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Measurement of oxygen consumption in scuba divers working in open water.

Abstract A recent shift in interest among many hyperbaric physiologists and other diving scientists to studies of divers actually working in the ocean has created a need for improved physiological data acquisition systems and research techniques. A review of apparatus and methods for measuring the oxygen consumption of divers breathing 100% oxygen, mixed gas (He/O2, N2/O2), and compressed-air during open water dives, is presented with critical evaluation. A new system for respiratory gas sampling and measurement of oxygen uptake in divers is described. The UGS (Underwater Gas Sampler) is a significant improvement over other systems and it possesses the capability to: (1) take as many as ten separate samples of mixed exhaled gas during a single dive, (2) allow gas sampling at several different metabolic levels at multiple depths during a single dive, (3) store ten aliquot samples separately for an indefinite period of time, (4) create no appreciable interference with respiration, (5) be completely self-con...