The purpose of this study was to assess the contribution of SCUBA to the pulmonary effects of diving to 4.5 meters depth in healthy subjects using a randomized crossover control condition. Ten healthy divers performed two 60-minute 'dives' using SCUBA in a swimming pool. The non-immersed 1 ATA SCUBA control exposure took place at ambient pressure in the laboratory. Thirty minutes prior to, and 30 and 90 minutes post-exposure, FVC (forced vital capacity), FEV1.0 (forced expired volume), peak expiratory flow rate (PEFR), diffusing capacity (DL(co)), heart rate (HR) and temperature were measured. No significant differences were noted in HR, temperature or spirometry between the two conditions. A significant reduction in diffusing capacity occurred at 30 and 90 minutes after the pool dive (9.3% and 15.1%, respectively, p < 0.05). There was no concordant change in DL(co) following the non-immersed 1 ATA SCUBA control. Thus, a pool dive to 4.5 meters for 60 minutes causes a decrease in DL(co), without a change in spirometry, while breathing from SCUBA equipment without immersion causes no significant change in lung function.

译文

这项研究的目的是使用随机交叉对照条件评估SCUBA对健康受试者潜水对4.5米深度的肺部影响的贡献。十名健康的潜水员在游泳池中使用水肺进行了两个60分钟的 “潜水”。非浸没的1 ATA水肺对照暴露是在实验室环境压力下进行的。暴露前30分钟,暴露后30分钟和90分钟,FVC (强制肺活量),FEV1.0 (强制呼气容积),呼气峰流速 (PEFR),扩散能力 (DL(co)),心率 (HR) 和温度被测量。两种条件之间的HR,温度或肺活量没有显着差异。泳池潜水后30分钟和90分钟,扩散能力显着降低 (分别为9.3% 和15.1%,p <0.05)。非浸入1 ATA水肺控制后,DL(co) 没有一致的变化。因此,池潜水至4.5米60分钟引起DL(co) 的降低,而肺活量测定法没有变化,而从没有浸没的水肺设备呼吸不会引起肺功能的显著变化。

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