Patent ID: 8574225

Claim:
A system for cryogenic treatment of tissue, the system comprising: a controller, the controller comprising: a pulse width scan module, the pulse width scan module configured to implement a pulse width scan, the pulse width scan determining a command pulse width; a treatment protocol module, the treatment protocol module configured to establish a treatment protocol based on the command pulse width received from the pulse width scan module; a treatment implementation module, the treatment implementation module configured to effect a desired cryogenic tissue treatment, the treatment implementation module in communication with the treatment protocol module; a fluid path, the fluid path extending from a reservoir of fluid to a balloon of a balloon catheter and then to an exhaust lumen; a solenoid, the solenoid controlling flow of fluid along the fluid path from the reservoir of fluid to the balloon, the solenoid in communication with the controller; wherein the command pulse width comprises a minimum measured pulse width of the solenoid and a pressure sensor, the pressure sensor monitoring pressure of the fluid in the exhaust lumen, the pressure sensor in communication with the controller.