運動中における心拍出量の継続的測定 : electrical impedance plethysmography の測定限界とその応用

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This report is on the evaluation of the limitations of measurement accuracy and the practical application of the cardiac output during work load exerted through the use of treadmill and bicycle ergometer employing the Kubicek's impedance plethysmography. The results are as follows : 1) The following shows the measurement capabilities of cardiac output in terms of speed and quantity of work : a) Treadmill running : 5.0km/hr., grade 8% about 500kgm/min b) Bicycle ergometer exercise : 2kp., 60rpm about 720kgm/min The above shows that the measurement of cardiac output using the work load attaind via the employment of the bicycle ergometer can show higher work intensity records. 2) Some of the direct causes in making cardiac output measurements impossible through this method are : a) Determination of the base line, dz/dt minimum value, ventriculo-ejection time, etc., is impossible due to deformation of the impedance wave caused by the swaying and twisting of the upper torso. b) Accurate Zo cannot be measured because of the difficulty of breath-holding exercise. 3) This method shows that the cardiac output measurements attained through treadmill running, although of lower work intensity than the work load of the bicycle ergometer, indicated that it was an exercise form that required higher increases of cardiac output. 4) The above shows that cardiac output measurements by impedance plethysmography is an effective method of monitoring cardiac functions during exercise if it is within the scope of measuring capacity. It is fully applicable in the training of cardiac functions to withstand exercise, and in rehabilitation exercises of cardiopathic patients.
東海大学の論文

運動中における心拍出量の継続的測定 : electrical impedance plethysmography の測定限界とその応用

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