CN209826957U

CN209826957U - Ablation electrode and catheter matched with same

Info

Publication number: CN209826957U
Application number: CN201920183689.4U
Authority: CN
Inventors: 刘刚; 谭茂彩; 刘继勇
Original assignee: KOSSEL MEDICAL TECHNOLOGY (SUZHOU) Co Ltd
Current assignee: KOSSEL MEDICAL TECHNOLOGY (SUZHOU) Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2019-12-24
Anticipated expiration: 2029-02-01

Abstract

The utility model discloses an ablation electrode and a catheter matched with the ablation electrode, which comprises a main body section, a stay wire, a lead and a thermocouple, wherein the main body section comprises a near end and a far end; the main body section is provided with a first hole and a second hole at the proximal end, and the first hole and the second hole are not communicated with each other; the end part of the stay wire and the end part of the lead are fixed in the first hole; the end part of the thermocouple is fixed in the second hole, and the thermocouple comprises a temperature measuring line and a temperature measuring point positioned at the end part of the temperature measuring line; an insulator is arranged between the thermocouple and the second hole, and an insulating layer is arranged on the outer wall of the temperature measuring wire to insulate the thermocouple and the wire. The utility model discloses the survey that can be accurate stable melts the temperature.

Description

Ablation electrode and catheter matched with same

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to melt electrode and with this melt electrode complex pipe.

Background

The cardiac Radio Frequency Ablation (Catheter Radio Frequency Ablation) is an interventional technique that a Catheter with an Ablation electrode is sent to a specific part of a heart cavity through veins or artery blood vessels, Radio Frequency current is released to the Ablation electrode, and the temperature of the joint (Ablation target point) of the Ablation electrode and the heart cavity rises, so that tissue coagulation necrosis of the Ablation target point is caused, and the abnormal conduction beam and the initiation point of the rapid arrhythmia are blocked. The damage range of the radio frequency current led into the heart cavity through the catheter is 1-3mm, and the harm to the organism can not be caused. Cardiac radio frequency ablation has now become the most effective method for the radical treatment of paroxysmal tachycardia.

In order to improve the success rate and safety of the operation during the ablation process, the temperature of an ablation target point (ablation temperature) needs to be monitored in real time, and a temperature sensor, such as a thermocouple, is generally additionally arranged on the ablation electrode accessory. The thermocouple electrical signal is easy to interfere with the radio frequency current of the ablation electrode, and affects the temperature measurement, so that the ablation electrode capable of accurately and stably measuring the ablation temperature and the catheter matched with the ablation electrode need to be provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an ablation electrode and with this ablation electrode complex pipe, its survey that can be accurate stable melts the temperature.

In order to solve the technical problem, the utility model provides an ablation electrode, which comprises a main body section, a pull wire, a lead and a thermocouple, wherein the main body section comprises a near end and a far end; the main body section is provided with a first hole and a second hole at the proximal end, and the first hole and the second hole are not communicated with each other; the end part of the stay wire and the end part of the lead are fixed in the first hole; the end part of the thermocouple is fixed in the second hole, and the thermocouple comprises a temperature measuring line and a temperature measuring point positioned at the end part of the temperature measuring line; an insulator is arranged between the thermocouple and the second hole, and an insulating layer is arranged on the outer wall of the temperature measuring wire to insulate the thermocouple and the wire.

Further, the axis of the second bore forms an included angle with the axis of the main body section, and the included angle is an acute angle at the proximal end; the bottom of the second hole is located at the central axis of the main body section and near the distal end of the main body section.

Further, the included angle is 8-20 degrees.

Furthermore, an insulating sleeve is sleeved outside the temperature measuring point.

Furthermore, an extension section is arranged at the proximal end of the main body section, and the first hole is formed along the axial direction of the extension section.

Furthermore, a boss section is arranged at the end part of the extension section and is arranged at one end, far away from the main body section, of the extension section; the boss section is provided with a groove used for penetrating the thermocouple.

Further, the top section of the second hole is arranged corresponding to the section of the groove.

Further, the insulator is UV glue, and the insulator can be filled between the thermocouple and the second hole.

Furthermore, the pull wire and the lead are fixed in the first hole through soldering tin.

Another object of the present invention is to provide a catheter, wherein the catheter is connected to the ablation electrode by hot melting.

The utility model has the advantages that:

the lead and the thermocouple are respectively arranged in the first hole and the second hole which are not communicated with each other, and meanwhile, the radio frequency current of the thermocouple and the lead is mutually insulated by utilizing the insulating layer arranged on the outer wall of the thermocouple, so that the stability and the accuracy in temperature measurement are improved; in addition, an insulator is arranged between the thermocouple and the second hole, so that the interference of a thermocouple signal and the radio frequency current of the ablation electrode can be further reduced, and the temperature measurement result is more stable and accurate.

Drawings

FIG. 1 is a cross-sectional view of the ablation electrode of the present invention shown unassembled;

FIG. 2 is a right side view of the ablation electrode of the present invention shown unassembled;

FIG. 3 is a cross-sectional view of an ablation electrode;

FIG. 4 is a cross-sectional view of the catheter and ablation electrode as mated;

fig. 5 is a schematic view of the structure of the thermocouple.

The reference numbers in the figures illustrate: 10. a main body section; 20. a second hole; 21. a thermocouple; 211. a temperature measuring line; 212. measuring temperature points; 22. an insulating sleeve; 23. an insulator; 30. a first hole; 31. a wire; 32. a pull wire; 33. soldering tin; 40. a boss section; 41. a groove; 50. an extension section; 60. a conduit; 61. a distal end of the catheter.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Example one

Referring to fig. 1 and 3, an embodiment of the ablation electrode of the present invention includes a main body section 10, a pull wire 32, a lead wire 31, and a thermocouple 21, wherein the pull wire 32, the lead wire 31, and the thermocouple 21 are disposed in the main body section 10. The main body section 10 comprises a proximal end, which is the end that is closer to the operator when in use, and a distal end, which is the end that is further from the operator. The body section 10 is cylindrically disposed and rounded at its distal end.

Referring to fig. 1, the body section 10 defines a first bore 30 and a second bore 20, each of the first bore 30 and the second bore 20 being defined at a proximal end of the body section 10. The far end of the pull wire 32 and the far end of the lead wire 31 are fixedly arranged in the first hole 30, the thermocouple 21 is fixedly arranged in the second hole 20, the mutual interference between the electric signal of the thermocouple 21 and the radio frequency current of the ablation electrode during temperature measurement is reduced, and the first hole 30 and the second hole 20 are not communicated with each other.

In another embodiment, referring to fig. 1 and 3, the end of the main body segment 10 is provided with an extension 50, in order to facilitate the processing of the ablation electrode, in this embodiment, the extension 50 is integrally formed with the main body segment 10, and the extension 50 is provided as a cylinder, although the shape of the extension 50 is not limited to the cylinder. The first hole 30 is opened along the axial direction of the extension section 50 and extends to the connection between the extension section 50 and the main body section 10. The first hole 30 and the second hole 20 are respectively opened on the extension section 50 and the main body section 10, thereby reducing the interference between the lead 31 fixed in the first hole 30 and the thermocouple 21 fixed in the second hole 20, and improving the stability and accuracy in temperature measurement.

Referring to fig. 1 to 3, the end of the extension section 50 is fixedly provided with a boss section 40, and in this embodiment, the boss section 40 is configured as a cylinder, but not limited to a cylinder. The outer diameter of the extension section 50 is smaller than that of the main body section 10, the outer diameter of the boss section 40 is larger than that of the extension section 50, meanwhile, the boss section 40 is provided with a groove 41 along the axial direction, the end part of the thermocouple 21 is fixed in the second hole 20, and the other end of the thermocouple 21 penetrates through the groove 41 to be connected with other equipment. In order to reduce the bending of the thermocouple 21 during use, the cross section of the top of the second hole 20 is arranged to correspond to the cross section of the recess 41.

Referring to fig. 1, the pull wire 32 and the lead wire 31 are fixedly arranged in the first hole 30, the thermocouple 21 is fixedly arranged in the second hole 20, and the lead wire 31, the pull wire 32 and the thermocouple 21 are uniformly distributed in the ablation electrode by using the first hole 30 and the second hole 20, so that different requirements of radio frequency discharge, bend control, temperature measurement and the like can be met. The lead wire 32 and the lead wire 31 are fixed inside the first hole 30 by soldering, and the gaps between the lead wire 31 and the lead wire 32 and the first hole 30 are filled with the solder 33 and are protruded over the end surface of the boss step 40, whereby the stability of fixing the lead wire 31 and the lead wire 32 can be increased.

In another embodiment, referring to fig. 1, the second hole 20 opens from the end of the main body segment 10, and the axis of the second hole 20 is arranged obliquely with respect to the axis of the main body segment 10, i.e. the axis of the second hole 20 and the axis of the main body segment 10 form an included angle. At the proximal end of the body segment 10, the included angle is an acute angle, and in this embodiment, the included angle is 8 ° to 20 ° depending on the size of the body segment 10, the extension segment 50, and the boss segment 40.

Referring to fig. 3, the thermocouple 21 includes a temperature measuring line 211 and a temperature measuring point 212 located at an end of the temperature measuring line 211. According to the working principle of the thermocouple 21: the conductor of two kinds of different compositions (correspond the utility model discloses the temperature measurement line 211) both ends joint into the return circuit, and wherein one end is as the temperature measurement end (corresponding the utility model discloses temperature measurement point 212), and the other end is as the reference end (the utility model discloses thermocouple 21 can external device to as the reference end), when the temperature of two junctions is different, will produce the electromotive force in the return circuit, this kind of phenomenon is called thermoelectric effect, and this kind of electromotive force is called thermoelectric potential. The thermocouple 21 measures the temperature by using this principle. In order to ensure reliable and stable operation of the thermocouple 21, the welding of the two hot electrodes that make up the thermocouple 21 must be secure; the two thermodes (corresponding to the temperature measuring line 211) should be well insulated from each other to prevent short circuit.

The thermocouple 21 of this example was prepared as follows:

a) the temperature measuring line 211 is a raw material purchased from the outside, the temperature measuring line 211 is two leads 31 which are respectively made of pure copper and copper-nickel materials, and the manufacturer coats the surfaces of the two leads with insulating layers to ensure that the two leads 31 are mutually insulated;

b) soldering tin 33 at one end of the temperature measuring line 211 to enable the temperature measuring line to be jointed to form a temperature measuring point 212, and connecting the other end of the temperature measuring line with equipment;

c) the thermocouple 21 passes through the recess 41 to the bottom of the second hole 20.

Referring to fig. 1 and 3, the bottom of the obliquely arranged second hole 20 is located at the central axis of the main body segment 10, and the end of the second hole 20 is arranged near the distal end of the main body segment 10. The inclined opening of the second hole 20 and the bottom of the second hole 20 being located at a position close to the center line of the distal end enable the thermocouple 21 placed inside the second hole 20 to be closer to the end of the ablation electrode, thereby making the measurement result more accurate.

Referring to fig. 3, the outer wall of the temperature measuring wire 211 is coated with an insulating layer (not shown in the figure), so that the thermocouple 21 and the conducting wire 31 are insulated from each other, and the mutual interference between the electric signal of the thermocouple 21 and the radio frequency current of the ablation electrode is reduced. In addition, the insulating sleeve 22 is sleeved outside the temperature measuring point 212, and the insulating sleeve 22 can further improve the insulating effect of the thermocouple 21 and the lead 31 so as to improve the stability and accuracy of temperature measurement.

Referring to fig. 3, an insulator 23 is disposed between the thermocouple 21 and the second hole 20, and the insulator 23 is preferably UV paste. The insulator 23 can insulate the thermocouple 21 and the lead wire 31 from each other while the thermocouple 21 is fixedly connected to the recess 41, the extension 50, the second hole 20 and the insulating sleeve 22 through the insulator 23.

Example two

A catheter, referring to fig. 3 and 4, a catheter 60 can be used with the ablation electrode described above, in this embodiment the distal end 61 of the catheter is attached to the ablation electrode by means of a heat-staking process. After the distal end 61 of the catheter is subjected to the heat melting process, the melted catheter 60 wraps the boss section 40 and the extension section 50, and can protect the thermocouple 21 inserted into the main body section 10. Since the thermocouple 21 is extremely prone to wear at the ablation electrode, the catheter 60 and the ablation electrode are connected by means of heat fusion, and displacement and wear of the thermocouple 21 during use can be reduced.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. An ablation electrode comprising a body section, a pull wire, a lead wire, and a thermocouple, the body section comprising a proximal end and a distal end; the main body section is provided with a first hole and a second hole at the proximal end, and the first hole and the second hole are not communicated with each other;

the end part of the stay wire and the end part of the lead are fixed in the first hole;

the end part of the thermocouple is fixed in the second hole, and the thermocouple comprises a temperature measuring line and a temperature measuring point positioned at the end part of the temperature measuring line; an insulator is arranged between the thermocouple and the second hole, and an insulating layer is arranged on the outer wall of the temperature measuring wire to insulate the thermocouple and the wire.

2. The ablation electrode of claim 1, wherein an axis of the second bore forms an included angle with an axis of the body segment, and the included angle is acute at the proximal end; the bottom of the second hole is located at the central axis of the main body section and near the distal end of the main body section.

3. The ablation electrode of claim 2, wherein the included angle is between 8 ° and 20 °.

4. The ablation electrode of claim 1, wherein an insulating sleeve is sleeved over the temperature measurement point.

5. The ablation electrode of claim 2 wherein said body section is provided with an extension at a proximal end thereof, said first hole opening along a centerline of said extension.

6. The ablation electrode of claim 5, wherein the end of the elongated section is provided with a boss section disposed at an end of the elongated section distal from the main body section; the boss section is provided with a groove used for penetrating the thermocouple.

7. The ablation electrode of claim 6, wherein a top cross-section of the second hole corresponds to a cross-section of the groove.

8. The ablation electrode of claim 1, wherein the insulator is a UV glue, the insulator capable of filling between the thermocouple and the second hole.

9. The ablation electrode of claim 1, wherein the pull wire and the lead wire are secured within the first hole by solder.

10. A catheter incorporating an ablation electrode according to any of claims 1 to 9, wherein the catheter is connected to the ablation electrode by heat staking.