Catheter system of specified dead space for the delivery of...

A - Human Necessities – 61 – M

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A61M 25/14 (2006.01) A61M 5/14 (2006.01) A61M 5/145 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2312468

Several catheter systems for the delivery of a low volume liquid bolus include a catheter having a proximal end, a distal end, and an infusion lumen extending therein. An administering portion 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.

L'invention concerne plusieurs systèmes (10, 60, 84, 98, 120, 204, 240 et 260) de cathéter utiles pour l'administration d'un bolus de liquide de faible volume, qui comportent un cathéter (120) présentant une extrémité (122) proximale, une extrémité (126) distale, et une lumière de perfusion (132) s'étendant dans le cathéter. Une partie (138, 301) d'administration placée à l'extrémité distale du cathéter est conçue pour administrer un bolus de liquide en réponse à une pression positive produite dans une partie distale de la lumière. Le système de cathéter de la présente invention comporte un espace mort inférieur à 0,32 cc, et de préférence inférieur à 0,15 cc, dans lequel des agents thérapeutiques résiduels restent après administration.

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