Method and apparatus for inflating and deflating balloon...

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/10 (2006.01) A61B 18/02 (2006.01) A61B 18/04 (2006.01) A61B 18/18 (2006.01)

Patent

CA 2555441

A system and method for controlling inflation, ablation, and deflation of a balloon catheter, including a catheter, a console having a pressurized gas or liquid inflation source, and an umbilical system to deliver coolant. A pressure-sensing device monitors pressure and volume within the catheter. During inflation, pressure and/or volume of fluid within the balloon is maintained to provide sufficient pressure against the target region. Inflation pressure is limited so a safe quantity of gas would be released should a leak occur. If the amount falls below a threshold, fluid egress is presumed, halting inflation. An intermediate console having a shut-off valve may be coupled between the console and catheter to interrupt coolant flow upon leak detection. The balloon can be re-inflated by a separate coolant source in the intermediate station or by a syringe. A second balloon may envelope the first balloon, providing a safety vacuum between the two balloons.

L'invention concerne un système et un procédé permettant de contrôler le gonflage, le retrait et le dégonflage d'un cathéter à ballonnet. On décrit un cathéter, une console à source de gaz ou de liquide sous pression, et un système ombilical fournissant un agent de refroidissement. Un dispositif de contrôle de pression contrôle la pression et le volume dans le cathéter. Durant le gonflage, on maintient la pression et/ou le volume de fluide dans le ballonnet, pour assurer une pression suffisante contre la zone cible. La pression de gonflage est limitée de manière à libérer une quantité de gaz fiable en cas de fuite. Si la quantité descend sous un seuil, la sortie de fluide est présumée, et le gonflage s'interrompt. Il est possible de coupler une console intermédiaire à soupape d'arrêt entre la console et le cathéter, afin d'interrompre le flux d'agent de refroidissement en cas de détection de fuite. Le ballonnet peut être regonflé par une source séparée d'agent de refroidissement dans la station intermédiaire ou par une seringue. Un second ballonnet peut envelopper le premier ballonnet, assurant un vide de sécurité entre les deux ballonnets.

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