| 摘要 |
A catheter (52) with a suction lumen (50) and an infusion lumen (18) with seals (56, 22) associated with each, is placed in a patient's vein near a tumor. Flow is then sealed in the vein with the infusion seal (22). A carrier medium dye is injected into the tumor at selected flow rates and differential pressures. Flow of the dye through the tumor is observed on the monitor (12) to determine optimal retrograde perfusion paths through the tumor for the selected flow rates and differential pressures. Once the optimal perfusion paths are noted, a preferential attack area (80) in the tumor is located using a different, less dense carrier dye and increased fluid back pressure in the infusion system. Microspheres with active ingredients, such as chemotherapy, can be selectively perfused through one of the paths in the tumor to the attack site and forced into the tumor, once at the attack site (80), using increased back pressure. |
