Patent ID: 9144449
Filing Date: 2015-09-29
Classification: A61B

Abstract:
1. A cryosurgical apparatus for cryogenic spray treatment comprising: a cryogen tank; a cryogen pressure maintenance system; a cryogen level monitoring system connected to said cryogen tank for monitoring a cryogen level in said cryogen tank, said cryogen level monitoring system comprising an electronic sensor internal to the cryogen tank that measures tank cryogen level via resistive or capacitive means, and electronics for communicating the sense value to the onboard computer system; a cryogen tank fill system connected to said cryogen tank and having a port configured to detachably connect to an external cryogen source; a catheter attachment apparatus mounted on said cryosurgical apparatus and connected to said cryogen tank via a manifold assembly; a fluid path pre-cool system arranged between said cryogen tank and said catheter attachment apparatus; user-control system for user-control of cryogen spray mounted to said cryosurgical apparatus and in electronic communication with said manifold assembly; a display screen mounted on said cryosurgical apparatus; and an on-board control system in electronic communication with said cryogen tank fill system, said manifold assembly, and said fluid path pre-cool system, said on-board control system comprising a computer readable medium containing computer readable instructions for monitoring and controlling cryogen tank fill operation, running pre-procedure system checks, controlling fluid path pre-cool, and controlling thermal functions during user treatment of patients.