減圧症発症予防のためのアプローチ : 気泡計測法による減圧表(ブラックプール表)の評価

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The Blackpool table was used in Hong Kong subway construction work where we did medical consultation on how to prevent decompression sickness. Between 1975 and 1984 there were 260 bends patients out of 28, 554 workers who were exposed to pressures of between 1.2 and 2.8kg/cm2, and the incidence of decompression sickness (bends) was 0.91%. This percentage of bends is considered quite acceptable.The Blackpool table has been recognized as one of the safest decompression schedules experimentally but it became clear that its schedule for the prevention of decompression sickness could be improved upon through observation and evaluation by a bubble counting technique using an agarose gel model.The Model One table, which was developed by us, was applied to the Blackpool table to decrease the incidence of bends. These two decompression schedules were checked by a bubble counting technique. The special feature of the Model One table is that it utilizes the initial decompression ratio between the bottom pressure and the first stop of decompression; i. e., the slow decompression ratio of 0.1kg/cm2/min, in contrast with the Blackpool table.The extension of the total decompression time is less in Model One than in the Blackpool schedule, however, the number of bubbles formed in the agarose gel model decreased significantly and the incidence of bends was also decreased by nearly one half.This demonstrates that the initial decompression ratio is another key for decreasing the incidence of bends.
日本衛生学会の論文

著者

眞野喜洋
東京医科歯科大学

減圧症発症予防のためのアプローチ : 気泡計測法による減圧表(ブラックプール表)の評価

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