Cardiovascular and Respiratory Changes in Man During Oxygen Breathing

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Abstract
Summary.: The effect upon respiration, pulse frequency and blood pressure in man during the inhalation of 100 % oxygen at atmospheric pressure has been studied.Expiration volume. In all cases an increase, averaging 15.4 %.Respiration frequency. In all cases an inconsiderable increase.Vital capacity. In most cases a decrease, averaging 3.03 %.Pulse frequency. In all cases an almost immediate decrease, averaging 9.1 %.Blood pressure. In most cases a decrease in pulse pressure. The diastolic blood pressure showed a statistically significant increase of, on an average, 5.7 %. The systolic pressure was almost constant.No toxic symptoms were observed during these experiments.

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