Good Afternoon,
Some of you may be familiar with the Shark Tank KaZAM, the Glide, and strider style bikes for very young children. These bikes have no foot petals which makes it very easy for some very young children to learn the concept of balance on a bicycle.
We have a four year old with a knee disarticulation amputation that wants to ride one of these bikes. He currently has room for an (optional lock) polycentric child’s knee, however the knee might work best for the bike activity if it was locked in 35-40 degrees of flexion. If locked in full knee extension or full knee flexion, he will have trouble propelling the bike and maintaining balance. If the prosthetic knee is left unlocked, he fears falling because with any knee flexion and weight bearing, the knee will collapse.
We have a crude method to selectively limit knee flexion on the polycentric prosthetic knee, but were curious if there are better methods available to us.
Appreciate your input,
Edward Skewes CPO
Pediatric Orthotic and Prosthetic Services LLC, Southeast- Greenville
Shriners Hospital for Children
Greenville SC
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