CN211883782U - Electrophysiology catheter for mapping coronary sinus - Google Patents

Abstract

The application provides an electrophysiology pipe for mapping coronary sinus, electrophysiology pipe include the body, install in the end electrode on body distal end top, cover and establish on the body distal end and rather than the ring electrode of closely cooperating, set up the connector at the body proximal end, safety line, second wire and first wire have still been arranged to the inner chamber of body, the distal end of safety line and second wire fix on the end electrode, the proximal end of safety line fix the proximal end at the body, the proximal end and the connector electricity of second wire be connected, the distal end of first wire fix on the ring electrode, the proximal end and the connector electricity of first wire be connected, the body be "J" type, the body include flat near section, near section to the middle section of one side bending, to the distal section of further buckling of the curved shape medial entry side in middle section. The J-shaped catheter is matched with the coronary sinus structure, so that the coronary sinus can be easily entered and is not easy to slip.

Description

Electrophysiology catheter for mapping coronary sinus

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a diagnosis electrophysiology catheter specially used for mapping coronary sinus.

Background

An electrophysiology catheter for diagnosis (hereinafter referred to as electrophysiology catheter) is used for recording electrocardiosignals of each part in the heart, electrically stimulates the heart and is a key product for electrophysiology mapping of heart diseases. The method comprises the steps of firstly puncturing femoral vein vessels or internal jugular vein vessels, sending the far end of a catheter to different positions in a heart cavity along the blood vessel cavity under X-ray fluoroscopy, electrically communicating an electrode at the far end of the catheter with a connector at the near end of the catheter, transmitting an electrocardiosignal extracted by the electrode to an external multi-channel physiological recorder through the connector, and carrying out electrophysiological examination on the heart by a doctor through an electrocardiogram displayed by the multi-channel physiological recorder, inducing and diagnosing various arrhythmia, determining origin focuses of the arrhythmia and providing necessary basis for radio frequency ablation treatment. The examination and treatment method not only avoids the chest pain of the patient, but also can treat arrhythmia, rarely causes serious complications, and is widely applied in clinic at home and abroad.

Over the past 30 years, as clinical cardiac electrophysiology has progressed from "research" to "treatment" of arrhythmias, diagnostic electrophysiology catheters of various morphologies and functions have been developed for some specific diagnostic purposes or for specific anatomical regions of the heart. For example: the number of electrodes is from 2 poles to 24 poles, the conduits with different electrode spacing or group spacing, and the conduits with different distal end bending or bending degree.

With the development of electrophysiological examination and radio frequency ablation in the heart, physicians have long recognized that the Coronary Sinus (CS) is closely related to various arrhythmias, mainly to the unique anatomical location and histological structure of the coronary sinus. The coronary sinus, which is a part of the myocardial blood circulation, has the primary function of collecting venous blood from the myocardium and draining it back into the right atrium, which is located in the back of the heart between the left and right atria, opening into the right atrium via the coronary sinus ostium.

Due to the structural particularity of the coronary sinus, the conventional electrophysiology catheter cannot be smoothly placed into the coronary sinus for electrophysiology mapping, so that an electrophysiology diagnostic catheter specially used for mapping the coronary sinus is urgently needed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present application is to provide an electrophysiology catheter for mapping the coronary sinus.

In order to solve the above technical problems, the present application provides an electrophysiology catheter for mapping coronary sinus, the electrophysiology catheter comprises a catheter body, a terminal electrode installed at the top end of the distal end of the catheter body, a ring electrode sleeved on the distal end of the catheter body and tightly matched with the catheter body, a connector arranged at the proximal end of the catheter body, a safety wire, a second wire and a first wire arranged in the inner cavity of the catheter body,

the far ends of the safety wire and the second lead wire are fixed on the end electrode, the near end of the safety wire is fixed at the near end of the tube body, the near end of the second lead wire is electrically connected with the connector, the far end of the first lead wire is fixed on the ring electrode, the near end of the first lead wire is electrically connected with the connector,

the pipe body is J-shaped, and the pipe body comprises a straight near section, a middle section which is bent towards one side relative to the near section, and a far section which is further bent towards the inner side of the bent shape of the middle section.

Preferably, the proximal section of the tubular body has a material hardness greater than the material hardness of the intermediate and distal sections.

Preferably, the density of the distal section of the tubular body is greater than the density of the middle section.

Preferably, the inner cavity of the distal section of the tube body is filled with a blocking block.

Preferably, the blocking block is a molten material filled in the inner cavity of the far section of the pipe body after the pipe body is heated and melted.

Preferably, the blocking block is formed by curing glue filled in the inner cavity of the distal section of the tube body.

Preferably, the tube body is provided with a plurality of fine holes for the first conducting wire to pass through, the ring electrode covers outside the fine holes, the proximal end of the first conducting wire passes through the fine holes to be electrically connected with the connector, an extending direction of the fine holes and an axial direction of the tube body form an inclined angle, the fine holes extend from the outside of the tube body to the inside of the tube body and gradually extend towards the proximal end of the tube body, and the inclined angle between the extending direction of the fine holes and the axial direction of the tube body is 30-70 degrees.

Preferably, the ring electrode is embedded into the surface of the tube body by forging, and the surface of the ring electrode is flush with the surface of the tube body.

Preferably, the end electrode include an end cover, connect in the portion of stretching into that is used for imbedding the body distal end of end cover, the near-end surface of the portion of stretching into inwards cave and form an hole, the distal end of second wire and safety line fix the hole in, the lateral wall of the portion of stretching into on be provided with the boss, the boss inlay extremely the inner wall of body on.

The electrophysiology catheter for mapping coronary sinus has the following beneficial effects:

the J-shaped catheter is matched with the coronary sinus structure, so that the coronary sinus can be easily entered and is not easy to slip; the catheter is designed to have integral hardness, the near section is hard, the catheter delivery performance is better, the middle section and the far section are softer, and the injury to blood vessels is less; the high-density proximal segment is less susceptible to blood flow and more susceptible to entering the coronary sinus ostium; the multi-electrode arrangement can extract more coronary sinus electrical signals.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation.

FIG. 1 is a schematic diagram of the structure of the diagnostic electrophysiology catheter of the present invention;

FIG. 2 is a cross-sectional view of the catheter of FIG. 1 at B-B;

FIG. 3 is a distal cross-sectional view of the diagnostic electrophysiology catheter of the present invention;

FIG. 4 is a schematic view of the diagnostic electrophysiology catheter of the present invention positioned near the coronary sinus ostium;

FIG. 5 is a schematic view of the distal end of the diagnostic electrophysiology catheter of the present invention entering the coronary sinus;

FIG. 6 is a schematic view of the diagnostic electrophysiology catheter with the electrodes fully advanced into the coronary sinus;

wherein: 1. a terminal electrode; 2. a ring electrode; 3. a pipe body; 31. a distal segment; 32. a middle section; 33. a proximal segment; 4. a connector; 5. a wire; 6. a security thread; 7. a plugging block; 81. the superior vena cava; 82. the right atrium;coronary sinus ostia 83; 84. the coronary sinus; 85. the left atrium.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, an electrophysiology catheter for diagnosis comprises acatheter body 3, a terminal electrode 1 arranged at the top end of the far end of thecatheter body 3, a plurality ofring electrodes 2 arranged at intervals in sequence, and a connector 4 arranged at the near end of thecatheter body 3, wherein the connector 4 is provided with a plurality of electrical pins, the connector is connected with a multichannel instrument through an extension cable in clinical application, a plurality ofwires 5 are further arranged in the inner cavity of thecatheter body 3, one end of eachwire 5 is connected with the corresponding terminal electrode 1 and thecorresponding ring electrode 2 through a welding process, and the other end of eachwire 5 is welded with the corresponding pin on the connector 4.

The conducting wires are a first conducting wire and a second conducting wire, the far ends of the safety wire and the second conducting wire are fixed on the end electrode, the proximal end of the safety wire is fixed at the proximal end of the tube body, the proximal end of the second lead is electrically connected with the connector, the distal end of the first lead is fixed on the ring electrode, the proximal end of the first lead is electrically connected with the connector, the tube body is provided with a plurality of fine holes for the first lead to pass through, the ring electrode covers the fine holes, the proximal end of the first lead passes through the pore and is electrically connected with the connector, the extending direction of the pore and the axial direction of the tube body have an inclined angle, the fine hole pipe body extends from the outside to the inside of the pipe body gradually to the near end of the pipe body, and the inclination angle between the extending direction of the fine hole and the axial direction of the pipe body is 30-70 degrees. The ring electrode is embedded into the surface of the tube body through forging and pressing, and the surface of the ring electrode is flush with the surface of the tube body. The end electrode include an end cover, connect in the portion of stretching into that is used for imbedding the body distal end of end cover, the near-end surface of the portion of stretching into inwards cave and form an hole, the distal end of second wire and safety line fix the hole in, the lateral wall of the portion of stretching into on be provided with the boss, the boss inlay extremely the inner wall of body on.

In the clinical use process, the catheter is placed in a heart cavity, the end electrode 1 and thering electrode 2 extract respective electrocardiosignals and transmit the electrocardiosignals to the multichannel instrument, the multichannel instrument processes the electrocardiosignals and displays the electrocardiosignals in an electrocardiogram form, and a doctor diagnoses the electrocardiosignals through the electrocardiogram, namely, the intracardiac electrophysiological mapping is performed.

The axis of thetube 3 is in the same plane and is in a "J" shape, that is, includes a proximal section 33 which is approximately linear, amiddle section 32 which is bent to a certain degree relative to the proximal section 33, and adistal section 31 which is further bent inward of the bent shape of the middle section 33.

Referring in detail to fig. 4-6, the coronary sinus is part of the myocardial blood circulation and functions primarily to collect venous blood from the myocardium and drain it back into theright atrium 82, which is located in the back of the heart between theleft atrium 85 and theright atrium 82, opening into theright atrium 82 via thecoronary sinus ostium 83. Because of the importance of the application of thecoronary sinus 84, anatomical studies of thecoronary sinus 84 by many physicians are described in "chinese cardiovascular studies on phase 12,volume 5, 2007, vol.12-applied anatomical studies of the coronary veins and their ostia", which articles indicate typical coronary sinus dimensions as follows:

the utility model discloses an each size of electrophysiology pipe for diagnosis then matches the design according tocoronary sinus 83 structure, and wherein the external diameter ofbody 3 is 5F-8F, andbody 3 length is 50-90cm, andmiddle section 32 is tangent with near section 33, andmiddle section 32 radius is 60-90mm, radian 40-60, and far-end 31 is bent 20-40 to the inboard along the tangent line ofmiddle section 32 and far-end 33 juncture, and far-end 31 length 4-7 mm. The sum of the number of the terminal electrode 1 and the number of thering electrode 2 is between 4 and 20, the width of the terminal electrode 1 and the width of thering electrode 2 are between 1 and 2mm, and the distance between the terminal electrode 1 and thering electrode 2 is between 2 and 5 and 2 … … mm or between 2 and 8 and 2 … … mm. F is a unit of measure, 3F ═ 1 mm.

In one embodiment, the outer diameter of thetubular body 3 is 6F, the length of thetubular body 3 is 65cm, themiddle section 32 is tangent to the proximal section 33, themiddle section 32 has a radius of 75mm and a curvature of 57 degrees, thedistal section 31 is bent inward 25 degrees along the tangent line of the junction point of themiddle section 32 and the distal section 33, and the length of thedistal section 31 is 6 mm. The catheter is a 10-electrode catheter, i.e. comprising one tip electrode 1 and 9ring electrodes 2, the tip electrode 1 andring electrodes 2 having a width of 2mm and a spacing (excluding the width of the electrodes) of 2-8-2 … … mm.

In order to facilitate the catheter to be delivered into the human body, thecatheter body 3 has certain flexibility and can be made of high polymer materials such as PEBAX or TPU, in order to further improve the controllability, thecatheter body 3 is designed to be hard, the hard proximal end 33 has good pushing performance and can facilitate the catheter to be delivered into the heart cavity, and the softmiddle section 32/distal section 31 can avoid the complications such as damage to blood vessels, perforation and the like. Because the blood in theright atrium 82 circulates and flows all the time, the density of thedistal segment 31 is greater than that of themiddle segment 32, which is similar to the effect of a tumbler, so that thedistal segment 31 is not influenced by the flow of the blood, is not easy to drift, and is easier to enter thecoronary sinus orifice 83.

Referring to fig. 3, in order to ensure high density of thedistal section 31, thedistal section 31 is a solid structure, and the inner cavity thereof is filled with the pluggingblock 7. The design can be achieved by a variety of processes. For the first embodiment, after the terminal electrode 1 is welded and fixed with thelead 5 and thesafety wire 6, thelead 5 and thesafety wire 6 are passed through the inner cavity of thetube body 3 until the terminal electrode 1 is close to the end of thetube body 3, the end of thetube body 3 is heated and melted by adopting a thermal welding process, and then the terminal electrode 1 is pushed into the inner cavity of thetube body 3, so that the terminal electrode 1 is fixed with thetube body 3 by adopting the process, and the inner cavity of thetube body 3 is filled with the molten material to form the high-densitydistal section 31. For the second embodiment, glue is filled into the lumen of the end of thetubular body 3, the terminal electrode 1 is then fed into the lumen, and after curing for a certain time, the terminal electrode 1 is bonded to thetubular body 3 to form thedistal segment 31.

Referring to fig. 4-6, a method of implanting the electrophysiology catheter for diagnosis into the coronary sinus of the present invention is described:

in a first step, see FIG. 4, the catheter is accessed via a jugular or subclavian vein puncture through thesuperior vena cava 81 until the electrode segments of the catheter (including thedistal segment 31 and the intermediate segment 32) are delivered adjacent to the coronary sinus ostium.

Because thetube body 3 is of a J-shaped structure, thedistal section 31 is easily aligned with thecoronary sinus orifice 83, and because the density of thedistal section 31 is high, the distal section is not easily influenced by the blood flow in the heart cavity, has small drift and is more stable.

In the second step, as shown in FIG. 5, the catheter is inserted from thecoronary ostium 83, and the catheter is not easily slipped out of thecoronary ostium 83 because thedistal segment 31 and themiddle segment 32 are bent to form the angle A shown in FIG. 5, and thedistal segment 31 and themiddle segment 32 are located in thecoronary sinus 84.

And secondly, as shown in fig. 6, the catheter is continuously fed until all the electrodes (including the end electrode 1 and the ring electrode 3) enter thecoronary sinus 84, so that all the electrodes can obtain the electrocardiosignals thereof to carry out the electrophysiological mapping of the coronary sinus.

It is to be noted that, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.

Claims (9)

1. An electrophysiology catheter for mapping coronary sinus, the electrophysiology catheter comprises a catheter body, a terminal electrode arranged at the top end of the distal end of the catheter body, a ring electrode sleeved on the distal end of the catheter body and tightly matched with the catheter body, a connector arranged at the proximal end of the catheter body, a safety wire, a second lead and a first lead which are arranged in the inner cavity of the catheter body,

the far ends of the safety wire and the second lead wire are fixed on the end electrode, the near end of the safety wire is fixed at the near end of the tube body, the near end of the second lead wire is electrically connected with the connector, the far end of the first lead wire is fixed on the ring electrode, the near end of the first lead wire is electrically connected with the connector,

the pipe body is J-shaped, and the pipe body comprises a straight near section, a middle section which is bent towards one side relative to the near section, and a far section which is further bent towards the inner side of the bent shape of the middle section.

2. The electrophysiology catheter for mapping the coronary sinus of claim 1, wherein the proximal section of the catheter body comprises a material hardness that is greater than the material hardness of the intermediate and distal sections.

3. The electrophysiology catheter for mapping the coronary sinus of claim 2, wherein the distal section of the catheter body has a density that is greater than a density of the middle section.

4. The electrophysiology catheter for mapping the coronary sinus of claim 3, wherein the lumen of the distal section of the catheter body is filled with a block.

5. The electrophysiology catheter for mapping the coronary sinus of claim 4, wherein the block is a molten material filled in the lumen of the distal section of the catheter body after the catheter body is melted by heating.

6. The electrophysiology catheter for mapping the coronary sinus of claim 4, wherein the block is formed by curing a glue filling the lumen of the distal segment of the shaft.

7. The electrophysiology catheter for mapping the coronary sinus of claim 1, wherein the catheter body defines a plurality of pores for passing a first wire therethrough, the ring electrode covers the pores, a proximal end of the first wire passes through the pores and is electrically connected to the connector, the pores extend along an oblique angle with respect to an axial direction of the catheter body, the pores gradually extend from an outside of the catheter body to an inside of the catheter body toward the proximal end of the catheter body, and the oblique angle between the pore extension direction and the axial direction of the catheter body is between 30 ° and 70 °.

8. The electrophysiology catheter for mapping the coronary sinus of claim 1, wherein the ring electrode is embedded into the surface of the tube by swaging, wherein the surface of the ring electrode is flush with the surface of the tube.

9. The electrophysiology catheter for mapping the coronary sinus of claim 1, wherein the tip electrode comprises an end cap, an insertion portion connected to the end cap for inserting into the distal end of the catheter body, the proximal surface of the insertion portion being recessed to form an inner bore, the distal ends of the second wire and the safety wire being secured within the inner bore, the insertion portion having a protrusion on a sidewall thereof, the protrusion being embedded in an inner wall of the catheter body.

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