Ischial Contaiment Socket Principles, Modification, Setup, and Fitting

Question 1

one of the primary goals of the ischial containment socket is to increase the medial-lateral stability of the socket by the narrow ML design as well as an intimately fitting socket which surrounds the medial aspect of the ischial tuberosity and ramus.

Answer 1

True

Question 2

The skeletal ML (SKML) is:

Answer 2

The dimension as measured from the lateral aspect of the residual limb to the medial aspect of the ischial tuberosity

Question 3

The medial containment wall is one of the key feature of the ischial containment socket. This is the portion of the brim which extends proximally along the medial aspect of the ischial tuberosity and the ischial ramus and the wall of the socket is angled to match the ischial ramus angle.

Answer 3

True

Question 4

The ischial ramus angle is

Answer 4

The angle formed between the ischium/ramus and the line of progression

Question 5

Ischial containment bench alignment requires that

Answer 5

• the socket is set in proper adduction
• the midpoint of the socket at the ischial level should reside centered over the ankle bolt of the prosthetic foot using a level or plumb line in the coronal plane
• the socket be set in proper flexion
• a lateral reference mark located at the midline of the socket at the ischial level should fall directly over the ankle bolt in the sagittal plane

Question 6

The most superior level circumference taken for the ischial containment socket is found at the level of the ischium.

Answer 6

True

Question 7

The soft tissue socket dimension is found at this level.

Answer 7

N/A

Question 8

The skeletal ML or SKML is rectified after the soft tissue or STML has be established on the model.

Answer 8

True

Question 9

Proper coronal alignment of the ischial containment socket places the foot (ankle bolt) directly under the ischium.

Answer 9

True