Skogstad M, Thorsen E, Haldorsen T, Melbostad E, Tynes T, Westrum B
National Institute of Occupational Health, Oslo, Norway.
Undersea Hyperb Med. 1996 Jun;23(2):71-5.
We have studied pulmonary function before and 2 h after open sea dives to 10 and 50 m and 24 h after the dive to 10 m. Nine trainee divers participated in the dive to 10 m and 17 in the dive to 50 m. Mean time in water was 53 (32-62) min for the 10-m dive and 38 (26-76) min for the 50-m dive. Assessment of lung function included dynamic lung volumes and flows and transfer factor for carbon monoxide (TlCO). There were significant reductions (P < 0.05) in forced vital capacity of 5.8% (SD = 3.9) and 1.8% (SD = 2.8), in forced expired volume in 1 s of 6.6% (SD = 3.5) and 2.7% (SD = 2.4), in forced mid-expiratory flow rate of 10.3% (SD = 7.8) and 5.2% (SD = 6.5), and in TlCO of 11.3% (SD = 7.9) and 12.8% (SD = 5.9) 2 h after the 10- and 50-m dive, respectively. Our results indicate that factors related to submersion and increased breathing resistance contribute to changes in pulmonary function in the first hours after open-sea bounce dives.
我们研究了在开放海域潜水至10米和50米之前、之后2小时以及潜水至10米之后24小时的肺功能情况。9名实习潜水员参与了10米深度的潜水，17名参与了50米深度的潜水。10米深度潜水的平均水中停留时间为53（32 - 62）分钟，50米深度潜水为38（26 - 76）分钟。肺功能评估包括动态肺容量和流量以及一氧化碳转运因子（TlCO）。在10米和50米潜水后2小时，用力肺活量分别显著降低了5.8%（标准差 = 3.9）和1.8%（标准差 = 2.8），第1秒用力呼气量分别显著降低了6.6%（标准差 = 3.5）和2.7%（标准差 = 2.4），用力呼气中期流速分别显著降低了10.3%（标准差 = 7.8）和5.2%（标准差 = 6.5），TlCO分别显著降低了11.3%（标准差 = 7.9）和12.8%（标准差 = 5.9）。我们的结果表明，与潜水和呼吸阻力增加相关的因素导致了开放海域快速潜水后最初几小时内肺功能的变化。
