[Diagnosis value of Doppler signal. From the finger pulp (author's transl)]

Receiving of Doppler signal from the pad is able to make complete the diagnosis of vascular acrosyndromes beside clinics, functional processes and above all capillaroscopy at the fingertip, conjunctiva and skin surface. There is not any signal in acrocyanosis, generalized sclerodermia, sharp's disease and chronical arteriopathy. There is a signal in P.A.N., dermatomyositis and L.E.D., likewise in primary form of Raynaud, in acroparestesias, in erythralgias... On the other and, in case of acrocyanosis mixed with Raynaud, the signal vanishes.