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Reveals that protamine injection reduces arterial pressure and oxygenation while elevating pulmonary artery pressure after bypass, highlighting transient circulatory strain.
Jastrzebski, J., Sykes, M. K., and Woods, D. G. (1974).Thorax, 29, 534-538. Cardiorespiratory effects of protamine after cardiopulmonary bypass in man. The cardiorespiratory changes following the injection of protamine sulphate (6 mg/kg) were studied in 15 patients who had undergone cardiopulmonary bypass. There was a transient fall in arterial pressure and a more prolonged increase in pulmonary artery pressure. There was a significant fall in arterial oxygen tension which was mainly due to a reduction in mixed venous oxygen tension resulting from a fall in cardiac output. Dead space/tidal volume ratio and percentage shunt did not change significantly.
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Jastrzębski et al. (1974) studied this question.
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