Week 1 Quiz

Question 1

What is the most common etiology for lower limb amputation?

Answer 1

Dysvascular disease or vascular compromise

Question 2

For dysvascular amputations, what is the most common level of lower limb amputation?

Answer 2

Foot/ankle/toe

Question 3

TRUE OR FALSE
Cancer is the most common etiology for hip disarticulation

Answer 3

TRUE

Question 4

According to the ABC practice analysis survey in 2015, what is the most common K level of patients with lower limb amputation who are treated by prosthetists?

Answer 4

K3

Question 5

What are possible indications or causes for transtibial amputations?

Answer 5

• uncontrollable sepsis
• non-reconstructable dysvascular limb
• malignancy in which limb salvage is not an option
• chronic pain unresolved with traditional methods

Question 6

MESS stands for _ and surgeons use it to _

Answer 6

• Mangles Extremity Severity Score
• determine whether to amputate or salvage a limb following a traumatic accident

Question 7

Reasons a surgeon would amputate at a higher level, resulting in a shorter limb

Answer 7

• loss of vascularity
• loss of soft tissue envelope
• provide adequate build height for components

Question 8

Reasons surgeon would amputate at a lower level, resulting in longer limb

Answer 8

maintain a lever arm

Question 9

What is the most commonly performed transtibial amputation surgery type

Answer 9

posterior flap method

Question 10

what term is used to describe soft tissue on a healed residual limb that extends in length well beyond the cut end of the bone

Answer 10

redundant tissue

Question 11

Benefits of using a rigid dressing compared to soft dressing

Answer 11

• reduction in falls/injury
• reduced knee flexion contractures
• reduced edema
• reduced healing time
• reduced time to fitting
• reduced pain

Question 12

TRUE OR FALSE
Graded compression should be highest at the proximal end of the residual limb and gradually reduce as the garment extends distally

Answer 12

FALSE

compression should be greatest at distal end

Question 13

Main fucntions of transtibial prosthetic socket

Answer 13

• rigid attachment for components
• facilitate force transfer from patient to ground
• protect RL from forces

Question 14

What was the residual limb skin issue with open ended “plug fit” sockets that led to the development of the PTB socket

Answer 14

Verrucous Hyperplasia

Question 15

What are the weight tolerant areas on a transtibial level RL

Answer 15

• Patellar tendon
• Medial Tibial Flare
• Anterior Compartment
• Gastrocnemius
• Popliteal Fossa
• Fibular Shaft
• Distal end (if enough soft tissue)

Question 16

The height of the center of the posterior trim line on a PTB socket is _ proximal to _ in order to provide a counter force to _ pressure

Answer 16

• 12 mm
• MPT
• PTB

Question 17

What is the primary indication for PTB-SCSP socket

Answer 17

limit or stop knee hyperextension in late stance

Question 18

_ ensures that there are not areas without contact from the socket, but loading can be higher in some areas than others.

_ ensures there are not areas without contact from the socket, but all areas are laoded equally

Answer 18

• Total Contact
• Total Surface Bearing

Question 19

_ shanks achieve rigidity from a center structure
_ shanks achieve rigidity from an external shell

Answer 19

• endoskeletal
• exoskeletal

Question 20

In order for successful suspension of a PTB-SC socket the ML-PML difference must be at least _ , with the _ greater than the _

Answer 20

• 12 mm
• ML
• PML

Question 21

Why would a PTB-SC be used

Answer 21

ML-PML is >= 25 mm

Question 22

Over which anatomical structure does a supracondylar cuff suspend?

Answer 22

• Patella

Question 23

Select every answer that is an advantage of a locking liner suspension

Answer 23

• audible click
• easy to don
• easy to accommodate volume changes