163 results about "Radiofrequency ablation catheter" patented technology

The invention provides a radio frequency ablation (RFA) catheter system for denervation of sympathetic nerves in renal arteries. The system comprises an ablation catheter, a control handle, a guiding catheter and an ablation generating device and can be provided or not provided with an independent guiding catheter control handle, wherein the ablation catheter is formed by a catheter body section and an ablation section from near end to far end in sequence. The system is characterized in that the front end of the catheter body section also comprises a controllable bending section; the controllable bending section is connected with the control handle by the catheter body section; at least two independent structures are installed on the ablation section; and an ablation head is installed on at least one independent structure. The system can carry out multipoint ablation simultaneously, monitors the ablation effect during operation in real time, and has better mechanical stability.

A multi-pole synchronous pulmonary artery radiofrequency ablation catheter, wherein an adjustment apparatus is arranged on a control handle; a catheter body is hollow, and a cavity is arranged therein; a lead wire, a temperature sensing wire and a pull wire are arranged in the cavity; one end of the catheter body is flexible, and the flexible end is connected to an annular ring; the annular ring is provided with an electrode group with each electrode connected to the lead wire and temperature sensing wire; the lead wire and temperature sensing wire go through the catheter body and are electrically connected to the control handle. The device uses cold saline perfusion method to protect the vascular intima and possesses advantages of simple operation, short operation time and controllable precise ablation. The device can be used to treat pulmonary hypertension with pulmonary denervation.

A radiofrequency ablation catheter having a meshed tubular stent structure and an apparatus thereof, include a meshed tubular stent disposed at a front end of the catheter. The meshed tubular stent comprises and including a meshed tube (1). Both ends of the meshed tube are tapered to form a distal end and a proximal end of the meshed tubular stent. The intermediate segment of the meshed tubular stent has a contracted state and an expanded state. One or more electrodes (2) are fixed onto the intermediate segment. The radiofrequency ablation catheter has improved flexibility and provides great coverage for the blood vessels with different thicknesses and curves. When the meshed tubular stent expands in the blood vessels having different thicknesses of 4-12 mm, all of the electrodes (2) contact the walls. Moreover, when the meshed tubular stent expands in the curved blood vessels, all of the electrodes are ensured to contact the walls.

The invention discloses a perfusion radiofrequency ablation catheter, which comprises a catheter body, the catheter body has a distal end, a proximal end and a central cavity, an ablation part is fixed at the distal end of the catheter body, and an ablation part is fixed at the proximal end of the catheter body. A control handle is fixed; the ablation part includes an elastic head-end tube, the elastic head-end tube has a distal end, a proximal end and at least one cavity, and an ablation electrode is arranged at the distal end of the elastic head-end tube; The ablation electrode includes an electrode housing, which includes at least one cavity, and the ablation electrode is provided with a small hole; the perfusion liquid can flow into the cavity of the ablation electrode through the pipeline, and flow out from the small hole; The effective total area of ​​the small holes is smaller than the effective cross-sectional area of ​​the pipeline. The perfusion radiofrequency ablation catheter of the present invention effectively reduces the chance of blood coagulation and improves the cooling effect.

The invention discloses a guide wire and catheter system for radiofrequency ablation of renal artery sympathetic nerves, and aims to solve the problem that in the prior art, the position of a radiofrequency ablation electrode can not be well adjusted, so that the safe and efficient ablation can not be realized. The guide wire and catheter system comprises a radiofrequency ablation catheter, a guide wire sleeved by the radiofrequency ablation catheter, a loading sheath and a Y-shaped hemostasis valve arranged at the tail end of the radiofrequency ablation catheter, wherein the radiofrequency ablation catheter is sleeved by the loading sheath. By the adoption of the guide wire and catheter system, the bilateral renal artery sympathetic nerve radiofrequency ablation can be realized more accurately, safely and efficiently, and a more excellent catheter solution is provided for patients with hypertension.

The invention relates to a medical apparatus of interventional therapy, and particularly relates to a radiofrequency ablation electrode catheter used for curing refractoriness hypertension through per cutem and blood vessel to enter into renal artery. According to the invention, the technical problem to be solved is that a sympathetic nerve on the arterial canal of the renal artery can be effectively removed, so that damages to the inner wall of the vessel can be reduced. According to the invention, the radiofrequency ablation controlled electrode catheter for renal artery is provided with a catheter body, wherein an electrode is connected with a far-end of the catheter body; a control handle is connected with a near-end of the catheter body; an ablation electrode and a monitoring electrode are arranged at the far-end of the catheter body along the axis of the catheter body; and an interval is arranged between the ablation electrode and the monitoring electrode. Compared with prior art, the invention is in characterized in that no fill orifice is arranged on the ablation electrode; the monitoring electrode adjoins the ablation electrode through the interval; the temperature of the sympathetic nerve which is ablated is monitored during the ablation process, so as to judge a clinical treatment required value is reached; also, the conduction of sympathetic nerve signal acquired through monitoring the electrodes, and the comparison of conduction waveforms of the sympathetic nerve before and after ablation, can provide supplementary means for judging if a surgical operation end is finished or not.

An ablation catheter has an imager useful in connection with an ablation operation such as used in the treatment of a cardiac arrhythmia. The catheter has an ablation electrode positioned on a catheter tip, and the imager is located on a side of the catheter. Because the catheter tip is generally articulated when the lesion is formed, this position of the imager provides an image that corresponds with the position of the catheter when it is used to form a lesion. Rings for recording tissue electrograms are also positioned on the catheter tip. This arrangement allows the user to accurately place and contact the electrode and to monitor the ablation process such as by viewing bubbles and thrombi that may undesirably be formed.

The invention relates to a control method, a control device and a computer readable storage medium of radiofrequency ablation, a radiofrequency ablation catheter and a lung radiofrequency ablation system. The control method of the radiofrequency ablation comprises the following steps of S100, obtaining the temperature information of the surrounding of a motor in the ablation process; S110, comparing the temperature information and the temperature threshold value; S120, when the temperature information and the temperature threshold value meet the preset relationship, sending an ablation stopping command. The control method of the radiofrequency ablation has the advantage that the ablation process is controlled by monitoring the problem of the surrounding of the electrode in the ablation process.

Disclosed are a radio-frequency ablation catheter having a spiral structure and device thereof. The radio-frequency ablation catheter has an elongated catheter body. A spiral electrode support is arranged at the front end of the catheter body. Multiple electrodes are arranged on the electrode support. A control handle is arranged at the rear end of the catheter body. Wall-attachment adjusting wires having various structures can be arranged in the radio-frequency ablation catheter, so that the radio-frequency ablation catheter having a spiral structure can be adapted to target vessels of different diameters, and so that the electrodes on the electrode support have a good wall-attachment state.

The invention provides a radiofrequency ablation catheter of a spiral structure and a device with the radiofrequency ablation catheter. The radiofrequency ablation catheter has a linear catheter body, a spiral electrode support is arranged at the front end of the catheter body, multiple electrodes are arranged on the electrode support, and a control handle is arranged at the rear end of the catheter body. A slidable supporting wall-attached adjusting wire is arranged in a tubular cavity of the electrode support or a tubular cavity of the catheter body, and comprises a flexible section away from the control handle and a rigid section close to the control handle. According to the radiofrequency ablation catheter, the structure of the supporting wall-attached adjusting wire is improved, so that the difficulty for the radiofrequency ablation catheter to enter a guiding pipe/sheath pipe is lowered remarkably.

The invention discloses a radiofrequency ablation catheter for implementing pulmonary nerve ablation, and a radiofrequency ablation system. The radiofrequency ablation catheter comprises a core tube assembly and a plurality of electrodes installed on the core tube assembly, the core tube assembly comprises a core tube, the far end part of the core tube is an expansion part, the expansion part hasa loading state and an expansion state which are opposite to each other, the expansion part in the expansion state is in a closed or open ring shape, and the electrodes are arranged on the expansion part at intervals; and a conveying channel is further arranged in the core tube assembly, one end of the conveying channel is used for being connected with a cooling medium conveying device, and the other end of the conveying channel extends to the expansion part and is independently provided with an output port for each electrode. The arrangement of the expansion part makes the core tube assemblyrealize stable, convenient and accurate ablation operation on respiratory tracts with different positions and shapes, and the operation efficiency and the treatment effect are improved.

Systems and methods for performing RF ablation while monitoring the procedure using low coherence interferometry (LCI) data are described. A catheter includes a distal section, a proximal section, a multiplexer, and a sheath coupled between the distal section and the proximal section. The distal section includes several interconnected optical ports configured to transmit exposure radiation toward a sample and receive radiation that have been reflected or scattered from the sample. The interconnected optical ports are formed on a substrate having rigid sections and flexible sections arranged around the distal section. A holder maintains the interconnected optical elements in a fixed spatial relationship.