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
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.