Knee Centre Jig
https://www.atpsupply.org/shop/664-w-101-knee-centre-jig-4848
https://www.atpsupply.org/web/image/product.template/4848/image_1920?unique=11f4acd
The compromise center of rotation for accurate location of orthosis joints based on Nietert can be marked directly on the leg. The a-p knee width is divided by the proportion 60:40 at a distance of 25 mm above the gap between tibia and femur.
