Friday, May 27, 2022

Prosthetic problem

Wyn Lewis

Possibe solution to allow increased Knee flexion.

I’m a trans tibial amputee and a qualified Prosthetist/Orthotist. With

refrence to you’re problem of knee flexion. In my spare time I climb and

use a rowing machine in the gym of which both activities require

repeated and full flexion at the knee. Over the years what I have found

that works for me is Iceross suspension with an Ossur Varilock K-175400.

When making the socket I found the width of the posterior opening to be

crucial rather than lowering the height of the posterior shelf. When the

knee is fully flexed it can draw on the end of the residual limb this

can be aliviated by reliesing the lock just enough to stop the drawiung

effect. Another alternative to the lock is the lanyard K-391000 this

might be better as it is infinately adjustable and the leg will not fall

off if the release button is pushed. All my sockets have been cast using

the Otto Bock Dynamic method, the proximal trim lines are kept low

however they do brovide a minimum amount of suspension.

Finally Years ago I saw someone with a similar problem who rode a

motorbike, his prosthesis had a posterior section which he could move

out of the way when he required to ride the bike.

Hope this information will provide you with a solution.

Wyn

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