CATHETER SYSTEM OF SPECIFIED DEAD SPACE FOR THE DELIVERY OF A LOW VOLUME LIQUID BOLUS

摘要

Several catheter systems (10, 60, 84, 98, 120, 204, 240 and 260) for the delivery of a low volume liquid bolus include a catheter (120) having a proximal end (122), a distal end (126), and an infusion lumen extending therein (132). An administering portion (138, 301) is disposed at the distal end of the catheter, and is configured to administer a bolus of liquid in response to positive pressure in a distal portion of the lumen. The catheter system of the present invention has a dead space of less than 0.32 cc, and preferably less than 0.15 cc in which residual therapeutic agents remain after delivery.