INVESTIGATION OF VIBRATION EFFECT ON THE BODY
Cihan Aksoy, Halim Issever, H. Hilmi Sabuncu, Ayse Karan
(Istanbul University, Istanbul, Turkey)
The purpose of this study is to assess the negative effects of vibration on the workers body dealing with vibration as early as possible and thus to take precautions about them.
In order to determine whether permanent complaints can be noted in various industrial settings, 50 rock drillers, 64 truck drillers were randomly selected as the study group and 54 office clerks were allocated as controls. The whole group had a total of 168 workers. The study and control groups are age-matched.
All the subjects were interwented to elicit subjective symptoms using 38 item questionnaire designed by the medical committee of vibration disease of the Japanese Association of Industrial Health. The prevalence rate of complaints in rock drill operators and control group is found to be statistically significant (p<0.001). Many types of local complaints (such as pain in fingers, wrist pain, elbow pain, low back pain, hearing difficulty) in the hands and arms were significantly higher in the rock drillers than truck drivers and office clerks (p<0.001).
Our result shows the time dependent correlation between occupation and 1oeomotor pathological conditions. Like all other occupational health studies, the purpose of this study is to promote the functional physical capacity of the workers, to prevent injuries that can be caused by the work environment, to organize a working environment suitable to the physiological, anatomical and psychological features of the worker and to maintain coordination between the work and the worker.
REPEATABILITY OF KINEMATIC DATA IN GAIT ANALYSIS
Hye Sim Chung, Bong-Ok Kim (Chungnam National University Hospital, Taejon, Korea)
To evaluate the intrasubject repeatability of kinematic data in computerized three-dimensional gait analysis and to know whether a significant clinical decision could be made on the basis of a single gait evaluation, repeated gait analysis was done with three-dimensional motion analyzer in 10 healthy young men.
Each subject was evaluated in ten runs in a single session on a test day. Time gait parameters, distance parameters, and angle values of hip, knee, ankle and pelvis on the specific gait event in a gait cycle in the sagittal, coronal and transverse planes were measured. Coefficient of variation was used to evaluate the repeatability.
Intrasubject repeatability was excellent for kinematic data in sagittal plane. In contrast, kinematic data in transverse plane showed relatively poor repeatability.
We concluded that it might be reasonable to base significant clinical decisions on the results of a single gait evaluation and it is necessary to improve algorithm to measure the rotational axis of joint to increase the repeatability of kinematic data in transverse plane.