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Orthotic and Prosthetic Board Prep > BK Px Exam > Flashcards

BK Px Exam Flashcards

1
Q

Pt complains of difficulty rolling over the ball of the foot, most likely cause

A

Excessive PF of the foot

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2
Q

Which portion of stance phase is the Px side in knee extension likely to occur

A

Initial contact

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3
Q

Rehabilitation of the BK amputee should ideally be initialed

A

Preoperatively

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4
Q

When wrapping a BK limb for shrinkage, it is important that

A

Most of the pressure is in the distal end of the limb

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5
Q

Purposes for wearing Px socks (3)

A

-Reducing friction between stump and skin
-Allow padding between stump and skin
-Wick sweat away from skin

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6
Q

PTB cuff suspension strap derives its suspension over which area

A

Proximal patella

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7
Q

Redundant tissue is described as

A

Excessive soft tissue

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8
Q

The A-P measurement of a BK amputee is taken in flexion at

A

15 deg

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9
Q

A-P measurement of the BK amputee is taken between the

A

Patella-tibial tubercle and the medial/lateral hamstrings tendons

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10
Q

M-L dimension of the plaster model when using a soft liner should be

A

Same as measurement

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11
Q

Preferred Px foot and ankle unit for the BK PTB Px

A

SACH

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12
Q

In PTB socket, anterior brim of the socket should extend to the

A

Point midway between upper and lower borders of the patella

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13
Q

In evaluation of a unilateral LE amputee’s ability to utilize a Px successfully, an important consideration is their

A

Balance and coordination on crutches

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14
Q

Pt complains of prolonged anterior distal tibia discomfort

A

Foot too posterior

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15
Q

In order to obtain optimum M-L stability of he PTB during gait, observe that socket diplaces _____ not more than _____” during midstance phase of gait

A

Laterally, 1/2”

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16
Q

As the amputee rolls over the foot in stance phase, his knee joint should

A

Extend slightly

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17
Q

In dynamic alignment, lateral gapping at the socket brim is reduced by

A

Tilting the socket medially

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18
Q

In dynamic alignment, if the knee if forced forward and knee flexion is exaggerated at heel contact, it indicates

A

Socket positioned too far anteriorly

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19
Q

In evaluating the PTB Px during gait, the foot must be flat on the floor at mid-stance, of which the indication is

A

Pylon vertical

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20
Q

If the amputated limb is short, it may be necessary in dynamic alignment to reduce the medial-proximal and lateral-distal forces on the stump by

A

Moving foot lateral

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21
Q

As the outset of the foot is increased in aligning a BK Px, pressures are increased on the following areas of the stump

A

Medial-distal and lateral-proximal

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22
Q

When the BK amputee controls the tendency of the knee to flex after heel strike, the pressures are increased on the following aspects of the stump

A

Anterior-distal and posterior-proximal

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23
Q

Hyperextension of the knee can be decreased by moving the socket ______ in relation to the foot

A

Anterior

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24
Q

2 main functions of the BK cuff suspension strap

A

Maintains the knee in flexion and suspends Px

25
Q

When the foot of a BK is inset, the forces are distributed

A

Proximal/medial and distal/lateral

26
Q

With a BK at mid-stance, where are the pressures (forces) in the socket in the sagittal plane

A

Straight down to the floor

27
Q

Main areas (2) of weight bearing in a BK

A

Patella tendon and medial tibial flare

28
Q

For a very short BK, why is a PTS advantageous

A

Added M-L stability

29
Q

When bench aligning a BK, the M-L foot placement is

A

Inset 1/2”

30
Q

When static aligning a BK, if the pylon leans laterally, the cause may be

A

Too much abduction in the socket

31
Q

What is the effect of moving the socket more forward over the foot

A

Reduces length of anterior lever arm of foot

32
Q

The modification at the medial flare of the tibia is primarily made

A

To aid in vertical loading in the socket

33
Q

What is the effect on gait of lengthening the posterior lever arm of the foot

A

Tends to flex the knee at heel strike

34
Q

Function of a Px foot must simulate motion of a normal foot. If PF or heel compression does not occur

A

Knee stability of the amputee will be affected

35
Q

When the Px foot is placed in excessive DF

A

The knee is made unstable

36
Q

Pts who are converted from side joints and thigh lacer to corsetless PTB commonly exhibit what problem

A

Knee extension throughout stance phase

37
Q

A-P instability of the knee is caused by a tear of the

A

Cruciate ligaments

38
Q

The final factor that determines your selection of heel cushion durometer in a SACH foot is the

A

Compression of heel cushion at heel strike

39
Q

During normal human gait, the primary function of the gluteus medius is

A

Maintain lateral stability of the pelvis

40
Q

Compared to a PTB with cuff suspension, the PTB SC/SP socket offers what advantages (4)

A

-Enhanced M-L stability
-More positive knee extension stop
-Less pistoning during swing phase
-A self-suspending Px

41
Q

In a PTB Px, the BK RL should have the greatest vertical loading force during stance phase concentrated at the

A

Medial flare of the tibia

42
Q

When the counter of the shoe fits too tightly on a SACH foot, which problem can result

A

Less compression of the heel

43
Q

1 week after receiving a new Px, a BK Pt complains of hyperextension of the knee a mid-stance. The most likely cause

A

Pt has changed to a shoe with a lower heel

44
Q

Landmarks that can be used to determine the correct length of a Px

A

-Medial tibial plateau
-Posterior superior iliac spine
-Anterior superior iliac spine
-Iliac crest

45
Q

The anterior stop in a single axis foot substitutes for which muscle

A

Gastrocnemius

46
Q

When a rigid plaster dressing is applied following a BK amputation, the relief pads should be placed

A

To bridge the tibial crest

47
Q

With a PTB Px, excessive knee flexion occurs after heel strike. Which foot and socket adjustments best corrects the problem

A

Move foot anterior and decrease socket flexion

48
Q

On reason for aligning the PTB Px so that the Pt’s knee is partially flexed is to

A

Give the amputee better balance while standing

49
Q

In BK bench alignment, correct M-L placement of the foot with reference to the midline of the socket it

A

Inset up to 1/2” (12mm)

50
Q

Improperly located PTB studs can cause (3)

A

-Swing phase whips
-Inadequate suspension
-Difficulty in sitting

51
Q

The PF bumper substitutes in part for which of the following muscles

A

Tibialis anterior

52
Q

Advantages (3) of a multi-axial Px foot

A

-Absorbs torque
-Accommodates uneven ground
-Minimizes shear forces on the skin

53
Q

When the BK Pt controls the tendency of the knee to flex after heel strike, the pressure are increased on which areas of the limb

A

Distal/anterior and proximal/posterior

54
Q

Compared to a PTB SC, the joints and corset PTB offers with advantages (3)

A

-Enhanced M-L stability
-MOre positive knee extension stop
-Greater WB distribution

55
Q

During dynamic alignment of a PTB, excessive knee flexion occurs at the beginning of heel right. How to correct it

A

Move foot anterior and decrease socket flexion

56
Q

A long posterior flap in a BK amputation secondary to ischemia is preferred because of

A

Better blood supply

57
Q

A tendon that is readily visible or palpable in the popliteal area when the knee is flexed is that of the

A

Biceps femoris

58
Q

During static alignment of a PTB Px, the prosthetist noted that the Pt’s knee was going into hyperextension while standing, even though bench alignment had been correct. The prosthetist should

A

Check the compression of the SACH heel

Orthotic and Prosthetic Board Prep (9 decks)

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