Patent application number | Description | Published |
20090118723 | COOLANT INJECTION TUBE - A medical device includes a steering element defining a passage for a guide wire. A fluid injection tube defining a proximal and a distal end is also included, wherein a portion of the fluid injection tube is contoured about a portion of the steering element. A plurality of injection ports may be disposed in the portion of the fluid injection tube contoured about the steering element. | 05-07-2009 |
20090287201 | THERMOCOUPLE-CONTROLLED CATETHER COOLING SYSTEM - The present invention provides a medical system, including a catheter defining an injection lumen, a chamber in fluid communication with the injection lumen, and an exhaust lumen in fluid communication with the chamber; a first temperature sensor positioned in the exhaust lumen proximal to the chamber; a second temperature sensor positioned in the chamber; and a console in electrical communication with the first and second temperature sensors, the controller modifying coolant flow through the medical device based at least in part upon a signal received from the first and second temperature sensor. The system may further include a thermally-conductive element circumscribing a substantial portion of the exhaust lumen proximal to the chamber, where the first temperature sensor is mounted to the thermally-conductive element, and the thermally-conductive element may include at least one of a braid, coil, and band. | 11-19-2009 |
20100286676 | CRYOSURGICAL CATHETER - A cryogenic catheter includes an outer flexible member having at least one cryogenic fluid path through the flexible member. The at least one fluid path is defined by a plurality of flexible members disposed within the outer flexible member. | 11-11-2010 |
20100286677 | CRYOSURGICAL CATHETER - A cryogenic catheter includes an outer flexible member having at least one cryogenic fluid path through the flexible member. The at least one fluid path is defined by a plurality of flexible members disposed within the outer flexible member. | 11-11-2010 |
20110054453 | CRYOTREATMENT DEVICE USING A SUPERCRITICAL GAS - A method of cryogenically treating a tissue region is provided, including positioning a treatment region of a medical device proximate the tissue region; transferring coolant in a substantially liquid phase from a coolant reservoir to a subcooler; transitioning the coolant from the liquid phase into a supercritical state; transferring the supercritical coolant to the treatment region; changing the coolant from the supercritical state to at least one of a liquid phase and a gaseous phase at the treatment region; ablating the tissue region; and evacuating coolant from the treatment region of the medical device. | 03-03-2011 |
20120010605 | CRYOSURGICAL CATHETER - A cryogenic catheter includes an outer flexible member having at least one cryogenic fluid path through the flexible member. The at least one fluid path is defined by a plurality of flexible members disposed within the outer flexible member. | 01-12-2012 |
20120029494 | DEVICE AND METHOD FOR PULMONARY VEIN ISOLATION - An intravascular catheter is provided, including a flexible elongate body; an expandable element positioned on the elongate body; a substantially linear thermal segment located distally of the expandable element; a first fluid flow path in fluid communication with the expandable element; and a second fluid flow path in fluid communication with the substantially linear thermal segment. | 02-02-2012 |
20120109118 | CRYOGENIC-RADIOFREQUENCY ABLATION SYSTEM - A medical treatment system, including a catheter body defining a fluid flow path therethrough; an expandable element disposed on the catheter body, the expandable element defining a cooling chamber therein in fluid communication with the fluid flow path; a plurality of electrodes disposed on the expandable element; a cryogenic fluid source in fluid communication with the fluid flow path; and a radiofrequency energy source in electrical communication with the plurality of electrodes. A method of treating a cardiac tissue site proximate an orifice, including substantially occluding the orifice with an expandable element; powering a plurality of electrodes coupled to the expandable element to reach a predetermined target temperature; circulating a coolant through the expandable element to freeze portions of the cardiac tissue site located between the plurality of electrodes; and ablating the non-frozen portions of the tissue site with the plurality of electrodes. | 05-03-2012 |
20120109119 | COMPATIBLE CRYOGENIC COOLING SYSTEM - A method of operating a medical system, including coupling a medical system to an outlet of a fluid distribution network having a plurality of fluid outlets in a patient treatment center; delivering fluid from the outlet to the medical system; compressing the delivered fluid with the medical system; decreasing the moisture content of the delivered fluid with the medical system; cooling the fluid with the medical system; delivering the fluid from the medical system to a medical device; and removing the fluid from medical device with the medical system. | 05-03-2012 |
20120165802 | METHOD AND SYSTEM TO PREVENT COMPLETE OBSTRUCTION IN CATHETER IN CASE OF A KINK - A medical device comprising a shaft having a kink radius; a tube disposed within the shaft; a fluid source in fluid communication with the tube; an elongate member disposed within the tube, and the elongate member imparting a kink radius on the tube, the imparted kink radius of the tube being larger than the kink radius of the shaft. | 06-28-2012 |
20120245574 | Spray nozzle design for a catheter - A catheter-based medical device including controlled refrigerant dispersion is disclosed. The device includes a fluid injection tube that carries refrigerant from a coolant supply to the distal portion of the device. A fluid dispersion unit is disposed on the distal end of the fluid tube to control the angle of distribution for refrigerant that is expelled from the fluid injection tube. Controlling the angle of distribution for the refrigerant facilitates dispersion of the fluid in a predetermined spray pattern. The disclosure further relates to cryoablation treatment systems incorporating such a catheter, and to cryoablation treatment methods for tissue treatment to address various conditions suitably treatable with cryoablation. | 09-27-2012 |
20130104993 | SYSTEMS AND METHODS FOR VARIABLE INJECTION FLOW | 05-02-2013 |
20130110098 | CRYOGENIC BALLOON DEVICE WITH RADIOFREQUENCY TIP | 05-02-2013 |
20130110099 | SYSTEMS AND METHODS FOR VARIABLE INJECTION FLOW | 05-02-2013 |
20130110100 | SYSTEMS AND METHODS FOR VARIABLE INJECTION FLOW | 05-02-2013 |
20130110148 | SYSTEMS AND METHODS FOR CRYOADHESIVE TRANSSEPTAL PUNCTURES | 05-02-2013 |
20130197499 | BALLOON DESIGN TO ENHANCE COOLING UNIFORMITY - A device, system, and method for enhancing cooling uniformity and efficiency of cryogenic fluids and providing a treatment element the shape of which can be adjusted for multiple purposes. The device may include a balloon catheter and fluid dispersion element, the fluid dispersion element directing the flow of coolant from a fluid injection element the interior wall of the balloon. The method of changing the shape of the treatment element may include retracting and extending a shaft to which the distal neck of a balloon is coupled, so that the balloon goes from a first shape to a second shape. | 08-01-2013 |
20140031804 | DEVICE AND METHOD FOR ABLATING TISSUE - A method and system for ablating a tissue region. In an exemplary embodiment, the method includes positioning a medical device including a deformable and helical distal portion in contact with a tissue region, the a helical distal portion including a plurality of turns each having a diameter, the diameter of each turn being greater than the diameter of the next distal turn, compressing the helical distal portion against the tissue region, deforming the distal portion into a substantially concentric spiral, and activating one or more treatment elements and ablating the target tissue. The method may further include advancing the uncompressed helical distal portion into a hollow anatomical feature, such as a pulmonary vein, and activating one or more treatment elements and ablating the target tissue. | 01-30-2014 |