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Designation
Vacuum tube (with vacuum sealing disc)
Vacuum pump
Torque wrench
Torque wrench (adjustable to 0.5 Nm)
3 Procedure
3.1 Selecting the liner
CAUTION
Use of an incorrect liner
Skin irritation due to vacuum on the skin
► Only use liners without a textile cover or with a partial textile cover for fittings with the Harmony system.
The selection of the liner is critical for the quality of the fitting. Ottobock recommends only using polyurethane
liners for Harmony systems. There is a choice between standard liners (off the shelf) and custom liners.
Selecting a standard liner
Harmony System
Reference number
755X104=360
755E9
710D4
–
There are various versions of the standard liners. Liners
without pre-flexion are particularly appropriate for cyl
indrical residual limbs. Liners with pre-flexion have an
anatomical shape and are appropriate for short to medi
um length, slightly conical residual limbs.
Liners without pre-flexion
Measure the residual limb circumference 4 cm
•
above the end of the residual limb.
•
Select the next smaller liner size.
Example:
Measured circumference: 250 mm, selection: 235 mm
Liner with pre-flexion
•
Determine the distance between the MPT (mid
patella tendon) line and the end of the residual limb.
Measure the residual limb circumference 4 cm
•
above the end of the residual limb.
•
Select the corresponding length or the next shorter
one.
Example:
Measured length: 125 mm, selection: 125 mm
Measured length: 135 mm, selection: 125 mm
•
Circumference measured as for liners without pre-
flexion
Procedure
Ottobock | 5
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