Vibration white finger

The vibration-induced vasospastic syndrome ( VVS) is a secondary form of Raynaud's syndrome. Other names are traumatic Raynaud's phenomenon, Traumatic Vasospastic Disease (TDV ) or Induced Vibration White Finger ( VWM ) and vibration syndrome. The disease is recognized under the name BK 2104 as an occupational disease.

Pathogenesis

The many years of working with vibrating equipment can at cold contact lead to temporary interruption of blood flow and associated whitening of the fingers. The most commonly affected are chainsaw operators, Cast plasterers and stonemasons. Before the introduction of vibration dampers and grip heaters with chain saws, this was a common disease of foresters. Cause particular vibrations with frequencies in the range of about 20 to 1000 Hz

Diagnosis

The diagnosis of the disease in symptom-free interval is difficult. It is important to medical history (anamnesis), particularly on working conditions. A provocation test (cold water test at 12 ° C) can cause the discomfort. A objectification is done by measuring the skin temperature, determine the reheating time, try pressing the fingernails and neurological examinations to test the sensitivity, vibration sense, and motor functions.

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