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- W2049914155 abstract "Oxygen consumption dedicated to respiratory work (V O(2RESP)) during quiet breathing is small in normal patients. In the morbidly obese, at high minute ventilations, VO(2RESP) is greater than in normal patients, but VO(2RESP) during quiet breathing in these patients is not known. We postulated that such patients have increased VO(2RESP) at rest which may predispose them to respiratory failure when additional respiratory workloads are imposed. We measured baseline VO(2) in morbidly obese patients immediately prior to gastric bypass surgery and again after intubation, mechanical ventilation, and paralysis, and compared their change in VO(2) to nonobese patients scheduled for elective abdominal surgery. Baseline VO(2) was higher in the obese patients compared with control patients (354.6 versus 221.4 ml/min; p = 0.0001) and the change in VO(2) from spontaneous breathing to mechanical ventilation was significant in the obese patients (354.6 versus 297.2 ml/min; p = 0.0002) but not the control patients (221.4 versus 219.8 ml/min; p = 0.86). We conclude that morbidly obese patients dedicate a disproportionately high percentage of total VO(2) to conduct respiratory work, even during quiet breathing. This relative inefficiency suggests a decreased ventilatory reserve and a predisposition to respiratory failure in the setting of even mild pulmonary or systemic insults." @default.
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- W2049914155 date "1999-09-01" @default.
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- W2049914155 title "The Impact of Morbid Obesity on Oxygen Cost of Breathing (V˙<scp>o</scp> <sub>2RESP</sub>) at Rest" @default.
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- W2049914155 doi "https://doi.org/10.1164/ajrccm.160.3.9902058" @default.
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