WO2022001670A1 - Puncture needle and puncture system - Google Patents

Abstract

Disclosed in the present invention are a puncture needle (40) and a puncture system (100). The puncture needle (40) comprises an electrode tip (41) and a sleeve (43) sleeved on the electrode tip (41). The electrode tip (41) is partially accommodated in the sleeve (43), so that the distal end of the electrode tip (41) is exposed out of the sleeve (43); a fluid passage (45) is formed between the electrode tip (41) and the sleeve (43); the fluid passage (45) comprises at least one water outlet (451); and the at least one water outlet (451) is close to the distal end of the electrode tip (41). By configuring the at least one water outlet (451) of the fluid passage (45) to be close to the distal end of the electrode tip (41), the position of the distal end of the electrode tip (41) can be quickly and accurately positioned, thus improving the safety of puncture operations.

Description

Puncture needles and puncture systems

This application claims the priority of the Chinese patent application with the application number CN 202010600461.8 and the invention titled "Puncture Needle and Puncture System" filed with the China Patent Office on June 28, 2020 and filed with the China Patent Office on June 28, 2020 , the priority of the Chinese patent application with the application number CN 202021217024.X and the invention titled "Puncture Needle and Puncture System", the entire contents of which are incorporated in this application by reference.

technical field

The invention relates to the technical field of medical instruments, in particular to a puncture needle and a puncture system.

Background technique

Some medical operations need to be performed in the left atrium, and the way for surgical instruments to enter the left atrium is usually from the right atrium puncture into the left atrium, that is, through the atrial septal puncture and then into the left atrium. However, in the process of atrial septal puncture, if the positioning of the puncturing device is not accurate, the tissue around the atrial septum is vulnerable to accidental puncture. How to position the puncture device, accurately place the distal end of the puncture device at the desired position of the septum, puncture the interatrial septum safely and quickly, and avoid accidental puncture, these are the challenges faced by surgery.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a puncture needle and a puncture system to solve the above problems.

In a first aspect, an embodiment of the present application provides a puncture needle, including an electrode tip and a sleeve sleeved over the electrode tip, the electrode tip is partially accommodated in the sleeve, so that the distal end of the electrode tip is Exposed outside the sleeve, a fluid channel is formed between the electrode tip and the sleeve, the fluid channel includes at least one water outlet, and the at least one water outlet is close to the distal end of the electrode tip.

In a second aspect, an embodiment of the present application provides a puncture system, including a handle, a liquid supply pipeline, and the above-mentioned puncture needle, wherein the distal end of the handle is fixedly connected to the proximal end of the puncture needle, and the handle has a The middle part is fixedly connected with the liquid supply pipeline, and the liquid supply pipeline communicates with the fluid channel; the proximal end of the handle is connected to an external energy generator.

Compared with the prior art, the present invention discloses a puncture needle and a puncture system. The puncture needle includes an electrode head and a sleeve for covering the electrode head, the electrode head is partially accommodated in the sleeve, so that the distal end of the electrode head is exposed outside the sleeve, a fluid channel is formed between the electrode head and the sleeve, and the fluid channel includes at least One water outlet, at least one water outlet is close to the distal end of the electrode head, and at least one water outlet of the fluid channel is arranged close to the distal end of the electrode head, so that the position of the distal end of the electrode head can be quickly and accurately positioned, thereby improving the The safety of puncture surgery.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a first embodiment of a puncture system provided by the present invention.

FIG. 2 is a schematic structural diagram of another angle of the puncture needle of the puncture system in FIG. 1 .

FIG. 3 is a schematic structural diagram of the first embodiment of the electrode tip and the inner sleeve of the puncture needle provided by the present invention.

FIG. 4 is a schematic structural diagram of the second embodiment of the electrode tip and the inner sleeve of the puncture needle provided by the present invention.

FIG. 5 is a schematic structural diagram of a third embodiment of the electrode tip and the inner sleeve of the puncture needle provided by the present invention.

6 is a schematic structural diagram of a fourth embodiment of the electrode tip and the inner sleeve of the puncture needle provided by the present invention.

FIG. 7 is a schematic structural diagram of part I of the puncture needle of the puncture system in FIG. 1 .

FIG. 8 is a cross-sectional view of the puncturing system of FIG. 1 .

FIG. 9 is a schematic structural diagram of part II of the puncture needle of the puncture system in FIG. 8 .

FIG. 10 is a schematic structural diagram of Embodiment 1 of part III of the puncture system in FIG. 8 .

FIG. 11 is a schematic structural diagram of the second embodiment of the III part of the puncture system in FIG. 8 .

12 is a schematic structural diagram of a second embodiment of the puncture system provided by the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used herein, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. Further, when used in this specification, the terms "comprising" and/or "comprising" indicate the presence of stated features, integers, steps, elements and/or components, but do not exclude one or more other features, integers, The presence or addition of steps, elements, components and/or combinations thereof. Subsequent descriptions in the specification are preferred embodiments for implementing the present invention, however, the descriptions are for the purpose of illustrating the general principles of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be determined by the appended claims.

Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a schematic structural diagram of a puncture system 100 according to an embodiment of the present invention; FIG. 2 is a structural schematic diagram of a puncture needle 40 of the puncture system 100 . The puncture system 100 includes a handle 10 , a fluid supply line 30 and a puncture needle 40 . The distal end of the handle 10 is fixedly connected to the proximal end of the puncture needle 40 . The middle of the handle 10 is fixedly connected with the liquid supply pipeline 30 . The puncture needle 40 includes an electrode tip 41 and a cannula 43 which is sleeved with the electrode tip 41 . The electrode tip 41 is partially accommodated in the sleeve 43 , so that the distal end of the electrode tip 41 is exposed outside the sleeve 43 . A fluid channel 45 is formed between the electrode tip 41 and the sleeve 43 . The fluid channel 45 includes at least one water outlet 451 . At least one water outlet 451 is close to the distal end of the electrode head 41 .

In this embodiment, the liquid supply pipeline 30 communicates with the fluid channel 45 . Fluid channel 45 is used to transport fluid. The fluid channel 45 can be used to deliver the contrast agent. Since the water outlet 451 is close to the distal end of the electrode tip 41 , the position of the electrode tip 41 can be quickly and accurately positioned, thereby improving the safety of the puncture operation. In some other embodiments, the fluid channel 45 can also be used to deliver fluids such as normal saline or medicaments.

Please refer to FIG. 1 and FIGS. 3 to 6 together. FIGS. 3 to 6 are schematic structural diagrams of the electrode tip 41 and the inner sleeve 43 of the puncture needle 40 according to the first to fourth embodiments of the present invention. As shown in FIG. 3 , the sleeve 43 has an inner peripheral surface 4301 , the electrode head 41 includes a connecting surface 4101 and an exposed surface 4102 connected to the connecting surface 4101 , the connecting surface 4101 seals and connects the inner peripheral surface 4301 of the sleeve 43 , and the exposed surface 4102 A fluid channel 45 is formed around the inner peripheral surface 4301 of the sleeve 43 .

In this embodiment, the shape of the connection surface 4101 of the electrode tip 41 matches the inner peripheral surface 4301 of the sleeve 43 to increase the contact area between the electrode tip 41 and the sleeve 43, thereby increasing the contact area between the electrode tip 41 and the sleeve. 43 for the stability of the connection.

In some embodiments, as shown in FIG. 3 to FIG. 5 , the number of the water outlets 451 is multiple, and the multiple water outlets 451 are symmetrically distributed with respect to the axial center of the distal end of the electrode head 41 . In this way, when one of the water outlets 451 is blocked, the fluid can still flow out from the remaining water outlets 451, thereby reducing the risk of puncture operation, and the fluid can be more uniformly transmitted to the patient's surgical site. In addition, the symmetrical arrangement design of the water outlet 451 can also improve the visual effect, that is, a larger viewing angle is provided in the circumferential direction of the electrode head 41 to quickly and accurately locate the position of the electrode head 41, thereby improving the safety of the puncture operation. The force on the electrode tip 41 can be made more uniform, so as to improve the stability of the connection between the electrode tip 41 and the sleeve 43 . Of course, in other embodiments, the number and distribution of the water outlets 451 may also adopt other forms.

In some other embodiments, as shown in FIG. 6 , the number of the water outlet 451 is one, and the water outlet 451 is located on one side of the distal end of the electrode head 41 . In this way, the assembly of the electrode head 41 and the sleeve 43 is facilitated, and the stability of the connection between the electrode head 41 and the sleeve 43 is ensured.

Optionally, the fluid channels 45 are arranged at equal intervals along the circumference of the electrode head 41, so as to effectively improve the visual experience during use, that is, the position of the water outlet 451 can be observed from different angles, so as to quickly and accurately locate the position of the electrode head 41. position, and the fluid channel 45 can uniformly transmit the fluid to the patient's surgical site, so as to improve the stability of the positioning of the electrode tip 41 .

Referring to FIG. 3 again, in the first embodiment, the fluid channel 45 has two water outlets 451 that are opposite to each other, that is, two water outlets 451 that are opposite to each other are formed between the electrode head 41 and the sleeve 43 . The two water outlets 451 are arranged side by side with the electrode head 41 . The electrode tip 41 has a flat structure. The connecting surface 4101 is a convex arc surface, and the exposed surface 4102 is a flat surface. Each water outlet 451 is substantially semi-cylindrical.

Referring again to FIG. 4 , in the second embodiment, the fluid channel 45 has two water outlets 451 that are opposite to each other, that is, two water outlets 451 that are opposite to each other are formed between the electrode head 41 and the sleeve 43 . The two water outlets 451 are arranged side by side with the electrode head 41 . The electrode tip 41 is configured as a double concave molding structure. The connecting surface 4101 is an outer convex arc surface, and the exposed surface 4102 is an inner concave arc surface. In this way, the fluid channel 45 has a larger fluid accommodating space, can deliver more contrast agents, and increases the area of the water outlet 451 , thereby further improving the positioning effect of the electrode head 41 .

Referring to FIG. 5 again, in the third embodiment, the fluid channel 45 has four water outlets 451 opposite to each other, that is, four water outlets 451 opposite to each other are formed between the electrode head 41 and the sleeve 43 . The four water outlets 451 are arranged side by side with the electrode head 41 . The electrode tip 41 is constructed in a prismatic structure. The electrode tip 41 includes four corners 4103 . The shapes of the four corners 4103 are matched with the inner peripheral surface 4301 of the sleeve 43 to increase the contact area between the electrode tip 41 and the sleeve 43 , thereby improving the stability of the connection between the electrode tip 41 and the sleeve 43 . The connecting surface 4101 is a convex arc surface, and the exposed surface 4102 is a flat surface. In this way, based on the four water outlets 451 evenly distributed in the circumferential direction of the electrode head 41, the visual experience during use can be effectively improved, that is, the positions of the water outlets 451 can be observed from different angles to quickly and accurately locate the electrode head. 41 location. In addition, in the event that one of the water outlets 451 is blocked, the fluid can still flow out from the remaining water outlets 451, thereby reducing the risk of puncture surgery, and the fluid can be more uniformly transmitted to the patient's surgical site.

Referring to FIG. 6 again, in the fourth embodiment, the fluid channel 45 has a water outlet 451 , that is, a water outlet 451 is formed between the electrode head 41 and the sleeve 43 . A water outlet 451 is arranged side by side with the electrode head 41 . The electrode tip 41 is configured in a semi-cylindrical structure. The connecting surface 4101 is a convex arc surface, and the exposed surface 4102 is a flat surface. The exposed surface 4102 coincides with one of the symmetrical surfaces of the sleeve 43 to increase the contact area between the electrode tip 41 and the sleeve 43 , thereby improving the stability of the connection between the electrode tip 41 and the sleeve 43 . In this way, the fluid channel 45 can deliver more contrast agent, and the area of the water outlet 451 is increased to avoid clogging of the water outlet 451 , which also greatly improves the positioning effect of the electrode head 41 .

Please refer to FIG. 1 and FIG. 7 together. FIG. 7 is a schematic structural diagram of part I of the puncture needle 40 in FIG. 1 . As shown in FIG. 7 , the distal end of the electrode head 41 forms a closed flexible tip 411 , and the flexible tip 411 is configured as a smooth transition structure. In this way, the electrode tip 41 can be prevented from scratching the non-puncturing site of the operator or the patient during the puncturing operation.

Please refer to FIG. 1 , FIG. 8 and FIG. 9 together, the sectional view of the puncture system 100 shown in FIG. 8 ; FIG. As shown in FIG. 9 , the electrode head 41 has a cavity 412 , and the distal end of the cavity 412 is filled with the developing block 42 . In some embodiments, the developing block 42 is close to the distal end of the electrode tip 41 . In this way, the position of the electrode tip 41 can be further positioned during the puncture operation, so as to further improve the positioning effect of the electrode tip 41 . The material of the developing block 42 includes, but is not limited to, at least one of tantalum alloy, platinum-iridium alloy, platinum-tungsten alloy, and gold.

Referring again to FIG. 9 , in this embodiment, the proximal end of the cavity 412 is plugged with the cable 44 . The extending direction of the cavity 412 is parallel to the axial direction of the electrode tip 41 to ensure good contact performance between the cable 44 and the electrode tip 41 . The distal end of the cavity 412 forms a closed end 4121 , and the proximal end of the cavity 412 forms an open end 4123 opposite the closed end 4121 . The developing block 42 is accommodated in the sealing end 4121 of the cavity 412 . The distal end of cable 44 is inserted into cavity 412 through open end 4123 . Specifically, the cavity 412 penetrates from the proximal end of the electrode tip 41 to the proximal end of the flexible tip 411 along the axial direction of the electrode tip 41 . The proximal end of the developing block 42 may be spaced from the distal end of the cable 44 , and the proximal end of the developing block 42 may also be disposed adjacent to the distal end of the cable 44 .

The cable 44 includes a non-insulated segment 441 and an insulated segment 443 . The non-insulated section 441 means that the surface of the cable is not covered with an insulating coating or an insulating sleeve, and the insulating section 443 means that the surface of the cable is covered with an insulating coating or an insulating sleeve. The non-insulating segment 441 is accommodated in the cavity 412 and is sealed and connected to the inner side wall of the cavity 412 to realize the electrical connection between the electrode tip 41 and the cable 44, so as to transmit energy to the flexible tip 411 of the electrode tip 41, thereby realizing the puncture needle 40 Easier to puncture the atrial septum. The non-insulating segment 441 can be sealed and connected to the inner wall of the cavity 412 by welding or crimping. In this way, fluid can also be prevented from entering the cavity 412 to affect the electrical connection performance between the cable 44 and the electrode head 41, and the fluid can be completely output from the water outlet 451 of the fluid channel 45 to the surgical site, thereby improving the effect of developing positioning. The insulating segment 443 is exposed outside the cavity 412 and is accommodated in the sleeve 43 . The inner core of the insulating segment 443 is electrically connected to the radio frequency source and the non-insulating segment 441, and the outer surface of the insulating segment 443 is insulated to prevent current from being transferred into the fluid.

In some embodiments, the diameter of the non-insulating segment 441 may be smaller than the diameter of the insulating segment 443, so as to prevent the non-insulating segment 441 from being displaced, and to facilitate the insertion and positioning of the non-insulating segment 441, so as to prevent the non-insulating segment 441 from being over-inserted and pressing the developing block 42 caused by the problem of damage to the cable 44.

Referring to FIG. 2 again, the sleeve 43 includes an inner tube 431 and an outer tube 433 sleeved on the outside of the proximal end of the inner tube 431 . The inner tube 431 is sleeved on the outside of the electrode head 41 and the cable 44 .

The hardness of the inner tube 431 is less than or equal to the hardness of the outer tube 433 , so that the outer tube 433 can support and protect the inner tube 431 . In this embodiment, the hardness of the inner tube 431 and the outer tube 433 may range from, but not limited to, 62D (Shore hardness) to 72D. The material of at least one of the inner tube 431 and the outer tube 433 is, for example, but not limited to polyamide (polyamide; PA) or polyether block polyamide (PEBAX), so as to ensure that the thrust of the proximal end of the puncture needle 40 is stable. delivery, while ensuring that it has a flexible function to avoid damage to blood vessels.

In some embodiments, the distance between the distal end of the inner tube 431 and the distal end of the outer tube 433 may be 15 cm to 20 cm, which can of course be adjusted according to specific operations.

A pre-bent structure 430 is included between the distal end of the inner tube 431 and the distal end of the outer tube 433 of the puncture needle 40. The pre-bent structure 430 is a pre-shaped curved structure, or when the user manually pushes the proximal end of the puncture needle 40, the The pre-bent structure 430 of the needle 40 can be bent. In this way, the puncture needle 40 can be freely bent after entering the patient's body, so that the electrode tip 41 can be delivered to the target tissue, and the puncture needle 40 can also avoid damage to the passage of the puncture operation in the body.

Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of Embodiment 1 of part III of the puncture system 100 shown in FIG. 8 . As shown in FIG. 10 , in some embodiments, the proximal end of the inner tube 431 is flush with the proximal end of the outer tube 433 to ensure that the proximal end of the sleeve 43 has both radial and axial support forces, and Prevents the sleeve 43 from cracking caused by excessive deformation and puncturing failure caused by softening and collapse.

Please refer to FIG. 2 , FIG. 8 and FIG. 10 together. In this embodiment, the handle 10 has a connection channel 101 extending through the distal end and the proximal end of the handle 10 in the axial direction, and the connection channel 101 is connected with the fluid channel 45 and the liquid supply pipe. Road 30 runs through. Specifically, between the inner tube 431 and the cable 44, a through-fluid channel 45, the connection channel 101 and the output channel 4311 of the liquid supply pipeline 30 are formed, so as to realize the transmission of the fluid input from the liquid supply pipeline 30 to the distal end close to the electrode head 41 The water outlet 451.

In this embodiment, the outer peripheral surface of the handle 10 is further provided with a drainage channel 103 penetrating the connecting channel 101 and the liquid supply pipeline 30 . Wherein, the connection channel 101 is perpendicular to the drainage channel 103 . The distal end of the liquid supply pipeline 30 is sleeved on the proximal end of the drainage channel 103, and the liquid supply pipeline 30 is seamlessly connected with the drainage channel 103 to prevent the fluid in the liquid supply pipeline 30 from being drained from the liquid supply pipeline 30 and the drainage channel 103. The junction of channels 103 flows out.

In some other embodiments, the liquid supply pipeline can also be directly communicated with the connection channel, that is, the handle does not need to be provided with a separate drainage channel. For example, the outer peripheral surface of the handle is provided with an opening through which the liquid pipeline is inserted and communicated with the connecting channel.

In some embodiments, a valve 31 is provided on the liquid supply pipeline 30 . The valve 31 is arranged at the proximal end of the liquid supply pipeline 30 . In this embodiment, the valve 31 may be a three-way valve. For example, the first interface of the three-way valve is connected to the puncture needle 40 through the liquid supply pipeline 30; the second interface of the three-way valve is connected to the syringe through another liquid supply pipeline; the third interface of the three-way valve is connected to the syringe through another liquid supply pipeline. The three ports are connected with the negative pressure device through the negative pressure pipeline. In some other embodiments, the valve 31 may also be a one-way valve, a two-way valve or other multi-way valve. It should be noted that the number of ports of the valve 31 can be designed according to the needs of the puncture operation, which is not specifically limited in the present invention. In some embodiments, the valve 31 can be arranged on the liquid supply device, that is, the valve 31 may not be arranged on the liquid supply device. on the liquid supply line 30.

As shown in FIG. 10 , in this embodiment, the puncturing system 100 further includes a locking member 23 . A lock 23 is located at the proximal end of the handle 10 for locking the cable 44 . The proximal end of the cable 44 can be electrically connected to the connection connector 20 for an external energy generator by abutting the connection cable 21, so that the energy generator and the electrode head 41 are electrically connected, and the connection between the cable 44 and the connection cable 21 can be avoided. The sliding leads to the problem of poor contact between the connecting cable 21 and the cable 44 , thereby improving the connection stability between the energy generator and the electrode head 41 . The energy generator is used to generate ablation energy such as radio frequency. An energy generator, such as, but not limited to, one of a radio frequency generator, a pulse generator, or a combination thereof. The connecting cable 21 and the cable 44 are used to transmit the radiofrequency ablation energy generated by the energy generator to the electrode tip 41 . Specifically, the energy generator is electrically connected to the connection cable 21 through the connection joint 20 , so that the ablation energy generated by the energy generator can be transmitted to the electrode head 41 . As such, by arranging the connecting cable 21 between the connecting connector 20 and the cable 44, the assembly of the various elements of the puncture system 100 is facilitated.

In some embodiments, the puncturing system 100 may not include a connecting cable, ie, the proximal end of the cable 44 may be directly connected to the connecting adapter 20 or the energy generator.

The locking piece 23 penetrates the proximal end of the handle 10 in the axial direction, and is sealedly connected with the handle 10, so that the proximal end of the connection channel 101 forms a blocking end, so as to prevent the fluid in the connection channel 101 from flowing out from the proximal end of the handle 10, And make the fluid flow axially to the output channel 4311 along the connecting channel 101 , and output from the water outlet 451 of the fluid channel 45 .

In this embodiment, the locking member 23 is inserted into the proximal end of the connection channel 101 of the handle 10 in the axial direction. The locking member 23 is detachably and fixedly connected to the handle 10 . Specifically, the outer surface of the locking member 23 is provided with an external thread 2301, and the inner wall of the proximal end of the connection channel 101 is provided with an internal thread 1011 matched with the external thread 2301, so as to realize the fixed connection between the locking member 23 and the handle 10, and avoid Fluid within the connecting channel 101 flows to the proximal end of the handle 10 .

It can be understood that, in other embodiments, the locking member 23 and the handle 10 can also be fixed by means of bonding, snapping, magnetic adsorption, or the like.

In this embodiment, the locking member 23 is a hollow structure. The distal end of the locking member 23 is provided with a collet 231 for passing through and fastening the cable 44 . The collet 231 has elasticity. The locking member 23 can be moved relative to the handle 10 through screw rotation. When the locking member 23 moves from the proximal end of the handle 10 to the distal direction, the collet 231 gradually clamps the cable 44; when the locking member 23 moves from the distal end of the handle 10 to the proximal direction, the collet 231 gradually releases the cable 44. The collet 231 is generally conical in shape, and the shape of the proximal end of the connection channel 101 matches the shape of the collet 231 .

The chuck 231 defines a first slot 2311 along the axial direction. When the collet 231 is in the released state, the diameter of the first clamping slot 2311 is greater than or equal to the diameter of the cable 44 , so that the cable 44 can be inserted into the locking member 23 or taken out from the locking member 23 . When the collet 231 is in the clamped state, the cable 44 is accommodated in the first clamping slot 2311 . Wherein, in some embodiments, the collet 231 may be configured as an elastic clamping jaw, such as a double-claw collet, a three-claw collet or a multi-claw collet. In other embodiments, the collet 231 can also be an elastic collet. In some other embodiments, the proximal end of the first clamping slot 2311 is provided with an inner thread, and the cable 44 is correspondingly provided with an outer thread matching the inner thread of the first clamping slot 2311 .

The proximal end of the locking piece 23 is provided with an operation block 233 for connecting the cable 21 and the cable 44 . The operation block 233 defines a second card slot 2331 that communicates with the first card slot 2311 in the axial direction. The connecting cable 44 abuts the cable 21 through the first card slot 2311 and the second card slot 2331 .

A limiting portion 237 is provided at the intersection of the first card slot 2311 and the second card slot 2331 for limiting the cable 44 to a preset position of the locking member 23 . When the locking member 23 is fixed on the handle 10 , the cable 44 is located in the first locking groove 2311 and the second locking groove 2331 , and is sealed and snapped with the limiting portion 237 to prevent fluid from flowing out of the proximal end of the locking member 23 .

In some embodiments, a reserved space 239 is provided at the proximal end of the first clamping slot 2311 , so that the clip 231 can be more easily squeezed inward to fix the cable 44 . The reserved space 239 includes, but is not limited to, a cylindrical structure, a hollow spherical structure, and the like. At the same time, the locking member 23 can collect the fluid leaking from the connection channel 101 to the proximal end of the first snap groove 2311 through the reserved space 239 to prevent the fluid from flowing out of the proximal end of the locking member 23 . In some embodiments, a filler may also be provided between the cable 44 and the distal end of the locking member 23 to prevent fluid in the connecting channel 101 from flowing out of the proximal end of the locking member 23 . In addition, the design of the reserved space 239 can also provide sufficient operating space when the cable 44 is inserted into the locking member 23 , so as to facilitate the assembly of the cable 44 and the locking member 23 .

In this embodiment, the sleeve 43 is threaded axially into the center of the distal end of the handle 10 . The central axis of the output channel 4311 is collinear with the central axis of the connecting channel 101 , so that the fluid can flow to the output channel 4311 through the connecting channel 101 more smoothly. The proximal end of the sleeve 43 is seamlessly connected to the distal end of the handle 10 . The puncture system 100 also includes a mounting structure 13 connecting the handle 10 and the cannula 43 . The distal end of the handle 10 has a connecting portion 12 extending in the axial direction. The installation structure 13 is sleeved on the outer side of the outer tube 433 , and the sleeve 43 is fixed with the connection portion 12 of the handle 10 through the installation structure 13 . In some embodiments, the mounting structure 13 and the connecting portion 12 are fixed together by means of snap fit. In other embodiments, the mounting structure 13 and the connecting portion 12 may also be fixed together by mutual cooperation through screw locking or the like. In this way, the problem of poor contact between the distal end of the cable 44 and the proximal end of the electrode head 41 and/or the cable 44 and the connecting cable 21 due to the sliding of the sleeve 43 can be avoided, thereby improving the connection between the connecting joint 20 and the electrode head 41 stability.

During operation, the electrode head 41 of the puncture needle 40 is introduced into the body of the patient, and the position of the electrode head 41 is determined through the contrast agent discharged from the water outlet 451 and/or the development site of the development block 42 . After it is determined that the electrode tip 41 is close to the atrial septum, the energy generator is turned on, and the electrode tip 41 is aligned with the target position to start ablation and puncture. Cross the interatrial septum to the left atrium. After it is determined that the imaging site on the electrode tip 41 passes through the interatrial septum and reaches the left atrium, the energy generator is disconnected, the entire puncture system 100 is withdrawn, and the puncture process is completed.

Please refer to FIG. 11 . FIG. 11 is a schematic structural diagram of the second embodiment of the III part of the puncture system in FIG. 8 . The structure of the III part in the second embodiment is similar to the structure of the III part in the first embodiment. The difference is that in the second embodiment, the locking member 23 includes a first locking member 232 , a second locking member 234 and a connecting member 236 connecting the first locking member 232 and the second locking member 234 . The first locking member 232 and the second locking member 234 are engaged with each other. The connecting member 236 is disposed at the proximal ends of the first locking member 232 and the second locking member 234 . The first locking member 232 and the second locking member 234 together define a locking slot 238 having a limiting portion 237 . The cable 44 is located between the first lock 232 and the second lock 234 . The cable 44 is located in the clamping slot 238 and is clamped with the limiting portion 237, so as to avoid the problem of poor contact between the distal end of the cable 44 and the proximal end of the electrode head 41 and/or the connecting cable 21 and the cable 44 caused by the sliding of the cable 44, Further, the connection stability between the connection joint 20 and the electrode head 41 is improved, so as to improve the success rate of the puncture operation. In some embodiments, the connector 236 may also be omitted.

Specifically, in this embodiment, the card slot 238 includes a first card slot 2381 and a second card slot 2383 . The first card slot 2381 is disposed at the distal end of the locking member 23 , and the second card groove 2383 is disposed at the proximal end of the locking member 23 . A substantially inverted conical limiting portion 237 is formed at the connection between the first card slot 2381 and the second card slot 2383 . When the first locking member 232 is engaged with the second locking member 234 , the cable 44 is seamlessly connected with the limiting portion 237 , so that the first locking groove 2381 and the second locking groove 2383 are isolated from each other, thereby preventing the connection channel 101 from being damaged. Fluid flows out of the proximal end of the locking member 23 and causes the fluid to flow axially along the connecting channel 101 to the output channel 4311 . When the first locking member 232 and the second locking member 234 are opened, the cable 44 passes through the first locking slot 2381 and the second locking slot 2383 in sequence, and is engaged with the limiting portion 237 . The diameter of the first clamping slot 2381 is larger than or equal to the diameter of the cable 44 , and the diameter of the second clamping slot 2383 is larger than the diameter of the cable 44 . The first card slot 2381 is substantially tapered, and the diameter of the proximal end of the first card slot 2381 is equal to the diameter of the cable 44, so that the cable 44 can penetrate into the locking member 23, and the first card slot 2381 and the second card slot 2383 They are isolated from each other so that the fluid in the connecting channel 101 can be prevented from flowing out of the proximal end of the locking member 23 .

In some embodiments, a reserved space 239 is provided at the distal end of the locking slot 238 near the limiting portion 237 , so that the first locking member 232 and the second locking member 234 are more easily squeezed inward to fix the cable 44 . The reserved space 239 includes, but is not limited to, a cylindrical structure, a hollow spherical structure, and the like. At the same time, the locking member 23 can collect the fluid leaking from the connection channel 101 to the proximal end of the first snap groove 2381 through the reserved space 239 to prevent the fluid from flowing out of the proximal end of the locking member 23 . In some embodiments, a filler may also be provided between the cable 44 and the distal end of the locking member 23 to prevent fluid in the connecting channel 101 from flowing out of the proximal end of the locking member 23 . In addition, the design of the reserved space 239 can also provide sufficient operating space when the cable 44 is inserted into the locking member 23 , so as to facilitate the assembly of the cable 44 and the locking member 23 .

The connecting piece 236 defines an opening 2361 in the axial direction for the cable 44 or the connecting cable 21 to pass through. The diameter of the opening 2361 is equal to the diameter of the cable 44 or connecting cable 21 so that the cable 44 or connecting cable 21 can seal the opening 2361 of the locking member 23 to prevent fluid in the connecting channel 101 from flowing out of the proximal end of the locking member 23 .

Please refer to FIG. 12 , which is a schematic structural diagram of a second embodiment of the puncture system 200 provided by the present invention. In the second embodiment, the structure of the puncture system 200 is similar to that of the puncture system 100 of the first embodiment. The difference is that the inside of the handle 10a is provided with a bending track 15 for accommodating the cable 44, and the proximal end of the handle 10a is not provided with the locking member 23.

In some embodiments, the bend track 15 is isolated from the connecting channel 101 to prevent fluid in the connecting channel 101 from flowing out of the proximal end of the handle 10 . In other embodiments, the bending track 15 communicates with the connecting channel 101 , and the proximal end of the bending track 15 forms a blocking structure, which can also prevent the fluid in the connecting channel 101 from flowing out of the proximal end of the handle 10 . In some embodiments, the proximal end of the handle 10 is sealed to prevent the fluid in the connecting channel 101 from flowing out of the proximal end of the handle 10 .

Therein, the cable 44 is bent several times along the bending track 15 . In this embodiment, the bending track 15 is bent multiple times along the axial and radial directions of the handle 10 . In this way, the frictional force between the cable 44 and the bending track 15 can limit the cable 44 in the bending track 15, which can avoid the distance between the distal end of the cable 44 and the electrode head 41 caused by the sliding of the cable 44. The problem of poor contact between the end and/or the connecting cable 21 and the cable 44, thereby improving the connection stability of the connecting connector 20 and the electrode head 41, so as to improve the success rate of the puncture operation.

In the present embodiment, the connecting cable 21 is axially inserted into the proximal end of the handle 10a, and is sealedly connected with the handle 10a. In some embodiments, the cable 44 passes through the handle 10a and is electrically connected to the energy generator through the connection connector 20, and the cable 44 is sealingly connected to the handle 10a. In this way, fluid in the connection channel 101 can be prevented from flowing out of the proximal end of the handle 10a.

In some embodiments, the bend track 15 includes a first sub-bend track 151 and a second sub-bend track 153 that communicate with each other. The first sub-bending rails 151 and the second sub-bending rails 153 are alternately connected, and the extending direction of the first sub-bending rails 151 is different from the extending direction of the second sub-bending rails 153 . For example, the extending direction of the first sub-bending rail 151 is perpendicular to the extending direction of the second sub-bending rail 153 . In this way, the design of the bending track 15 can increase the frictional force between the cable 44 and the bending track 15, so that the bending track 15 can limit the cable 44 in the bending track 15 to avoid the cable 44 The problem of poor contact between the distal end of the cable 44 and the proximal end of the electrode head 41 and/or the connecting cable 21 and the cable 44 caused by the sliding of the cable 44, thereby improving the connection stability of the connecting joint 20 and the electrode head 41, so as to improve the puncture operation. Success rate.

It should be noted that the number of the first sub-bending rails 151 and the second sub-bending rails 153 can be set according to the shape and size of the handle 10 , which is not specifically limited in this application. The bending track 15 may further include three or more sub-bending tracks with different extension directions, which are not specifically limited in this application.

The invention discloses a puncture needle and a puncture system. The puncture needle includes an electrode head and a sleeve sleeved with the electrode head, and the electrode head is partially accommodated in the sleeve, so that the distal end of the electrode head is exposed outside the sleeve, and the electrode head is partially accommodated in the sleeve. A fluid channel is formed between the head and the sleeve, the fluid channel includes at least one water outlet, and the at least one water outlet is close to the distal end of the electrode head, based on arranging the at least one water outlet of the fluid channel close to the electrode The distal end of the electrode head can be positioned quickly and accurately, thereby improving the safety of the puncture operation.

The embodiments of the present invention have been introduced in detail above, and specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; at the same time, for Persons of ordinary skill in the art, according to the idea of the present invention, will have changes in the specific embodiments and application scope. To sum up, the content of this description should not be construed as a limitation of the present invention.

Claims (18)

A puncture needle, characterized in that it comprises an electrode tip and a sleeve sleeved over the electrode tip, the electrode tip is partially accommodated in the sleeve, so that the distal end of the electrode tip is exposed to the sleeve In addition, a fluid channel is formed between the electrode tip and the sleeve, and the fluid channel includes at least one water outlet, and the at least one water outlet is close to the distal end of the electrode tip. The puncture needle according to claim 1, wherein the sleeve has an inner peripheral surface, the electrode head includes a connection surface and an exposed surface connected with the connection surface, and the connection surface is sealed and connected to the sleeve The inner peripheral surface of the tube, the exposed surface and the inner peripheral surface of the sleeve are arranged to form the fluid channel. The puncture needle according to claim 2, wherein the number of the water outlet is one, and the water outlet is located on one side of the distal end of the electrode head; or the number of the water outlet is multiple, The plurality of water outlets are symmetrically distributed with respect to the axial center of the distal end of the electrode tip. The puncture needle of claim 1, wherein the distal end of the electrode tip forms a closed flexible tip, and the flexible tip is configured as a smooth transition structure. The puncture needle according to claim 1, wherein the electrode head has a cavity, the distal end of the cavity is filled with a developing block, and the proximal end of the cavity is plugged with a cable. The puncture needle according to claim 5, wherein the cable comprises an insulating section and a non-insulating section, the non-insulating section is accommodated in the cavity and is sealedly connected to the inner wall of the cavity; The insulating section is exposed outside the cavity and is accommodated in the sleeve. The puncture needle according to claim 5, wherein the cannula comprises an inner tube and an outer tube sleeved on the outer side of the proximal end of the inner tube, and the inner tube is sleeved on the electrode head and the on the outside of the cable. The puncture needle of claim 7, wherein a pre-bent structure is included between the distal end of the inner tube and the distal end of the outer tube. A puncture system, characterized in that it comprises a handle, a liquid supply pipeline, and the puncture needle according to any one of claims 1-8, wherein the distal end of the handle is fixedly connected to the proximal end of the puncture needle, and the The middle part of the handle is fixedly connected with the liquid supply pipeline, and the liquid supply pipeline communicates with the fluid channel; the proximal end of the handle is connected to an external energy generator. The puncture system according to claim 9, wherein the handle is provided with a connection channel extending through the distal end and the proximal end of the handle in the axial direction, and the connection channel is connected with the fluid channel and the liquid supply tube. The road is connected. A puncture system, characterized in that it comprises a handle, a liquid supply pipeline, and the puncture needle according to any one of claims 5-8, wherein the distal end of the handle is fixedly connected to the proximal end of the puncture needle, so that the The middle part of the handle is fixedly connected with the liquid supply pipeline, and the liquid supply pipeline communicates with the fluid channel; the proximal end of the handle is connected to an external energy generator. The puncture system according to claim 11, wherein the handle is provided with a connection channel extending through the distal end and the proximal end of the handle in the axial direction, and the connection channel is connected with the fluid channel and the liquid supply tube. The road is connected. The puncture system according to claim 12, wherein the puncture system further comprises a locking member, the locking member axially penetrates the proximal end of the connecting channel and is sealedly connected with the handle, the A lock is used to lock the cable. The puncture system according to claim 13, wherein the locking member is detachably and fixedly connected to the handle, the outer surface of the locking member is provided with an external thread, and the inner wall of the proximal end of the connection channel is provided with There are internal threads matched with the external threads. The puncture system according to claim 13, wherein the distal end of the locking member is provided with a clip for penetrating and tightening the cable, and the clip has elasticity; when the locking member is removed from the When the proximal end of the handle moves toward the distal end, the collet gradually clamps the cable; when the locking piece moves from the distal end of the handle toward the proximal end, the collet gradually releases the cable. The puncture system according to claim 15, wherein the locking member defines a first locking groove and a second locking groove in the axial direction, and the intersection of the first locking groove and the second locking groove is limited in setting When the locking member is fixed on the handle, the cable is located in the first card slot and the second card slot, and the cable is seamlessly connected with the limit portion, so that the The first card slot and the second card slot are isolated from each other. The puncture system according to claim 11, wherein a bending track for accommodating the cable is provided inside the handle, and the cable is bent multiple times along the bending track. 18. The puncture system of claim 17, wherein the bend track comprises a first sub-bend track and a second sub-bend track that communicate with each other, the first sub-bend track and the second sub-bend track The sub-bending rails are alternately connected and arranged, and the extension direction of the first sub-bending rail is different from the extending direction of the second sub-bending rail.

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