Practical Determination Of The Aligment Reference On The Pelvic Socket - Ottobock 7E10 Helix3D Gebrauchsanweisung

INFORMATION
For use of the C­Leg: Before adjusting the gait parameters on the Helix
also observe the C­Leg Instructions for Use (647H215) and the C­Soft Instruc­
tions for Use (647G268).
For use of the Genium: Before adjusting the gait parameters on the Helix
also observe the Genium Instructions for Use (647G573) and the X­Soft operation
description contained therein. When entering patient data in the 'Alignment' menu
there, ensure that hip disarticulation is selected under 'Residual limb conditions'.
3.1 Practical determination of the aligment reference on the pelvic
socket
For sagittal placement of the pelvic socket in the prosthesis system, determina­
tion of an alignment reference in a neutral pelvic socket position determined under
load is required. In this neutral position (Fig. C) the patient does not feel anteriorly
or posteriorly tilting moments in the sagittal plane, and the pelvic tilt position is as
physiological as possible. Proceed as follows:
1. Adjust the height of the casting table to the ischial tuberosity to ground distance
of the patient.
2. Place the patient with optimally applied pelvic socket without prosthetic compo­
nents with the prosthesis side on the casting table observing the following criteria:
• Bring the middle of the contralateral foot and the middle of the pelvic socket
on the prosthesis side sagittaly in a – p direction on one level.
• Optimally adjust pelvic rotation and pelvic tilt.
3. Lower the plate of the casting table by the height of the reference determination
tool (743A29) (approx. 4.5 cm).
4. Position the reference determination tool between the bottom of the pelvic socket
and casting table according to the following criteria:
Frontal plane:
• Position the reference determination tool (743A29) approximately 5 – 6 cm
laterally to the medial socket trim lines.
Sagittal plane:
• First, place the reference determination tool (743A29) in the maximal anterior
position (patient will feel backward tilt of the pelvis, Fig. A).
• Then, place the cone tip in the maximal posterior position (patient will feel for­
ward tilt of the pelvis, Fig. B).
• Now shift the reference determination tool (743A29) sagittaly in small increments
between the maximal positions. Have any new position described by the test
subject as forward or backward tilt of the pelvis or maybe as neutral position
(see above; Fig. C).
5. Marking of the determined neutral position:
• Mark a vertical pelvic socket reference line sagittaly on the pelvic socket run­
ning through the centre of the reference determination tool (743A29) (also see
laser markings; Fig. C).
• Mark the level of the contralateral greater trochanter on this line.
In the following, these markings will serve as alignment reference (partial mass
centre of gravity).
Helix
hip joint
3D
hip joint
3D
A
B
C
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