System for detecting leaks and occlusions in a cryoablation...

Details System for detecting leaks and occlusions in a cryoablation... System for detecting leaks and occlusions in a cryoablation...

2007-01-16

2007-01-16

Peffley, Michael (Department: 3739)

Surgery

Instruments

Cyrogenic application

C606S020000, C606S022000, C606S023000

Reexamination Certificate

active

10881085

ABSTRACT:
A system for detecting leaks and occlusions in a cryoablation catheter requires monitoring pressure in the catheter at the end of two predetermined time intervals. The catheter includes a catheter tube, a cryo-chamber at the distal end of the catheter, and a supply line for introducing fluid refrigerant into the cryo-chamber. Also included is a pressure sensor mounted in the cryo-chamber for measuring a tip pressure. During the first time interval, fluid refrigerant is prevented from flowing through the catheter while the catheter is evacuated by a vacuum pump. The tip pressure is then measured to detect leaks. During the second time interval, fluid refrigerant is introduced into the cryo-chamber while evacuation continues, and the tip pressure is measured to detect occlusions.

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