[Skin blood flow measurement in microangiopathic changes]

The classical Martorell-ulcer, which is--according to the original criteria--rather rare, is preceded and accompanied by characteristic microangiopathic signs, the so-called "Pigmented Praetibial Patches" (PPP's). These signs are of great diagnostic significance. In complicated pathology it is important to measure skin blood flow and especially the reactions on a temporary arterial occlusion and on the application of a vasodilating ointment. For this purpose a method is used, based upon measurement of heat transport in the superficial 1.5 mm of the skin.