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  • Title: Pulmonary shunting by the bronchial artery in the anaesthetized horse.
    Author: Gleed RD, Dobson A, Hackett RP.
    Journal: Exp Physiol; 1990 Jan; 75(1):115-8. PubMed ID: 2310556.
    Abstract:
    In the quietly standing horse the bronchial arterial blood flow is low, 0.1-0.2% of the pulmonary arterial flow. In horses anaesthetized with halothane, the bronchial arterial flow is reduced by a greater fraction than that in the pulmonary artery. Thus the shunting through the bronchial circulation is decreased about 3-fold by anaesthesia, and cannot, therefore, contribute significantly to the increased alveolar-arterial gradient seen in dorsal recumbency. The results indicate bronchial vasoconstriction under anaesthesia.
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