responses; polycentric for PFFD

responses; polycentric for PFFD

Thanks for the responses. Below I have listed the original posting followed
by the responses. I think I could use one of several different knees with
good result but am leaning toward the Total Knee. It was tried during a dynamic
test socket fitting with good result.

Original post:

I'm looking for a light weight polycentric knee for a PFFD with a long symes
type of amputation. Stability is important but getting the knee center as
close to the end of the socket as possible is critical. Any suggestions will be
appreciated.

Responses:

What about the Otto Bock 3R30 or 3R36 id hydraulic needed? These fold up to
bring knee center as high or higher than any other polycentric knee that I'm
aware of and weigh about 730-750 gms.
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how about the total knee from ossur?
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The Mighty Mite (4-Bar) Knee Could be what you want. It has a series of
proximal attachments
The WEIGHT LIMIT is ~132 Pounds.
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I've had success with Seattle's polycentric knees with knee
disarticulation attachment.
Pneumatic (Select) is 862g and the friction swing with spring extension
assist (Natural) is 610g.
************
Have you considered using a TOTAL knee fron Ossur. This is a very stable
knee available in adult and pediatric sizes. Here at Shriners hospital we
have used these knee's with good results and we are able to bring the knee
center very close to the distal aspect of the limb,also of note these knee's
are pretty durable.
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Otto Bock use to carry a Polycentric knee joint used with Joint and thigh
lacer combinations - Becker has some nice Orthotic Knee joints as well - That can
be mounted to the outsides of the socket and thigh section, then down to the
ankle if needed. Granted it is not a high tech solution but I have used this
combination many times in the past with success. This would tend to be more
of an exoskelatal design depending on how the joints are mounted. Endo design
is possible as well. It can be finished up fairly nice as well.
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How about the Medipro Knee with basket attachment (KHP3). It has a high
knee center and I believe A/P M/L slide with plates that can be installed to
allow for angulation. I think SPS carries it.
************
I would look in the DAW cataloge. I have used their 4 bar knees in the past
with good success. They have several versions to meet your patients needs.
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Total Knee with KD attachment, pneumatic version, still seems to be lightest
and closest to knee center.
**************
if the patient is not too heavy, you could consider sidebar joints with
ballbearings and a backcheck. An old but proven system for KD's.
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Thanks again for all the responses.
Eddie White, CP
Beacon Prosthetics and Orthotics
3911 New Bern Ave.
Raleigh NC 27610