By the way, ever wonder, if the WEST-D™ has only five Softip monofilaments, then how does it test at all those levels?" By threshold we mean the 50% detection level at near 0% false positives. Therefore, if the patient reports the application of 10 g half of the time, then 10g is threshold. But if the patient always reports 10 g and never reports 2 g, then the threshold is somewhere between those two values. In that case, we estimate at the average of 10 and 2, i.e., 6 g. The Rapid Threshold Procedure quickly estimates threshold with the WEST-D™.
Eleven-sensation level, five Softip monofilaments, calibrated for applied-force esthesiometerRequest Product Information