The selection of two different study groups limits a true comparison of pulmonary function test values between the two dive exposures (open ocean or air chamber dive), and the difference in body positioning during hyperbaric exposures (prone in the SCUBA group vs. seated upright in the chamber group), which could have potentially altered patterns of blood flow and VGE clearance within the lung.
Obstructive changes in lung function have been reported with cumulative scuba diving exposure.
Tetzlaff observed a reduction in FVC only after a cold-dive exposure to 50 m, but not following an ambient water temperature exposure to 50 m, and not following cold water exposure to 10 m (Tetzlaff et al. 2001).
In previous experiments (Hyldegaard and Madsen 1989, 1994; Hyldegaard et al. 1991, 2001), the inert breathing gas switch from N2 to helium, or the recompression were done with a certain time delay after the hyperbaric air diving exposure.
The other parameters studied such as the water temperature, dive profile, hyperoxic exposure, or anthropometric data were not associated with the increase in extravascular lung water after the dive.
It may be common knowledge that sleep is important, but for me, and for those willing to dive into it, exposure to current sleep science might shift our views on sleep, and our bedtime.
We modelled RI as a function of RL, source-whale range (2011 only, since 2010 had only one exposure dive), and time since sonar exposure (figures 1 and 2).
This two-part study was designed to assess changes in VA/ Q mismatch following a single ocean SCUBA dive or dry hyperbaric exposure.
The study is the first to establish estimates of how much water divers swallow, figures that can be used in calculating health risks involved with waterborne pathogen exposure during diving.
The other environmental stressors investigated such as the temperature of the water, the dive profile, and the hyperoxic exposure were not significantly related to the increase in ULC number assessed by chest ultrasonography.
Obviously, the duration of a dive is relevant for the exposure assessment; however, we did not take this into account because it was too difficult for a diver to estimate the volume of swallowed water per time unit.
