Hypercapnia during Deep Air and Mixed Gas Diving
NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
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Elevated carbon dioxide CO2 levels in the blood, hypercapnia, can limit work capacity and diver safety. The risk of hypercapnia was determined in six U.S. Navy divers with underwater bicycle ergometery at 190 feet of sea water FSW breathing air, plus 300 and 1,000 FSW breathing helium-oxygen using a helmet oro-nasal maskdemand regulator. Peak-to-peak mouth pressure Delta P and breath-to-breath end-tidal partial pressure of CO2 PETCO2 were measured during sixth min of exercise total work 193 watts.
- Test Facilities, Equipment and Methods