bk socket design for running

bk socket design for running

Barry Press

2/19/2013

Thank you for all your replies.
 
 
Have u tried the RCR method from coyote design?

W. Brent Wright CP BOC/O


Please check the swissleg video on youtube and lets talk after


Here is the link
<URL Redacted>



and you can view other videos on the chanell

Best Regards


Mohamamd Ismail 
CTO Swissleg


Look into a braided Spyder socket. Very light weight and extremely strong.  Used by Paralympic athletes.  Friddles and O&P1 in USA manufacture these



I am a BK amputee, 48 years old now ( a young 48, very active, skiing, running, biking, etc.).  For my every-day leg, I use an Iceros Comfort Cushion Liner, 6 mm uniform, with a simple expulsion valve in the socket. The foot that I am wearing today is a College Park Soleus foot.  This is the first foot I have worn in the past 15 years of being an amputee that I have really liked, better than my Flex Foot Modular III.  For 12 years about ALL I would wear was my Flex Foot Mod III.  I have tried about EVERY foot out there, all of the Ossur feet, College Park, Otto Bock, Springlite, Willow Wood, etc.    But as of now, my favorite and most comfortable foot, is this new Soleus.  I like it so much, I just ordered a 2nd one to have around, and to wear.  When I travel I take spare parts, a spare leg, etc.  We are heading to Disney World in 2 weeks,  (we go there as a family about 2-3 times per year, which is a full week of walking, and having a great
 time...but a LOT of walking).  I have a few different sockets, all with Disney fabric laminated into them.  So I want my 2 favorite Disney sockets to have a good foot on them, so now the 2 best sockets will have Soleus feet on them.

For my running leg, I use the same socket as my every day socket.  I have just a plain black carbon socket, but from the exact same check socket (I have my check socket stored in my own filing cabinet, which is what I have used to make probably 20 new sockets in the past 10 years).  I still use the same Iceros Comfort 6mm cushion liner, NO pin system.  I have tried to run with a pin system, and it was painful.  I have the Flex Foot running foot, with the Nike sole on it.  I have another running foot from Flex Foot (the one before the Nike sole), and I have a sole from Vibram which is glued onto the bottom of the foot module.  That foot is the same as my newer one, but just without the Nike part.

For my mountain biking leg, I have a pin locking system for that, which gives me more knee flexion, and don't need to wear the knee sleeve for suction that way.  It is the Ossur 6 mm comfort Locking liner.

I have tried some of the thinner liners, and I really feel that I need the extra gel for more comfort.  Some gel liners are better than others, some hold up better than others.  But in my 14 years of experience (personal and professional), these Iceros liners do perform well, fit well, and last longer than any other liners I have tried on my patients and also myself.

So for running, I really recommend to use a 6mm gel liner, cushion liner, with a suction suspension.  But after running for a few minutes, my leg will shrink.  I normally use a 5 ply sock every day.  But after running for a few minutes, I am up to an 8 ply sock.....then by the end of a 5K run, I am in 10 ply of socks.  It is a pain to have to change during any kind of a race or event.....I ONLY run one time a year in a 5K planned fund raising event. So I make sure I am up extra early, and have time to get on the tread mill, and get the fluid moving in my leg, and then can usually start the race with an 8 ply, and have been able to finish the race with that same 8 ply.  One year, I started with the 5, and then had to add on a 3 ply, which I was carrying with me, just prepared to add it when I felt the movement in the socket, or felt like it was loose.

I hope this helps.

Jim DeWees,


A carefully-shaped socket (not simply total contact), with a pelite liner.   Pediatric clinics (very active patients) tend to see this type of patient.  Total contact/silicone liner is good for geriatric.




This is a good combination:
TSB socket (Modular Socket System MSS), silicone liner (Dermo 3mm), vacuum suspension with sleeve and valve, and FlexRun foot.
Regards
Anton

Anton Johannesson
CEO, PhD, CPO
ORTOPEDTEKNIK AB
Centralsjukhuset
291 85 Kristianstad
Sweden




I have a very active, young amputee population where I design several running legs a year…what is the current socket design?  TSB won't work well.  




Christopher Jones, CPO 
Rebound Prosthetics, Inc. 




When workng with amputees who wish to run it is important to understand the need for pressure distribution and
support in the socket. The most successful running sockets are very intimately fit and have almost no pistoning and usually use auxillary suspension. Total  surface bearing designs work well but protection of the sensitive distal end must be incorporated. The trimlines must allow full flexion of the knee so with shorter residuums you need auxillay support.
 
Carey Glass CPO FAAOP



Liner(preferably urethane) and suspension sleeve, without pin.
A silicone liner and pin suspension will not cushion the stump, in the way that urethane liner and TSB socket (plus suspension sleeve and expulsion valve) will.
Liz Rainey





He is probably having distal tibia problems and will run into issues with the socket wanting to rotate.  I find you need to have more of a TSB / PTB design where you take into account the A-P and M-L dimensions and tie that into your volume reduction.  Give relief for the distal tibia and any other noted prominences.  Provide him with a suspension sleeve as well for auxiliary suspension because as he starts to sweat there is the possibility of the pin liner to slide off.  That almost happened to a patient of mine who is a BK and an ultra-marathon runner (50+ mile races), his almost came off during a 10K race that was a trail run mostly.  Good luck.   



Christopher Jones, CPO 
Rebound Prosthetics, Inc



I've found that locking liners can occasionally cause a bit too much 'milking' of the distal end of the stump when running, but an auxiliary suspension sleeve can help. It could also be a matter of muscle hypertrophy not present with simple ambulation. If this is the case, a socket made from a cast taken with the muscles slightly contracted should help. There could be other issues at play, but without knowing any of the particulars it's impossible to determine the cause of the discomfort.
I've had my best success with cushion (or Seal-In) Ossur liners and suspension sleeve with a foot that offers shock absorbing characteristics. (Flex-Run, Mod III, or Vari-Flex XC) 
Not much, but I hope this helps.
Cheers,
Scott Hedlund CP(c)
Russell Prosthetics
New Westminster, BC Canada



6 + Marathons. Suction all the way.
6mm liner,  custom with light lube on skin for volume control H/S balancing?

Jack Richmond, CPOA
The Fillauer Companies