Journal of Applied Physiology
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J Appl Physiol 60: 1549-1553, 1986;
8750-7587/86 $5.00
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Journal of Applied Physiology, Vol 60, Issue 5 1549-1553, Copyright © 1986 by American Physiological Society

ARTICLES

Plasma volume and proteins in voluntary hyperventilation

M. Staubli, F. Rohner, P. Kammer, W. Ziegler and P. W. Straub

In a controlled study the changes of the plasma volume and plasma proteins induced by voluntary hyperventilation (HV) were investigated in nine splenectomized volunteers. The plasma volume changes were calculated from the changes of the hemoglobin and hematocrit. After 20 min of HV in supine position, which lead to a decrease of the venous CO2 partial pressure by 19 Torr and to an increase of plasma epinephrine and norepinephrine levels, the plasma volume was reduced by 12.9%. The intravascular masses of total protein, albumin, and several other proteins decreased during HV but a similar decrease of these proteins was also observed during the control study (C), i.e., rest in supine position without HV. The differences between changes during HV and C were not significant, indicating that the loss of protein was not due to HV. It is concluded that acute HV leads to a rapidly reversible loss of a virtually protein-free solution from the vascular space. The red cell compartment participated in fluid shifts in that the mean red cell volume decreased by 2.2% (P less than 0.02 compared with C). Comparison with earlier work shows that addition of erythrocytes from the normal spleen does not play a part in the HV-induced increase of hemoglobin and hematocrit.


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S. C. Forbes, J. M. Kowalchuk, R. T. Thompson, and G. D. Marsh
Effects of hyperventilation on phosphocreatine kinetics and muscle deoxygenation during moderate-intensity plantar flexion exercise
J Appl Physiol, April 1, 2007; 102(4): 1565 - 1573.
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