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J Appl Physiol 60: 45-51, 1986;
8750-7587/86 $5.00
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Journal of Applied Physiology, Vol 60, Issue 1 45-51, Copyright © 1986 by American Physiological Society

ARTICLES

Gas bubbles in the circulation of divers after ascending excursions from 300 to 250 msw

A. O. Brubakk, R. Peterson, A. Grip, B. Holand, J. Onarheim, K. Segadal, T. D. Kunkle and S. Tonjum

The occurrence of intravascular bubbles in arteries and veins has been studied using pulsed Doppler ultrasound in six subjects who performed two ascending excursions each from 300 to 250 meters of seawater (msw) during a heliox saturation dive. Following decompression, high-intensity reflections could be observed not only in the venous system but also in the arteries, most notably in the carotid artery. Intravascular bubbles were more numerous during the first ascent than during the second. The arterial bubbles most probably come from the venous side of the circulation, indicating that the pulmonary filter is not as effective as previously thought during saturation diving.


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