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CN-122005061-A - Catheter integrating pulse field and radio frequency energy and having mapping function

CN122005061ACN 122005061 ACN122005061 ACN 122005061ACN-122005061-A

Abstract

The application belongs to the field of medical instruments, and provides a catheter integrating a pulse field and radio frequency energy and having a mapping function, which comprises a catheter body, a head electrode, a balloon and a ring electrode, wherein the head electrode is arranged at the distal end of the catheter body and comprises a plurality of branch electrodes which are distributed along the circumferential direction and are bent inwards, the balloon is arranged in an area surrounded by the plurality of branch electrodes, the balloon is connected with the distal end of the catheter body and communicated with a lumen, the ring electrode comprises an ablation ring electrode and a positioning ring electrode, the ablation ring electrode is provided with a plurality of ablation ring electrodes arranged on the outer surfaces of the branch electrodes, and the positioning ring electrode is arranged at the distal end of the catheter body and is used for realizing electric signal acquisition and positioning of the spatial posture of the catheter body. The application combines mapping, radio frequency ablation and pulse ablation, so that pulse and radio frequency dual-mode energy output can be realized on the same catheter, and the application can be used for treating volatile atrial fibrillation and continuous atrial fibrillation.

Inventors

  • HE JIANG
  • ZHOU ZAIFENG
  • CAI YANLI

Assignees

  • 剑虎医疗科技(苏州)有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. A catheter integrating pulse field and radio frequency energy and having a mapping function comprises a catheter body, and is characterized by further comprising: a head electrode mounted on a distal end of the catheter body as an energy electrode of PFA and RFA, the head electrode including a plurality of branched poles distributed in a circumferential direction and bent inward; The balloon is arranged in an area surrounded by the plurality of branches, is connected with the distal end of the catheter body and is communicated with the lumen, and saline is poured into the balloon and sprayed outwards through the operation of the luer seat so as to reduce the temperature of the electrode; The ring electrode comprises an ablation ring electrode and a positioning ring electrode, the ablation ring electrode is provided with a plurality of electrodes arranged on the outer surface of the branch electrode, the positioning ring electrode is arranged at the far end of the catheter body, and the electrical signal acquisition and the positioning catheter body space posture are realized through the ablation ring electrode and the positioning ring electrode.
  2. 2. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: The plurality of branch poles are connected into a spherical supporting frame.
  3. 3. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: the head electrode is made of nickel-titanium alloy.
  4. 4. The catheter with mapping function integrating pulsed field and RF energy of claim 1, further comprising a thermocouple wire extending to the head electrode, the thermocouple wire being connected to the balloon for monitoring the temperature of the head electrode in real time during RF ablation.
  5. 5. The catheter of claim 1, wherein the balloon is made of one or more of thermoplastic polyurethane, silicone, polyethylene terephthalate, and polyether block amide.
  6. 6. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: the head electrode can transmit radio frequency energy from a radio frequency ablation instrument to an ablation site; Or the head electrode and any one of the ablating loop electrodes are matched for use, so that the ablating energy from the pulse ablator can be transmitted to the ablating part; Or the ablation ring electrodes are matched for use, so that the ablation energy from the pulse ablation instrument can be transmitted to the ablation part; Or the head electrode is matched with the negative plate, so that pulse energy from the pulse ablator can be transmitted to an ablation part; Or the head electrode is used as a mapping catheter, and can be used for acquiring and recording electrophysiological signals.
  7. 7. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: the surface of the saccule is provided with micropores with the diameter of 0.02-0.05 mm.
  8. 8. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: The catheter body comprises a connecting section, a bending section, a main body section and a handle which are connected, the positioning electrode is arranged on the connecting section, and the bending section is used for changing the bending angle of the catheter body.
  9. 9. The catheter with mapping function and integrating pulse field and radio frequency energy as set forth in claim 1, wherein the catheter body has drawing wire and cooling channel, the bending of the bending section is realized by the drawing wire, the thermocouple core wire extends to the head electrode, and the pouring hole is communicated with the cooling channel.
  10. 10. The catheter of claim 1, wherein the catheter is configured to collect pulsed field and rf energy and has a mapping function, and wherein: And the ablating loop electrodes on the adjacent branch rods are arranged opposite to each other or are arranged in a staggered manner.

Description

Catheter integrating pulse field and radio frequency energy and having mapping function Technical Field The invention belongs to the field of medical instruments, and relates to an electrophysiological catheter, in particular to a catheter which integrates a pulse field and radio frequency energy and has a mapping function. Background Atrial fibrillation is an arrhythmia accompanied by uncoordinated atrial electrical activity, resulting in ineffective atrial contractions, which may clinically cause various serious diseases such as arrhythmia, cerebral stroke, heart failure, and even fatal heart embolism. Pulmonary veins are the main cause of atrial fibrillation due to the presence of pulmonary vein cuffs. Between the intima and adventitia of the pulmonary vein, there is a cardiomyocyte colony, and since the cells forming the myocardial cuff and the atrial muscle are different in origin, the electrophysiological properties are also different, and thus an abnormally excited matrix is formed, resulting in atrial fibrillation. When heart disease is treated in the electrophysiological field, abnormal myocardial tissue needs to be treated, and the currently commonly used treatment methods are radio frequency, cryoablation and pulsed field ablation. Radiofrequency ablation (RFA) is simple in structure and easy to operate, so that more clinical application is achieved, but as one of thermal ablation, radiofrequency ablation can cause surrounding tissue damage in the ablation process, and the problem of incomplete ablation due to deeper focus positions can exist. Pulse ablation (PFA) uses high voltage short electrical pulses to create an "electroporation" effect on the cell membrane, selectively destroying myocardial cells, avoiding vascular and nerve damage. Most of ablation catheters in the current market are single energy, and the main treatment is paroxysmal atrial fibrillation, and the maintenance mechanism of atrial fibrillation is far more than pulmonary veins. For sustained atrial fibrillation, matrix modification is often required, such as linear ablation (top line, mitral isthmus line), ablation at the site of the electrical fracture, etc. Disclosure of Invention The invention provides a catheter integrating pulse field and radio frequency energy and having a mapping function, which aims to overcome the defects of the prior art. The catheter can be used for treating volatile atrial fibrillation and persistent atrial fibrillation. The catheter integrating the pulse field and the radio frequency energy and having the mapping function comprises a catheter body, a head electrode, a balloon and a ring electrode; The head electrode is arranged at the distal end of the catheter main body and used as an energy electrode of PFA and RFA, and comprises a plurality of branch electrodes which are distributed along the circumferential direction and are bent inwards; The balloon is arranged in an area surrounded by a plurality of branches, is connected with the distal end of the catheter body and is communicated with the lumen, and saline is poured into the balloon and sprayed outwards through the operation of the luer seat so as to reduce the temperature of the electrode; The ring electrode comprises an ablating ring electrode and a positioning ring electrode, the ablating ring electrode is provided with a plurality of electrodes arranged on the outer surface of the branch electrode, the ablating ring electrode is insulated from the branch electrode, the positioning ring electrode is arranged at the far end of the catheter body, and the electrical signal acquisition and the positioning catheter body space posture are realized through the ablating ring electrode and the positioning ring electrode. Further, the plurality of branch poles are connected into a spherical supporting frame. Further, the catheter inner ring is provided with a thermocouple wire, the thermocouple wire extends to the head electrode, and the thermocouple wire is connected with the balloon so as to be used for monitoring the temperature of the head electrode in real time during radio frequency ablation. Further, the head electrode can transmit radio frequency energy from a radio frequency ablator to an ablation site; Or the head electrode and any one of the ablating loop electrodes are matched for use, so that the ablating energy from the pulse ablator can be transmitted to the ablating part; Or the ablation ring electrodes are matched for use, so that the ablation energy from the pulse ablation instrument can be transmitted to the ablation part; Or the head electrode is matched with the negative plate, so that pulse energy from the pulse ablator can be transmitted to an ablation part; Or the head electrode is used as a mapping catheter, and can be used for acquiring and recording electrophysiological signals. Further, a traction wire and a cooling channel are arranged in the catheter body, bending of the bending section is achieved through the tract