ALVEOLAR AND ARTERIAL OXYGEN CONTENTS DURING OROPHARYNGEAL OXYGEN THERAPY *†

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Abstract
The work to be reported has been done to provide additional check on the efficiency of the oropharyngeal method of O2 therapy. The O2 content of the alveoli in 21 human beings and the O2 content of arterial blood in 9 of these subjects were detd. The data obtained from these procedures indicate that with a flow rate of 3 1. of O2/min., the vol. % of O2 in the alveolar air rose from 14.14-28.39. With 7 1. of O2/min., a rise from 14.78-40.62 vol. % was obtained; and with 10 1. of O2 flow/min., an increase from 14.67-50.11 vol. % was present. In 9 of 21 eases, arterial O2 detns. were made. Delivery of 10 1. of O2/min. appears necessary to reach an O2 saturation of 100% in the arterial blood.

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