Extension Assist
The Certified Extension Assist is a unique Knee Orthosis providing significant extension assist at the knee joint in a prefabricated system. Offered in sizes extra small through extra large, or custom to measurement, scan, or cast.

CRK-7
Product Highlights:
• Provides Significant Extension Assist at Knee Joint
• High quality, low profile polycentric knee joints
• Assist provided by tubing attached medially and laterally
• Tubing extends from proximal thigh cuff through a modified
condyle attachment at knee center to distal cuff
• Strength of extension assist can be varied by simply adjusting the tension on the tubing through the ratchet buckle
• Midscection channel allows complete tension relief for sitting, or progression through the therapy/rehab process
• Removable/Washable Soft Interface Lining
• Prefabricated Sizing XS, S, M, L, XL or
• Custom to Measurement, Scan, or Cast
• Extension Assist Kits can be purchased separately to incorporate into desired KO or KAFO.
Indications & Uses:
• Quad Weakness
• Stabilizing Flaccid Knee
• M/L Instabilities with Knee Weakness
• Contracture Managment
Extension Assist Knee Orthosis
Product# |
Size |
Side |
Calf Cirumference |
Thigh Circumference |
Max Knee Width |
---|---|---|---|---|---|
CRK-7-XSR |
X-Small |
Right |
12"-13" |
15"-16" |
4" |
CRK-7-XSL |
X-Small |
Left |
12"-13" |
15"-16" |
4" |
CRK-7-SR |
Small |
Right |
13"-14" |
17"-18" |
4 1/4" |
CRK-7-SL |
Small |
Left |
13"-14" |
17"-18" |
4 1/4" |
CRS-7-MR |
Medium |
Right |
14"-15" |
19"-20" |
4 1/2" |
CRS-7-ML |
Medium |
Left |
14"-15" |
19"-20" |
4 1/2" |
CRK-7-LR |
Large |
Right |
15"-16" |
21"-22" |
4 3/4" |
CRK-7-LL |
Large |
Left |
15"-16" |
21"-22" |
4 3/4" |
CRK-7-XLR |
X-Large |
Right |
16"-17" |
23"-24" |
5" |
CRK-7-XLL |
X-Large |
Left |
16"-17" |
23"-24" |
5" |
CRK-7-CR |
Custom |
*Custom to Measurment, Cast, or Scan |
|
|
|
CRK-7-CR |
Custom |
*Custom to Measurment, Cast, or Scan |