Systemic response to excretory urography. Work in progress.

Abstract
Patients (97) who were undergoing excretory urography for suspected genitourinary tract abnormalities were continuously monitored for systemic blood pressure and pulse rates before (control) and after rapid i.v. injections of contrast material (1.5 ml/kg meglumine iothalamate, 60%) using a Bard pressure monitor. Clinically obvious reactions to contrast medium were recorded and compared with the blood pressure and pulse rate responses. The most common response to rapid infusion of contrast medium was a transient hypotension. An increase in systemic pressure had a high association with nausea and vomiting. Significant hypotension (mean blood pressure < 60 mm Hg) was observed in 6 patients (6%), but no overt clinical manifestations were present.