Static Alignment; Adjusting Yield/Stance Resistance - Blatchford Mercury Hi-Activity Instructions D'utilisation

Static Alignment

To achieve optimal function from the Blatchford Hydraulic Control the knee must be
aligned geometrically unstable.
To check
anterior posterior
alignment
a) Load toe of prosthesis
b) Lift lever (stirrup) *
c) Stand with feet side by
side holding onto rails
* This will override the
stance control:
the knee should now feel
on weight bearing
1
Stance Resistance (Yield)
Do not turn the stance adjustment screw anticlockwise beyond 180° position as

Adjusting yield/stance resistance

2mm hex key
Stirrup
(Lever) +
-
180° Minimum
stance resistance
[from fully closed]
0° Maximum
(initial adjustment position is factory set)
stance
resistance
a) Ensure stirrup in Down position
b) Standing with feet side by side try to sit
If excessive resistance reduce resistance
by turning the hex anticlockwise until correct
resistance is felt to sitting naturally
2
Knee unstable during
weight bearing:
a) Drop stirrup
b) Proceed to dynamic
alignment/ next stage
OR
Knee stable during
weight bearing:
accommodated.
If it is:
Slide socket posteriorly
to make knee just
unstable.
Try again
(do not hyperextend limb)
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