Reduction Values Responses Part II
LEOPOLDO FUENTES, CPO
Description
Collection
Title:
Reduction Values Responses Part II
Creator:
LEOPOLDO FUENTES, CPO
Date:
10/26/2011
Text:
Eddy,
Too many variables to answer directly...TSB socket design? hybrid of a ptb
tsb? Type of liner being used? Tissue type? A general value I have
determined over the years is for my socket design a 3mm reduction equals
about a one ply reduction. I would like to know what responses you receive.
Thanks.
______________________________________________________
I don't know any, and I had make me the same question, if you found some
please let me know.
Greetings !
______________________________________________________
Hi Eddie,
What I usually do is taking the plaster positive mould of the patient,
taking measurements at several points without the sock, and then do the same
at the same points with the socks around the mould. Then it's a matter of
comparing the circumferences and reducing accordingly.
_______________________________________________________
3mm circ per ply is the value I was taught.
______________________________________________________
It can't be done as a straight percentage Eddy. The cross-sectional area of
the sock is a fixed value, whereas the cross-sectional area of the limb is a
variable.
If you looked at a cross-section of a limb as a perfect circle, the most
accurate way to reduce the volume would be to reduce the diameter by about
3mm for 3-ply, or 4mm for 5-ply.
For example, if the limb circumference is 220 mm:
220/pi=70
70-6=64
64*pi=201
220/201=1.1, or roughly a 10% reduction.
For a limb circumference of 320 mm:
302/pi=102
102-6=96
96*pi=301
320/301=1.06, or roughly a 6% reduction.
________________________________________________________
Please forward me the the responses from your list serve question. Thanks.
________________________________________________________
There is no formula that I know of and depending on what brand of sock
because they all vary in thickness. My guess is about 3% for a 5ply stretch
sock.
________________________________________________________
No known formula. % changes with the circumference. for example, 5% of 10
is .5 reduction. 5% of 15 is a .75 reduction. 5% of 20 is a 1.0
reduction.
I can tell you the difference of a 3mm liner & 6 mm liner is 8-10 ply,
depending on tissue firmness (density).
Eddy Leopoldo Fuentes, C.P.O.
CLINICAL DIRECTOR
Diabetic Solutions, Corp.
Urb. Flamboyan Calle 3 D9
Manati, PR 00674
Office Phone: 1-787-884-3382
Fax: 1-787-854-2000
Cel. 1-787-317-7525
<mailto:<Email Address Redacted>>
<Email Address Redacted>
CONFIDENTIALITY NOTICE: This e-mail message, including attachments, is for
the sole use of the intended recipient(s) and may contain confidential
and/or protected health information. Under the Federal Law (HIPAA), the
intended recipient is obligated to keep this information secure and
confidential. Any disclosure to third parties without authorization from the
member or as permitted by law is prohibited and punishable under Federal
Law. If you are not the intended recipient, please contact the sender by
reply e-mail and destroy all copies of the original message.
Too many variables to answer directly...TSB socket design? hybrid of a ptb
tsb? Type of liner being used? Tissue type? A general value I have
determined over the years is for my socket design a 3mm reduction equals
about a one ply reduction. I would like to know what responses you receive.
Thanks.
______________________________________________________
I don't know any, and I had make me the same question, if you found some
please let me know.
Greetings !
______________________________________________________
Hi Eddie,
What I usually do is taking the plaster positive mould of the patient,
taking measurements at several points without the sock, and then do the same
at the same points with the socks around the mould. Then it's a matter of
comparing the circumferences and reducing accordingly.
_______________________________________________________
3mm circ per ply is the value I was taught.
______________________________________________________
It can't be done as a straight percentage Eddy. The cross-sectional area of
the sock is a fixed value, whereas the cross-sectional area of the limb is a
variable.
If you looked at a cross-section of a limb as a perfect circle, the most
accurate way to reduce the volume would be to reduce the diameter by about
3mm for 3-ply, or 4mm for 5-ply.
For example, if the limb circumference is 220 mm:
220/pi=70
70-6=64
64*pi=201
220/201=1.1, or roughly a 10% reduction.
For a limb circumference of 320 mm:
302/pi=102
102-6=96
96*pi=301
320/301=1.06, or roughly a 6% reduction.
________________________________________________________
Please forward me the the responses from your list serve question. Thanks.
________________________________________________________
There is no formula that I know of and depending on what brand of sock
because they all vary in thickness. My guess is about 3% for a 5ply stretch
sock.
________________________________________________________
No known formula. % changes with the circumference. for example, 5% of 10
is .5 reduction. 5% of 15 is a .75 reduction. 5% of 20 is a 1.0
reduction.
I can tell you the difference of a 3mm liner & 6 mm liner is 8-10 ply,
depending on tissue firmness (density).
Eddy Leopoldo Fuentes, C.P.O.
CLINICAL DIRECTOR
Diabetic Solutions, Corp.
Urb. Flamboyan Calle 3 D9
Manati, PR 00674
Office Phone: 1-787-884-3382
Fax: 1-787-854-2000
Cel. 1-787-317-7525
<mailto:<Email Address Redacted>>
<Email Address Redacted>
CONFIDENTIALITY NOTICE: This e-mail message, including attachments, is for
the sole use of the intended recipient(s) and may contain confidential
and/or protected health information. Under the Federal Law (HIPAA), the
intended recipient is obligated to keep this information secure and
confidential. Any disclosure to third parties without authorization from the
member or as permitted by law is prohibited and punishable under Federal
Law. If you are not the intended recipient, please contact the sender by
reply e-mail and destroy all copies of the original message.
Citation
LEOPOLDO FUENTES, CPO, “Reduction Values Responses Part II,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 24, 2024, https://library.drfop.org/items/show/233062.