Читать книгу Musculoskeletal Disorders - Sean Gallagher - Страница 53

Sources of vibration that can cause HAVS are varied and include hand drills, chisels, power chain saws, power jigsaws, sanders, riveters, polishing tools, and many others. There is some indication that high‐frequency vibration is more relevant to the symptoms of HAVS, as such vibration may be absorbed preferentially by the hand and fingers, whereas lower frequency vibration energy may affect the arms and shoulders to a greater extent (Shen & House, 2017). It is a disorder resulting from prolonged exposure to vibration, specifically to the hands and forearms while using vibrating tools. Symptoms include numbness, tingling, and loss of nerve sensitivity. HAVS is a painful and potentially disabling condition of the fingers, hands, and arms due to vibration. There is initially a tingling sensation with numbness in the fingers. The fingers then become white and swollen when cold and then red and painful when warmed up again. Cold or wet weather may aggravate the condition. Picking up objects such as pins or nails becomes difficult as the feeling in the fingers diminishes, and there is loss of strength and grip in the hands. The pain, tingling, and numbness in the arms, wrists, and hands may interfere with sleep.