Week 13 TF Socket

Question 1

___ is very important with the transfemoral population when deciding their ability to use a prosthesis.

Answer 1

hip joint strength and ROM (especially extension)

Question 2

what are the main weight bearing areas for the TF population?

Answer 2

greater trochanter and ischial tuberosity

Question 3

Since the TF population does not have an ankle or knee joint where does the majority of their proprioceptive feedback come from?

Answer 3

the hip joint

Question 4

How does the TF populations energy expenditure compare to the TT population?

Answer 4

70-75% more energy is required due to decreased stabilization and rotational control

Question 5

in the quadrilateral socket where does the weight bearing take place?

Answer 5

this socket has a flat posterior shelf to weight bear through the ischial tuberosity and gluteal muscles

Question 6

which TF socket design has narrower anterior/posterior walls vs medial/lateral walls

Answer 6

quadrilateral socket

Question 7

what is a scarpa buldge?

Answer 7

a buildup in a quadrilateral socket that helps spread pressure around the femoral triangle

Question 8

which TF socket design is wider anterior/posteriorly vs medial/laterally?

Answer 8

ischial containment socket

Question 9

which socket design is the most commonly used for the TF population?

Answer 9

ischial containment

Question 10

in the ischial containment socket where does the weight bearing take place?

Answer 10

ischium/ischial ramus and throughout soft tissue of the residual limb

Question 11

what TF socket design is contoured for total contact?

Answer 11

ischial containment

Question 12

which socket design better accommodates fleshy limbs and high activity patients?

Answer 12

ischial containment (compared to quadrilateral)

Question 13

how does the ischial containment socket allow for medial/lateral stability?

Answer 13

the socket design contains the ischial tuberosity and ramus to create a bony block medial/laterally

Question 14

what patient education should be given to a TF patient who is in an ischial containment socket?

Answer 14

education on a routine for skin inspection with the use of a mirror or caretaker.

Question 15

what TF socket design allows for edema and volume variations?

Answer 15

carbon fiber ischial containment socket variation
this uses a flexible inner socket and addition padding as well as has cut outs allowing more muscle movement

Question 16

which type of suction uses positive pressure?

Answer 16

traditional suction

Question 17

what are some disadvantages to traditional suction?

Answer 17

donning may be difficult for those with generalized weakness, poor balance, UE weakness, and cardia issues

Question 18

what are two alternative suction suspensions?

Answer 18

-wet fit: uses lubricant that evaporates creating suction
-gel/seal in liners: act like seal inside the socket

Question 19

what are the indications for suction suspension?

Answer 19

-long residual limbs
-good skin
-good UE strength

Question 20

what are the advantages of suction suspension?

Answer 20

-stable limb volume
-best suspension/decreases pistoning
-better proprioception

Question 21

what are the contraindications for suction suspention?

Answer 21

-volume fluctuation
-short residual limb
-severe scarring
-UE weakness
-requires good SLS

Question 22

what are the disadvantages of suction suspension?

Answer 22

-difficult to don
-hot/lose suspension due to perspiration

Question 23

what is the benefit of using a lanyard system vs pin locking system?

Answer 23

lanyard may provide rotational control
pin locking system has a higher risk of milking effect