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US 8,574,225 B2Granted
Efficient controlled cryogenic fluid delivery into a balloon catheter and other treatment devices
AssigneeBoston Scientific Scimed, Inc.
InventorBryron Reynolds
Life of this patent
Estimating the term…
Abstract
Devices, systems, and methods efficiently dilate and/or cool blood vessels and other body tissues. Controlled cooling with balloon catheters and other probes may be effected by a change in phase of a cryogenic fluid, often after measuring a minimum pulse width for actuating an individual solenoid valve along the cooling fluid path, with the measured pulse width allowing gradual inflation of a balloon without excessive venting of cooling fluid.
Claims20
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.
5 more elements
A system for cryogenic treatment of tissue, the system comprising:
- 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;
- a pressure sensor, the pressure sensor monitoring pressure of the fluid in the exhaust lumen;
- a controller in communication with the solenoid and the pressure sensor, the controller comprising:
- a pulse width scan module configured to determine a minimum electrical pulse for the solenoid in situ;
- a treatment protocol module configured to establish a treatment protocol based on the minimum electrical pulse determined by the pulse width scan module;
- a treatment implementation module to implement the treatment protocol, the treatment implementation module in communication with the treatment protocol module.
4 more elements
Dependencies are inferred from the claim text.