Single Catheter for Aortic Arch and Selective Cerebral Angiography

Aadvanced across the arch until its tip is in the ascending aorta about 4 cm proximal to the innominate orifice and should be so positioned that the convexity of the H1 curve matches the convexity of the ascending aorta (fig . 1). Con ray 60 is used for both arch and selective injections so that the mechanical injector can be loaded with a single solution for the entire examination. The total volume for arch angiog­ raphy is 20-30 ml injected at rates of 10-15 ml/sec depending on estimates of patient size and cardiac output. Digital angiography is performed using a General Electric OF 3000. The right posterior oblique arch of the average adult requires an exposure of about 800 mA for 0.5 sec at 75 kVp. Results There were no complications and catheter "whipping" has not been a problem. Within the described range of injection rates the catheter has behaved with predictability; specifically,