TF

Question 1

even pressure is applied over the entire RL surface by a socket that is:

Answer 1

shaped to relieve hard areas and compress soft areas

Question 2

how do you calculate the gross AP for an AK Quad socket from patient measurements?

Answer 2

Net AP + 1/2”

Question 3

to accommodate or prevent an adductor roll in a TF fitting, the prosthetist must

Answer 3

bevel the medial wall outward at a 45* angle, & round the bevel over the medial brim while extending the bevel 1” into the socket

Question 4

the AP measurement is the distance between the

Answer 4

adductor longus & the ischial tuberosity

Question 5

an important biomechanics reason for placing the lateral wallow the TF px in adduction is

Answer 5

to place the hip abductors on stretch

Question 6

which muscle on the medial quadrant of the RL is most commonly transected in a TF amputation?

Answer 6

adductor magnus

Question 7

when taking px info for a TF amp who will be fit with a quad socket design, why is the musculature at the gluteal fold recorded?

Answer 7

to establish the posterior to medial wall angle

Question 8

what muscle, that is a primarily a flexor of the knee, becomes a major knee extender in TF amp?

Answer 8

biceps femoris

Question 9

if the ML dimension of the TF quad socket is too large:

Answer 9

the ischial tuberosity will move laterally the ischial seat

Question 10

the prosthetic single axis foot DF bumper substitutes in part for the

Answer 10

Gastrocnemius

Question 11

the lateral wall of the TF socket

Answer 11

is adducted to stabilize the femur

Question 12

the knee type with the MOST inherent stability is the

Answer 12

manual locking knee

Question 13

a SACH foot with a soft heel cushion will

Answer 13

enhance knee stability for the TF px

Question 14

during TF gait in stance phase the hip abductors cause the distal aspect of the femur to

Answer 14

translate or move laterally to stabilize on the lateral wall

Question 15

name a disadvantage of a weight activated, single axis, constant friction prosthetic knee

Answer 15

must unweight to get knee to bend

Question 16

what 2 joint, superficial muscle is responsible for hip flexion & knee extension?

Answer 16

rectus femoris

Question 17

what will cause the ball of the foot to be more than 1.5” off the ground at heel contact?

Answer 17

excessive socket flexion

Question 18

if a TF amputee with a very short RL attempts to use it for lateral stabilization what will happen?

Answer 18

they cannot tolerate the increased & unusually localized pressure

Question 19

when the socket is aligned with initial flexion it lengthens the amputees hip extensors which gives the amputee

Answer 19

greater control of knee stability during the entire stance phase of the walking cycle

Question 20

what does a stiff heel cause at heel contact?

Answer 20

external rotation

Question 21

Ping the foot would have what effect on the TF px?

Answer 21

stabilizing the knee at heel strike, preventing excessive heel compression

Question 22

knee flexion in the hip disarticulation px is initiated with the

Answer 22

posterior hip bumper

Question 23

a pt is c/o crotch pressure & you have already lowered the medial tramline 1/4”. what should you do?

Answer 23

A could be too large. Ischium is slipping off the seat. pad anterior wall

Question 24

if a px has insufficient relief for the gluteus, when would it be most evident?

Answer 24

Midstance

Question 25

a pt comes in c/o lateral distal pressure, what would fix this?

Answer 25

outset the foot w/ relationship to the ischium

Question 26

a pt has firm gluteal musculature. how best to accommodate this?

Answer 26

larger medial-posterior wall angle

Question 27

in a hip disarticulation, what is standard alignment?

Answer 27

line through hip knee axis falls 1.5 " posterior of the foot

Question 28

if a patient is amputated just above the femoral condyles, which muscle would retain its full strength?

Answer 28

adductor magnus

Question 29

during heel strike & foot flat is the reaction line located with relationship to the hip & what muscles are firing?

Answer 29

anterior & hip flexors

Question 30

during standing w/ weight equally distributed the reaction line passes where in relation to the hips?

Answer 30

posterior, medial

Question 31

from mid stance & heel off the hip is _____ & knee _____ to reaction line.

Answer 31

hip posterior, knee moves from anterior to posterior

Question 32

what is the best way to correct an adductor roll?

Answer 32

pull the adductor roll into interface & build up w/ pads until eliminated

Question 33

scraps triangle

Answer 33

sartorius, adductor longus, inguinal ligament

Question 34

at what point does the anterior wall in a TF px undergo the most loading?

Answer 34

heel strike

Question 35

lateral trunk bending may be caused by all of the following except:

Answer 35

knee friction too great

Question 36

what chronic problem arises from an interface that does not provide total contact?

Answer 36

verrucose hyperplasia

Question 37

what gait deviation would arise from inadequate interface flexion?

Answer 37

unequal step length

Question 38

the hip joint lies where with relationship to the trochanter?

Answer 38

anterior & superior

Question 39

the acetabulum is formed by what bones?

Answer 39

ilium, ischium, pubis

Question 40

the gluteus medium is most active during

Answer 40

midstance

Question 41

the toe of an AK px rotate externally at heel strike. which is a major case of this problem?

Answer 41

plantar flexion resistance too firm

Question 42

to minimize lateral trunk bending subsequent to unilateral hip abductor weakness, it is best to use:

Answer 42

a cane on the uninvolved side

Question 43

the body's center of gravity reached it's highest point at

Answer 43

midstance

Question 44

during normal human locomotion between heel contact & foot flat, the floor reaction force tends to cause which moments at the hip & knee?

Answer 44

hip & knee extension

Question 45

if the sciatic nerve was severed at the level of the lesser trochanter, muscle function will not be impaired at the

Answer 45

hip joint

Question 46

which muscle inserts on the lesser trochanter?

Answer 46

iliospsoas

Question 47

in a hip disarticulation, the major function of the iliac crest is

Answer 47

suspension

Question 48

during ambulation, instability of the knee at heel strike with a hip disarticulation may be caused by

Answer 48

heel wedge that is too hard

Question 49

during dynamic alignment the patients trunk bends laterally toward the amputated side indicates what issue?

Answer 49

knee too medial

Question 50

which adductor is always transacted in KD?

Answer 50

gracilis

Question 51

a burning or stretching sensation near the ischial area while sitting is most likely caused by

Answer 51

too narrow AP diameter

Question 52

its with short ak, generally exhibit lateral trunk bending due to

Answer 52

loss of abductors

Question 53

which muscles decelerate the leg before heel strike

Answer 53

biceps femris

Question 54

primary function of the gluteus medium is to

Answer 54

maintain lateral stability of the pelvis

Question 55

when the shoe counter fits too tightly on a sach foot, what happens

Answer 55

posterior lean of pylon