Department of Underwater and Hyperbaric Medicine, Istanbul Faculty of Medicine, Istanbul University, Turkey.
Medicina (Kaunas). 2012;48(4):203-10.
The level of dehydration has been known to be a predisposing factor for the development of decompression sickness in divers. The aim of this study was to determine the level of dehydration in divers who dove with heliox and to determine whether the source of this dehydration was intracellular and/or extracellular by means of multifrequency bioelectrical impedance analysis (MF-BIA).
Eleven male professional divers were enrolled in the study. In order to determine the level of dehydration, MF-BIA was carried out (at 5, 50, and 100 kHz) and capillary hematocrit (Hct) was measured two times: one before diving and the other after leaving the pressure room.
When prediving and postdiving parameters were compared, significant increases in the resistance at 5 kHz (P<0.001), 50 kHz, (P<0.001), and 100 kHz (P<0.01) and Hct (P<0.01) were observed after the diving. Similarly, a statistically significant fluid shift was found: total body water, -1.30 L (P<0.001), extracellular water, -0.85 L (P<0.001); and intracellular water, -0.45 L (P=0.011).
Our results showed that mild dehydration occurred both in the intracellular and extracellular compartments in divers after deep diving. This study also indicates that MF-BIA could be a reliable new method for determining the dehydration status in divers.
脱水程度已知是潜水员发生减压病的一个诱发因素。本研究旨在通过多频生物电阻抗分析（MF-BIA）确定使用氦氧潜水的潜水员的脱水程度，并确定这种脱水是细胞内和/或细胞外的。
纳入 11 名男性专业潜水员进行研究。为了确定脱水程度，进行了 MF-BIA（5、50 和 100 kHz）测量，并两次测量毛细血管血细胞比容（Hct）：一次在潜水前，另一次在离开减压室后。
与潜水前相比，潜水后 5 kHz（P<0.001）、50 kHz（P<0.001）和 100 kHz（P<0.01）以及 Hct（P<0.01）的电阻显著增加。同样，发现液体转移有统计学意义：总体水，-1.30 L（P<0.001），细胞外液，-0.85 L（P<0.001）；细胞内液，-0.45 L（P=0.011）。
我们的结果表明，深度潜水后，潜水员的细胞内和细胞外隔室都出现了轻度脱水。这项研究还表明，MF-BIA 可能是一种可靠的新方法，可用于确定潜水员的脱水状态。
