Hollow mapping electrode assembly

Abstract

The invention belongs to the field of medical instruments, and particularly relates to a hollow mapping electrode assembly which comprises a guide wire, a mapping catheter and a locking device. The guide wire is hollow, and a guide wire is arranged in the hollow part of the guide wire; a guide wire far-end electrode ring is arranged on the far-end side wall of the guide wire, and a guide wire near-end electrode ring is arranged on the near-end side wall of the guide wire; a mapping far-end electrode ring is arranged on the far-end side wall of the mapping catheter, and a mapping near-end electrode ring is arranged on the near-end side wall of the mapping catheter; the locking device comprises a tube body, a soft ring and a cap. The guide wire and the mapping catheter are used in cooperation, the number of the electrodes can be increased according to the situation, and mapping data in a larger range can be collected; the distance between the guide wire far-end electrode ring and the mapping far-end electrode ring can be properly adjusted according to conditions; the adopted locking device can lock the guide wire and the mapping catheter, the guide wire and the mapping catheter are prevented from sliding relatively, the attaching stability of the electrode ring and the cardiac cavity tissue is improved, and the risks of falling off and shifting are reduced.

Description

Technical Field

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

[0002] The traditional cardiac electrophysiological treatment method is to obtain the information of the internal organs of the human body through X-ray imaging or contrast imaging. This method increases the patient's exposure time to X-rays and the dosage of contrast agents, which can easily cause harm to the patient. The resulting image is a two-dimensional image, which increases the difficulty for doctors to identify and is very inconvenient to operate. Therefore, the coronary sinus mapping catheter is widely used in the mapping and catheter radiofrequency ablation of various complex arrhythmias due to its safety, accuracy and efficiency.

[0003] However, due to the large anatomical variation of the coronary venous system (CVS), complex adjacent structures, tortuous courses and numerous branches, the existing coronary sinus mapping catheters on the market are mostly flat bends, which make it difficult to enter the coronary sinus ostium. The collected electrophysiological signals are also relatively rigid and inflexible, and the collection interval cannot be flexibly adjusted. In addition, the catheter electrodes are not stably attached to the cardiac cavity tissue and are prone to fall off and shifting, resulting in unstable collected electrophysiological signals, which increases the difficulty of heart surgery and prolongs the operation time. Summary of the invention

[0004] The hollow mapping electrode assembly provided by the present invention can effectively solve the problems in the background technology.

[0005] The present invention provides a hollow mapping electrode assembly, comprising a guide wire, a mapping catheter and a locking device;

[0006] The guidewire is hollow, and a guidewire conductor is arranged in the hollow of the guidewire; a guidewire distal electrode ring is arranged on the distal side wall of the guidewire, and a guidewire proximal electrode ring is arranged on the proximal side wall of the guidewire, and the guidewire distal electrode ring and the guidewire proximal electrode ring are connected through the guidewire conductor;

[0007] The mapping catheter comprises a hollow inner layer and an outer layer sleeved outside the inner layer, and a mapping wire is arranged between the inner layer and the outer layer; a mapping distal electrode ring is arranged on the distal side wall of the mapping catheter, and a mapping proximal electrode ring is arranged on the proximal side wall of the mapping catheter, and the mapping distal electrode ring and the mapping proximal electrode ring are connected through the mapping wire; the inner layer of the mapping catheter is sleeved on the guide wire;

[0008] The locking device includes a tube body, a soft ring and a cap; one end of the tube body is provided with an external thread, the inner wall of the end is provided with a limiting portion, and the other end of the tube body is provided with a Luer connector; the soft ring is sleeved inside one end of the tube body and abuts against the limiting portion; the cap is sleeved on one end of the tube body and is provided with an internal thread corresponding to the external thread, the bottom end of the inner part of the cap is provided with an extrusion portion that extends into one end of the tube body and abuts against the soft ring, the extrusion portion is sleeve-shaped, and the bottom end of the cap is provided with a hole that passes through the extrusion portion; the tube body is sleeved on the proximal end of the guide wire, the proximal electrode ring of the guide wire passes through the soft ring and the hole, and the Luer connector can fix the proximal end of the mapping catheter.

[0009] As a further optimization of the present invention, the locking device also includes a washer; the washer is arranged between the soft ring and the extrusion part; an annular protrusion is provided on one end face of the washer, and an annular groove is provided on the other end face of the washer; the soft ring is provided with a soft ring groove corresponding to the annular protrusion; the extrusion part is provided with an extrusion protrusion corresponding to the annular groove.

[0010] As a further optimization of the present invention, the side wall of the tube body is provided with a third opening communicating with the tube body.

[0011] As a further optimization of the present invention, the guidewire is a double-stage guidewire, and two guidewire distal electrode rings and two guidewire proximal electrode rings are respectively provided and correspond to each other.

[0012] As a further optimization of the present invention, a first wire wrap and a second wire wrap, both of which are spiral, are provided in the hollow guide wire; the first wire wrap is provided between two electrode rings at the distal ends of the guide wire, one end of the second wire wrap is connected to the first wire wrap, and the other end of the second wire wrap is provided at the distal end of the guide wire; the first wire wrap is plastic; the second wire wrap and the first wire wrap are made of the same material or different materials.

[0013] As a further optimization of the present invention, the distal-end mapping electrode ring and the proximal-end mapping electrode ring are each provided with one or more electrodes and correspond to each other.

[0014] As a further optimization of the present invention, both ends of the guide wire distal electrode ring and the guide wire proximal electrode ring are provided with bamboo-node-shaped glue.

[0015] As a further optimization of the present invention, it also includes a cable plug; one end of the cable plug is detachably connected to the guide wire distal electrode ring, the guide wire proximal electrode ring, the mapping distal electrode ring or the mapping proximal electrode ring, and the other end of the cable plug is inserted into an external device.

[0016] As a further optimization of the present invention, the mapping catheter is further provided with a bending adjustment component, which includes a bending adjustment handle and a pull wire;

[0017] 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;

[0018] 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 distal end of the mapping catheter, and the other end of the pull wire passes through the clamping gap and penetrates the handle.

[0019] As a further optimization of the present invention, it also includes a plug, which includes a housing, a compression spring, a pressure block, a hose, a conductor and a conductor wire;

[0020] The shell is provided with a cavity, and a pressing part is provided on the shell; a compression spring is provided in the cavity; a pressure block is pressed on the compression spring, and the pressure block also corresponds to the pressing part; a hose passes through the pressure block; a conductor passes through the hose from the side of the pressure block; a conductor wire extends from one end of the shell into the cavity and is connected to the conductor; a guide wire or a proximal end of a mapping catheter is inserted into the hose from the other end of the shell, and a proximal electrode ring of the guide wire or a proximal electrode ring of the mapping catheter contacts the conductor;

[0021] Under the action of the compression spring, the hose bends from a straight state; by pressing the pressure block, the hose can return to a straight state.

[0022] The hollow mapping electrode assembly provided by the present invention can be used in conjunction with a guide wire and a mapping catheter to expand the number of electrodes according to the situation and collect mapping data in a wider range; the distance between the electrode ring at the distal end of the guide wire and the electrode ring at the distal end of the mapping can also be appropriately adjusted according to the situation; the locking device used can lock the guide wire and the mapping catheter to prevent them from sliding relative to each other, thereby improving the stability of the electrode ring against the cardiac cavity tissue and reducing the risk of falling off and displacement. The present invention also has the function of flexibly adjusting the bend at the distal end.

[0023] Instruction Manual

[0024] Figure 1 Schematic diagram of the internal structure of the guidewire in this embodiment;

[0025] Figure 2 is a schematic diagram of the structure of the mapping catheter of this embodiment;

[0026] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A;

[0027] Figure 4 is a schematic diagram of the cross-sectional structure of the locking device of this embodiment;

[0028] Figure 5 yes Figure 4 Schematic diagram of the assembly cutaway of the middle soft ring and the gasket;

[0029] Figure 6 This is a schematic diagram of the assembly structure of the pressure block, hose and conductor in the plug;

[0030] Figure 7 This is a schematic diagram of the bending handle structure in this embodiment;

[0031] Among them, the guide wire 1, the guide wire distal electrode ring 1a, the guide wire proximal electrode ring 1b, the guide wire conductor 1c, the first wire winding 1d, the second wire winding 1e, the core wire 1f, the mapping catheter 2, the mapping distal electrode ring 2a, the mapping proximal electrode ring 2b, the outer layer 2c, the inner layer 2d, the bamboo-shaped glue 2e, the locking device 3, the tube body 3a, the limiting part 3a1, the third opening 3a2, the soft ring 3b, the cap 3c, the extrusion part 3c1, the gasket 3d, the annular protrusion 3d1, the annular groove 3d2, the pressing block 4a, the hose 4b, the conductor 4c, the conductor conductor 4d, the bending handle 6, the gear 6a, the rack 6b, the handle 6c, and the pull wire 7. DETAILED DESCRIPTION

[0032] This embodiment includes a guide wire 1 , a mapping catheter 2 and a locking device 3 .

[0033] like Figure 1 As shown, the distal end of the guide wire 1 is provided with a guide wire distal electrode ring 1a sleeved on the side wall. In this embodiment, there are two guide wire distal electrode rings 1a, and in other embodiments, one or more than two guide wire distal electrode rings 1a may be provided. In this embodiment, two guide wire proximal electrode rings 1b are provided at the proximal end of the guide wire 1, which are opposite to the guide wire distal electrode ring 1a.

[0034] The guide wire 1 is hollow, and two guide wires 1c are arranged in the hollow of the guide wire 1, wherein the two ends of one guide wire 1c are respectively connected to a guide wire distal electrode ring 1a and a guide wire proximal electrode ring 1b, and the two ends of the other guide wire 1 are respectively connected to another guide wire distal electrode ring 1a and another guide wire proximal electrode ring 1b, so that the guide wire distal electrode ring 1a and the guide wire proximal electrode ring 1b form two sets of conductive structures. In addition to the guide wire 1c being arranged inside, the hollow guide wire 1 can also be inserted with a core wire 1f, and the core wire 1f is made of a nickel-titanium alloy material with excellent plastic deformation recovery performance.

[0035] like Figure 2 , Figure 3 As shown, the distal side wall of the mapping catheter 2 is provided with a mapping distal electrode ring 2a, and the proximal side wall of the mapping catheter 2 is provided with a mapping proximal electrode ring 2b. In this embodiment, four mapping distal electrode rings 2a and four corresponding mapping proximal electrode rings 2b are provided. In other embodiments, the mapping distal electrode ring 2a and the mapping proximal electrode ring 2b can also be set to one, two, three or more than four.

[0036] In this embodiment, the mapping catheter 2 includes a hollow inner layer 2d and an outer layer 2c sleeved outside the inner layer 2d. The mapping wires used to connect the four mapping distal electrode rings 2a and the four mapping proximal electrode rings 2b are arranged between the inner layer 2d and the outer layer 2c, and the gap between the inner layer 2d and the outer layer 2c just accommodates the four mapping wires, so that the four mapping wires can only be arranged in order without being staggered.

[0037] The inner layer 2d of the mapping catheter 2 is sleeved on the guide wire 1. The guide wire 1 can slide back and forth in the mapping catheter 2, and the guide wire distal electrode ring 1a is completely exposed from the distal end of the mapping catheter 2. During surgery, the amount of ECG signal collection can be increased or decreased by replacing the guide wire 1 with different numbers of guide wire distal electrode rings 1a, and the distance between the guide wire distal electrode ring 1a and the mapping distal electrode ring 2a can be changed by adjusting the relative position of the guide wire 1 and the mapping catheter 2.

[0038] Furthermore, if Figure 7 As shown, the bending adjustment handle 6 of this embodiment is also provided with a bending adjustment assembly, and the bending adjustment assembly includes the bending adjustment handle 6 and a pull wire 7.

[0039] The bending handle 6 is arranged at the proximal end of the mapping catheter 2, and 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 mounted 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 mapping catheter 2 and are distributed on both sides of the inner layer. One end of the pull wire 7 is fixed to the distal end of the mapping catheter 2. 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 an offset 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 an offset 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 addition, in this embodiment, the distal end of the guide wire 1 is usually provided with a fixed curved section. A fixed curved section and an adjustable curved section are used in conjunction with each other and can be well applied to structures adjacent to the coronary sinus system that are complex, tortuous, and have many branches.

[0045] Furthermore, in this embodiment, the hollow interior of the guide wire 1 is further provided with a first spiral winding 1d and a second spiral winding 1e, such as Figure 1 As shown, the first wire wrap 1d is arranged between the two distal electrode rings 1a of the guide wire, one end of the second wire wrap 1e is connected to the first wire wrap 1d, and the other end of the second wire wrap 1e is arranged at the distal end of the guide wire 1.

[0046] In this embodiment, the area formed by the first wire winding 1d is a plastic area. The first wire winding 1d is made of 304 stainless steel. The initial state of the plastic area is a straight state. When in use, the operator can bend the area into a desired shape according to needs. The second wire winding 1e is made of tungsten wire, and the spiral radius of the end of the second wire winding 1e connected to the first wire winding 1d to the end toward the distal end of the guide wire 1 is getting smaller and smaller, that is, the second wire winding 1e is formed into an increasingly thin shape from the direction toward the proximal end of the guide wire 1 to the direction toward the distal end of the guide wire 1.

[0047] Because the heart structures of different patient groups are different, the position of the coronary sinus ostium is not fixed. They have different shapes and positions. In order to facilitate the operation, the double-stage guide wire 1 in this embodiment can be used to adjust the bending shape according to the heart structure characteristics of different groups of people, so that the double-stage guide wire 1 can better enter the coronary sinus ostium, reducing the difficulty of the doctor's operation during the operation.

[0048] In another embodiment, the second wire 1e and the first wire 1d are made of the same material, that is, the second wire 1e and the first wire 1d are made of one wire, or the first wire 1d is also used as the second wire 1e. This embodiment can avoid the connection problem between wires of different materials.

[0049] like Figure 4 , Figure 5 As shown, the locking device 3 includes a tube body 3a, a soft ring 3b and a cover cap 3c.

[0050] The tube body 3a is a straight pipe. One end of the tube body 3a is provided with an external thread. The inner wall of the end is provided with a limiter 3a1. The function of the limiter 3a1 is to resist the soft ring 3b sleeved in the end, so that the soft ring 3b can no longer move into the tube. Therefore, the soft ring 3b is sleeved in one end of the tube body 3a and resists the limiter 3a1. The other end of the tube body 3a is provided with a Luer connector. The cap 3c is sleeved on one end of the tube body 3a and is provided with an internal thread corresponding to the external thread. The bottom end of the inner part of the cap 3c is provided with an extrusion part 3c1 that extends into one end of the tube body 3a and resists the soft ring 3b. The extrusion part 3c1 is sleeve-shaped, and the bottom end of the cap 3c is provided with a hole that passes through the extrusion part 3c1. Through the threaded connection between the cap 3c and the tube body 3a, the extrusion part 3c1 squeezes the soft ring 3b to deform the inner hole and shrink, which plays the role of extrusion and fixing.

[0051] Furthermore, the locking device 3 in this embodiment further includes a gasket 3d. The gasket 3d is arranged between the soft ring 3b and the extrusion portion 3c1. An annular protrusion 3d1 is arranged on one end surface of the gasket 3d, and an annular groove 3d2 is arranged on the other end surface of the gasket 3d. The soft ring 3b is provided with a soft ring groove corresponding to the annular protrusion 3d1. The extrusion portion 3c1 is provided with an extrusion protrusion corresponding to the annular groove 3d2. The gasket 3d having such a structure can play a role in positioning and guiding, and can also play a role in strengthening the seal.

[0052] When in use, the tube body 3a is sleeved on the proximal end of the guide wire 1, the proximal electrode ring 1b of the guide wire passes through the soft ring 3b and the hole, and the Luer connector can fix the proximal end of the mapping catheter 2. The locking device 3 in this embodiment can fix and release the guide wire 1 and the mapping catheter 2 on the one hand, and on the other hand, it does not affect the connection between the proximal electrode ring 1b of the guide wire and external equipment.

[0053] Furthermore, it also includes a cable plug, one end of which is detachably connected to the guide wire distal electrode ring 1a, the guide wire proximal electrode ring 1b, the mapping distal electrode ring 2a or the mapping proximal electrode ring 2b, and the other end of the cable plug is inserted into an external device. After the guide wire proximal electrode ring 1b passes through the tube body 3a, the cable plug is installed to connect to the external device.

[0054] Furthermore, if Figure 6 As shown, this embodiment further includes a plug, which includes a housing, a compression spring, a pressure block 4a, a hose 4b and a conductor 4c.

[0055] The shell is provided with a cavity, and a pressing portion is provided on the shell. A compression spring is provided in the cavity, one end of the compression spring is fixed at the bottom of the cavity, and the other end of the compression spring faces the pressing portion. A pressing block 4a is pressed on the other end of the compression spring, and the top end of the pressing block 4a is provided at the pressing portion. Pressing the pressing portion can cause the pressing block 4a to press the compression spring.

[0056] The hose 4b penetrates the pressing block 4a. There are two conductors 4c, which penetrate the hose 4b from both sides of the pressing block 4a, and the two conductors 4c are connected to the conductor wires 4d, and the conductor wires 4d extend from one end of the shell to the shell and connect to external equipment. The proximal end of the two-stage guide wire 1 is inserted into the hose 4b from the other end of the shell, and the two guide wire proximal electrode rings 1b are respectively in contact with the two conductors 4c located in the hose 4b.

[0057] Under the action of the compression spring, the hose 4b bends from a straight state; by pressing the pressing block 4a, the hose 4b can return to a straight state.

[0058] When in use, after the two-stage guide wire 1 is inserted into the hose 4b, the hose 4b is bent upward from a straight state to a bridge shape under the action of the compression spring, and the two-stage guide wire 1 cannot be pulled out at this time. If you want to pull out the two-stage guide wire 1, you only need to press the pressing part to make the pressing block 4a sink to overcome the spring force, so that the hose 4b returns to a straight state, and the two-stage guide wire 1 can be easily pulled out.

[0059] In other embodiments, one or more conductors 4c of the plug may be provided corresponding to the electrode ring. In yet another embodiment, the plug may also be used to connect with the proximal electrode ring 2b for mapping.

[0060] Preferably, in this embodiment, a third opening 3a2 communicating with the tube body 3a is further provided on the side wall of the tube body 3a. The third opening 3a2 may also be provided with another Luer connector, which is blocked with a plug when not in use, and is removed with a syringe to inject saline for cleaning when in use. Since the proximal electrode ring 1b of the guide wire has already passed through the hole, the saline does not come into contact with any electrode ring.

[0061] Preferably, the guidewire distal electrode ring 1a and the guidewire proximal electrode ring 1b in this embodiment are both provided with bamboo-joint glue 2e. In addition to fixing the guidewire distal electrode ring 1a and the guidewire proximal electrode ring 1b, the bamboo-joint glue 2e can also fill the gaps generated when the guidewire distal electrode ring 1a and the guidewire proximal electrode ring 1b are riveted, thereby playing a sealing role. Because the guidewire distal electrode ring 1a and the guidewire proximal electrode ring 1b have relatively sharp edges, they may damage the blood vessels when advancing and retreating in the blood vessels. In this embodiment, the bamboo-joint glue 2e can reduce the damage of the instrument itself to the human body, potentially reducing the risk of surgery.

[0062] 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 assembly, characterized in that: Includes guidewire, mapping catheter and locking device; The guidewire is hollow, and a guidewire conductor is arranged in the hollow of the guidewire; a guidewire distal electrode ring is arranged on the distal side wall of the guidewire, and a guidewire proximal electrode ring is arranged on the proximal side wall of the guidewire, and the guidewire distal electrode ring and the guidewire proximal electrode ring are connected through the guidewire conductor; The mapping catheter comprises a hollow inner layer and an outer layer sleeved outside the inner layer, and a mapping wire is arranged between the inner layer and the outer layer; a mapping distal electrode ring is arranged on the distal side wall of the mapping catheter, and a mapping proximal electrode ring is arranged on the proximal side wall of the mapping catheter, and the mapping distal electrode ring and the mapping proximal electrode ring are connected through the mapping wire; the inner layer of the mapping catheter is sleeved on the guide wire; The locking device includes a tube body, a soft ring and a cap; one end of the tube body is provided with an external thread, the inner wall of the end is provided with a limiting portion, and the other end of the tube body is provided with a Luer connector; the soft ring is sleeved inside one end of the tube body and abuts against the limiting portion; the cap is sleeved on one end of the tube body and is provided with an internal thread corresponding to the external thread, the bottom end of the inner part of the cap is provided with an extrusion portion that extends into one end of the tube body and abuts against the soft ring, the extrusion portion is sleeve-shaped, and the bottom end of the cap is provided with a hole that passes through the extrusion portion; the tube body is sleeved on the proximal end of the guide wire, the proximal electrode ring of the guide wire passes through the soft ring and the hole, and the Luer connector can fix the proximal end of the mapping catheter.

2. A hollow mapping electrode assembly according to claim 1, characterized in that: The locking device also includes a washer; the washer is arranged between the soft ring and the extrusion part; one end face of the washer is provided with an annular protrusion, and the other end face of the washer is provided with an annular groove; the soft ring is provided with a soft ring groove corresponding to the annular protrusion; the extrusion part is provided with an extrusion protrusion corresponding to the annular groove.

3. The hollow mapping electrode assembly according to claim 1, characterized in that: The side wall of the tube body is provided with a third opening communicated with the tube body.

4. The hollow mapping electrode assembly according to claim 1, characterized in that: The guide wire is a double-stage guide wire, and two electrode rings at the distal end of the guide wire and two electrode rings at the proximal end of the guide wire are respectively provided and correspond to each other.

5. The hollow mapping electrode assembly according to claim 4, characterized in that: A first wire wrap and a second wire wrap, both of which are spiral, are also provided in the hollow guide wire; the first wire wrap is provided between two electrode rings at the distal ends of the guide wire, one end of the second wire wrap is connected to the first wire wrap, and the other end of the second wire wrap is provided at the distal end of the guide wire; the first wire wrap is plastic; the second wire wrap and the first wire wrap are made of the same material or different materials.

6. The hollow mapping electrode assembly according to claim 1, characterized in that: There is one or more mapping distal electrode rings and one or more mapping proximal electrode rings respectively and they correspond to each other.

7. The hollow mapping electrode assembly according to claim 1, characterized in that: Both ends of the guide wire distal end electrode ring and the guide wire proximal end electrode ring are provided with bamboo-node-shaped glue.

8. The hollow mapping electrode assembly according to claim 1, characterized in that: It also includes a cable plug; one end of the cable plug is detachably connected to the guide wire distal electrode ring, the guide wire proximal electrode ring, the mapping distal electrode ring or the mapping proximal electrode ring, and the other end of the cable plug is inserted into an external device.

9. The hollow mapping electrode assembly according to claim 1, characterized in that: The mapping catheter is also provided with a bending adjustment component, which includes a bending 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 distal end of the mapping catheter, and the other end of the pull wire passes through the clamping gap and penetrates the handle.

10. The hollow mapping electrode assembly according to claim 1, characterized in that: Also included is a plug, which includes a housing, a compression spring, a pressure block, a hose, a conductor, and a conductor wire; The shell is provided with a cavity, and a pressing part is provided on the shell; a compression spring is provided in the cavity; a pressure block is pressed on the compression spring, and the pressure block also corresponds to the pressing part; a hose passes through the pressure block; a conductor passes through the hose from the side of the pressure block; a conductor wire extends from one end of the shell into the cavity and is connected to the conductor; a guide wire or a proximal end of a mapping catheter is inserted into the hose from the other end of the shell, and a proximal electrode ring of the guide wire or a proximal electrode ring of the mapping catheter contacts the conductor; Under the action of the compression spring, the hose bends from a straight state; by pressing the pressure block, the hose can return to a straight state.

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