Component Selection 12 yr old boy, Responses

Component Selection 12 yr old boy, Responses

Jim Dryden

1/18/2010

Subject: Component Selection 12 yr old boy

I'm asking for component selection advice for a 12 year male, unilateral,
congenital HD, who has worn a prosthesis since one year of age. He's not
sports-minded but typically active for his age. He is currently using all
Otto Bock modular child components (22mm) with a free knee. His weight is
72# which is within the weight limitations but at 59 in height has maxed
out the length of both pylons. I'm concerned about suddenly increasing the
weight of the prosthesis if I must use all adult components. Please suggest
what components you think best fills this void between child and adult
component sizes.

 

Reponses:

 

I am very impressed with the new HD hip joint by Otto Bock. It's action is very impressive. I know that you are looking for smaller component but you might seriously consider this joint.

 

TiMed out of CA has some interesting adaptors that allow you to use both
pediatric and adult components together which may reduce the weight slightly

 

Have you tried using carbon pylon to increase length

 

You can get a solid aluminum rod to fit inside the 22mm pylon tube and tap into it with screws allowing lengthening as the child grows.
At 72 lbs,I agree he is too small for adult components.

 

I believe Fillauer makes a 22 MM pylon with adult adapter that is longer than your standard pediatric pylon. The adult adapter can clamp to a pediatric pyramid.

 

We have also had success using our KINEGEN basic on children-he was an 11
year old boy that was not too active, but had 'out grown' the pediatric
componentry- as far as knees.

 

You should have no issue using adult aluminum components. I think American
and some others even manufacture 30mm to 22mm pyramid interface so you can
use the pediatric knees and feet.

 

Euro International has some pediatric componentry that may be helpful. We
also have an adapter that accepts an adult foot.
Attached please find the Pediatric componentry we offer as well. I have
also had componentry that is very light in weight- anywhere from aluminum or
titanium.

 

Thanks to those that responded.

 

I'm concerned that simply attaching longer pylons will create larger leverages thus exceeding the strength limits of other components (knee and hip joints). I'll find out what Otto Bock has to say about using other manufacturer's components to solve the problem.


Jim Dryden, CPO
Orthopliance Group


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