超过例外氧暴露时限的空气巡回潜水实验中若干生理功能的观察

17名潜水员安全地进行了55人次超过美国海军例外氧暴露时限1.5—3倍的空气巡回潜水实验。生理功能观察和肺活量测定结果表明,在水深70m以浅,潜水员均保持了相当好的智力和操作能力,在连续3d 3倍氧暴露时限的巡潜后期,只有3人肺活量下降,且在次日测定时已见恢复,表明上述暴露是安全的。美国海军例外氧暴露时限中对于70m以浅空气暴露的相应规定显得保守。

SOME OBSERVATIONS OF PHYSIOLOGICAL FUNCTION DURING AIR EXCURSIONS

Three experiments were carried out on 17 professional divers involving a total of 122 individual air excursions at depths of 60-70m, while they were saturated in a 36.5m N2-O2 environment. The excursion times of the 55 exposures were 1.5-3 times the exceptional oxygen limits laid down by the US Navy. The results of the physiological observations showed that in the excursions shallower than the depth of 70 msw all the divers kept good intelligence and working ability. The results of FVC tested day by day over three days for the exposure three times the US Navy limits showed that, only in the later stage of the exposure of 70m for 4h the FVC in 3 divers decreased, but it recovered when they returned to the habitat for one night. These result indicates that the air excursions mentioned above are safe, and suggests that the exceptional oxygen limits of the US Navy are conservative for the air exposures shallower than the depth of 70m.