Circulatory and respiratory effects of whole-body vibration in anesthetized dogs

Abstract

Effects of whole body x-axis sinusoidal vibration were studied in 27 anesthetized dogs. At a vibratory frequency of 10 cycles/sec and at levels of peak acceleration greater than 0.3 g, increases in the accelerative force of vibration were accompanied by increases in mean arterial blood pressure, heart rate, cardiac output, oxygen consumption, central blood volume, and minute volume of ventilation. Peripheral vascular resistance decreased under the same conditions. At 6 cycles/sec similar results were obtained, the only significant differences being in blood pressure and heart rate response. In three animals curare partially blocked the increase in oxygen consumption during vibration. Reserpine had no effect in two other animals. These studies suggest that the circulatory responses observed during whole-body vibration are due to muscular exercise. vibration physiology; acceleration physiology; biomechanics; vibration and exercise; curare and vibration response; reserpine and vibration response Submitted on February 1, 1965

Why Can Whole Body Vibration (WBV) Cause Redness on Volunteers? The Effect of Mechanical Vibration and Anxiety on Peripheral Blood Flow

“…One study 3 in dogs and 2 studies 4,6 in humans used similar amplitude and frequency to that used in the experimental study by GRAVI HB /UFMG, arriving to the same conclusions, corroborating to the hypothesis of the study. Therefore, although the region investigated was different, similar conclusion may be drawn.…”

The Effects of Negative Pressure External High Frequency Oscillation on Cerebral Blood Flow and Cardiac Output of the Monkey

“…These include increases in respiratory rate, tidal ventilation, and oxygen consumption (18); increases in cardiac output, pulse pressure, and heart rate (19,20); reductions in systemic vascular resistance (2 1); regional peripheral vasoconstriction (22); reduction in blood eosinophil count and increase in neutrophil count (23); histological renal and hepatic changes (24) and increase in blood SGOT concentration (24); chest and abdominal discomfort and pain (25); and death (26). Despite these reported adverse effects of vibration, HFV has been introduced for clinical practice without a full evaluation of its safety.…”

Human Limitations in Operation of Aerospace Systems: Circulatory Regulation during Combined Flight Stresses

“…Acceleration dependence of cardiovascular changes has also been demonstrated in animals (Hood and Higgins, 1965;Liedtke aud Schmid, 1969). More marked physiological effects were found at 1.2 g and 8 and 10 Hz than at 0.6 g and frequencies on either side of that range (Hood, et al, 1966).…”