CN113813043A - Electrode structure and medical catheter - Google Patents
Electrode structure and medical catheter Download PDFInfo
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- CN113813043A CN113813043A CN202010568773.5A CN202010568773A CN113813043A CN 113813043 A CN113813043 A CN 113813043A CN 202010568773 A CN202010568773 A CN 202010568773A CN 113813043 A CN113813043 A CN 113813043A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00839—Bioelectrical parameters, e.g. ECG, EEG
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00964—Features of probes
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Abstract
The invention provides an electrode structure and a medical catheter, comprising: a head electrode, a micro-electrode, a temperature sensor, and an insulator; the temperature sensor is connected with the microelectrode and used for sensing the temperature of the microelectrode; the insulation piece is fixed on the head electrode, the temperature sensor and the microelectrode are fixed on one side of the insulation piece, which is far away from the head electrode, and the insulation piece is separated from the head electrode. So design, alright avoid temperature sensor reaches the microelectrode with head electrode direct contact so can guarantee the insulating nature between head electrode and the microelectrode for the signal of telecommunication of microelectrode is not disturbed by head electrode's current signal, simultaneously, also can play fine thermal-insulated effect, guarantees that temperature sensor can not receive cold salt water influence.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an electrode structure and a medical catheter.
Background
In recent years, interventional therapy has been available using catheter systems for conditions such as cardiac arrhythmias, refractory hypertension, etc. For example, in the treatment of atrial fibrillation in arrhythmia, an ablation or mapping catheter is passed through a vein or artery into the heart, the heart is mapped, the abnormal electrical signal location or pathway is found, and then energy is applied to ablate, thereby impedance heating the tissue to create a non-conductive lesion in the tissue, resulting in a therapeutic effect. If the refractory hypertension is treated by renal artery ablation, the ablation catheter enters the connecting artery between the abdominal aorta and the kidney from the artery, and the parasympathetic nerve pathway is blocked by ablation, so that the function of reducing the blood pressure is achieved.
In order to obtain clear intracardiac signals, a plurality of metal microelectrodes can be arranged on the outer surface of the head electrode. Meanwhile, in order to ensure the safety in the process of the ablation operation and avoid the occurrence of adverse events such as ground scorching and solidification caused by tissue overheating, even steam explosion and the like, a temperature sensor can be arranged for monitoring the actual temperature of the tissue. However, in practical application, it is found that there are problems that the electric signal of the micro-electrode is easily disturbed, and the temperature accuracy measured by the temperature sensor is easily affected.
Disclosure of Invention
It is an object of the present invention to provide a medical catheter to address one or more of the problems of the prior art.
The inventor researches and discovers that the reason that the electric signal of the microelectrode is easily interfered is related to the connection mode of the microelectrode and the head electrode, in the conventional operation, the microelectrode is arranged on the outer surface of the head electrode in a gluing mode, the insulation performance of the microelectrode and the head electrode is guaranteed only through the thickness of a glue layer, and although the microelectrode and the head electrode are insulated, the electric signal of the microelectrode can be interfered by the current generated by the head electrode in the ablation process; on the other hand, a temperature sensor for sensing temperature is arranged inside the head electrode, and the flushing of cold saline inside the head electrode also influences the accuracy of the temperature measured by the temperature sensor.
In view of the above, to solve the above problems, the present invention provides an electrode structure, including: a head electrode, a micro-electrode, a temperature sensor, and an insulator; the temperature sensor is connected with the microelectrode and used for sensing the temperature of the microelectrode; the insulating part is fixed on the head electrode, and the temperature sensor and the microelectrode are fixed on one side of the insulating part, which is far away from the head electrode.
Optionally, in the electrode structure, the insulating member has an accommodating cavity, a distal end of the accommodating cavity is open, the microelectrode and the temperature sensor are disposed in the accommodating cavity, and the distal end of the microelectrode is flush with or extends out of the distal end of the head electrode.
Optionally, the electrode structure in, the insulating part includes first insulator, first insulator is hollow structure, the microelectrode with temperature sensor locates in the first insulator, the microelectrode with temperature sensor laminates mutually, the distal end of microelectrode with the distal end parallel and level of first insulator or stretch out first insulator, the head electrode with first insulator passes through the glue layer and fixes mutually.
Optionally, in the electrode structure, the insulator further includes a second insulator disposed between the head electrode and the first insulator and closing at least a proximal end of the first insulator.
Optionally, in the electrode structure, the second insulator is in a sheet shape, and an outer contour of the second insulator matches an outer contour of the first insulator, or the second insulator is in a cap shape, and an inner contour of the second insulator matches an outer contour of the first insulator.
Optionally, in the electrode structure, the first insulator, the second insulator and the head electrode are connected to each other by bonding.
Optionally, in the electrode structure, the surfaces of the first insulator and the second insulator for adhesion each have a rough structure formed by roughening treatment.
Optionally, in the electrode structure, a side wall of the first insulator has a notch or a through hole for a lead of the micro-electrode to pass through.
Optionally, in the electrode structure, the first insulator has a counter bore arranged along a circumferential direction, and the micro electrode has a convex ring engaged with the counter bore.
Optionally, in the electrode structure, the proximal end of the microelectrode is provided with a groove arranged along the axial direction, and the temperature sensor is at least partially embedded in the groove.
The present invention also provides a medical catheter comprising: the electrode structure comprises a tube body and the electrode structure, wherein the head electrode of the electrode structure is arranged at the far end of the tube body.
The electrode structure and the medical catheter provided by the invention comprise: a head electrode, a micro-electrode, a temperature sensor, and an insulator; the temperature sensor is connected with the microelectrode and used for sensing the temperature of the microelectrode; the insulation piece is fixed on the head electrode, the temperature sensor and the microelectrode are fixed on one side of the insulation piece, which is far away from the head electrode, and the insulation piece is separated from the head electrode. So design, alright avoid temperature sensor reaches the microelectrode with head electrode direct contact so can guarantee the insulating nature between head electrode and the microelectrode for the signal of telecommunication of microelectrode is not disturbed by head electrode's current signal, simultaneously, also can play fine thermal-insulated effect, guarantees that temperature sensor can not receive cold salt water influence.
Drawings
FIG. 1 is a schematic view of a medical catheter provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electrode structure provided in an embodiment of the invention;
FIG. 3 is a cross-sectional view of the electrode structure of FIG. 1, taken along section line C-C;
FIG. 4 is a graph of the yield of the DC insulation resistance of the conduit in an embodiment of the present invention;
wherein the reference numerals are as follows:
1-an electrode structure; 11-a head electrode; 12-a microelectrode; 121-convex ring; 13-a temperature sensor; 14-an insulator; 100-a containing cavity; 14-an insulator; 141-a first insulator; 142-a second insulator; 200-notches/through holes; 300-a counter bore surface; 400-groove; 2-a pipe body; 21-pressure sensor.
Detailed Description
The electrode structure and the medical catheter proposed by the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used herein, the term "proximal" is generally the end near the operator, the term "distal" is generally the end near the lesion of the patient, and "end" and "other end" and "proximal" and "distal" are generally intended to refer to the corresponding two parts, including not only the end points, unless the context clearly indicates otherwise.
As described above, the inventor finds that in the conventional operation, the microelectrode is arranged in the groove on the outer surface of the head electrode in a gluing way, the insulation performance is ensured only by the thickness of a glue layer, and the electric current generated in the ablation process is easy to interfere with the electric signal of the microelectrode; on the other hand, the flushing of cold saline inside the head electrode also affects the accuracy of the temperature measured by the temperature sensor.
In view of the above, referring to fig. 1 in combination with fig. 2 and 3, a preferred embodiment of the present invention provides an electrode structure 1, where the electrode structure 1 includes: a head electrode 11, a micro-electrode 12, a temperature sensor 13, and an insulator 14; the insulating part 14 is fixed on the head electrode 11, the micro-electrode 12 is attached to the temperature sensor 13, and is disposed on a side of the insulating part 14 away from the head electrode 11, that is, a side of the insulating part 14 not connected to the head electrode 11.
With such a design, the temperature sensor 13 and the head electrode 11, and the micro-electrode 12 and the head electrode 11 are isolated by the insulating member 14, so that the electric signal of the micro-electrode 12 is not interfered by the current signal of the head electrode 11, and meanwhile, the temperature sensor 13 is not influenced by cold saline.
In the preferred embodiment, the head electrode 11 can be an ablation electrode, which is in contact with the vessel wall or tissue and can apply energy for ablation. However, the present application does not limit that the head electrode 11 may be configured as an ablation electrode only, and may be configured as other electrodes, such as a mapping electrode.
The microelectrode 12 is disposed on the head electrode 11 through the insulating member 14, for example, disposed in a corresponding groove on the head electrode 11, and plays a role of detecting an electrocardiographic signal, and generally, the microelectrode 12 is made of a metal material, for example, platinum-iridium alloy or stainless steel. The temperature sensor 13 is attached to the microelectrode 12 for monitoring the actual temperature of the human tissue, wherein the temperature sensor 13 may be a conventional thermocouple.
In order to facilitate the arrangement of the microelectrode 12 and the temperature sensor 13, preferably, the insulating member 14 has an accommodating cavity, a distal end of the accommodating cavity is open, the microelectrode 12 and the temperature sensor 13 are arranged in the accommodating cavity 100, and the distal end of the microelectrode 12 is flush with the distal end of the accommodating cavity 100 or extends out of the accommodating cavity 100, so that the microelectrode 12 can contact with a human tissue to obtain an electrocardiographic signal. Here, the distal end of micro-electrode 12 refers to the end of micro-electrode 12 away from the centerline of the head electrode, and the distal end of receiving chamber 100 refers to the end of receiving chamber 100 away from the centerline of the head electrode.
Referring to fig. 1, in an embodiment, the insulating member 14 includes a first insulator 141, the first insulator 141 is a hollow structure, that is, a proximal end and a distal end of the first insulator 141 are both open, the micro-electrode 12 and the temperature sensor 13 are disposed in the first insulator 141, the distal end of the micro-electrode 12 is flush with or extends out of the first insulator 141, and the distal end of the first insulator 141 is an end of the first insulator 141 away from a center line of the head electrode. Preferably, the head electrode 11 and the first insulator 141 are connected by a glue layer. The first insulator 141 may be made of polyimide or other polymer material having excellent insulating properties. In addition, a recess or through hole 200 may be formed on a sidewall of the first insulator 141 for a wire of the micro-electrode 12 to pass through.
Since a glue layer is disposed between the head electrode and the first insulator 141, the glue layer may have a sufficient thickness to perform an isolation and insulation function during actual operation, and thus, the temperature sensor 13 and the head electrode 11, and the micro-electrode 12 and the head electrode 11 may be completely isolated.
Further, the head electrode 11 may be provided with a groove, and the first insulator 141 may be at least partially embedded in the groove. At this time, the surface of the head electrode for contact with the first insulator 141 includes at least the bottom wall of the groove.
In another embodiment, the insulating member 14 further includes a second insulator 142, and the material of the second insulator 141 may be polyimide or other polymer material with excellent insulating property. The second insulator 142 is disposed between the head electrode 11 and the first insulator 141, and covers at least a proximal end of the first insulator 141, that is, an end of the first insulator 141 close to a center line of the head electrode. That is, compared to the previous embodiment, since the proximal end of the first insulator 141 and the head electrode 11 are isolated by the second insulator 142, there is no specific requirement for the thickness of the glue layer, the glue layer only needs to be able to fix the proximal end, and the effect of isolating the electrical signal is more significant when the second insulator 142 is used for isolation relative to the isolation of the glue layer.
When assembling, the temperature sensor 13 and the micro-electrode 12 may be placed into the receiving cavity from a proximal end of the first insulator 141, wherein the micro-electrode 12 may be fixed to the first insulator 141 in a sleeved manner, specifically, the first insulator 141 has a counter bore arranged along a circumferential direction, the micro-electrode 12 has a convex ring 121, and a distal end of the micro-electrode 12 passes through a distal end of the first insulator 141 and is embedded into the counter bore, so that the convex ring 121 is engaged with the counter bore, thereby defining a position of the micro-electrode 12 in the first insulator 141.
Since the material of the first insulator 141 may be polyimide, the micro-electrode 12 and the first insulator 141 may also be connected by injection molding, and the injection molding process is known to those skilled in the art and will not be described herein.
The temperature sensor 13 can be fixed on the microelectrode 12 in a clamping manner or a direct placing manner, specifically, the proximal end of the microelectrode 12 is provided with a groove 400 arranged along the axial direction, and the temperature sensor 13 is at least partially embedded in the groove 400. Further, the second insulator 142 may be designed to abut against the temperature sensor 13 when fixed to the first insulator 141, thereby defining the relative positions of the temperature sensor 13, the head electrode 11, and the second insulator 142.
In addition to the counter bore, in other embodiments, at least two support portions may be provided in the first insulator 141, and all the support portions are uniformly arranged in the accommodating cavity 100 along the circumferential direction of the first insulator 141, so as to have the same support function as the counter bore. Similarly, microelectrode 12 may also be of a non-convex design, for example comprising at least two projections, which are arranged uniformly in the circumferential direction of the microelectrode. This application cup joint microelectrode 12 in first insulator 141's form does not do specific restriction, only needs to guarantee, microelectrode 12 cup joint in behind first insulator 141, microelectrode 12 can be fixed in among the insulating part 14, just microelectrode 12's distal end can contact human tissue.
The second insulator 142 may be in a shape of a sheet, and an outer contour of the second insulator 142 matches an outer contour of the first insulator 141. When assembled, the second insulator 142 may be bonded to the proximal end of the first insulator 141 by epoxy glue. In order to improve the stability of the connection between the two, a fixing portion may be further provided, which is disposed along the axial direction of the first insulator 141 and protrudes from the first insulator 141 for engaging with the second insulator 142. The fixing portion may be integrally formed with the first insulator 141, or may be separately fixed to the first insulator 141.
The second insulator 142 may also be in a cap shape, and an inner contour thereof matches an outer contour of the first insulator 141, and is fixed to the first insulator 141 in a manner of being covered. Likewise, the two may be secured to each other by adhesive means.
In other embodiments, the insulation member 14 may also be formed by integrally molding the first insulation member 141 and the second insulation member 142, that is, the insulation member 14 has a receiving structure with a distal end being open and a proximal end being closed, and accordingly, the micro-electrode 12 and the temperature sensor 13 may also be fixed by other methods, such as bonding or welding. Other shapes or configurations of the insulating member 14 capable of isolating the head electrode 11 and the temperature sensor 13 and the micro-electrode 12 are within the scope of the present application.
In this embodiment, the second insulator 142 and the head electrode 11, the first insulator 141 and the head electrode 11, and the first insulator 141 and the second insulator 142 are preferably fixed to each other by adhesion, and may further perform an insulating function. In addition, it is further preferable that the surfaces of the first insulator 141 and the second insulator 142 for bonding have a rough structure. The concave-convex structure can be formed by mechanical treatment such as grinding or other chemical treatment, so that the bonding strength is improved, the purpose of improving the connection stability of the head electrode 11 and the insulating part 14 is achieved, and the isolation effect of the head electrode 11 and the temperature sensor 13/the microelectrode 12 is better.
Referring to fig. 1, the electrode structure 1 provided in this embodiment may include a plurality of the insulating members 14, the insulating members 14 are uniformly arranged along the circumferential direction of the head electrode 11, and the micro-electrodes 12, the temperature sensors 13 and the insulating members 14 are arranged in a one-to-one correspondence manner. The arrangement of a plurality of said microelectrodes 12 and a plurality of said temperature sensors 13 is advantageous for improving the detection accuracy.
In addition, with reference to fig. 1, an embodiment of the present invention further provides a medical catheter, where the medical catheter includes a catheter body 2 and the electrode structure 1, and the tip electrode 11 of the electrode structure 1 is disposed at a distal end of the catheter body 2.
Specifically, the head electrode 11 can be disposed at the distal end of the tube body 2 through the supporting seat of the head electrode 11, the supporting seat includes a first portion and a second portion, the first portion is disposed on the head electrode 11 in a sleeved manner, and the second portion is disposed on the tube body 2 in a sleeved manner, so that the head electrode 11 is disposed at the distal end of the tube body 2. The tube body 2, the support seat and the head electrode 11 are communicated so as to lead a lead and a saline guide tube to penetrate through.
The body 2 can be the elastomer, can set up pressure sensor 21 on the body 2, works as when head electrode 11 contacts with vascular wall or tissue surface, head electrode 11 receives the effect of contact force, makes the elastomer produces deformation, and is corresponding, locates pressure sensor 21's on the elastomer signal of telecommunication changes to transmit this signal of telecommunication for outside control end, so that this control end calculates the size and the direction of contact force according to the change of received signal of telecommunication, and then is used for judging when medical catheter melts human tissue, the depth of the ablation kitchen that forms.
In use, the medical catheter will be passed through the puncture sheath, through the inferior vena cava, and into the left atrium to perform ablation. Hereinafter, the head electrode 11 is exemplified as being configured as an ablation electrode, and those skilled in the art should be able to modify the above description, and apply the description to other types of electrodes and fields other than the field, such as esophageal ablation, with appropriate modifications in detail, and thus are not limited to ablation or mapping catheters.
In order to simulate the blood and blood pressure environment in the actual ablation operation process and the influence of factors such as sheath passing, bending, twisting and ablation discharging on the insulation performance of the catheter, the following tests are respectively carried out on each test sample:
(1) initial insulation, testing the initial insulation performance of the sample;
(2) sealing and insulating properties, namely injecting 0.9% physiological saline into a sealing tank, putting a test sample into the saline, applying a certain air pressure, preferably 0.3Mpa, maintaining the pressure for more than 15 hours, and then testing the direct-current insulation resistance;
(3) insulating after sheath fatigue, placing the sheath tube in 0.9% normal saline, maintaining the temperature of the saline at about 37 ℃, and repeatedly passing the sheath for 100 times by the catheter for testing;
(4) insulating after bending, placing a bending fatigue die in physiological saline with the concentration of 0.9%, penetrating the head end of a conduit of a test sample from one end of the die to the other end of the die, then rotating the conduit for 180 degrees for repeated operation, and performing the test after repeating the operation for 200 times;
(5) after resisting torque, insulating, fixing the head electrode 11 in a torque tester, rotating 90 degrees clockwise and anticlockwise respectively, and then testing the insulating property;
(6) after the service life, the insulation is realized, the temperature of 0.9 percent of normal saline is maintained at about 37 ℃, and the saline impedance is about 120 omega; the catheter was placed in the saline water, the power was set at 60W, the discharge time was 120s, and the discharge was repeated 125 times, and then the insulating property was measured.
Test samples tested as above included:
sample 1: the catheter sample is an ablation catheter comprising the first insulator 141 and the second insulator 142 provided in the preferred embodiment;
sample 2: the first insulator 141 and the second insulator 142 are not contained in the catheter sample, and other structures are consistent with the preferred embodiment;
sample 3: the catheter sample does not include the second insulator 142, and the other structures are consistent with the preferred embodiment.
Referring to fig. 4, fig. 4 is a line graph which passes the insulation test of samples 1, 2 and 3 and is plotted according to the yield of the linear insulation resistance between the head electrode 11 and the temperature sensor 13, and shows that the insulation performance of the sample 1 including the first insulator 141 and the second insulator 142 at the temperature sensor 13 is significantly improved.
In summary, the electrode structure and the medical catheter provided by the present invention include:
a head electrode, a micro-electrode, a temperature sensor, and an insulator; the temperature sensor is connected with the microelectrode and used for sensing the temperature of the microelectrode; the insulating part is fixed on the head electrode, and the temperature sensor and the microelectrode are fixed on one side of the insulating part, which is far away from the head electrode. By the design, the temperature sensor and the microelectrode are prevented from being in direct contact with the head electrode, so that the insulativity between the head electrode and the microelectrode can be ensured, the electric signal of the microelectrode is not interfered by the current signal of the head electrode, meanwhile, a good heat insulation effect can be achieved, the temperature sensor is prevented from being influenced by cold brine, and the problems that the electric signal of the microelectrode is easily interfered, the temperature precision measured by the temperature sensor is easily influenced and the like are solved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (11)
1. An electrode structure, comprising: a head electrode, a micro-electrode, a temperature sensor, and an insulator; the temperature sensor is connected with the microelectrode and used for sensing the temperature of the microelectrode; the insulating part is fixed on the head electrode, and the temperature sensor and the microelectrode are fixed on one side of the insulating part, which is far away from the head electrode.
2. The electrode structure of claim 1, wherein the insulator has a receiving cavity with a distal end open, the microelectrode and the temperature sensor are disposed in the receiving cavity, and the distal end of the microelectrode is flush with or extends out of the receiving cavity.
3. The electrode structure of claim 2, wherein the insulator comprises a first insulator, the first insulator is a hollow structure, the microelectrode and the temperature sensor are arranged in the first insulator, the microelectrode and the temperature sensor are attached to each other, the distal end of the microelectrode is flush with or extends out of the first insulator, and the head electrode and the first insulator are fixed through a glue layer.
4. The electrode structure of claim 3, wherein the insulator further comprises a second insulator disposed between the tip electrode and the first insulator and closing at least a proximal end of the first insulator.
5. The electrode structure of claim 4, wherein the second insulator is in the form of a sheet having an outer profile matching an outer profile of the first insulator, or in the form of a cap having an inner profile matching an outer profile of the first insulator.
6. The electrode structure of claim 4 wherein said first insulator, said second insulator and said head electrode are adhesively connected between each other.
7. The electrode structure according to claim 6, wherein the surfaces for bonding of the first insulator and the second insulator each have a textured structure formed by roughening treatment.
8. The electrode structure of claim 3, wherein the sidewall of the first insulator has a notch or a through hole for a wire of the micro-electrode to pass through.
9. The electrode structure of claim 3, wherein the first insulator has a circumferentially disposed counterbore, and the microelectrode has a raised ring that snaps into the counterbore.
10. The electrode structure of claim 1, wherein the proximal end of the microelectrode has an axially disposed recess, and the temperature sensor is at least partially embedded in the recess.
11. A medical catheter, comprising: a tube and an electrode structure as claimed in any one of claims 1 to 10, the tip electrode of the electrode structure being disposed at a distal end of the tube.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010568773.5A CN113813043A (en) | 2020-06-19 | 2020-06-19 | Electrode structure and medical catheter |
| PCT/CN2021/100329 WO2021254382A1 (en) | 2020-06-19 | 2021-06-16 | Electrode structure and medical catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010568773.5A CN113813043A (en) | 2020-06-19 | 2020-06-19 | Electrode structure and medical catheter |
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| Publication Number | Publication Date |
|---|---|
| CN113813043A true CN113813043A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010568773.5A Pending CN113813043A (en) | 2020-06-19 | 2020-06-19 | Electrode structure and medical catheter |
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| CN (1) | CN113813043A (en) |
| WO (1) | WO2021254382A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115153811A (en) * | 2022-09-07 | 2022-10-11 | 杭州德诺电生理医疗科技有限公司 | Ablation catheter and ablation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3000390A1 (en) * | 2007-03-26 | 2016-03-30 | Boston Scientific Limited | High resolution electrophysiology catheter |
| US9724154B2 (en) * | 2014-11-24 | 2017-08-08 | Biosense Webster (Israel) Ltd. | Irrigated ablation catheter with multiple sensors |
| WO2017004093A1 (en) * | 2015-06-29 | 2017-01-05 | Boston Scientific Scimed Inc. | Open-irrigated ablation catheter |
| US11559349B2 (en) * | 2016-09-12 | 2023-01-24 | Biosense Webster (Israel) Ltd. | Ablation catheter with a flexible printed circuit board |
| CN212261511U (en) * | 2020-06-19 | 2021-01-01 | 上海微创电生理医疗科技股份有限公司 | Electrode structure and medical catheter |
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2020
- 2020-06-19 CN CN202010568773.5A patent/CN113813043A/en active Pending
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2021
- 2021-06-16 WO PCT/CN2021/100329 patent/WO2021254382A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115153811A (en) * | 2022-09-07 | 2022-10-11 | 杭州德诺电生理医疗科技有限公司 | Ablation catheter and ablation system |
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| Publication number | Publication date |
|---|---|
| WO2021254382A1 (en) | 2021-12-23 |
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