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CN-121971157-A - Magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation

CN121971157ACN 121971157 ACN121971157 ACN 121971157ACN-121971157-A

Abstract

The invention discloses a magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation, which relates to the technical field of atrial fibrillation radio frequency ablation and comprises a handle, an adjusting knob and a catheter, wherein the catheter device adopts a magnetic resistance sensor and a central miniature permanent magnet which are uniformly distributed on the circumference by arranging a magnetic sensing assembly, realizes three-dimensional accurate positioning by combining an external magnetic field, reduces or eliminates positioning deviation caused by heart pulsation, covers a hemispherical end by a plurality of miniature thermocouples, is matched with an annular perfusion hole channel, is fully dimensional temperature controlled and uniformly cooled, prevents temperature imbalance, is independently wound in five cavities of a main body section, can be bent by a nickel-titanium spring and a double-layer braided wire, has flexibility and stability, adopts a biocompatible material as a core component, reduces thrombus and anaphylactic risk, is suitable for existing equipment, and is convenient and durable to operate.

Inventors

  • SUN JUNJUN
  • WEI XIAOLI
  • Qin Chunchun

Assignees

  • 柳州市柳江区人民医院

Dates

Publication Date
20260505
Application Date
20260205

Claims (10)

  1. 1. The utility model provides a accurate control by temperature change ablation catheter means of magnetism location for atrial fibrillation radio frequency ablation, its characterized in that includes handle (1), adjust knob (2) and pipe (3), adjust knob (2) assembly is in handle (1) top, the proximal end and the handle (1) fixed connection of pipe (3), pipe (3) are including main part section (31), bendable section (32) and ablation head (33) along axial in proper order, main part section (31), bendable section (32) and ablation head (33) coaxial arrangement and fixed connection in proper order; Five mutually independent and axially penetrating cavities are formed in the main body section (31), an elastic piece (321) is arranged in the bendable section (32), the ablation head (33) comprises a base (332), a hemispherical end (333), a ceramic coating (331), a magnetic sensing component (334), a radio frequency electrode (335), an annular pouring channel (336) and a micro thermocouple sensor (337), the ceramic coating (331) covers the outer surfaces of the base (332) and the hemispherical end (333), the magnetic sensing component (334) and the radio frequency electrode (335) are embedded in the base (332) and the hemispherical end (333), the annular pouring channel (336) is formed in the position, close to the hemispherical end (333), of the base (332), and the micro thermocouple sensor (337) is embedded between the ceramic coating (331) and the base (332); The utility model discloses a radio frequency electrode (335) is worn to be connected with, including main part section (31), stay wire, adjusting knob (2), elastic component (321) transmission are connected respectively to two cavitys of main part section (31), a cavity and annular perfusion channel (336) intercommunication of main part section (31), a cavity of main part section (31) is worn to be equipped with the wire of being connected with magnetic sensing subassembly (334), miniature thermocouple sensor (337), a cavity of main part section (31) is worn to be equipped with the radio frequency wire of being connected with radio frequency electrode (335).
  2. 2. The magnetically positioned accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the five cavities inside the main body section (31) are a left wire drawing cavity (311), a right wire drawing cavity (312), a saline water filling cavity (313), a signal transmission cavity (314) and a radio frequency wire cavity (315), the wire drawing is arranged in the left wire drawing cavity (311) and the right wire drawing cavity (312) in a penetrating manner, the saline water filling cavity (313) is communicated with the annular filling channel (336), the wire is arranged in the signal transmission cavity (314) in a penetrating manner, and the radio frequency wire is arranged in the radio frequency wire cavity (315) in a penetrating manner.
  3. 3. The magnetically positioned accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation according to claim 2, wherein the left pull wire cavity (311) and the right pull wire cavity (312) are symmetrically distributed on two sides of the central axis of the cross section of the main body section (31), the saline perfusion cavity (313) is located right above the central axis of the cross section of the main body section (31), the signal transmission cavity (314) is located right below the central axis of the cross section of the main body section (31), and the radio frequency wire cavity (315) is located at the central position of the cross section of the main body section (31) and coincides with the central axis of the main body section (31).
  4. 4. A magnetically positioned accurate temperature controlled ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the body section (31) is made of medical grade polytetrafluoroethylene material.
  5. 5. The magnetically positioned accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the bendable section (32) further comprises a sleeve (322) and a braiding wire (323), the elastic piece (321) is a nickel-titanium alloy spring and is coaxially arranged inside the sleeve (322), the braiding wire (323) is made of stainless steel and is buried in the inner wall of the sleeve (322) in a double-layer mode, the sleeve (322) is sleeved outside the elastic piece (321), and the sleeve (322) is made of polyimide.
  6. 6. The magnetically positioned precise temperature-controlled ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the magnetic sensing assembly (334) comprises three magnetic resistance sensors (3341) and one miniature permanent magnet (3342), the three magnetic resistance sensors (3341) are uniformly distributed circumferentially, and the miniature permanent magnet (3342) is fixed at the central position of the three magnetic resistance sensors (3341).
  7. 7. The magnetically positioned precise temperature-controlled ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein a plurality of micro thermocouple sensors (337) are arranged, one micro thermocouple sensor (337) is arranged at the top end of the hemispherical end (333), and the rest of micro thermocouple sensors (337) are uniformly distributed along the circumferential direction of the hemispherical end (333).
  8. 8. The magnetically positioned precise temperature-controlled ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the annular perfusion channel (336) is provided with perfusion holes (3361), and the perfusion holes (3361) are uniformly distributed circumferentially.
  9. 9. The magnetically positioned accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the handle (1) is made of an ABS engineering plastic material.
  10. 10. The magnetically positioned and precisely temperature controlled ablation catheter device for atrial fibrillation radio frequency ablation according to claim 1, wherein the base (332) is made of titanium alloy, and the radio frequency electrode (335) is made of platinum iridium alloy and is attached to the inner side of the ceramic coating (331).

Description

Magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation Technical Field The invention relates to atrial fibrillation radio frequency ablation technology, in particular to a magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation. Background Atrial fibrillation radio frequency ablation catheters are a minimally invasive interventional instrument for treating atrial fibrillation. It is delivered to the heart through peripheral blood vessels (such as femoral vein), and the catheter head end can release high frequency radio frequency current to generate 45-60 ℃ thermal effect on local myocardial tissue, and cause myocardial cell coagulation necrosis in the target area, thereby blocking abnormal electric signal conduction paths. The catheter is usually matched with a three-dimensional mapping system for use, so that key lesions of atrial fibrillation such as pulmonary veins and the like can be accurately positioned, circumferential pulmonary vein isolation or atrial matrix improvement can be realized, and the normal rhythm of the heart can be recovered. When the conventional ablation catheter device is used, the positioning structure of the conventional ablation catheter device is designed by adopting single magnetic pole or double magnetic poles, the anti-interference capability on heart pulsation and vascular peristalsis is weak, target positioning deviation is easily caused, the risk of normal myocardial tissue injury is increased, the temperature control system is dependent on a single temperature sensor, an ablation area is difficult to fully cover, a temperature monitoring blind area exists, the problem that the esophagus or the atrial wall is burnt due to local overhigh temperature or the ablation is incomplete and the illness recurs due to the overlow temperature easily occurs, and part of the components are poor in material biocompatibility and structural strength, bending damage is easily caused in the thrombus formation or catheter pushing process, so that the risk of operation complications is increased, the replacement cost of the instrument is also increased, and the suitability and the practicability are poor. Disclosure of Invention The invention aims to provide a magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation, which solves the problems that in the prior art, the ablation catheter device has positioning deviation and temperature control dead zones, and the material strength is insufficient, so that complications are easily caused. In order to achieve the aim, the invention provides the technical scheme that the magnetic positioning accurate temperature control ablation catheter device for atrial fibrillation radio frequency ablation comprises a handle, an adjusting knob and a catheter, wherein the adjusting knob is assembled at the top of the handle, the proximal end of the catheter is fixedly connected with the handle, the catheter comprises a main body section, a bendable section and an ablation head in sequence along the axial direction, and the main body section, the bendable section and the ablation head are coaxially arranged and are sequentially and fixedly connected; Five mutually independent and axially penetrating cavities are formed in the main body section, an elastic piece is arranged in the bendable section, the ablation head comprises a base, a hemispherical end, a ceramic coating, a magnetic sensing assembly, a radio frequency electrode, an annular pouring channel and a miniature thermocouple sensor, the ceramic coating covers the outer surfaces of the base and the hemispherical end, the magnetic sensing assembly and the radio frequency electrode are embedded in the base and the hemispherical end, the annular pouring channel is formed in the position, close to the hemispherical end, of the base, and the miniature thermocouple sensor is embedded between the ceramic coating and the base; The utility model discloses a radio frequency electrode, including main part, main part section, adjusting knob, elastic component, magnetic sensing subassembly, miniature thermocouple sensor, stay wire, adjust knob, elastic component transmission are connected respectively to two cavitys of main part section, a cavity of main part section and annular perfusion channel intercommunication, a cavity of main part section wears to be equipped with the wire of being connected with magnetic sensing subassembly, miniature thermocouple sensor, a cavity of main part section wears to be equipped with the radio frequency wire of being connected with the radio frequency electrode. Further, the five cavities in the main body section are a left-side wire drawing cavity, a right-side wire drawing cavity, a saline filling cavity, a signal transmission cavity and a radio frequency wire cavity respectively,