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Collamed® OA

Soft osteoarthritis knee brace

  • Inflatable condyle pad
  • Strap system
  • Skin-friendly Airtex material

 Medical specifications

3-point, varus / valgus off-loading soft osteoarthritis knee brace made of Airtex material

Collamed OA is a functional knee soft brace. The product is exclusively to be used for the orthotic fitting of the knee and only on intact skin.


Product benefits

  • Inflatable condyle pad

  • Strap system

  • The physioglide hinge mimics the rolling / gliding movement of the knee and ensures a secure fit.

  • Individually adjustable varus / valgus angle due to inflatable condyle pad

  • Made of elastic, breathable and moisture wicking Airtex material

  • Unproblematic use in contact sports

How does it work?/Mode of action

Correction of the lateral or medial joint space by the 3-point off-loading principle and the inflatable off-loading condyle pad
Pain relief by reducing weight-bearing on the affected joint space
Decreases further joint capsule irritation
Compressive and proprioceptive soft brace
Extension limitation at:  0°, 10°, 20°, 30°, 45°
Flexion limitation at:  0°, 10°, 20°, 30°, 45°, 60°, 75°, 90°, 120°
Immobilisation at:  0°, 10°, 20°, 30°, 45°

Donning/fitting instructions

Open the four straps completely and undo the upper and lower Velcro fasteners. Make sure that the inflatable condyle cushion is correctly positioned on the inside of the brace and is fitted to the side opposite to the affected side of the knee joint.
Sit on the edge of a chair and bend your leg to 45°. Put the brace on your leg from the back and close the two Velcro fasteners tightly. The kneecap should be positioned in the centre of the moulded recess in the brace.
Position the brace joints so that the centres of the hinges (extension wedges) are level with the upper border of the kneecap. Make sure that the brace is not twisted on your leg.
Now fasten the lower two straps, starting with the strap at the back. Then fasten the upper two straps, first the back one and then the front. Keep your knee bent and make sure that the hinges are still in the right position.
Now stand up and move your knee gently a few times. Then tighten the straps in the order given above to stop the brace from slipping.
The inflatable condyle cushion enables you to exert more pressure and thus relieve more pressure on the affected side of the knee. To inflate the cushion press on the white pump on the outside of the brace. To deflate the cushion press in the valve below the joint. The pump is connected to the air cushion with a plug-in valve and can be removed if wished.

Notes for the technician
Fitting the brace
Inspect the shape of the affected leg and take the opportunity to explain to the patient how the Collamed OA works.
Describe to the patient how the brace works by exerting a force to push the knee into a varus or valgus position to relieve the pressure on the affected compartment. Thanks to the brace the patient can expect pain relief of between 65 % and 95 %. However, make it clear that this effect will not occur immediately, but will onset gradually within the next three to four weeks. Remember that the patient’s expectations should remain realistic.
Check and verify the prescription (medial or lateral compartment).
Ask the patient about any acute symptoms and ask him/her to take a few steps. Observe his/her gait carefully. Can you identify any instability of the joint or any varus/ valgus deformity?
Fit the brace to make clear to the patient the difference between walking with and without it.
If possible make a second appointment with the patient after about two weeks. Take this opportunity to show the patient how much progress he/she has made and check that the brace fits properly.

Adjusting the flexion and extension limits (may only be done by the orthopaedic technician)
Extension limitation wedges (extension limit): 0°, 10°, 20°, 30°, 45°
Flexion limitation wedges (flexion limit): 0°, 10°, 20°, 30°, 45°, 60°, 75°, 90°, 120°
Can be locked at: 0°, 10°, 20°, 30°, 45°
The medial (inside) and lateral (outside) settings - in degrees - must always be the same.

Your knee brace comes with 10° extension wedges fitted.
To change the wedges first loosen the screws in the joint cover and take the cover off.
To change the silver extension wedges first loosen the screw and then pull the wedge out from the front of the brace. You will find the replacement wedges in the wedge set, marked with the corresponding setting in degrees. Slide the new extension wedge into the front of the joint. Now replace the screw in the threaded hole and screw it tight.
The flexion wedges are installed from the back. Select the suitable wedge from the wedge set – it is marked with the corresponding setting in degrees. Insert the wedge and tighten the screw.
Move the brace’s joints and check the positions of the wedges. Finally secure the joint cover.
Important information
Only change the flexion and extension limits when your attending doctor tells you to.
In order to prevent hyperextension always insert either extension wedges or the 0° wedge. The centres of the hinges must be level with the upper border of your kneecap. The joint must be positioned behind the midline of the leg on each side.


Standard colours

Material components

Polyamid, elastane

Washing instructions

The fabric parts of the brace can be washed by hand at 30°C. Rinse it in clean water afterwards. Leave out to dry.
Under normal use the brace is maintenance-free. However, after using the brace in water the hinges may be lubricated with Teflon™ spray.
Check regularly that the joint screws are secure, tighten them if necessary.


Medical specifications


  • Conservative treatment of mild to moderate unilateral, medial or lateral osteoarthritis of the knee
  • Overload of medical or lateral compartment
  • Permanent long term care where surgery is contra-indicated


  • Combined lateral and medial osteoarthitis

Further information

File download

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