COLD WATER IMMERSION TEST ON THE WORKERS WITH VIBRATION SYNDROME:RECOVERY OF THE FINGERTIP SKIN TEMPERATURE DURING AFTER THE END OF IMMERSION
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Fifty three previous chain-saw operators, aged 30 and over, under the juristdiction of M Forestry Bureau were examined for fingertip skin temperature after 60 seconds immersion in cold water (4°C), and later recovery of fingertip skin temperature. The subjects included 14 workers with Raynoud's phenomenon history (R (+) group) and 39 workers without such history (R (-) group) <BR>The main findings were as follows : <BR>1) The R (+) group could not be differentiated from the R (-) group by the recovery curve which was obtaind by plotting the fingertip skin temperature at 1 minute intervals for 10 minutes after the end of immersion.<BR>2) The recovery of the initial fingertip skin temperature tended to differ quantitatively in R (+) and R (-) groups.<BR>In view of this, T<I><SUB>t</SUB></I> was calculated by the following formula : <BR>T<I><SUB>t</SUB></I>= (T<SUB>1</SUB>+T<SUB>2</SUB>+T<SUB>3</SUB>) -3T<SUB>0</SUB><BR>To was the fingertip skin temperature at the end of immersion. T<SUB>1</SUB>, T<SUB>2</SUB> and T<SUB>3</SUB> were the fingertip skin temperatures at 1, 2, and 3 minutes after the end of immersion, respectively.<BR>In this results, T<I><SUB>t</SUB></I>of less than 11 was found in 13 cases of the R (+) group (92.9%) and in 17 cases of the R (-) group (43.6%). The difference between two rates significant (P <0.01). The sensitivity value in the above division was 92.9% and the specificity value was 56.4%.<BR>Thus T<I><SUB>t</SUB></I> was found to be a effective index for the classification into R (+) and R (-).
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北関東医学会 | 論文
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