Survey of Single Axis Knee Mechanisms

Question 1

In the transfemoral prosthesis, the alignment of the single axis knee is only critical in the sagittal plane.

Answer 1

False

Question 2

In the sagittal plane, the alignment of the single axis knee axis is posterior to the trochanter/ankle (TA) line. This can vary depending on the control mechanism being used. In most cases, the knee axis is placed posterior to the TA line by approximately

Answer 2

1/4”

Question 3

The stance control feature on the Otto Bock 3R15 modular single axis knee joint operates when the knee is in full extension and up to twenty degrees of flexion.

Answer 3

True

Question 4

A single axis swing and stance phase control knee is often referred to as a “safety knee” and, if properly aligned, will never buckle.

Answer 4

False

Question 5

According to Medicare, a hydraulic swing rate control mechanism knee is only appropriate for individuals who:

Answer 5

Have variable cadence