As previously posted, we were having trouble with noise and air leakage from
an Ohio Willow Wood Alpha lanyard system. After tightening the distal end
circumferentially and placing a piece of Alpha liner material between the
lanyard attachment (to the liner) and the rubber seal inside the socket, the
noise seems to have been resolved. We had already tried a pelite ring in
the same spot, but to no avail. In talking with the manufacturer, it seems
we were not the only ones with this problem! Next time, we may try one of
the other systems mentioned below. Responses are seperated by a blank line.
Jacqueline Schmit, M.S.
Resident in Prosthetics
*****
Hanger P&O
2321 W. Cermak Rd.
Chicago, IL 60608
Phone: (773) 890-5600
Fax: (773) 890-4830
*****
I read the post and wanted to let you know; Fillauer has a liner lanyard
system that works great. It uses a traditional shuttle lock system with pin.
A flexible wire screws into the end of the pin and is then threaded through
the shuttle lock and out a special 30mm tube clamp. The wire has a T-handle
that is then attached to seat the limb in the socket. The T-handle and
lanyard wire can then be removed and stored until needed again for donning.
It is in the Fillauer Catalog on page F-170 or in the online catalog at
Fillauer.com in the shuttle lock section.
The only solution I can offer is the Dacron webbing. I have used this
eliminating the velcro by utilizing a double-ring anchor on the socket. This
has worked well and allows easy adjustment to the strap as needed.
I have successfully attached a parachute cord to a locking pin to make a
combination lanyard-pin locking set-up; it functions like a lanyard but has
the reliability of a locking mechanism. It works well and I have used it
may times. If you wish to try it give me a call and I’ll share with you
come considerations before employing this method; I can even send some
photos to help you picture how it works.
I’ve seen a lanyard system where the hole the lanyard passes through to exit
the outer wall of the socket is sealed by an Otto Bock rubber valve.
Basically the person donned as usual, then “tucked” the string back into the
outer hole, then sealed with the valve. Worked well as there was plenty of
clearance for the string pass through. Hope this helps… Bock part number
is 21Y140 for the valve, then you need a valve seat also, I think this guy
used the tube… part number 21Y77. Good luck!
Adaptive O&P makes a 4SNI system that can set up your system for any type of
lock set up.I think it uses dacron and velcro straps for the lanyard.Have
you tried an O-ring in the alpha lanyard to eliminate swishing?
Is it possible to make an aliplast gasket for the lock to seal it? I’ve had
similar issue’s with patients using the iceross system in the past. I made a
little o ring from aliplast to use as an interface between the housing and
the threaded attachment.
PDI has a new system that uses a small pin with a lanyard threaded through
it. The lanyard is used to pull the patient into the socket and the short
pin has a few clicks to lock it into place. I haven’t used it yet, but I
think it may be an option for you. I look forward to your posted results.
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