Knee hyperext.replies Part 1
Shane Jansen
Description
Collection
Title:
Knee hyperext.replies Part 1
Creator:
Shane Jansen
Date:
7/18/2001
Text:
Dear List Members
Thanks so much for your responses.
Sorry for the delay in posting them but I had some trouble compiling and
sending them.
The replies are seperated by a dotted line.
My original post is at the end of part 2.
Regards
Shane Jansen
---------------------------------------------
Isn't it so that part of the problems with HE is related to spasticity
of the calf muscles (cfr. control is possible when they walk slow)? If
you have an equinus of the foot which can be corrected passively,
but quick stretch reveals a stretch response of the calf, a tuned
AFO could help.
--------------------------------------------
I use a verity of KO and KAFO designs that are made from very rigid composite
shells. I integrate industry standard joints into the orthosis. For
hyperextension, I recommend a single axis/stainless joint head that is sized
appropriate for the application.
----------------------------------------------
Shane:
ipos offers very thin light-weight polycentric knee joints with extension
stops in 10, 20 and 40 degrees.
The joints are available in Stainless Steel and Titanium, you can chose from
5 different versions (ACL, PCL, Geriatric, Valgus, Varus)
These joints are very durable and have been used in the ipos K-Com knee
orthosis very sucessfully for the treatment of hyperextension in Germany and
Europe.
If you are interested in the brace itself, it is a custom-made product and
can be ordered from ipos Germany directly at 4131-81031 (ask for Mr.
Lohmann)
ipos North America would be able to supply you with information on the
joints only, if you are interested in manufacturing your own brace.
You can reach us at <Email Address Redacted>
--------------------------------------------------
Shane,
Townsend Design makes a custom polio knee orthosis with a posterior tibial
section and anterior thigh section. The posterior laminated shell provides
a large area for distribution of forces generated by hyperextension. It
also has adjustable knee joints, so you can dial in the amount of control
you need. The plastic stops on these joints will wear as expected, but this
protects the titanium joints from wear. The plastic parts are easily
replaced. Any OTS brace with just straps posteriorly allow a significant
amount of hyperextension, even with 10-20 degree extension stops. You can
call Townsend at (800) 432-3466 or (661) 837-1795 to find out if there is a
representative in New Zealand.
Good luck,
--------------------------------------------------
We often use a hinged Swedish knee cage.
-------------------------------------------------
Townsend Rebel 99 Pro is a great OTS orthosis. Works for the majority.
With severe HE we usually require the KAFO.
Look forward to your posting.
--------------------------------------------------
Hello Shane, Jane Marlor here...When a patient has what I call Violent
hyperextension...there may be many causes...first of all check Dorsiflexion
ROM with the hip at 90 and the knee extended if you can bearly get to 90 or
it takes alot of effort ...then there is a dorsiflexion problem...at least 5
degrees is needed for functional ambulation and to utilize a hinged
AFO...What is the Hip doing? Is it in a retracted position?? Is the Trunk
mm tight? these components all play a key role..also Did the pt hyperextend
premorbidly? or hyperextend on the sound side...then you are in for a losing
battle loose hamstrings premorbidly will increase with injury. all the PT in
the world won't help if the pt has slipped into bad habits usually at the
hip..when the hip retracts, the knees hyperextend and the foot
plantarflexes. A sports ko with a solid posterior calf band will help an AFO
set in DF will also help a hybred laminated with double action ankle jts for
fine tuning, and then a you may need to add a 1/4 heel lift to the inside of
the shoe I has also used posterior offset knee joints on a custom KO and put
a hyperextension check strap right at the popliteal section attach the
strap right through the knee joint screws to hold it in place...any way you
build it Good Luck...If I can help with anything else just let me know.
----------------------------------------------------------------
Townsend polio brace, FRAFO, KAFO
Thanks so much for your responses.
Sorry for the delay in posting them but I had some trouble compiling and
sending them.
The replies are seperated by a dotted line.
My original post is at the end of part 2.
Regards
Shane Jansen
---------------------------------------------
Isn't it so that part of the problems with HE is related to spasticity
of the calf muscles (cfr. control is possible when they walk slow)? If
you have an equinus of the foot which can be corrected passively,
but quick stretch reveals a stretch response of the calf, a tuned
AFO could help.
--------------------------------------------
I use a verity of KO and KAFO designs that are made from very rigid composite
shells. I integrate industry standard joints into the orthosis. For
hyperextension, I recommend a single axis/stainless joint head that is sized
appropriate for the application.
----------------------------------------------
Shane:
ipos offers very thin light-weight polycentric knee joints with extension
stops in 10, 20 and 40 degrees.
The joints are available in Stainless Steel and Titanium, you can chose from
5 different versions (ACL, PCL, Geriatric, Valgus, Varus)
These joints are very durable and have been used in the ipos K-Com knee
orthosis very sucessfully for the treatment of hyperextension in Germany and
Europe.
If you are interested in the brace itself, it is a custom-made product and
can be ordered from ipos Germany directly at 4131-81031 (ask for Mr.
Lohmann)
ipos North America would be able to supply you with information on the
joints only, if you are interested in manufacturing your own brace.
You can reach us at <Email Address Redacted>
--------------------------------------------------
Shane,
Townsend Design makes a custom polio knee orthosis with a posterior tibial
section and anterior thigh section. The posterior laminated shell provides
a large area for distribution of forces generated by hyperextension. It
also has adjustable knee joints, so you can dial in the amount of control
you need. The plastic stops on these joints will wear as expected, but this
protects the titanium joints from wear. The plastic parts are easily
replaced. Any OTS brace with just straps posteriorly allow a significant
amount of hyperextension, even with 10-20 degree extension stops. You can
call Townsend at (800) 432-3466 or (661) 837-1795 to find out if there is a
representative in New Zealand.
Good luck,
--------------------------------------------------
We often use a hinged Swedish knee cage.
-------------------------------------------------
Townsend Rebel 99 Pro is a great OTS orthosis. Works for the majority.
With severe HE we usually require the KAFO.
Look forward to your posting.
--------------------------------------------------
Hello Shane, Jane Marlor here...When a patient has what I call Violent
hyperextension...there may be many causes...first of all check Dorsiflexion
ROM with the hip at 90 and the knee extended if you can bearly get to 90 or
it takes alot of effort ...then there is a dorsiflexion problem...at least 5
degrees is needed for functional ambulation and to utilize a hinged
AFO...What is the Hip doing? Is it in a retracted position?? Is the Trunk
mm tight? these components all play a key role..also Did the pt hyperextend
premorbidly? or hyperextend on the sound side...then you are in for a losing
battle loose hamstrings premorbidly will increase with injury. all the PT in
the world won't help if the pt has slipped into bad habits usually at the
hip..when the hip retracts, the knees hyperextend and the foot
plantarflexes. A sports ko with a solid posterior calf band will help an AFO
set in DF will also help a hybred laminated with double action ankle jts for
fine tuning, and then a you may need to add a 1/4 heel lift to the inside of
the shoe I has also used posterior offset knee joints on a custom KO and put
a hyperextension check strap right at the popliteal section attach the
strap right through the knee joint screws to hold it in place...any way you
build it Good Luck...If I can help with anything else just let me know.
----------------------------------------------------------------
Townsend polio brace, FRAFO, KAFO
Citation
Shane Jansen, “Knee hyperext.replies Part 1,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 8, 2024, https://library.drfop.org/items/show/216924.
