Pulmonary and circulatory adjustments determining the limits of depths in breathhold diving.

  title={Pulmonary and circulatory adjustments determining the limits of depths in breathhold diving.},
  author={Karl E. Schaefer and R Donald Allison and Jeffrey Dougherty and Charles Carey and Russel Walker and F J Yost and D. Parker},
  volume={162 3857},
Data on pulmonary gas exchange were collected in breathhold dives to 90 feet in a tank and in open-sea breathhold dives to depths of 217.5 and 225 feet. Thoracic blood volume displacements were measured at depths of 25, 50, 90, and 130 feet, by use of the impedance plethysmograph. The open-sea dives were carried out with an average speed of descent of 3.95 feet per second and an average rate of ascent of 3.50 feet per second. End-dive alveolar oxygen tensions did not fall below 36 millimeters… CONTINUE READING
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