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- W2023797425 abstract "The cardiac output was determined by the thermal dilution technique in dogs and calves, and the results were compared with the simultaneously determined electromagnetic flowmeter measurements of aortic flow. For these measurements the indicator, saline solution at room temperature, was injected into the superior vena cava, and the sensing thermistor catheter was placed in the main pulmonary artery. A simple analog computer solved a modified Stewart-Hamilton equation and displayed the calculated cardiac output on a digital readout meter. One hundred twenty simultaneous measurements were made in dogs and 76 determinations in calves. The standard error of estimate, when compared to electromagnetic flowmeter determinations, was approximately 10 percent of mean cardiac output (450 ml/min in dogs and 750 ml/min in calves). Since the measurement of aortic flow by the electromagnetic flowmeter does not include coronary flow, this discrepancy is to be expected. The reproducibility of the method was assessed by evaluating successive pairs of thermal curves recorded within 1 minute. The standard deviation of the difference between successive determinations was approximately 3.5 percent. Initial trials in 8 patients undergoing cardiac catheterization and in 14 patients in the operating room and intensive care unit have shown the method to be highly useful and practical." @default.
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- W2023797425 date "1971-07-01" @default.
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- W2023797425 title "Measurement of cardiac output by thermal dilution" @default.
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- W2023797425 doi "https://doi.org/10.1016/0002-9149(71)90034-8" @default.
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