one-way valves in TT sockets Responses (part four)

one-way valves in TT sockets Responses (part four)

Randall McFarland, CPO

Thanks again to all who took the time to respond!

Yes, I do use one way valves. All my sockets are suction including
preliminary/diagnostic types. Any advantage to eliminate pistoning of course
is to be used as much as possible, suction being one type. In addition the
hug of everything under the prosthetic shell is beneficial to a better
vascular environment helping reverse fluid from the distal extremity toward
cephalad.
Rick Feldman, CPO

    The Radis Uni-Directional air valve allows fresh air to be introduced
into the cuff of a supracondylar trans tibial prosthesis during the swing
phase and this creates an air cushion during the stance phase. The effect of
forcing air circulation from the distal to the proximal end can have
beneficial results to the skin condition of the residual limb. This can be
achieved simply and efficiently by fitting one Uni Directional Air Valve on
the bottom of the liner.
   During the swing phase, the UDAV will open and fresh air will be sucked
into the space on in the bottom of the residual limb. At the commencement of
the stance phase the UDAV closes and the air is compressed by the residual
limb, creating a cushioning effect which reduces the impact on the residual
limb.
    Throughout the stance phase this air travels slowly upwards providing a
cooling and drying effect on the limb. This is repeated with every step. The
compressed air provides a pressure cushion around the stump and the liner,
making the walking less painful and more comfortable.
     In Western Australia and Victoria the valves are regularly used. The
subjective comments received from many individuals have been very positive
and most encouraging.
    Some of the comments after using the valve for approximately four months
are:
    Brad Ness age 21: Stump was subject to bruising but even pressure stops
that. Stump is now dry, very little sweating and no odour. Can keep leg on
for longer and leg stays in constant shape. Minute swelling.
    Ron Simpson age 61 (Double amputee): No mow sores skin tenderness and
sweating. Walking more relaxed, air cushion in stump makes walking very
comfortable and easy Have not had to take legs off during day or evening.
Walking percentage 60% to 70% more.
     Mrs. Mabel Gray Age 84: Has helped has blisters from pressure. an
leave prosthesis on linger when walking.
     James William Cross Age 44: Skin is now dry, using fewer socks. Able
to wear prosthesis for linger periods of time.
     Robert Thomas McIntyre Age 85: Definitely cushioning effect. Having
to use a walking stick owing to previous injuries, I find my posture is
beginning to be more upright.
    The prosthetic clinics fitting these valves do not have an email address
so if you wish to ask any more questions do not hesitate to <Email Address Redacted>
(Julie Radis)
         Hope this information is useful to you and don't forget I am
speaking from experience myself as I have been wearing the UDAV for over five
years now and have had none of the previous serious problems I had in the
past.
 Vic Radis