Control system for cryosurgery

USRE40815E1 · kind E1 · reissue

Assignee

• AMS Research Corporation · US

Inventors

• Ravikumar Kudaravalli · Florence, US
• Hong Li · Nanhu, CN

Key dates

• Filing date: Oct 1, 2007
• Grant date: Jun 30, 2009
• Expiry date: Oct 1, 2027

Classification

• Technology area (CPC —): General

Abstract

An apparatus and method for automatic operation of a refrigeration system to provide refrigeration power to a catheter for tissue ablation or mapping. The primary refrigeration system 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.