Studying Changes of the Effective Radius in Blood Vessels after Exposure of Low Extremities to Periodical Mechanical Vibrations

Abstract

Background: Previous studies demonstrated a health improving effect in patients underwent an automatic vibratory massage taking 10 minutes. One of reasons that may explain a healing effect of the automatic massage is a stimulated increase in both blood circulation through vascular system and effective size of blood vessels.Objective: This paper aims to quantify a contribution of the automatic mechanical massage of low extremities into the observed reduction in arterial blood pressure and explain this effect.Material and Methods: In this study, the low extremities of male and female patients were exposed to low frequency (12 Hz) mechanical vibrations for 10 minutes and the change in systolic and diastolic arterial blood pressures before and after this procedure was measured.Results: The experiments showed there is a reduction in systolic and diastolic arterial blood pressures after vibrational massage. There were corresponding 3.5±1.8 mmHg and 3.1±1.6 mm Hg arterial blood pressure reductions among men and 5.5±3.2 mm Hg and 2.2±1.2 mm Hg reductions among women.Conclusion: We explained this effect by increasing effective radius of blood vessels. Based on the Hagen-Poiseuille equation, we made estimates for the relative change in the effective radius of blood vessels. They gave the 0.7% and 1.3% increases in the effective radius of blood vessels in low extremities in men during systole and diastole, respectively, and the corresponding 1.1% and 0.6% increases in the effective radius of blood vessels of low extremities in women during the same periods.

The Estimate of Relative Increase in Stroke Volume of a Heart under Influence of Low Frequency Mechanical Vibrations

“…We also assume that this frequency vibratory motion does not affect the size of blood vessels. This assumption is based on the results of our previous work and we observed the increase of the size of blood vessels under influence of the same automatic vibrational massage [ 7 ]. If the same happened in these experiments, it would have led to the decrease in blood pressure which we did not observe.…”

“…Based on the obtained results on the increase of arterial blood pressure in patients whose low extremities were exposed to the low frequency (12 Hz) mechanical vibrations for 10 min, the authors made conclusions about the increase of the effective radius of the blood vessels in low extremities [ 7 ].…”

Knowledge and Experience of the Banjar Community in Overcoming Fevers Based on Culture and Health

“…This is because, according to the public's perception in the research of Official et al (2016), massage can make children feel comfortable and relaxed, thereby alleviating fatigue. Regarding health, massage can improve blood circulation, thereby providing a relaxing effect (Nahirniak et al, 2019). Banjar people also use coconut oil and shallots to treat fever.…”