Effect of Total Occlusion of Thoracic Aorta on Blood Pressure, Splanchnic Blood Flow and Metabolic State in Dogs

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Abstract
Total occlusion of the thoracic aorta at the fourth interspace resulted in a sharp drop in arterial pressure to 16 mm Hg below the obstruction and marked increase in arterial pressure above the occlusion. Estimated splanchnic blood flow was reduced approximately 73% during the period of obstruction. Splanchnic O2 consumption did not decrease to the same extent, compensation being brought about by an increase in the arterial-hepatic venous 62 difference. Release of the obstruction resulted in a prompt return of all measured functions to normal levels.

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