Patent ID: 9078733
Filing Date: 2015-07-14
Classification: A61B,A61F

Abstract:
1. A closed-loop system for cryosurgery, comprising a closed-loop flow path for a cryofluid at cryogenic temperatures, said closed-loop flow path having a nominal pressure not less than about 9.5 MPa throughout the close-loop flow path and at cryogenic temperatures lower than about 150 Kelvin throughout the closed-loop flow path; a pump for circulating and maintaining said cryofluid at the nominal pressure in said closed-loop flow path, the pump being in fluid communication with the closed-loop fow path such that cryofluid flows from and is returned to the pump; a heat exchanger coupled to a heat sink in said closed-loop flow path for maintaining said cryofluid at cryogenic temperatures; one or more cryoneedles selectively flow connected in said closed-loop flow path, each cryoneedle configured to provide a cryotherapy; and one or more flow control devices in said closed-loop flow path, each flow control device configured for selectively flow connecting and flow disconnecting at least one of said one or more cryoneedles with said closed-loop flow path, thereby enabling and disabling, respectively, a flow of said cryofluid at cryogenic temperatures between said closed-loop flow path and said at least one cryoneedle.