Control system for cryosurgery

A - Human Necessities – 61 – B

Patent

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A61B 18/02 (2006.01) A61B 17/00 (2006.01) F25B 9/02 (2006.01)

Patent

CA 2418893

An apparatus and method for automatic operation of a refrigeration system (10) to provide refrigeration power to a catheter for tissue ablation or mapping. The primary refrigeration system (208) can be open loop or closed loop, and a precool loop will typically be closed loop. Equipment and procedures are disclosed for bringing the system to the desired operational state, for controlling the operation by controlling refrigerant flow rate, for performing safety checks, and for achieving safe shutdown.

L'invention concerne un dispositif et un procédé de commande automatique d'un système de réfrigération (10) conçu pour fournir une puissance de réfrigération à un cathéter d'ablation ou de cartographie de tissus. Le système primaire de réfrigération (208) peut être en boucle ouverte ou fermée, tandis qu'une boucle de préréfrigération est généralement une boucle fermée. L'invention concerne encore le matériel et les techniques servant à porter le système à l'état opérationnel recherché, aux fins de maîtrise de la commande de ce système -par commande du débit du réfrigérant-, d'exécution des vérifications de sécurité et d'exécution d'un arrêt sûr.

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