Background: Vibration is defined as oscillatory motion. Oscillatory movements involves velocity in the opposite direction alternate velocity in one direction and then a velocity in the opposite direction. This change of velocity means that the object is constantly accelerating, first in one direction and then in the opposite direction.The oscillatory motion from a source, e.g., a vehicle or a tool, may be simple harmonic sine wave or a multiple wave complex differing in frequency and acceleration; or a random non-repeating series of complex waves. The human response of vibration depend on the part of the body that is exposed. There are two broad types of vibrations that workers are exposed to i.e vibration transmitted to the whole body (whole-body vibration or WBV) through a supporting surface, for example, the feet of a standing person or the buttocks of a seated person and vibration applied to a part of the body, i.e. segmental vibration. vibration is applied to the hand, it is called as ‘hand-arm vibration’ or HAV.
Objective: To find out the effect of HAVS on hand of car mechanics using vibration machines. To find how many car mechanics are affected with HAVS .
Materials And Methods: Age group:20-40. Only males Work experience of more than 1 years.. Workers using hand arm vibratory tools . Working hours: 8hours per day with 2hrs minimum of vibration exposure.Questionnaire, Jamar., Aesthesiometer were used. Visual analogue scale, Stockholm scale, Quick DASH and Patient Specific Functional Scale. Two point discrimination,. Superficial and deep sensations, Grip strength were assessed.
Result: , out of 217 subjects 142 subjects had no discomfort and were working healthily. on the other side 50 subjects had pain in hand while working, 22 subjects suffered from tingling during work and only 3 subjects showed symptom of numbness during work.. 156 doesn’t have pain on activity and 181 doesn’t have pain on rest. no significant difference is seen in grip strength when compared right and left.. on dash scale 167 subjects had no difficulty , 28 subjects had mild , 3 subjects had moderate and 3 were unable to perform any activity. Conclusion: The study concludes that there is very less prevalence of hand arm vibration syndrome in body shop workers using hand arm vibratory machines in pune area.