14
Fig. 12
Three methods are available according to application of body weight:
When body weight is applied to the heel, yielding function can work.
When body weight is applied to the toe, yielding function can not work.
After fully applying body weight to the heel, when an amputee shifts
body weight toward the toe while yielding function is retained,
hydraulic resistance is sustainable.
POINT 1:
How to Obtain Yielding Function
A
A
B
C
B
C
Yielding ON
OFF
ON
Body weight shift
ON
Sustainable
1
Make sure that the scale reads 10 at the projection
on the window. Then let the amputee stand within
parallel bars. (Fig. 12)
3
Have the amputee feel two different levels of
yielding strength by adjusting the scale as follows.
(1) Scale reading 0* (strongest)
(2) Scale reading 15 (weak)
*:
The reading “0” is where the plug is fully closed by
turning clockwise.
Procedure
2
Have the amputee place his or her weight on the
prosthesis and confirm that yielding function
works properly.
J
See .
POINT 1
4
Taking the reading 10 as the benchmark, finely adjust the adjusting plug
and choose a desirable level of strength.
J
See .
POINT 2
