• Poor control of the prosthesis at heel strike.
• Minimal energy return feeling.
• Knee may buckle.
Actions
• Shift socket posteriorly or foot anteriorly.
• Plantar-flex the foot.
• Review category selection.
Heel too soft
Symptoms
• Foot will come to flat position too early (sinking into a hole feeling).
• Extra energy is required to climb up over the toe.
• Toe will feel too stiff.
• Knee may hyperextend.
Actions
• Shift socket anteriorly or foot posteriorly.
• Dorsi-flex the foot.
• Review category selection.
PROTECTIVE FILM ON PYRAMID
The protective film protects the pyramid from scratching. Remove the
film when the fitting is complete.
CATEGORY SELECTION CHART
Please refer to the selection charts below to determine the appropriate
stiffness required according to Össur recommendations.
WEIGHT KG
WEIGHT LBS
19-20
21-22
23-24
25-26
27-28
29-30
HEEL ASSEMBLY
If it is necessary to replace or service the heel component use Loctite 410
and torque to following specifications:
Size
19–21
22–30
5
45-61
62-80
99-135
136-176
1
2
1
2
1
2
1
2
1
2
N/A
2
Bolt Size
M6
¼"
81-97
98-114
177-214
215-251
N/A
N/A
N/A
N/A
3
3
3
3
Heel Bolt Torque
14 Nm (10ft-lbs)
14 Nm (10ft-lbs)
115-136
252-300
N/A
N/A
4
N/A
4
5
4
5
4
5