Abstract

[ABSTRACT.] [Dr. Halsted prefaced his remarks with a brief historical sketch of the results of ligation of the abdominal aorta in animals and man and demonstrated an instrument and the method employed in the application of the metal (aluminum) bands.] With the assistance of my house surgeon, Dr. W. M. F. Sowers, who most zealously aided me in making the experiments, and Dr. E. H. Richardson, a member of the surgical staff of the Johns Hopkins Hospital, during the past twelve months, I have been able to conduct experiments on the aortas of more than one hundred dogs and have noted particularly: 1. The effects of occlusion , partial and complete, immediate, mediate and ultimate on the blood pressure, general and local (above and below the band). The pressure below the band is lowered in proportion, roughly, to the amount of occlusion. The return of the pressure to approximately normal below

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