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Beta-adrenergic agonists increase lung liquid clearance in anesthetized sheep.
Y Berthiaume, … , N C Staub, M A Matthay
Y Berthiaume, … , N C Staub, M A Matthay
Published February 1, 1987
Citation Information: J Clin Invest. 1987;79(2):335-343. https://doi.org/10.1172/JCI112817.
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Research Article

Beta-adrenergic agonists increase lung liquid clearance in anesthetized sheep.

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Abstract

We did experiments to determine whether beta-adrenergic agonists increase lung liquid clearance in anesthetized ventilated adult sheep and, if so, whether the increase is mediated by beta receptors and what mechanism is involved. We instilled 100 ml of autologous serum either alone or with a beta-adrenergic agonist (terbutaline, 10(-5) M, or epinephrine, 5.5 X 10(-6) M) into one lower lobe. After 4 h both terbutaline and epinephrine increased lung liquid clearance. The increase in lung liquid clearance was inhibited when propranolol (a beta blocker) or amiloride (a sodium channel blocker) was added to the terbutaline. Increased clearance was not explained by changes in pulmonary hemodynamics, pulmonary blood flow, or lung lymph flow. We conclude that beta-adrenergic agonists increase lung liquid clearance in anesthetized intact adult sheep. This increase is mediated through beta receptors and probably depends on increased active transport of sodium across the alveolar barrier.

Authors

Y Berthiaume, N C Staub, M A Matthay

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