Otto Bock Harmony P3, Technical Information

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Designation Reference number
Vacuum tube (with vacuum sealing disc) 755X104=360
Vacuum pump 755E9
Torque wrench 710D4
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
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
Ottobock | 5 Harmony System
Procedure