Prosthetic Knees


Impact Level
Low Medium and High Impact Scale Icon in BlackHigh
Weight Limit
Approx. 590g
Swing Phase
3 years

Key Features

The Össur NOH5 and NKH5 are polycentric knee units which are geometrically locked at heel strike. At toe-off the knee unlocks to allow a smooth transition into the swing phase. This is controlled by a hydraulic unit with three valves, two controlling the flexion and the third controlling the extension. These are independently adjustable to suit a range of walking speeds. The NOH5 is supplied with a male pyramid adapter to allow angular adjustment. The NKH5 comes with a laminating adapter, complete with adjustable alignment discs, making it particularly suitable for patients with very long residual limbs.

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Read CES OSS K05     Knee Wall Chart

Features & Benefits

  • Polycentric construction provides improved ground clearance in swing phase
  • High stance stability, even when taking small steps, or sidestepping
  • Smooth transition into a controlled and finely adjustable swing phase through two flexion valves and an extension valve
  • Integral extension assist spring and needle roller bearings
  • Unlimited rotation and 5mm of shift in any direction are possible with either version, as is 10°
    of angular adjustment, this being achieved on the NKH5 by means of a pair of wedge shaped rotatable discs

Technical Information

Total Fitted Height (1) Effective Module Height (2) Total Height (3)
NOH5: 158mm NOH5: 105mm NOH5: 17mm
NKH5: 150mm NKH5: 115mm NKH5: 26mm