Re: Ankle Articulation Vs. Shock Pylon
bradley wheaton
Description
Collection
Title:
Re: Ankle Articulation Vs. Shock Pylon
Creator:
bradley wheaton
Date:
8/25/1999
Text:
Mark, in regard to your topic and other inquiries by other list members I
offer the following: I am 40 years old. In May of 98 I was involved in a
train accident to took my left leg just below the knee. I work for a
railroad in Maine. The injury left me with only 3 inches of bone and muscle
and tissue below that, giving me about 5 inches in all. My stump is 90%
skin grafted. I use a Tech liner with the IceX pin lock, the TT pylon by
Endolite and the Cirus foot. The combination of these components provides
maximum shock absorption to protect the grafted skin, and so far it has
worked very well. I am very active. I walk very comfortably, exercise on a
Stairmaster and a stationary bike. I also play golf among other things.
The TT pylon also features a swiveling action which works well, especially
when golfing. With such a short stump, the liner extends over my knee
restricting some movement but I am very happy with this set-up. I am
fortunate to be at the hands of two excellent prosthetist in Bill Velicky
and Molly Pitcher. I know this doesn't answer all your questions or
concerns, but I how this will be helpful.
Bradley
-----Original Message-----
From: Mark Raabe < <Email Address Redacted> >
To: <Email Address Redacted> < <Email Address Redacted> >
Date: Tuesday, August 24, 1999 5:03 AM
Subject: Ankle Articulation Vs. Shock Pylon
>Dear Colleagues,
>A recent message posted by Mark Benveniste CP, raised the issue of ankle
articulation and the prescription criteria for such componentry.
>This topic is one that could be expanded upon to include a new range of
components, ie. Vertical shock pylon, T/T Pylon etc. collectively I will
refer to them as Pogo Sticks.
>As you may surmise from the description used above, my opinion of the Pogo
Stick range is one of scepticism. I would dearly like to encourage a list
discussion about this subject to gauge experience and opinions other than my
own, (my own being limited).
>There is no doubt that in nearly all cases of a Pogo Stick upgrade the
response is a positive one, with comfort being the big C word. It
worries me however that we have provided a vertical compression that can
only be returned in one way - vertically. I know that during my studies in
P&O, that an important Biomechanics principle was to minimise the vertical
displacement of the centre of mass during gait. A vertical displacement
followed by subsequent vertical replacement that is provided by the Pogo
Sticks is surely forming a tangent away from these principles.
>The more normalised gait pattern incorporating an articulated ankle
provides not only compression qualities but at the same time dissipates
these via a further progression into the gait cycle, (plantarflexion). This
is achievable now-a-days with a range of feet, from the simple single axis
with bumper design to energy storage systems present at the heel component.
>It would be interesting to hear from anyone with research into this area,
ie. Centre of mass differentials with and without Pogo Sticks; Energy
expenditure comparisons; Long term effects of vertical displacement on the
spine?
>I look forward to reading your responses on this topic, it is I believe the
main reason for this list - Information exchange leading to professional
development of the Prosthetist/Orthotist
>
>I eagerly await,
>Mark Raabe
>Division Manager
>Technical Orthopaedics
>Otto Bock (A/Asia)
>Ph. +61 2 9319 6852
>Fax. +61 2 9699 1459
>Mob. 0414 682 301
> <Email Address Redacted>
>
>
offer the following: I am 40 years old. In May of 98 I was involved in a
train accident to took my left leg just below the knee. I work for a
railroad in Maine. The injury left me with only 3 inches of bone and muscle
and tissue below that, giving me about 5 inches in all. My stump is 90%
skin grafted. I use a Tech liner with the IceX pin lock, the TT pylon by
Endolite and the Cirus foot. The combination of these components provides
maximum shock absorption to protect the grafted skin, and so far it has
worked very well. I am very active. I walk very comfortably, exercise on a
Stairmaster and a stationary bike. I also play golf among other things.
The TT pylon also features a swiveling action which works well, especially
when golfing. With such a short stump, the liner extends over my knee
restricting some movement but I am very happy with this set-up. I am
fortunate to be at the hands of two excellent prosthetist in Bill Velicky
and Molly Pitcher. I know this doesn't answer all your questions or
concerns, but I how this will be helpful.
Bradley
-----Original Message-----
From: Mark Raabe < <Email Address Redacted> >
To: <Email Address Redacted> < <Email Address Redacted> >
Date: Tuesday, August 24, 1999 5:03 AM
Subject: Ankle Articulation Vs. Shock Pylon
>Dear Colleagues,
>A recent message posted by Mark Benveniste CP, raised the issue of ankle
articulation and the prescription criteria for such componentry.
>This topic is one that could be expanded upon to include a new range of
components, ie. Vertical shock pylon, T/T Pylon etc. collectively I will
refer to them as Pogo Sticks.
>As you may surmise from the description used above, my opinion of the Pogo
Stick range is one of scepticism. I would dearly like to encourage a list
discussion about this subject to gauge experience and opinions other than my
own, (my own being limited).
>There is no doubt that in nearly all cases of a Pogo Stick upgrade the
response is a positive one, with comfort being the big C word. It
worries me however that we have provided a vertical compression that can
only be returned in one way - vertically. I know that during my studies in
P&O, that an important Biomechanics principle was to minimise the vertical
displacement of the centre of mass during gait. A vertical displacement
followed by subsequent vertical replacement that is provided by the Pogo
Sticks is surely forming a tangent away from these principles.
>The more normalised gait pattern incorporating an articulated ankle
provides not only compression qualities but at the same time dissipates
these via a further progression into the gait cycle, (plantarflexion). This
is achievable now-a-days with a range of feet, from the simple single axis
with bumper design to energy storage systems present at the heel component.
>It would be interesting to hear from anyone with research into this area,
ie. Centre of mass differentials with and without Pogo Sticks; Energy
expenditure comparisons; Long term effects of vertical displacement on the
spine?
>I look forward to reading your responses on this topic, it is I believe the
main reason for this list - Information exchange leading to professional
development of the Prosthetist/Orthotist
>
>I eagerly await,
>Mark Raabe
>Division Manager
>Technical Orthopaedics
>Otto Bock (A/Asia)
>Ph. +61 2 9319 6852
>Fax. +61 2 9699 1459
>Mob. 0414 682 301
> <Email Address Redacted>
>
>
Citation
bradley wheaton, “Re: Ankle Articulation Vs. Shock Pylon,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 2, 2024, https://library.drfop.org/items/show/212391.
