Finishing The Prosthesis; Maintenance; Maintenance Instructions - Otto Bock Helix3D 7E10 Instructions For Use Manual

3.8 Finishing the prosthesis

The 3S27=L/R44 Foam Cover can be used for finishing the pelvic socket prosthesis. Allow a 60 mm "compres­
sion allowance" to minimise the protective foam cover's effect on knee function. When determining the proper
cover length, increase the linear thigh dimension by 30 mm and the linear shin dimension by the same amount.
Use 710D4 Torque Wrench to finish the prosthesis and secure all set screws with 636K13 Loctite. Please observe
the following torques:
501F9=* Flat headed screws on the lamination plate
(with Torx socket)
Small cap screw of lamination adapter
Set screws of rotation adapter 4R57
All other set screws
Finally, verify once again that all adjustments are optimal by having the prosthesis wearer walk with the finished
prosthesis. If necessary, readjust the prosthesis to compensate for influences by the foam cover.

3.9 Maintenance

Replacing the expansion springs
To support the swing phase (flexion), the joint contains tension springs on the left and right (order no.: 4G430,
red). These springs store energy during extension of the Helix
at the beginning of flexion. This results in significantly faster initiation of hip flexion and larger ground clearance
during the swing phase. Two additional normal tension springs (order no.: 4G430, red) and two stronger tension
springs (order no.: 4G430=2, grey) are included.
Worn or defective expansion springs can be replaced as follows:
1. First open the front cap.
2. Then replace the defective expansion springs with new ones.
INFORMATION
To remove the expansion springs, use a slotted screwdriver without sharp
edges!
Before installing the 4G430 or 4G430=2 expansion springs, the eyelets of
the expansion spring must be greased throughly with 633F30 special grease
(Fig. 1).
3. Close the cap and insert the attachment pins in the lower section.
3.10

Maintenance instructions

Please make your patients aware of the following safety instructions:
CAUTION
Risk of injury as a result of excessive strain. Depending on the environment and usage conditions, the func­
tionality of the hip joint may be impaired. To reduce the risk for the patient, the hip joint must not be used after
noticeable functional changes have occured.
Noticeable functional changes may include poor response, incomplete extension, diminished stance phase sta­
bility, deteriorating swing phase behaviour, abnormal noises, etc.
Measure: Have the prosthesis inspected by a prosthetist.
Helix
Screws
25 Nm (Wrench/Bit TX 40)
2 Nm
10 Nm / Torque above the rotation adapter
15 Nm
Hip Joint in the stance phase and return the energy
3D
Torque
Ottobock | 45
1