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CrossFire OA™ CrossFire OA™ CrossFire OA™ CrossFire OA™
CrossFire OA™

CrossFire OA™

Part Number 5190     HCPCS L1851

Dynamic Unloading Brace
The CrossFire OA is a lightweight, low-profile, knee brace for people with tibiofemoral and/or patellofemoral OA pain.
- Clinically validated pain relief
- High patient satisfaction
- Easy to fit, apply, and use Learn more

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Billing Information Back to Top

HCPCS Code L1851

PDAC Coding Verification Not Required

Description Back to Top
The CrossFire OA combines unloading in the tibiofemoral joint with realignment in the patellofemoral joint.

Tibiofemoral: The CrossFire OA uses a three-point leverage system and a non-elastic strap to pull the knee out of varus or valgus and decrease pain.¹
Patellofemoral: Among patients with tibiofemoral OA, 91% also have radiographic patellofemoral OA.² BioSkin's Q strap has been clinically proven to decrease pain in the PF joint by supporting proper patellar alignment and increasing joint surface contact.³

The lightweight hinge and thin, breathable materials yield a product that is comfortable and easy to wear, even under clothing. The strap and buckle design makes donning and doffing easy for patients who struggle with dexterity. The CrossFire OA is also designed for longevity with easily replaceable Velcro panels so the patient can get years of use from the same brace.

1. Petersen, Wolf et al. “Biomechanical effect of unloader braces for medial osteoarthritis of the knee: a systematic review (CRD 42015026136)” Archives of orthopaedic and trauma surgery vol. 136,5 (2016): 649-56.
2. Duncan R, Hay EM, Saklatvala J, Croft PR. Prevalence of radiographic osteoarthritis: it all depends on your point of view. Rheumatology (Oxford). 2006;45(6):757–760.
3. Callaghan, M. et al. "Beneficial effects of a brace for patellofemoral OA: results of a randomised trial” Osteoarthritis and Cartilage vol. 21 (2013): S23

Application Instructions Back to Top

1. Insert leg through the inner knee sleeve (optional), positioning the hinge at the mid patella. For medial application, place the hinge on the inside of the knee. For lateral application, place the hinge on the outside of the knee.

2. Sitting on the edge of a chair, adjust the front closure flaps to a comfortable level of compression. We recommend securing the lower flaps first for easy application.

- If using the Q strap, apply it to the brace before securing the front-closure flaps closest to the patella. Attach the Q Strap between the donning sleeve and outer flaps on the lateral side of the patella with the Velcro hook facing upward. The two ends of the strap are then attached over proximal and distal ends of the hinge uprights so the strap puts gentle, adjustable pressure on the lateral aspect of the patella.. Then close the front-closure flaps and continue the application process.

3. Gently pull the spiral strap behind your calf, around your knee, and over the top of your thigh and attach the magnetic buckle.

4. Place your foot flat on the ground with your heel slightly in front of your knee and then apply tension to the spiral strap. Pull just enough to apply tension to the strap; be sure not to over-tighten.

5. Test joint unloading by extending leg.

If more unloading is desired, tension the strap a little bit more. A little bit goes a long way. If less unloading is desired, slightly loosen the strap.

To remove the brace, bend the knee to release tension in the spiral strap and lift the tab on the magnetic buckle to detach. This will keep the strap at the correct tension mark for repeatable tension of the strap. Undo the front closure flaps and remove the brace.


Fitting Guide Back to Top

Knee Sizing Chart

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