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CN-122005048-A - Single-point pulse ablation pressure catheter and single-point pulse ablation equipment

CN122005048ACN 122005048 ACN122005048 ACN 122005048ACN-122005048-A

Abstract

The application discloses a single-point pulse ablation pressure catheter and single-point pulse ablation equipment, wherein the single-point pulse ablation pressure catheter comprises a front end electrode, a pressure sensing assembly and a pipe body, the front end electrode is arranged at the far end of the pipe body, the pressure sensing assembly comprises a main body structure, two ends of the main body structure are respectively connected with the front end electrode and the pipe body, one or more than two containing grooves along the axial direction and an annular groove along the circumferential direction are arranged on the periphery of the main body structure, and the containing grooves are intersected with the annular groove.

Inventors

  • ZHANG LEI
  • YIN JIE
  • ZHANG XIANGMING

Assignees

  • 上海艾科脉医疗技术有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. The single-point pulse ablation pressure catheter comprises a front end electrode, a pressure sensing assembly and a tube body, wherein the front end electrode is arranged at the far end of the tube body, the pressure sensing assembly comprises a main body structure, and two ends of the main body structure are respectively connected with the front end electrode and the tube body; One or more than two accommodation grooves along the axial direction and an annular groove along the circumferential direction are arranged on the periphery of the main body structure, and the accommodation grooves are intersected with the annular groove.
  2. 2. The single point pulse ablation pressure catheter of claim 1, wherein one or two ring electrodes are sleeved on the catheter body, and the distance between any one ring electrode and the front end electrode is greater than 3mm.
  3. 3. The single point pulse ablation pressure catheter of claim 1, wherein the annular groove has a height in the axial direction of 0.2-1mm.
  4. 4. The single point pulse ablation pressure catheter of claim 1, wherein the annular groove has a radial depth of 0.5-1mm.
  5. 5. The single point pulse ablation pressure catheter of claim 1, wherein the annular groove is located in a middle portion of the body structure.
  6. 6. The single point pulse ablation pressure catheter of claim 1, wherein each of the containment slots includes a first containment unit and a second containment unit, the first and second containment units being located on either side of the annular slot; preferably, a first optical fiber is arranged in the first accommodating unit, a second optical fiber is arranged in the second accommodating unit, and the head end of the first optical fiber is opposite to the head end of the second optical fiber.
  7. 7. The single point pulse ablation pressure catheter of claim 1, wherein an end of the body structure extends into the front electrode; The main body structure is a hollow structure, and the inner wall of the main body structure is provided with an annular clamping ring.
  8. 8. The single point pulse ablation pressure catheter of claim 7, wherein the tube body is provided with a connection assembly at an end proximate the front electrode, the connection assembly having a large diameter end and a small diameter end, and the large diameter end is sleeved at one end of the tube body, and the small diameter end is sleeved in the main body structure in contact with the clamping ring.
  9. 9. The single point pulse ablation pressure catheter of claim 8, wherein a hollowed-out structure is provided on the large diameter end, the first optical fiber extending into the catheter body through the hollowed-out structure.
  10. 10. A single point pulse ablation apparatus comprising the single point pulse ablation pressure catheter of any of claims 1-9.

Description

Single-point pulse ablation pressure catheter and single-point pulse ablation equipment Technical Field The application relates to the technical field of medical catheters, in particular to a single-point pulse ablation pressure catheter and single-point pulse ablation equipment. Background Atrial fibrillation is a common arrhythmia, and radio frequency ablation and cryoablation are two common methods currently used clinically to treat arrhythmias (e.g., atrial fibrillation), where the ablation lesions must be sufficient to destroy the arrhythmic tissue or substantially interfere with or isolate abnormal electrical conduction within the myocardial tissue, but excessive ablation affects surrounding healthy tissue as well as neural tissue. The radiofrequency ablation point-by-point type ablation operation time is long, the requirement on the catheter operation level of an operator is high, the patient is uncomfortable in operation, and pulmonary vein stenosis is easy to occur after operation. Radiofrequency ablation can disrupt the heart endothelial surface, activate an exogenous coagulation cascade, and lead to coke and thrombosis, which in turn can further lead to systemic thromboembolism. Also, the application of rf energy to target tissue may have an effect on non-target tissue, and the application of rf energy to atrial wall tissue may result in esophageal or neurological damage. In addition, radiofrequency ablation can also lead to tissue scarring, further leading to embolic problems. While cryoablation causes a higher rate of phrenic nerve injury, epicardial freezing near the coronary arteries may lead to thrombosis and progressive coronary stenosis. The single-point ablation has the advantages in atrial fibrillation surgery, the single-point ablation operation can enable energy to be concentrated on the head electrode, a good ablation effect is achieved on thicker tissue of cardiac muscle, and meanwhile the single-point ablation mode is convenient for carrying out point-compensating ablation on the position of the dew point during ablation. The latest technology for treating atrial fibrillation is a high-voltage pulse electric field technology, which applies a short pulse high voltage to tissue cells to generate a local high-voltage electric field of hundreds of volts per centimeter, wherein the local high-voltage electric field is higher than a cell voltage penetration threshold, so that irreversible perforation is formed on a cell membrane to destroy the cell membrane, and a biological molecular material is exchanged across the cell membrane to cause cell necrosis or apoptosis. Since different tissue cells have different voltage penetration thresholds, the high voltage pulsed electric field technique can be selectively applied to cardiomyocytes (relatively low threshold) without affecting other non-target tissue (e.g. nerves, esophagus, blood vessels and blood). In addition, the time for releasing energy when the pulse electric field is applied is very short, and the thermal effect can not be generated, so that the problems of tissue injury, pulmonary vein stenosis and the like are avoided. Thus, pulse ablation is a non-thermogenic technique, the damage mechanism is that some cell membranes are provided with nano-scale micropores through high-frequency electric pulses, and potential advantages of pulse ablation for atrial fibrillation ablation include ① with tissue selectivity and protection of surrounding tissues from damage, ② pulse electric field can be rapidly released within a few seconds, ③ does not have coagulation necrosis, and the risk of Pulmonary Vein (PV) stenosis is reduced. For quick ablation, the conventional pulse ablation catheter adopts a multi-point simultaneous ablation mode such as annular, petal-shaped or balloon-shaped modes, but because the pulmonary vein openings are different in shape, the electrode arms are easy to deform or can not be well attached to the pulmonary vein openings, and are not easy to attach, and at the moment, the multi-point pulse ablation is easy to cause leakage points. Disclosure of Invention The application provides a single-point pulse ablation pressure catheter, which aims to solve the problem that pulse ablation is completed to replace single-point radio frequency ablation under the condition that the operation habit of an operator on single-point ablation is not changed at all. Meanwhile, the problem that the esophagus or the nerve is easily damaged and irregular leakage points exist at the pulmonary vein port due to the use of radio frequency energy at the thinner part of the myocardial tissue can be solved. The technical scheme of the application is as follows: 1. The single-point pulse ablation pressure catheter comprises a front end electrode, a pressure sensing assembly and a tube body, wherein the front end electrode is arranged at the far end of the tube body, the pressure sensing assembly comprises a main body structure, and two ends of th