Hollow mapping electrode catheter

Abstract

The invention belongs to the field of medical instruments, and particularly relates to a hollow mapping electrode catheter which comprises a body, an electrode ring and an electrode wire. The body comprises a hollow inner layer and an outer layer arranged outside the inner layer in a sleeving mode, and a fixed or adjustable bent shape is arranged at the far end of the body. The electrode ring sleeves the outer side wall of the far end of the body; the electrode wire is arranged between the inner layer and the outer layer of the body and corresponds to the electrode ring, one end of the electrode wire is connected with the electrode ring, and the other end of the electrode wire extends out of the near end of the body. Medical tools such as guide wires can be conveyed through the hollow cavity, and the conveyed medical tools can be replaced at any time according to conditions. The number of the electrodes can be increased. The bending shape can also be adjusted.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a hollow mapping electrode catheter. Background Art

[0002] The electrophysiological electrode catheter is a key component used to record electrophysiological signals from various parts of the heart, electrically stimulate the heart, and perform electrophysiological mapping of heart diseases. The operation method is to first puncture the femoral vein or internal jugular vein, and under the guidance of X-ray fluoroscopy, send the mapping electrode catheter along the vascular cavity to different positions in the heart cavity, perform electrophysiological examination of the heart, induce and diagnose various arrhythmias, identify the origin of arrhythmias, and provide the necessary basis for radiofrequency ablation treatment.

[0003] Electrophysiological mapping of the coronary venous system (CVS) plays a very important role. Many electrophysiological examinations require the placement of mapping electrode catheters in the CVS. For example, left epicardial bypass, ventricular premature beats of epicardial origin, and complex atrial fibrillation require ablation in the coronary veins. The left ventricular electrode of cardiac resynchronization therapy (CRT) is also placed in the coronary veins. Due to the large anatomical variation of CVS, complex adjacent structures, tortuous shape, and many branches, the existing coronary sinus mapping catheters on the market are mostly flat, making it difficult to enter the coronary sinus ostium. In addition, the catheter electrode is not in stable contact with the cardiac cavity tissue, and is easy to fall off and shift, resulting in unstable electrophysiological signals collected, which increases the difficulty of cardiac surgery and prolongs the operation time.

[0004] The structure disclosed in the patented dual-purpose catheter for intracardiac mapping and defibrillation (Announcement No. CN204890964U) includes a hollow insulating catheter, an electrode wire for conducting with an electrode group is arranged in the catheter, and a safety wire for easy bending and a guide wire for supporting hardness are arranged in the catheter. In this patent, the electrode wire, safety wire, and guide wire are arranged in a hollow catheter without any rules, which will cause uneven hardness distribution of the catheter, and it is easy to pull the electrode wire when withdrawing the guide wire, causing the electrode wire to fall off or excessive friction to affect the withdrawal of the guide wire; and this patent cannot use the catheter for mapping expansion. Summary of the invention

[0005] The present invention provides a hollow mapping electrode catheter, which can effectively solve the problems in the background technology.

[0006] The present invention provides a hollow mapping electrode catheter, comprising a body, an electrode ring and an electrode wire;

[0007] The body comprises a hollow inner layer and an outer layer sleeved outside the inner layer, and a fixed or adjustable bend is provided at the far end of the body;

[0008] The electrode ring is sleeved on the outer side wall at the distal end of the body;

[0009] The electrode wire is arranged between the inner layer and the outer layer of the body, the electrode wire corresponds to the electrode ring, one end of the electrode wire is connected to the electrode ring, and the other end of the electrode wire extends from the proximal end of the body.

[0010] As a further optimization of the present invention, the bend of the distal end of the body is adjustable, including a bend adjustment handle and a pull wire;

[0011] The bending handle includes a gear, a handle and two parallel racks with opposite teeth; the gear is arranged between the two racks, the gear is meshed with the two racks, and a clamping gap is arranged between the rotating shaft of the gear and the root of the rack; the rack and the gear are arranged on the handle;

[0012] There are two pull wires, which are arranged between the inner layer and the outer layer and distributed on both sides of the inner layer. One end of the pull wire is fixed to the far end of the body, and the other end of the pull wire passes through the clamping gap and penetrates the handle.

[0013] As a further optimization of the present invention, the distal end of the body is a closed or openable structure.

[0014] As a further optimization of the present invention, a plurality of electrode rings are provided, and the plurality of electrode rings are arranged at intervals; the electrode rings are platinum-iridium rings.

[0015] As a further optimization of the present invention, bamboo-shaped glue is provided at both ends of the electrode ring.

[0016] As a further optimization of the present invention, the distal end of the main body is an open structure; it also includes a guide wire; a guide wire electrode is provided on the distal outer wall of the guide wire, and a guide wire conductor is provided inside the guide wire; one end of the guide wire conductor is connected to the guide wire electrode, and the other end of the guide wire conductor extends from the proximal end of the guide wire; the guide wire is inserted into the inner layer of the main body and the guide wire electrode is exposed from the distal end of the main body.

[0017] As a further optimization of the present invention, the other end of the electrode wire extends from the proximal end of the body and is connected to the electrode cable plug; the other end of the guide wire wire extends from the proximal end of the guide wire and is connected to the guide wire cable plug.

[0018] As a further optimization of the present invention, it also includes an external device; the external device is provided with an interface corresponding to the electrode cable plug and the guide wire cable plug.

[0019] As a further optimization of the present invention, two guide wire electrodes are provided, namely a first electrode and a second electrode.

[0020] As a further optimization of the present invention, it also includes an aviation plug; the aviation plug includes a shell and a core;

[0021] The shell includes a component 1 and a component 2; the component 1 is provided with a through hole, the through hole is in the shape of a wine bottle, one end of the through hole is a shrinking end, and the other end of the through hole is an expanding end; the electrode cable plug and the guide wire cable plug extend from the shrinking end into the expanding end;

[0022] One end of the core body is a first plug-in end, and the other end of the core body is a second plug-in end; the first plug-in end extends from the flared end into component one and then plugs into the electrode cable plug and the guide wire cable plug; the core body is fixed at the flared end;

[0023] The second component is in the shape of a sleeve, and is sleeved on the second plug-in end of the core body and connected with the first component.

[0024] The hollow mapping electrode catheter provided by the present invention adopts a hollow structure, and can deliver medical tools such as guide wires through the hollow cavity, and can also replace the delivered medical tools at any time according to the situation. The catheter and guide wire of the present invention are used together to expand the number of electrodes according to the situation and collect mapping data in a larger range; the guide wire can also be connected to an external radio frequency instrument to realize the radio frequency treatment function. The adjustable bend model of the present invention can also adjust the bend shape.

[0025] Instruction Manual

[0026] Figure 1 Schematic diagram of the appearance of this embodiment;

[0027] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0028] Figure 3 yes Figure 1 A partial enlarged schematic diagram of part B in the middle;

[0029] Figure 4 yes Figure 1 The enlarged cross-sectional diagram of the middle C part;

[0030] Figure 5 Schematic diagram of the bending handle structure in this embodiment;

[0031] Among them, the main body 1, the electrode ring 2, the electrode wire 3, the bamboo-shaped glue 4, the aviation plug 5, the component one 5a, the component two 5b, the core 5c, the bending adjustment handle 6, the gear 6a, the rack 6b, the handle 6c, and the pull wire 7. DETAILED DESCRIPTION

[0032] like Figure 1-4 As shown, this embodiment includes a body 1, an electrode ring 2 and an electrode wire 3.

[0033] The body 1 is hollow, and comprises a hollow inner layer and an outer layer sleeved outside the inner layer.

[0034] An electrode ring 2 is sleeved on the outer side wall of the distal end of the body 1. In this embodiment, four electrode rings 2 are provided, and the four electrode rings 2 are arranged at intervals of 1mm-10mm. The four electrode rings 2 are made of platinum-iridium alloy. In other embodiments, the electrode rings 2 can also be arranged at intervals of one, ten or any other number. In other embodiments, the electrode rings 2 can also be made of other materials such as 304 stainless steel.

[0035] It also includes an electrode wire 3, which is arranged between the inner layer and the outer layer of the body 1. In this embodiment, four electrode wires 3 are arranged, one end of each electrode wire 3 is connected to an electrode ring 2, and the other end of the electrode wire 3 is extended from the proximal end of the body 1 and connected to an electrode cable plug. The electrode cable plug is a 5 / 11 core copper column connector, which can be directly connected to a multi-channel electrophysiological instrument.

[0036] Both ends of the electrode ring 2 are provided with bamboo-like glue 4, which, in addition to fixing the electrode ring 2, can also fill the gap between the electrode ring 2 and the outer layer of the body 1 when riveting, and can also seal the electrode ring 2. Because the electrode ring 2 has a relatively sharp edge, the body 1 may damage the blood vessel when advancing and retreating in the blood vessel. In this embodiment, the bamboo-like glue 4 can reduce the damage of the instrument itself to the human body, potentially reducing the risk of surgery.

[0037] This embodiment adopts a hollow structure, which is convenient for inserting medical tools such as guide wires. Since the inner layer is provided to isolate the wires, the medical tools will not affect the wires during insertion or removal. In addition, the inner layer and the outer layer of the body 1 form an annular space, which is more conducive to the orderly arrangement of the wires, avoiding the situation in which the wires are chaotically twisted together in the existing structure.

[0038] In other embodiments, the distal end of the body 1 may be provided with a fixed bend, such as a fixed bend with a bending radius of 60 mm and a bending angle of 120°. However, in this embodiment, the distal end of the body 1 is provided with an adjustable bending structure, such as Figure 5 As shown, it also includes a bending handle 6 and a pull wire 7.

[0039] The bending handle 6 comprises a gear 6a, a handle 6c and two parallel racks 6b with opposite teeth. The gear 6a is arranged between the two racks 6b and meshes with the two racks 6b at the same time. The handle 6c is used for hand-held operation, and the two racks 6b and the gear 6a are both installed on the handle 6c.

[0040] A clamping gap is also provided between the rotating shaft of the gear 6a and the root of the rack 6b.

[0041] Two pull wires 7 are arranged between the inner layer and the outer layer of the body 1 and are distributed on both sides of the inner layer. One end of the pull wire 7 is fixed to the far end of the body 1. The pull wire 7 is a stainless steel flat wire with a rectangular cross section. The other ends of the two pull wires 7 pass through the clamping gap from both sides and then penetrate the handle 6c. The gear 6a and the rack 6b clamp the two pull wires 7 through the clamping gap.

[0042] During operation, the two pull wires 7 are pulled forward and backward in a staggered manner. Under the action of friction, the gear 6a is driven to rotate through the clamping gap. The rotation of the gear 6a drives the two racks 6b to move forward and backward in a staggered manner, thereby realizing the function of adjusting the bending of the electrode catheter.

[0043] The bending handle 6 of this structure can, on the one hand, fix the two pull wires 7, and on the other hand, reduce the friction between the pull wires 7 and the clamping gap when the pull wires 7 are pulled.

[0044] In other embodiments, the distal end of the body 1 can be a closed result. In the present embodiment, the distal end of the body 1 is an openable structure, specifically a metal cap that can be unscrewed or bonded, such as stainless steel, platinum-iridium alloy and other metal materials. In other embodiments, a plug made of plastic polymer materials such as TPU, PEABAX, PU, ​​PE, etc. can also be used and fixed to the distal end of the body 1 by heat welding. These structures are used in occasions where the distal end of the body 1 needs to be blocked. Of course, if it is to be used with a guide wire, just open the structure, insert the guide wire and it will extend from the distal end of the body 1.

[0045] Furthermore, this embodiment also provides a guide wire for use with a catheter.

[0046] The guide wire is inserted into the inner layer of the body 1, and the guide wire is a bipolar guide wire, that is, two guide wire electrodes are arranged on the outer wall of the distal end of the guide wire, namely, the first electrode and the second electrode. In other embodiments, the guide wire can also be arranged as one electrode, three electrodes or other number of electrodes.

[0047] The guidewire in this embodiment also includes two guidewire conductors, one end of the two guidewire conductors is connected to the first electrode and the second electrode respectively, the two guidewire conductors are arranged in the guidewire, and the other end of the guidewire conductor extends from the proximal end of the guidewire to be connected to the guidewire cable plug.

[0048] The guide wire cable plug is divided into two parts, which divides the electrical signal of one electrode ring into two groups and transmits them to the device.

[0049] The catheter in this embodiment is used for intracardiac mapping, especially for measuring electrophysiological signals of the coronary vein and the distal end of the coronary vein, while the guidewire can penetrate into the distal end of the coronary sinus to measure the potential of the left atrium or right ventricle. Therefore, the catheter and the guidewire can be used together to expand the measurement of potential and collect more comprehensive information. The catheter and the guidewire can also adopt differentiated bends in the bend section to collect more point information.

[0050] Furthermore, a first guide wire cable plug and a second guide wire cable plug are respectively provided corresponding to the first electrode and the second electrode.

[0051] It also includes an aviation plug 5, which includes a shell and a core 5c.

[0052] The housing includes a component 1 5a and a component 2 5b. Component 1 5a is provided with a bottle-shaped through hole, the bottle mouth portion of the through hole is a constricted end, and the constricted end fixes the electrode wire 3 and the guide wire. The bottle body portion of the hole is an expanded end, and the electrode cable plug and the guide wire cable plug extend from the constricted end to the expanded end.

[0053] One end of the core body 5c is a first plug-in end, and the other end of the core body 5c is a second plug-in end. The first plug-in end extends from the flared end into component 1 5a and then plugs into the electrode cable plug and the guide wire cable plug.

[0054] The second component 5b is sleeve-shaped, and is sleeved on the second plug-in end of the core 5c and connected with the first component 5a. The second component 5b and the first component 5a cover the core 5c in the cavity.

[0055] Whether the first plug-in end and the second plug-in end are pins or sockets depends on specific circumstances.

[0056] In this embodiment, the shell is made of plastic material, the shape of the core 5c is designed to correspond to the shape of the expanded end of the shell, and the core 5c and the expanded end are fixed by interference fit. This connection method can be installed and disassembled on the one hand, and can also play a sealing role on the other hand. The second component 5b is also made of plastic material, and the second component 5b and the core 5c are also interference fit.

[0057] This embodiment adopts a hollow structure, and medical tools such as guide wires can be delivered through the hollow cavity, and the delivered medical tools can be replaced at any time according to the situation. The catheter and guide wire can be used together to expand the number of electrodes according to the situation and collect mapping data in a wider range; the guide wire can also be connected to an external radio frequency device to realize radio frequency treatment function.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A hollow mapping electrode catheter, characterized in that: It includes a body, an electrode ring and an electrode wire; The body comprises a hollow inner layer and an outer layer sleeved outside the inner layer, and a fixed or adjustable bend is provided at the far end of the body; The electrode ring is sleeved on the outer side wall at the distal end of the body; The electrode wire is arranged between the inner layer and the outer layer of the body, the electrode wire corresponds to the electrode ring, one end of the electrode wire is connected to the electrode ring, and the other end of the electrode wire extends from the proximal end of the body.

2. The hollow mapping electrode catheter according to claim 1, characterized in that: The distal end of the body is adjustable in bend shape, including a bend adjustment handle and a pull wire; The bending handle includes a gear, a handle and two parallel racks with opposite teeth; the gear is arranged between the two racks, the gear is meshed with the two racks, and a clamping gap is arranged between the rotating shaft of the gear and the root of the rack; the rack and the gear are arranged on the handle; There are two pull wires, which are arranged between the inner layer and the outer layer and distributed on both sides of the inner layer. One end of the pull wire is fixed to the far end of the body, and the other end of the pull wire passes through the clamping gap and penetrates the handle.

3. The hollow mapping electrode catheter according to claim 1, characterized in that: The distal end of the body is a closed or openable structure.

4. The hollow mapping electrode catheter according to claim 1, characterized in that: There are a number of electrode rings, which are arranged at intervals; the electrode rings are made of platinum-iridium rings.

5. The hollow mapping electrode catheter according to claim 1, characterized in that: Bamboo-shaped glue is provided at both ends of the electrode ring.

6. The hollow mapping electrode catheter according to claim 1, characterized in that: The distal end of the body is an open structure; it also includes a guide wire; a guide wire electrode is provided on the distal outer wall of the guide wire, and a guide wire conductor is provided inside the guide wire; one end of the guide wire conductor is connected to the guide wire electrode, and the other end of the guide wire conductor extends from the proximal end of the guide wire; the guide wire is inserted into the inner layer of the body and the guide wire electrode is exposed from the distal end of the body.

7. The hollow mapping electrode catheter according to claim 6, characterized in that: The other end of the electrode lead is extended from the proximal end of the body and connected to the electrode cable plug; the other end of the guide wire lead is extended from the proximal end of the guide wire and connected to the guide wire cable plug.

8. The hollow mapping electrode catheter according to claim 7, characterized in that: It also includes an external device; the external device is provided with an interface corresponding to the electrode cable plug and the guide wire cable plug.

9. The hollow mapping electrode catheter according to claim 6, characterized in that: There are two guide wire electrodes, namely a first electrode and a second electrode.

10. The hollow mapping electrode catheter according to claim 7, characterized in that: It also includes an aviation plug; the aviation plug includes a shell and a core; The shell includes a component 1 and a component 2; the component 1 is provided with a through hole, the through hole is in the shape of a wine bottle, one end of the through hole is a shrinking end, and the other end of the through hole is an expanding end; the electrode cable plug and the guide wire cable plug extend from the shrinking end into the expanding end; One end of the core body is a first plug-in end, and the other end of the core body is a second plug-in end; the first plug-in end extends from the flared end into component one and then plugs into the electrode cable plug and the guide wire cable plug; the core body is fixed at the flared end; The second component is in the shape of a sleeve, and is sleeved on the second plug-in end of the core body and connected with the first component.

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