脈波の伝達に関する研究-2-

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Using a photoelectric apparatus, pulse waves were obtained from the great toe of the left foot, and were recorded simultaneously with electrocardiogram. The time interval between the peak of the R wave in EKG and that of the pulse wave was divided by the distance between the tip of the xyphoid process and the medial malleolus of the left leg to obtain the transmission time of the pulse wave (RP-index). The relation of the RP-index to the blood flow and blood pressure of lower leg as well as the effect of warming and cooling of lower upon these parameters were studied. The results obtained were as follows: 11. During rest, there was no linear correlation between the RP-index and blood flowof the lower extremity.2. There was an negative correlation (r=-0.67, p<0.01) between the RP-index and the change in local blood pressure due to the positional change of the lower extremity.3. When the foot was warmed, the RP-index and blood flow increased and the local blood pressure decreased.4. When the foot was cooled, the RP-index and blood flow decreased and the local pressure increased.5. When cooling and warming is of an excessive degree, the change of the peripheral circulatory regulation by the autonomic nervous reflex is influenced by the magnitude of the RP-index.
日本民族衛生学会の論文