Need For Specific 10 Gram Semmes-Weinstein /Frey Mono-filaments For Diabetic Peripheral Neuropathy Testing Unnecessary

Not wanting to waste money buying expensive monofilaments, I bought a scale and fishline – and now since I have come across a certain article, I realize any 1 cm medium to thick plastic monofilament fishline will do.

Well I started testing monofilaments, I found you had to get to 1 cm length to start getting over 1 gram pressure and a fairly thick monofilament to get over 10 grams. However, almost any moderate thickness monofilament fishlline will give you over 1 gram. Now I find I have re-invented the wheel as others have already found that out and found that 1 Gram monofilament is actually a better tester that the standard 10 gram anyway. So long as you get a line somewhere between 1-10 grams – it’s fine.

Diabetic peripheral neuropathy: how reliable is a homemade 1-g monofilament for  screening? A case-control study of sensitivity, specificity, and comparison with  standardized sensory modalities
Journal of Family Practice, June, 2006 55(5) 505-508
by Matthew E. Bourcier, Jagdeesh Ullal, Henri K. Parson, Charlotte B. Dublin, Crystal A.G. Witherspoon, Sheila A. Ward, Aaron I. Vinik

or here:

They found in DM peripheral neuropathy,

1 gm had a  sensitivity of  52.4% (not feeling it could pick out about half of cases)  and specificity of  96.3% (if you couldn’t feel it, it meant most likely there was a problem)
10 gram had a sensitivity of 42.8% (less!) and specificity of 99.2%

What this means is that there is very little difference between 1 -10 Gram monofilaments for testing. Any moderate or more fishline will give you over 1 Gram so pick a moderately thick fishline, cut a 2 cm length, tape over first cm, and use the end for testing. Make as many as you will want easily – give them to diabetics to test themselves, and don’t waste your money on bought monofilaments.

Any comments? michael kors outlet michael kors outlet

This entry was posted in Mechanical aids, neuropathic. Bookmark the permalink.

2 Responses to Need For Specific 10 Gram Semmes-Weinstein /Frey Mono-filaments For Diabetic Peripheral Neuropathy Testing Unnecessary

  1. Tony Nicholl says:

    if any moderate fish line would do; why do you think Bourcier and chums insist that you should
    “Be sure to measure and confirm the buckling force of homemade filaments”? (fast track) ?

  2. Marcelo Victor Pires de Sousa says:

    I am a physicist working on light neuron interaction to decrease pain. In order to conduct my research on low level lase light therapy to decrease pain I developed the von Frey filaments which I showed in the paper (

    My comment about the use of fishing line is: there are other types of filaments that can produce better results (more precision and accuracy) but as you told many times it is not necessary and the low-cost and easy availability many times is more important.
    Higher force can be achieved using fibers wires like: optical fibers or glass fiber, they are flexible but bend in a higher force.

Leave a Reply

Your email address will not be published.