Total Surface Bearing Modifications
Chet X Burdette
Description
Collection
Title:
Total Surface Bearing Modifications
Creator:
Chet X Burdette
Date:
2/23/2001
Text:
The following is more of an observation than a question. I have always
believed that a TSB socket should distribute pressure evenly to the
entire surface of the limb. I usually do a x-percent (percent of the
measured circumfurence) over the entire mold top to bottom. The
percentage I take off depends on several factors including tissue density
and thickness/style of liner.
Anyway, it has always bothered me that OWW suggests you take off an even
.5inch or 13mm of circumference from the entire mold. This in most cases
doesn't result in even pressure distribution since most limbs taper in
size from top to bottom. For example removing that 13mm from a level on
the mold with a circ. of 34cm results in a 3.8% reduction in circ. Now
lets say this patient's limb tapers to a circ. of 29cm further down.
Removing 13mm at this level results in a 4.5% reduction of circumference.
So wouldn't this modification produce a socket that was tighter at the
bottom than the top? Is this their intended result or just a result of
oversimplified instructions?
Chet Burdette CPO
Mountain State Prosthetics LLC
Charleston, WV
________________________________________________________________
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believed that a TSB socket should distribute pressure evenly to the
entire surface of the limb. I usually do a x-percent (percent of the
measured circumfurence) over the entire mold top to bottom. The
percentage I take off depends on several factors including tissue density
and thickness/style of liner.
Anyway, it has always bothered me that OWW suggests you take off an even
.5inch or 13mm of circumference from the entire mold. This in most cases
doesn't result in even pressure distribution since most limbs taper in
size from top to bottom. For example removing that 13mm from a level on
the mold with a circ. of 34cm results in a 3.8% reduction in circ. Now
lets say this patient's limb tapers to a circ. of 29cm further down.
Removing 13mm at this level results in a 4.5% reduction of circumference.
So wouldn't this modification produce a socket that was tighter at the
bottom than the top? Is this their intended result or just a result of
oversimplified instructions?
Chet Burdette CPO
Mountain State Prosthetics LLC
Charleston, WV
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
<URL Redacted>.
Citation
Chet X Burdette, “Total Surface Bearing Modifications,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 2, 2024, https://library.drfop.org/items/show/215993.
