Prosthetics

Question 1

Top 2 causes of LE

Answer 1

PVD

Trauma

Question 2

Most common amputation site

Answer 2

TT > TF > TR

Question 3

K levels

Answer 3

K0 - nonambulatory
K1 - limited/household 
K2 - limited community
K3 - community/variable cadence
K4 - children/bilateral/active adults/athletes

Question 4

How often should prosthetic socks/liners be replaced?

Answer 4

6 months

Question 5

SACH foot

Answer 5

kids/durable
several activity levels/weights
can cause knee buckling

Question 6

Single axis foot

Answer 6

accommodates uneven terrain
indicated w/ knee instability
anterior bumper stiffens DF
posterior bumper slows foot drop
CONTRAINDICATED if knee is stable

Question 7

Dynamic response/energy storing foot

Answer 7

long keel lever

high level patients

Question 8

Flexible keel

Answer 8

stops knee buckling of SACH foot
may be multi-axial
Training leg

Question 9

Rotators

Answer 9

additional component that allows leg crossing/donning shoes (TF & proximal)

Question 10

Torsion adapters

Answer 10

good for compliant surfaces

Question 11

What phase of gait cycle do suspension systems help with?

Answer 11

swing phase

Question 12

Supracondylar suspension

Answer 12

gives M-L stability

Indicated for shorter limbs/ligament laxity

Question 13

When is manual locking knee contraindicated?

Answer 13

when anything else works

indicated with bilateral amputees (one leg)

Question 14

Polycentric knee

Answer 14

COR relocates throughout ROM
leg can shorten for swing
knee disartic/short TF

Question 15

weight activated stance control knee

Answer 15

if knee flexed < 10-15 deg brake engages & buckles knee if knee flexes > 15 deg

Question 16

C-leg

Answer 16

in stance hydraulic fluid resistance

in stance its single axis

Question 17

When are anatomic fit suspension systems used?

Answer 17

congenital amputee

Question 18

How many socks should be limit before socket replacement?

Answer 18

> 12 ply

Question 19

Amputee mobility predictor (AMP)

Answer 19

outcome measure that predicts amputee’s ability to ambulate

0-42 points

Question 20

in amputee, when will they need more sock ply, morning or afternoon?

Answer 20

afternoon

Question 21

Do you cover patella in ace wrapping amputee?

Answer 21

do not cover if active/complains of pain when covered

cover if edema in area of patella & short limbs

Question 22

Key muscles to test for TT and TF/KD

Answer 22

TT - quadriceps

TF/KD - hip extensors/abductors

Question 23

Typical contracture with TF/KD

Answer 23

FABER position

Question 24

LisFranc amputation

Answer 24

tarsal-metatarsal joint

Question 25

Syme's amputation

Answer 25

rearfoot with trimming malleoli to create flat surface for weightbearing

Question 26

Specific weight bearing interface

Answer 26

use soft tissue areas to achieve weight bearing & creates reliefs over bony prominences (opposing forces hold limb on)

Question 27

Which pts are good candidates for specific weightbearing prostheses?

Answer 27

``` bony limbs past users preparatory prosthesis medium to short residual limbs pt who require knee stability ```

Question 28

Total surface bearing prosthesis

Answer 28

circumferential pressure provides bearing characteristics - -equal pressure distribution around pressure area - -flow from area of most pressure to least NOT good for hygiene

Question 29

Which pts are good candidates for total surface bearing prostheses?

Answer 29

all lengths/all tissue consistencies pts w/ abnormalities, scar tissues, adherent tissue, chronic breakdown those who want distal attachment suspension systems

Question 30

Hydrostatic prostesis

Answer 30

fluid becomes the soft area drawn distally to provide padding

Question 31

Who should get hydrostatic prostheses?

Answer 31

pts who want distal attachment suspension systems short, fleshy or medium residual limbs active patients

Question 32

Quadrilateral socket design

Answer 32

Not stable coronally I.T. sits on ledge squeezes medial to lateral to prevent lateral shift during gait

Question 33

Ischial ramus containment socket design

Answer 33

I.T. inside socket Stability coronally squeezes anterior to posterior to keep I.T. on shelf less pelvic shift with gait

Question 34

Which muscles are lost from knee disarticulation to transfemoral if cut proximal to adductor tubercle?

Answer 34

``` adductor magnus semimembranosus sartorius gracilis semitendinosus ```