人の心臓および血管膣内の温度変化について

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書誌事項

タイトル別名
  • A Study on the Changes of the Intravascular and Intracardiac Blood Temperatures in Man
  • 人の心臓および血管腔内の温度変化について
  • ヒト ノ シンゾウ オヨビ ケッカン クウナイ ノ オンド ヘンカ ニ ツイテ

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説明

The purposes of this investigation were as follows: (1) How much of a thermal gradient is there, depending on the site measured, in the heart and the great vessels? (2) What kind of the qualitative or quantitative thermal change is seen in each sites? (3) How much heat production is there in the heart, brain and liver? Materials and Methods: The temperature measurements for this investigation were carried out with a thermistor catheter which had a thermistor mounted at the top. The study was done on eleven adults who had either congenital or acquired heart disease. By connecting the thermistor catheter to one arm of a bridge circuit and balancing it with a variable resistor on the other arm, the signal that came over this circuit was amplified and continuously recorded. On this record Δ10Ω was set to be 0.06°C and the amplitude to be about Δ1.0cm. The temperature was counted out back-ward with the value of the resistance of the calibration curve which was made by the variable resistor. This calibration curve was made by comparing the value of the resistance of a thermistor with the respective water temperature. The water temperature then was changes gradually. The temperature measurements were made in the following nine sites: l) the pulmonary artery wedge position 2) the pulmonary artery 3) the outflow tract in the right ventricle 4) the right atrium 5) the inferior vena cava 6) the right hepatic vein 7) the superior vena cava 8) the left jugular vein 9) the left subclavian vein The thermistor was attached in the nostril in order to see the respiratory cycle. The cases were examined during the normal respiration, the deep breath period and during no respiration. The time constant of the catheter and the recorder were within 0.15 seconds. In this study the mean circuit of one second was used. Furthermore, the calculation was made by the planimetry according to the calibration.

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