

Knee axis in excessive ER. Prosthesis incorrectly donned in ER.

Question 35

Lateral Whip looks like

Answer 35

Heel flings out laterally at beginning of swing phase.

Question 36

Lateral Whip causes

Answer 36

Knee axis in excessive IR. Prosthesis incorrectly donned in IR.

Question 37

Lateral Trunk Bending (toward prosthetic side) causes

Answer 37

Prosthetic foot excessively out-set. Prosthetic too short. Socket ABD. Antalgic compensation for bone spur. Weak hip ABD.

Question 38

Excessive Heel Rise causes

Answer 38

Inadequate knee flexion resistance

Question 39

Best suspension system for ML stability?

Answer 39

Joint thigh corset

Question 40

Which suspension systems offer no or limited ML stability? (3)

Answer 40

Cuff Sleeve Waist Belt

Question 41

Best suspension system for reducing pistoning? (4)

Answer 41

PTB-SP/SC PTB-SC Sleeve Silicone + Pin

Question 42

Which suspension systems offer the most flexion ROM and limit shear forces? (2)

Answer 42

Silicone Suction Silicone Vacuum