CN119214781A

CN119214781A - Composite ablation forceps and ablation system

Info

Publication number: CN119214781A
Application number: CN202411729912.2A
Authority: CN
Inventors: 杜泽奎; 江荣华; 肖剑; 杨晶晶; 罗富良; 黄乾富
Original assignee: Hygea Medical Technology Co Ltd
Current assignee: Hygea Medical Technology Co Ltd
Priority date: 2024-11-28
Filing date: 2024-11-28
Publication date: 2024-12-31

Abstract

The invention relates to a compound type ablation forceps and an ablation system, and relates to the technical field of ablation. The invention relates to a compound type ablation forceps which comprises a clamping part, a holding part and a transmission part. Because the transmission component can transmit energy to the freezing fluid inflow and return component and/or the electrode, the distal end side of the first jaw component and/or the distal end side of the second jaw component can perform corresponding ablation operation, so that different ablation strategies can be determined according to the focus, thereby not only avoiding injuring normal tissues by mistake, but also ensuring more thorough ablation treatment.

Description

Combined type ablation forceps and ablation system

Technical Field

The invention relates to the technical field of ablation, in particular to a composite type ablation forceps and an ablation system.

Background

Atrial fibrillation is the most common sustained arrhythmia, the atrial activation frequency reaches 300-600 times/min during atrial fibrillation, the heartbeat frequency is often rapid and irregular, sometimes can reach 100-160 times/min, the atrial fibrillation is much faster than that of normal people, the atrial fibrillation is absolutely irregular, and the atrium loses effective contractile function.

At present, abnormal myocardial tissue is generally clamped by using a jaw of an ablation forceps, and freezing energy, radio frequency energy or pulse electric field energy is released to the myocardial tissue, so that abnormal myocardial tissue cells at the jaw are destroyed, or irreversible electroporation is generated on a cell membrane, so that cell apoptosis is finally caused. However, the existing ablation forceps are limited by the structure, and generally only can release single energy, namely only can perform cryoablation, radiofrequency ablation or pulsed electric field ablation independently, and the problem of incomplete ablation possibly exists for lesions with large areas and sensitive areas.

Disclosure of Invention

The invention provides a compound type ablation forceps and an ablation system, which are used for solving at least one technical problem.

The invention provides a compound ablation forceps, which comprises a clamping part, a holding part and a transmission part, wherein the clamping part is provided with a plurality of grooves;

The clamping member includes a first jaw assembly and a second jaw assembly, one of the first jaw assembly and the second jaw assembly being capable of performing an operation that moves relative to the other to change a closing gap between a distal side of the first jaw assembly and a distal side of the second jaw assembly;

A proximal side of the first jaw assembly and a proximal side of the second jaw assembly extend into the gripping member, one or both of the first jaw assembly and the second jaw assembly having an electrode and/or a chilled fluid return assembly disposed therein, the electrode in electrically conductive connection with the transmission member, the chilled fluid return assembly in fluid communication with the transmission member;

The transmission component is capable of performing one or more of the following operations:

delivering refrigeration energy to the chilled fluid intake return assembly;

delivering thermal energy to the electrode;

delivering pulsed electric field energy to the electrode;

Such that the distal side of the first jaw assembly and/or the distal side of the second jaw assembly is capable of performing one of, or a plurality of simultaneous ones, of cryoablation, radiofrequency ablation, and pulsed electric field ablation in sequence.

In one embodiment, the first jaw assembly comprises a first jaw and a first electrode holder connected with the first jaw, the second jaw assembly comprises a second jaw and a second electrode holder connected with the second jaw, and the electrodes comprise a first electrode positioned in the first electrode holder and a second electrode positioned in the second electrode holder;

the creepage distance between the first jaw and the first electrode is larger than the electric gap between the first jaw and the first electrode, and/or

The creepage distance between the second jaw and the second electrode is greater than the electrical clearance between the two.

In one embodiment, the first jaw is connected to the first electrode mount by one or more of:

The first electrode holder is integrally positioned in the first jaw;

A portion of the first electrode mount is located in the first jaw;

a portion of the first jaw is located in the first electrode mount;

When the whole or a part of the first electrode holder is positioned in the first jaw, one or more insulation grooves are formed in the first electrode holder, and each insulation groove extends from the end part of the first electrode holder in the direction towards the first jaw.

In one embodiment, the first jaw assembly or the second jaw assembly comprises a chilled fluid intake and return assembly comprising:

A core tube defining an inlet flow passage in fluid communication with the transfer member to perform an operation of delivering an inlet flow fluid;

An insulated inner tube located outside the core tube, an inner wall of the insulated inner tube and an outer wall of the core tube defining a first return passage in fluid communication with the transfer member to perform a return fluid conveying operation;

An insulated outer tube outside the insulated inner tube, and

A cryoprobe outer tube connected to the distal sides of the insulated inner tube and insulated outer tube, the distal side of the core tube extending into the cryoprobe outer tube, the outer wall of the core tube and the inner wall of the cryoprobe outer tube defining a second backflow passage in fluid communication with the inlet flow passage.

In one embodiment, the first jaw assembly further comprises an outer tube fixedly connected to the first jaw and the gripping member, respectively, and an insulating sleeve extending through the outer tube, the insulating outer tube being disposed in the insulating sleeve;

the second jaw assembly further comprises an inner tube arranged in the outer tube, the insulation sleeve penetrates through the inner tube, wherein the distal end side of the inner tube is connected with the second jaw, the proximal end side of the inner tube stretches into the holding part, and the inner tube can perform an operation of moving along the axis of the inner tube relative to the outer tube.

In one embodiment, a receiving groove is provided between the first electrode and the first electrode holder and/or between the second electrode and the second electrode holder, and the cryoprobe outer tube is located in the receiving groove.

In one embodiment, further comprising a distance detection device for detecting a size of the closed gap, the distance detection device comprising:

a scale layer located on a sidewall of one of the first jaw assembly and the second jaw assembly;

a distance sensor located inside the gripping member at a position corresponding to a proximal end side of one of the first jaw assembly and the second jaw assembly, or

A slide rheostat located inside the gripping member and connected to a proximal side of the movable one of the first and second jaw assemblies.

In one embodiment, one or more of the first electrode holder, the second electrode holder, the first electrode and the second electrode are provided with a pressure sensor and/or a liquid injection hole.

In one embodiment, a movement driving assembly is provided in the gripping member, and is used for driving the first jaw assembly or the second jaw assembly to perform a movement operation;

the movement driving assembly includes:

a pushing part connected with the proximal end side of the first jaw assembly or the proximal end side of the second jaw assembly, wherein at least two clamping grooves are arranged on the pushing part, and

And the locking part is connected with the holding part and is provided with a clamping protrusion which is clamped with the clamping groove.

In one embodiment, the pushing portion is rotatably or movably connected to the gripping member and, upon rotation or movement of the pushing portion relative to the gripping member, moves the first jaw assembly or the second jaw assembly to change the closing gap on the distal side of both.

In one embodiment, the locking part is rotatably or movably connected with the holding part, and when the locking part rotates or moves relative to the holding part, the locking part performs an operation of being engaged with a corresponding clamping groove on the pushing part or an operation of being separated from the corresponding clamping groove on the pushing part.

According to a second aspect of the present invention, there is provided an ablation system comprising a composite ablation forceps as described above, and further comprising an energy source, the energy source being coupled to the delivery member.

Compared with the prior art, the invention has the advantages that as the transmission component can transmit energy to the freezing fluid inflow and return component and/or the electrode, the distal end side of the first jaw component and/or the distal end side of the second jaw component can perform corresponding ablation operation, so that different ablation strategies can be determined according to the focus, thereby not only avoiding injuring normal tissues by mistake, but also ensuring more thorough ablation treatment.

The scales, the position sensors and the pressure sensors are added, so that an operator can more intuitively observe the clamping condition of the ablation tissue, the subjective experience judgment of doctors is reduced, and the operation experience and operation accuracy of the operator are improved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a composite ablation forceps in embodiment 1 of the invention;

FIG. 2 is an exploded view of a first jaw assembly and a second jaw assembly of embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view of a composite ablation forceps in accordance with embodiment 1 of the invention;

Fig. 4 is a schematic perspective view of a first electrode in embodiment 1 of the present invention;

FIG. 5 is a cross-sectional view of FIG. 4 at A-A;

FIG. 6a is a cross-sectional view of the first and second jaw assemblies of FIG. 1;

FIG. 6b is a cross-sectional view of a first jaw assembly and a second jaw assembly in another embodiment of the invention;

FIG. 7a is a schematic view of the grip member shown in FIG. 3, with the latch in an unlocked state;

FIG. 7B is an enlarged view of FIG. 7a at B;

FIG. 7c is a schematic view of the structure of the engaging protrusion and boss according to the embodiment of the present invention;

FIG. 8a is a schematic view of the structure of the first jaw with a scale layer according to embodiment 1 of the present invention;

Fig. 8b is a schematic view showing a structure in which a distance sensor is provided in a grip member in embodiment 1 of the present invention, wherein a lock portion is in a locked state;

FIG. 8C is an enlarged view of FIG. 8b at C;

Fig. 8d is a schematic structural view of the holding member of embodiment 1 of the present invention with the slide rheostat provided therein, wherein the locking portion is in an unlocked state;

FIG. 8e is an enlarged view of FIG. 8D at D;

FIG. 9a is a schematic diagram of the structure of the second electrode of embodiment 1 of the present invention with a pressure sensor on top;

FIG. 9b is a schematic view showing a structure in which a pressure sensor is provided at the bottom of the second electrode in embodiment 1 of the present invention;

Fig. 9c is a schematic diagram of the structure of the second electrode holder of embodiment 1 of the present invention with a pressure sensor disposed at the bottom;

FIGS. 10a, 10b and 10c are schematic views showing the connection structure of the first jaw and the first electrode holder in embodiment 1 of the present invention;

FIG. 11 is a schematic view showing the structure of the first electrode provided with the liquid injection hole in embodiment 1 of the present invention;

fig. 12 is a schematic view of the structure of the first electrode holder of embodiment 1 of the present invention with the liquid injection hole;

Fig. 13 is a schematic perspective view of a composite ablation forceps in embodiment 2 of the invention;

fig. 14 is a schematic view showing the configuration of the cooperation of the pushing portion and the locking portion in embodiment 2 of the present invention;

fig. 15 is a schematic structural view of a lock portion in embodiment 2 of the present invention;

Fig. 16 is a schematic structural view of an unlock button in embodiment 2 of the present invention.

Reference numerals:

100. A clamping member; 200 parts of holding, 300 parts of transmission, 400 parts of moving driving components, 500 parts of distance detection devices;

110. First jaw assembly, 120, second jaw assembly, 130, electrode, 140, freezing fluid inlet and return assembly;

101. First jaw, 102, first electrode holder, 103, outer tube, 104, pressure sensor, 105, insulating sleeve, 106, inner tube, 107, second jaw, 108, second electrode holder, 109, liquid injection hole;

1011. 1012, first holding section 1013, moving groove;

1071. 1072, a second receiving section;

1021. an insulation groove;

131. electrode, 131, first electrode, 132, second electrode, 133, accommodation groove;

141. Core pipe 142, heat insulating inner pipe 143, heat insulating outer pipe 144, freezing probe outer pipe 145, heat insulating connecting piece 146 and plugging piece;

210. A right housing 220, a left housing;

211. the first limit rib; 212, second limit ribs 213, a supporting seat;

301. Conveying pipelines, 302, connectors, 303, wires, 304 and plugs;

410. pushing part 411, clamping groove 412, connecting rod 413, slider 414, second pin, 415, trigger 416, sixth pin, 417, boss 418, third pin, 419, fourth pin;

420. Locking part 421, locking protrusion 422, locking rod 423, locking button 424, first pin shaft 425, fifth pin shaft 426, locking part reset element;

4221. Wedge-shaped boss;

4261. 4262, the second connecting column;

430. a jaw reset element;

440. the pushing part reset element 441, the first tension spring 442, the first connecting column;

4101. 4102, connecting grooves, 4103, saw tooth structure, 4104, push buttons;

510. scale layer, 520, distance sensor, 530, slide rheostat.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

According to a first aspect of the present invention, as shown in fig. 1, the present invention provides a composite ablation forceps including a clamping member 100, a gripping member 200, and a delivery member 300.

Wherein the distal side of the clamping member 100 is capable of clamping a diseased tissue or area and performing a corresponding ablation operation as desired. In particular, the clamping member 100 includes a first jaw assembly 110 and a second jaw assembly 120, one of the first jaw assembly 110 and the second jaw assembly 120 being capable of performing an operation that moves relative to the other to vary a closing gap between a distal side of the first jaw assembly 110 and a distal side of the second jaw assembly 120, different closing gaps between the distal sides of the first jaw assembly 110 and the second jaw assembly 120 being capable of being targeted at different ablation sites. In particular, the clamping member 100 is suitable for an ablation operation for myocardial tissue, and since the thicknesses of the myocardial tissue of different patients (such as the thicknesses of the myocardial tissue of different ages are obviously different), the myocardial tissue with different thicknesses can be clamped with uniform force by changing the closing gap, so that the conditions of insufficient ablation caused by too small closing gap and too large closing gap can be avoided.

As shown in fig. 1 and 3, the proximal side of the gripping member 100 protrudes into the gripping member 200 from one side of the gripping member 200, and the transmission member 300 protrudes into the gripping member 200 from the other side of the gripping member 200, so that the proximal side of the gripping member 100 can be connected to the transmission member 300. The delivery member 300 can deliver various ablative energies, such as cryoenergy, thermal energy, pulsed electric field energy, etc., to the clamping member 100 so that the distal side of the clamping member 100 can perform corresponding ablative actions on diseased tissue or areas as desired.

Specifically, as shown in fig. 2 and 3, a proximal side of the first jaw assembly 110 and a proximal side of the second jaw assembly 120 extend into the gripping member 200, an electrode 130 and/or a chilled fluid return assembly 140 is disposed in one or both of the first jaw assembly 110 and the second jaw assembly 120, the electrode 130 is electrically connected to the transmission member 300, and the chilled fluid return assembly 140 is in fluid communication with the transmission member 300.

Optionally, the transmission member 300 can deliver cryogenic energy to the cryogenic fluid inlet and return assembly 140 and/or the transmission member 300 can deliver one or both of thermal energy and pulsed electric field energy to the electrode 130 such that the distal side of the first jaw assembly 110 and/or the distal side of the second jaw assembly 120 can sequentially perform one of a cryoablation, a radio frequency ablation, and a pulsed electric field ablation. For example, the distal side of the first jaw assembly 110 and/or the distal side of the second jaw assembly 120 can sequentially perform cryoablation, radiofrequency ablation, and pulsed electric field ablation.

Optionally, the transmission member 300 can deliver cryogenic energy to the cryogenic fluid inlet-return assembly 140 and/or the transmission member 300 can deliver one or both of thermal energy and pulsed electric field energy to the electrode 130 such that the distal side of the first jaw assembly 110 and/or the distal side of the second jaw assembly 120 can simultaneously perform multiple ones of the cryoablation, radiofrequency ablation, and pulsed electric field ablation. For example, the distal side of the first jaw assembly 110 and/or the distal side of the second jaw assembly 120 can perform both cryoablation and pulsed electric field ablation simultaneously, or the distal side of the first jaw assembly 110 and/or the distal side of the second jaw assembly 120 can perform both radiofrequency ablation and pulsed electric field ablation simultaneously.

When the transmission member 300 inputs cold working fluid (e.g., liquid nitrogen or cooling water, liquid metal, etc.) into the return flow assembly 140 into the first jaw assembly 110 or the second jaw assembly 120, the cold working fluid may flow to the distal side of the first jaw assembly 110 or the distal side of the second jaw assembly 120 to perform cryoablation operation on a lesion tissue or region, when the transmission member 300 inputs rf energy into the electrodes 130 in the first jaw assembly 110 and the second jaw assembly 120, one of the distal side of the first jaw assembly 110 and the distal side of the second jaw assembly 120 serves as a positive electrode and the other serves as a negative electrode to form a discharge loop to release the rf energy, and when the transmission member 300 inputs pulse energy into the electrodes 130 in the first jaw assembly 110 and the second jaw assembly 120, the distal side of the first jaw assembly 110 and the distal side of the second jaw assembly 120 respectively form an electrode pair to perform pulse discharge to release the pulse energy.

It will be appreciated that the delivery member 300 can deliver one energy, or two or more energies, such that the distal side of the first jaw assembly 110 and the distal side of the second jaw assembly 120 can release a single energy, or multiple combinations of energies, such as during rf ablation, cooling water can be simultaneously input into the cryogenic fluid inlet and return assembly 140, thereby avoiding overheating of surrounding tissue of the lesion and cooling the clamping member 100.

As shown in fig. 2, the first jaw assembly 110 or the second jaw assembly 120 is configured with a refrigerating fluid inlet/return assembly 140, and more specifically, the refrigerating fluid inlet/return assembly 140 is configured on the relatively fixed one of the first jaw assembly 110 and the second jaw assembly 120, so as to avoid leakage of the refrigerating fluid caused by compression or stretching of the refrigerating fluid inlet/return assembly 140 when the corresponding jaw assembly is moved.

For example, the second jaw assembly 120 may be axially movable relative to the first jaw assembly 110 such that the chilled fluid return assembly 140 may be configured in the first jaw assembly 110. As shown in fig. 2,4 and 5, the cryoprobe inlet and return assembly 140 includes a core tube 141, an insulated inner tube 142, an insulated outer tube 143 and a cryoprobe outer tube 144.

As shown in fig. 4 and 5, the core tube 141 defines an inflow path that is in fluid communication with the transmission member 300 to perform an operation of delivering an inflow fluid. The heat insulating inner pipe 142 is located outside the core pipe 141, and an inner wall of the heat insulating inner pipe 142 and an outer wall of the core pipe 141 define a first return path in fluid communication with the transfer member 300 to perform an operation of transferring a return fluid. The heat insulating outer pipe 143 is located outside the heat insulating inner pipe 142. It will thus be appreciated that the chilled fluid intake and return assembly 140 is a core tube 141, an insulated inner tube 142, and an insulated outer tube 143, which are disposed in sequence from the inside to the outside.

As shown in fig. 4, one ends of the heat insulating outer pipe 143 and the heat insulating inner pipe 142 are fixed with a heat insulating connecting member 145, a vacuum pumping process is performed between the heat insulating outer pipe 143 and the heat insulating inner pipe 142, and after the vacuum pumping process is completed, one ends of the heat insulating outer pipe 143 and the heat insulating inner pipe 142, which are far from the heat insulating connecting member 145, are plugged with glass solder in the process of completing the vacuum pumping process. Therefore, it is understood that a vacuum insulation layer is formed between the heat insulation outer pipe 143 and the heat insulation inner pipe 142.

The cryoprobe outer tube 144 is connected to the distal sides of the insulated inner tube 142 and the insulated outer tube 143 with an insulated connection 145 and is in fluid communication with the insulated inner tube 142 via the insulated connection 145. The distal side of the core tube 141 extends into the cryoprobe outer tube 144, and the outer wall of the core tube 141 and the inner wall of the cryoprobe outer tube 144 define a second backflow passage in fluid communication with the inlet flow passage.

The distal side of the cryoprobe outer tube 144 is plugged by a plug 146. Thus, fluid in the core tube 141 may flow out on the distal side of the core tube 141, and due to the blocking of the blocking piece 146, the fluid is turned back at the blocking piece 146 and enters the second return passage, which is also in fluid communication with the first return passage, and thus the fluid may be returned into the transmission member 300 along the second return passage and the first return passage.

As shown in fig. 4, the cryoprobe outer tube 144 is a site capable of performing cryoablation, and may be bent into a shape conforming to the distal end side shape of the first jaw assembly 110 together with the core tube 141 to facilitate clamping.

When the transmission member 300 transmits the cold working fluid, the cold working fluid enters the interior of the core tube 141 from the proximal end side of the core tube 141 and flows toward the distal end side of the core tube 141 along the inflow path, and the fluid flows between the distal end side of the core tube 141 and the cryoprobe outer tube 144, i.e., returns along the second return path, so that heat exchange with myocardial tissue can be performed at the cryoprobe outer tube 144 to perform ablation treatment. The heat-exchanged fluid enters the first return path along the second return path and flows into the return structure of the transfer member 300 to be recovered. Since the first return passage is defined by the inner wall of the heat insulating inner pipe 142 and the outer wall of the core pipe 141, and a vacuum layer is formed outside the heat insulating inner pipe 142 by providing the heat insulating outer pipe 143, it is known that the portion where the first return passage is located is a heat insulating portion, so that the portion does not exchange heat with the environment to secure the safety of the operation.

Further, it is contemplated that a thermal insulating material may be provided between the outer and inner insulating tubes 143, 142 to provide thermal insulation therebetween.

With continued reference to fig. 2 and 6a, the first jaw assembly 110 includes a first jaw 101 and a first electrode holder 102 connected to the first jaw 101, and the second jaw assembly 120 includes a second jaw 107 and a second electrode holder 108 connected to the second jaw 107, wherein the first jaw 101 and the second jaw 107 are disposed opposite to each other to clamp a corresponding tissue. The electrode 130 includes a first electrode 131 located in the first electrode holder 102 and a second electrode 132 located in the second electrode holder 108.

Referring to fig. 4 and 6a, the first electrode 131 is located in the first electrode holder 102, and a receiving groove 133 is disposed between the first electrode 131 and the first electrode holder 102, and the cryoprobe outer tube 144 is located in the receiving groove 133. As shown in fig. 6a, a part of the groove body may be formed on the first electrode holder 102, and another part of the groove body may be formed on the first electrode 131, so that after the first electrode 131 and the first electrode holder 102 are fastened to each other, the groove bodies on the two may form the accommodating groove 133 for fixing the outer tube 144 of the cryoprobe.

Alternatively, it will be appreciated that if the second jaw assembly 120 is configured with a chilled fluid inlet and return assembly 140, a receiving groove 133 can be configured between the second electrode 132 and the second electrode mount 108 in the manner described above, with the chilled probe outer tube 144 positioned in the receiving groove 133 between the second electrode 132 and the second electrode mount 108.

Further, the creepage distance between the first jaw 101 and the first electrode 131 is greater than the electrical gap therebetween, and/or the creepage distance between the second jaw 107 and the second electrode 132 is greater than the electrical gap therebetween.

In an alternative embodiment, as shown in fig. 10a, the first electrode holder 102 is entirely located in the first jaw 101. In such an embodiment, in order to increase the creepage distance between the first jaw 101 and the first electrode 131, an insulation groove 1021 may be provided on an end surface of the first electrode holder 102 opposite to the second electrode holder 108, the insulation groove 1021 extending from an end of the first electrode holder 102 in a direction toward the first jaw 101.

Since the first electrode holder 102 is made of an insulating material, both the first jaw 101 and the first electrode 131 are made of a conductive material. As shown in fig. 10a, in the radial cross section of the first jaw assembly 110, the outer end point of the first jaw 101 is a, the inner end point of the first jaw 101 contacting the first electrode holder 102 is B, the inner end point of the first electrode holder 102 is C due to the insulation groove 1021, the inner end point of the insulation groove 1021 is D, and the bottom wall of the insulation groove 1021 is flush with the end surface of the first electrode 131, so that the end point of the first electrode 131 is E. The creepage gap between the first jaw 101 and the first electrode 131 is ab+bc+cd+de, and the electric gap between the first jaw 101 and the first electrode 131 is ab+bc+ce, so that the creepage gap between the first jaw 101 and the first electrode 131 is larger than the electric gap between the first jaw and the first electrode 131, thereby meeting the requirement of electric insulation.

As shown in fig. 10a, the second electrode holder 108 may be provided with reference to the structure of the first electrode holder 102. For example, an insulating groove 1021 may be provided on an end surface of the second electrode holder 108 opposite to the first electrode holder 102, and the insulating groove 1021 may extend from an end of the second electrode holder 108 in a direction toward the second jaw 107, so that a creepage gap between the second jaw 107 and the second electrode 132 may be made larger than an electric gap therebetween.

Furthermore, since the requirement of electrical insulation can be met between the first jaw 101 and the first electrode 131, the end face of the second electrode holder 108 may not be provided with an insulation groove 1021, but may be provided in such a way that the second electrode 132 is embedded in the second electrode holder 108 and is flush with the end face of the second electrode holder 108, as shown in fig. 6 a.

Fig. 10a shows a case where one insulating groove 1021 is provided on the first electrode holder 102, it will be appreciated that a plurality of insulating grooves 1021 may be provided on the first electrode holder 102.

In an alternative embodiment, as shown in fig. 10b, a portion of the first electrode mount 102 is located in the first jaw 101. As shown in fig. 10b, a part of the first electrode holder 102 extends into the first jaw 101, and another part of the first electrode holder 102 is located outside the first jaw 101 and is flush with the outer surface of the first jaw 101. In such an embodiment, in order to increase the creepage distance between the first jaw 101 and the first electrode 131, an insulating groove 1021 may be provided on the end surface of the first electrode holder 102 opposite to the second electrode holder 108 as well, the insulating groove 1021 extending from the end of the first electrode holder 102 in a direction toward the first jaw 101.

As shown in fig. 10b, a plurality of insulation grooves 1021 are provided on the end surface of the first electrode holder 102, respectively located on both sides of the first electrode 131.

Since the first electrode holder 102 is made of an insulating material, both the first jaw 101 and the first electrode 131 are made of a conductive material. As shown in fig. 10b, in the radial cross section of the first jaw assembly 110, the end points of the outer side of the first jaw 101 and the first electrode holder 102, which are in contact with each other, are F, the outer end point of the first electrode holder 102 is G, the inner end points of the insulation groove 1021 are I and J, respectively, the outer and inner end points of the insulation groove 1021 are H and K, respectively, and the end of the first electrode holder 102 is flush with the end surface of the first electrode 131, so that the end point of the first electrode holder 102 and the first electrode 131, which are in contact with each other, is L. The creepage gap between the first jaw 101 and the first electrode 131 is fg+gh+hi+ij+jk+kl, and the electric gap between the two is fg+gl, so that the creepage gap between the first jaw 101 and the first electrode 131 is larger than the electric gap between the two, thereby meeting the requirement of electric insulation.

As shown in fig. 10b, the second electrode holder 108 may be provided with reference to the structure of the first electrode holder 102. For example, a portion of the second electrode mount 108 is located in the second jaw 107. As shown in fig. 10b, since the electrical insulation requirement can be satisfied between the first jaw 101 and the first electrode 131, the end face of the second electrode holder 108 may not be provided with the insulation groove 1021, but may be provided in such a manner that the second electrode 132 is embedded in the second electrode holder 108 and is flush with the end face of the second electrode holder 108.

Alternatively, it is conceivable that a plurality of insulation grooves 1021 may be provided on an end surface of the second electrode holder 108 opposite to the first electrode holder 102, and the plurality of insulation grooves 1021 may extend from an end portion of the second electrode holder 108 in a direction toward the second jaw 107, respectively, so that a creepage gap between the second jaw 107 and the second electrode 132 may be made larger than an electrical gap therebetween.

In an alternative embodiment, as shown in fig. 10c, a portion of the first jaw 101 is located in the first electrode holder 102. In this embodiment, since the first electrode holder 102 covers the first jaw 101 and isolates the first jaw 101 from the first electrode 131, a creepage gap between the first jaw 101 and the first electrode 131 is larger than an electrical gap therebetween, so that a requirement of electrical insulation can be satisfied.

Likewise, the second electrode holder 108 may be provided with reference to the structure of the first electrode holder 102. For example, a portion of second jaw 107 is located in second electrode mount 108. Or the second electrode holder 108 is provided in the form of a structure as shown in fig. 6a, 10a or 10 b.

In the manner shown in fig. 9a, 9b and 9c, the first electrode 131 is configured to have a rectangular radial cross section with grooves provided thereon to facilitate the mating of the cryoprobe outer tube 144. It is understood that the first electrode 131 may be configured in a structural form having other cross-sections.

As shown in fig. 6b, the first electrode 131 is constructed to have a circular cross section, which may replace the cryoprobe outer tube 144 in fig. 6, i.e., the core tube 141 is extended into the first electrode 131, and the inner wall of the core tube 141 forms the second reflux passage described above with the outer wall of the first electrode 131. A portion of the first electrode 131 is embedded in the first electrode holder 102 so that a portion of the core tube 141 can be exposed to the outside of the first electrode holder 102 to facilitate heat exchange of the first electrode 131 with tissue.

Alternatively, it is contemplated that a recess may be provided in the first electrode holder 102 and that the first electrode 131 is fully embedded in the first electrode holder 102, and that tissue may be clamped into the recess for ablation while clamping the tissue.

With continued reference to fig. 6b, the second electrode 132 may likewise be configured with a circular cross-section, which may likewise be partially or completely embedded in the second electrode holder 108.

One or more of the first electrode holder 102, the second electrode holder 108, the first electrode 131 and the second electrode 132 is provided with a pressure sensor and/or a liquid injection hole.

In some embodiments, as shown in fig. 9a, the second electrode 132 is provided with a plurality of pressure sensors 104, and the pressure sensors 104 may be respectively disposed on an upper side (i.e., a side close to the first electrode 131) of the second electrode 132. After the first jaw assembly 110 and the second jaw assembly 120 clamp the corresponding tissue, the pressure sensor 104 can monitor the clamping force applied to the tissue, so as to avoid the problem that the normal tissue is affected due to excessive clamping force or insufficient ablation is caused due to insufficient clamping force.

In some embodiments, as shown in fig. 9b, the plurality of pressure sensors 104 are respectively disposed on the lower side (i.e. the side far from the first electrode 131) of the second electrode 132, and since the second electrode 132 is embedded in the second electrode holder 108, the plurality of pressure sensors 104 are disposed between the second electrode 132 and the second electrode holder 108, so that monitoring of the clamping force can be achieved.

In some embodiments, as shown in fig. 9c, a plurality of pressure sensors 104 are respectively disposed at the bottom of the second electrode holder 108, and monitoring of the clamping force can be achieved.

It will be appreciated that the first electrode 131 and/or the first electrode holder 102 may also be provided with a pressure sensor 104, which may be arranged in the manner shown in fig. 9a, 9b and 9 c.

In some embodiments, as shown in fig. 11, the first electrode 131 is provided with a plurality of liquid injection holes 109, and liquid can be sprayed onto the clamped tissue through the liquid injection holes 109, so that the ablation effect on the tissue is better when the radio frequency ablation or the pulse ablation is performed, in addition, the sprayed liquid can also play a role in cooling, and the carbonization of the tissue on the electrode during the radio frequency ablation can also be prevented, so that the ablation effect is prevented from being influenced.

In some embodiments, as shown in fig. 12, a plurality of injection holes 109 are provided on the first electrode holder 102, so that the effect of spraying liquid can be achieved.

It will be appreciated that a plurality of injection holes 109 may also be provided in the second electrode 132 and/or the second electrode holder 108, and may be provided in the manner shown in fig. 11 and 12.

As described above, the first jaw assembly 110 has the chilled fluid inlet and return assembly 140 configured therein, and therefore, the second jaw assembly 120 is movable relative to the first jaw assembly 110 to adjust the closed gap between the distal sides thereof.

In particular, with continued reference to fig. 2,3 and 4, the first jaw assembly 110 further includes an outer tube 103 fixedly connected to the first jaw 101 and the gripping member 200, respectively, and an insulating sleeve 105 extending through the outer tube 103, the insulating outer tube 143 being disposed within the insulating sleeve 105.

With continued reference to fig. 2, the first jaw 101 includes a first receiving section 1012 and a first connecting section 1011, the first receiving section 1012 and the first connecting section 1011 forming an L-shaped structure. The first electrode mount 102 may be connected to the first receiving section 1012 in various manners as shown in fig. 10a, 10b and 10c, and the first connecting section 1011 is inserted into and connected to the distal side of the outer tube 103.

The second jaw assembly 120 further includes an inner tube 106 disposed within the outer tube 103, and an insulating sleeve 105 is disposed within the inner tube 106 and extends from a proximal side of the inner tube 106. The distal side of the inner tube 106 is connected to a second jaw 107. As shown in fig. 2, second jaw 107 includes a second receiving section 1072 and a second connecting section 1071, second receiving section 1072 and second connecting section 1071 forming an L-shaped structure. The second electrode holder 108 may be connected to the second receiving section 1072 in various manners as shown in fig. 10a, 10b and 10c, and the second connecting section 1071 is inserted into and connected to the distal end side of the inner tube 106.

In addition, a moving groove 1013 is further provided in the first connection section 1011, the moving groove 1013 extends in the extending direction of the first connection section 1011, and the second connection section 1071 may be provided in the moving groove 1013, and the inner tube 106 extends into the outer tube 103 and penetrates the outer tube 103, so that the first jaw assembly 110 and the second jaw assembly 120 may be combined into two parts that are relatively movable.

The proximal end side of the inner tube 106 protrudes into the grip member 200, and the inner tube 106 is capable of performing an operation of moving along its axis with respect to the outer tube 103.

Since the distal end side of the inner tube 106 is connected to the second jaw 107, when the inner tube 106 moves relative to the outer tube 103, the second jaw 107, the second electrode mount 108, and the second electrode 132 therein are integrally moved relative to the first jaw assembly 110 by the inner tube 106.

Movement of the inner tube 106 may be accomplished by a movement drive assembly 400 in the gripping member 200. It will be appreciated that the movement drive assembly 400 can also drive the second jaw assembly 120 to perform a moving operation. The movement drive assembly 400 may move the inner tube 106 by pulling a trigger, for example, or may move the inner tube 106 by pushing a push rod.

The composite ablation forceps of the invention also include a distance detection device 500 for detecting the size of the closure gap, the distance detection device 500 can be configured in a variety of ways to indicate the closure gap between the first jaw assembly 110 and the second jaw assembly 120.

In an alternative embodiment, distance detecting device 500 can be located on one of first jaw assembly 110 and second jaw assembly 120 that is not movable relative to each other. As shown in fig. 2 and 8a, the distance detecting device 500 is configured as a scale layer 510 provided on an outer wall of the first jaw 101 of the first jaw assembly 110. More specifically, the graduation layer 510 is positioned on the outer wall of the first connecting section 1011 of the first jaw 101, and the first receiving section 1012 is aligned with the zero graduation line on the graduation layer 510, so that the size of the closed gap between the first and second jaws 101 and 107 can be conveniently and rapidly read out when the second jaw 107, the second electrode mount 108, and the second electrode 132 are moved in the moving slot 1013 on the first connecting section 1011.

In an alternative embodiment, as shown in fig. 8b, the distance detecting device 500 may be a distance sensor 520 located inside the gripping member 200 at a position corresponding to the proximal side of one of the first jaw assembly 110 and the second jaw assembly 120. The distance sensor 520 may be, for example, a laser distance measuring sensor, which may be connected to a host computer (not shown) of the ablation system, so that the distance moved by the proximal side of the inner tube 106 is fed back to the host computer by a signal to show the size of the closed gap between the first jaw 101 and the second jaw 107, and the host computer automatically provides the above-mentioned various intensities of ablation energy, for example, applies different electric field intensities, according to the feedback signal, so that the ablation operation is more accurate and reliable.

In an alternative embodiment, as shown in fig. 8d, the distance detecting device 500 may be a slide rheostat 530 located inside the gripping member 200 and connected to the proximal side of the movable one of the first jaw assembly 110 and the second jaw assembly 120. More specifically, the inside of the grip member 200 is provided with a resistor, which constitutes a slide rheostat 530 with the proximal end side of the inner tube 106, and when the proximal end side of the inner tube 106 is moved, the resistance change causes a current signal to change so that the size of the closed gap between the first jaw 101 and the second jaw 107 can be calculated. The sliding rheostat 530 may be coupled to a host (not shown) of the ablation system so that the host may automatically provide the various ablation energy intensities described above based on the current signal, e.g., applying different electric field intensities, so that the ablation operation is more accurate and reliable.

As shown in fig. 3, the transmission member 300 includes a transmission line 301, a joint 302 at an end of the transmission line 301, an electric wire 303 in the transmission line 301, and a plug 304 at an end of the electric wire 303.

A support seat 213 is provided in the right housing 210 or the left housing 220, and the proximal end of the insulating sleeve 105 passes through the support seat 213 to be connected to the delivery pipe 301.

When the joint 302 is connected to an energy source (such as a cold tank), the cold working medium can be transmitted to the outer tube 144 of the cryoprobe along the conveying pipeline 301, and the first jaw 101 is made of a conductive material (such as metal), so that the first electrode 131 is immediately cooled, thereby performing heat exchange with tissues at the jaw to realize cryoablation.

When the plug 304 is connected to an energy source (e.g., a power source), the wire 303 may be electrically connected to the first electrode 131 and the second electrode 132, thereby releasing radio frequency energy or pulsed energy.

Example 1

In embodiment 1, as shown in fig. 7a, 7b, 8c, 8d and 8e, the movement driving unit 400 may move the inner tube 106 by pulling a trigger, for example. Specifically, the movement driving assembly 400 includes a pushing part 410 and a locking part 420. The pushing portion 410 is connected to the proximal side of the first jaw assembly 110 or the proximal side of the second jaw assembly 120, and at least two clamping slots 411 are provided on the pushing portion 410. The locking portion 420 is connected to the grip member 200, and an engaging protrusion 421 engaged with the engaging groove 411 is provided on the locking portion 420.

The pushing part 410 is rotatably connected with the holding member 200, when the pushing part 410 rotates relative to the holding member 200, the first jaw assembly 110 or the second jaw assembly 120 is moved to change the closing gap of the distal end sides of the two, and the locking part 420 performs an operation of being engaged with the corresponding catch 411 on the pushing part 410. The locking part 420 is rotatably connected to the holding member 200, and when the locking part 420 rotates relative to the holding member 200, an operation of engaging with the corresponding locking slot 411 of the pushing part 410 or an operation of disengaging from the corresponding locking slot 411 of the pushing part 410 is performed.

Specifically, as shown in fig. 7a and 7b, and in conjunction with fig. 1, the grip member 200 is configured in a generally pistol-like configuration that includes a right housing 210 and a left housing 220 that are snap-fit to each other. And distal and proximal sides thereof are provided with holes, respectively, from which the first and second jaw assemblies 110 and 120 can be extended, and from which the transmission member 300 can be extended, so as to be connected with the first and second jaw assemblies 110 and 120 inside the grip member 200.

As shown in fig. 7a and 7b, the pushing part 410 includes a link 412, a trigger 415 rotatably coupled to the link 412, a slider 413 rotatably coupled to the link 412, a boss 417 provided on an upper side of the trigger 415, and at least two catching slots 411 provided on the boss 417.

The outer tube 103 extends into the distal end sides of the right and left cases 210 and 220 and is fixedly connected to the right and left cases 210 and 220. The inner tube 106 extends through the outer tube 103 and in the right and left housings 210 and 220, and a slider 413 is fitted over the inner tube 106 and fixedly connected to the proximal end side of the inner tube 106. When the slider 413 is pushed, the inner tube 106 can be driven to move along the axis of the inner tube 106 relative to the outer tube 103, the right shell 210 and the left shell 220, and after the pushing force on the slider 413 is removed, the inner tube 106 can return relative to the outer tube 103, the right shell 210 and the left shell 220 in the opposite direction.

As shown in fig. 7b, a second pin 414 is disposed on the trigger 415 near the boss 417, the trigger 415 is rotatably connected to one end of the link 412 through the second pin 414, and the other end of the link 412 is rotatably connected to the slider 413 through a sixth pin 416. Trigger 415 is rotatably coupled to right housing 210 and left housing 220 by a third pin 418.

It can be seen that the rotation of the trigger 415 is converted into the linear motion of the slider 413 and the inner tube 106 by the rotation of the trigger 415 by the rotational connection of the trigger 415 and the link 412, the link 412 and the slider 413, and the trigger 415 and the right and left cases 210 and 220 via the pin shafts.

As shown in fig. 7a, the side of the trigger 415 near the inner tube 106 has an opening into which the hand of the operator can be inserted, so that when the hand of the operator is inserted into the opening and the trigger 415 is pressed, the trigger 415 is rotated in the counterclockwise direction as compared with the case of the right and left cases 210 and 220, and when the trigger 415 is rotated, the link 412 and the slider 413 are pushed, and since the slider 413 is connected to the proximal end side of the inner tube 106, the inner tube 106 can be pushed to move forward along the axis thereof, and the closing gap between the first jaw 101 and the second jaw 107 can be reduced.

The pusher 410 is also coupled to a pusher return element 440. As shown in fig. 7a, the pushing part restoring element 440 includes a first tension spring 441 and a first coupling post 442, one end of the first tension spring 441 is rotatably coupled with the fourth pin 419 on the trigger 415, the other end of the first tension spring 441 is coupled with the first coupling post 442, and the first coupling post 442 may be fixed to the right housing 210.

Accordingly, it can be seen that when a force is applied to the trigger 415 to rotate it counterclockwise, the first tension spring 441 is elongated to accumulate elastic energy, and at this time, the trigger 415 can drive the inner tube 106 to move toward the distal end side through the link 412 and the slider 413, so that the closing gap between the first jaw 101 and the second jaw 107 is reduced. Conversely, when the force applied to the trigger 415 is removed, the first tension spring 441 releases the elastic energy, thereby rotating the trigger 415 clockwise, and at this time, the trigger 415 can drive the inner tube 106 to move away from the distal end side through the link 412 and the slider 413, so that the closing gap between the first jaw 101 and the second jaw 107 increases.

Further, in order to allow the inner tube 106 to move in the opposite direction as soon as possible when the force on the trigger 415 is removed, a jaw return element 430 may be provided on the inner tube 106. As shown in fig. 7a, jaw return element 430 is a compression spring, one end of which is connected to the proximal side of outer tube 103 and the other end of which is connected to slider 413. Therefore, when the connecting rod 412 drives the sliding block 413 to drive the inner tube 106 to move, the jaw resetting element 430 is compressed to store elastic energy, and when the acting force on the sliding block 413 is removed, the jaw resetting element 430 releases the elastic energy, so that the sliding block 413 is pushed to drive the inner tube 106 to move in the opposite direction.

It is therefore conceivable that corresponding sliding grooves can be provided on the right housing 210 and the left housing 220 in order to constrain the movement path of the slider 413, which can limit and guide the slider 413, ensuring that the slider 413 moves in accordance with a predetermined movement path.

As described above, a distance sensor 520 may be provided at the proximal position of the slider 413, as shown in fig. 8b, which may detect the distance of movement of the slider 413 and the inner tube 106, thereby indicating a closed gap between the first jaw 101 and the second jaw 107.

Alternatively, a resistor may be provided on the right housing 210, as shown in fig. 8d, which may form a sliding rheostat 530 with the slider 413, which may convert the movement distance of the slider 413 and the inner tube 106 into an electrical signal for output to indicate a closed gap between the first jaw 101 and the second jaw 107.

When the inner tube 106 is moved to the corresponding position, it needs to be fixed at that position so that the first jaw 101 and the second jaw 107 maintain the current closed gap for the ablation operation. The above-described operation can be achieved by the locking portion 420.

As shown in fig. 7a and 7b, the locking part 420 includes a locking button 423 and a locking lever 422 connected to the locking button 423, and an engagement protrusion 421 engaged with the engagement groove 411 is provided at a proximal end side of the locking lever 422, and the engagement protrusion 421 may be configured in a hook form. The lock button 423 is located on the side of the trigger 415 near the slider 413.

As shown in fig. 7b, the locking lever 422 is rotatably coupled to the right and left cases 210 and 220 through the fifth pin 425, so that the locking lever 422 is rotated, the engaging protrusions 421 thereon may be lifted from the corresponding locking slots 411, thereby unlocking the locking portion 420 from the pushing portion 410, or the engaging protrusions 421 thereon may be inserted into the corresponding locking slots 411, thereby locking the locking portion 420 and the pushing portion 410 to each other.

In addition, the locking lever 422 is further connected to a locking portion resetting element 426, as shown in fig. 7b, a first pin shaft 424 is disposed on the locking lever 422, the locking portion resetting element 426 includes a second tension spring 4261 and a second connecting post 4262, two ends of the second tension spring 4261 are respectively connected to the first pin shaft 424 and the second connecting post 4262, and the second connecting post 4262 is fixed on the right housing 210.

In the initial state, the second tension spring 4261 may exert a tensile force on the locking lever 422, thereby causing the engagement protrusion 421 at the end of the locking lever 422 to abut against the boss 417. When the trigger 415 is rotated, the engaging protrusion 421 is abutted against the boss 417 without being separated due to the pulling force of the second tension spring 4261, so that the engaging protrusion 421 moves on the boss 417 and the lock lever 422 rotates accordingly. When the engaging protrusion 421 moves to the locking groove 411 on the boss 421, the second tension spring 4261 releases the elastic energy, so that the locking bar 422 rotates in the opposite direction, and the engaging protrusion 421 approaches the locking groove 411 and is engaged in the corresponding locking groove 411, thereby locking the locking part 420 and the pushing part 410 to each other.

Specifically, as shown in fig. 7a and 7b, when the trigger 415 is in the initial state, the engaging protrusion 421 of the locking lever 422 abuts against the side surface of the boss 417 closest to the distal end side of the slot 411 (i.e., the first slot) due to the elastic force of the locking portion return member 426.

In performing an ablation operation, if it is desired to change (reduce) the closure gap between first jaw 101 and second jaw 107, trigger 415 is grasped and trigger 415 is rotated by an angle such that the closure gap between first jaw 101 and second jaw 107 is reduced. In the rotation process of the trigger 415, the boss 417 on the upper side of the trigger 415 pushes up the engaging protrusion 421 at the end of the locking rod 422 to rotate the locking rod 422, meanwhile, the locking rod 422 is acted by the second tension spring 4261, and the engaging protrusion 421 does not separate from the side surface of the boss 417 but moves on the side surface of the boss 417 until the engaging protrusion 421 moves to the boss 417 to be close to the corresponding slot 411, and when the engaging protrusion 421 is moved to the boss 417, the engaging protrusion 421 is pulled into the slot 411 by the locking portion resetting element 426, as shown in fig. 8d and 8e, and at this time, the trigger 415 is released, the engaging protrusion 421 and the slot 411 are engaged with each other, so that the locking portion 420 and the pushing portion 410 are locked with each other.

If the closing gap between the first jaw 101 and the second jaw 107 needs to be reduced, the trigger 415 is directly and again gripped, and as described below, since the side wall of the locking groove 411 is an inclined side wall and the corresponding one end surface of the locking protrusion 421 is an inclined surface, when the trigger 415 is continuously gripped, the locking protrusion 421 can slide out of the corresponding locking groove 411, and the trigger 415 is continuously gripped to rotate further until the locking protrusion 421 is locked into the next groove 411, as shown in fig. 8b and 8c, and the trigger 415 is released again, so that the locking portion 420 and the pushing portion 410 are locked with each other again.

When the ablation operation is completed, the locking portion 420 and the pushing portion 410 are reset, respectively. At this time, the locking button 423 is pressed, so that the locking lever 422 rotates, the engaging protrusion 421 at the end portion of the locking lever leaves the corresponding engaging slot 411, the locking portion 420 and the pushing portion 410 are mutually unlocked, at this time, the locking button 423 is released, the locking lever 422 is restored to the initial state under the pulling force of the locking portion reset element 426, and the trigger 415 is restored to the initial state under the pulling force of the pushing portion reset element 440.

In addition, as shown in fig. 7a, the inner wall of the right housing 210 is further provided with a first limit rib 211 and a second limit rib 212, a second pin 414 and a third pin 418 on the trigger 415 are located between the first limit rib 211 and the second limit rib 212, and the corresponding positions on the inner wall of the left housing 220 are also provided with the same limit rib, so when the left housing 220 and the right housing 210 are buckled with each other, the first limit rib 211 on the inner wall of the right housing 210 is abutted with the corresponding limit rib on the inner wall of the left housing 220, the second limit rib 212 on the inner wall of the right housing 210 is abutted with the corresponding limit rib on the inner wall of the left housing 220, thereby clamping the trigger 415 between the left housing 220 and the right housing 210, preventing the trigger 415 from swinging towards the left housing 220 or the right housing 210, and thus the movement of the structures such as the trigger 415, the locking part 420, the pushing part 410 and the like can be more stable.

As shown in fig. 7a and 7b, the engaging protrusion 421 and the catch 411 are not engaged with each other, and the engaging protrusion 421 is located on the side of the catch 411 closest to the distal end side (i.e., the first catch). The trigger 415 is now in the initial state.

When the trigger 415 is rotated counterclockwise to the state of the trigger 415 as shown in fig. 8d and 8c, the engaging protrusion 421 is aligned with the catch 411 closest to the distal end side, and at this time, the engaging protrusion 421 can be caught in the catch 411 closest to the distal end side, thereby locking the locking part 420 and the pushing part 410 to each other. Thereby locking the closing gap between the first jaw 101 and the second jaw 107 in the current position. It will be appreciated that this position corresponds to a maximum closed gap between the first jaw 101 and the second jaw 107.

On the basis of fig. 8d and 8e, if it is desired to reduce the closing gap between the first jaw 101 and the second jaw 107, the trigger 415 can be rotated counterclockwise, the locking portion 420 and the pushing portion 410 can be unlocked, and the trigger 415 can be rotated counterclockwise to the maximum position as shown in fig. 8b and 8c, at which time the engaging protrusion 421 can be engaged into the engaging groove 411 (i.e., the last engaging groove) furthest from the distal end side, thereby locking the locking portion 420 and the pushing portion 410 to each other. Thereby locking the closing gap between the first jaw 101 and the second jaw 107 in the current position. It will be appreciated that this position corresponds to a minimum closed gap between the first jaw 101 and the second jaw 107.

The number of the clamping slots 411 can be correspondingly set according to the closing gap which needs to be adjusted, and the greater the number of the clamping slots 411 is, the higher the accuracy of the closing gap which can be adjusted is.

Further, as shown in fig. 7b and 8c, the sidewall of the locking slot 411 may be configured as an inclined sidewall, and a corresponding one end surface of the locking protrusion 421 may be configured as an inclined surface, so that the end of the locking protrusion 421 forms a wedge structure, so that the locking protrusion 421 can be smoothly locked into the corresponding locking slot 411.

Specifically, as shown in fig. 7c, referring to fig. 7b, an acute angle α1 is formed between two side walls of the locking slot 411 and the moving direction of the first jaw 101 (or the second jaw 107) (i.e. the axial direction of the inner tube 106), an acute angle α2 is formed between the locking protrusion 421 and the moving direction of the first jaw 101 (or the second jaw 107) (i.e. the axial direction of the inner tube 106), and α2 is smaller than α1, so that when the trigger 415 rotates counterclockwise, the locking protrusion 421 can slide out of the locking slot 411 and into the corresponding next locking slot 411, and conversely, when the trigger 415 rotates clockwise, the locking protrusion 421 cannot slide out of the locking slot 411, but can only be unlocked by pressing the locking button 423.

Since the restoring force required for the lock lever 422 is small, the second tension spring 4261 may be provided shorter than the first tension spring 441.

Example 2

In embodiment 2, as shown in fig. 13, 14, 15 and 16, the movement driving unit 400 may move the inner tube 106 by moving a push rod, for example.

Specifically, the movement driving assembly 400 includes a pushing part 410 and a locking part 420. The pushing portion 410 is connected to the proximal side of the first jaw assembly 110 or the proximal side of the second jaw assembly 120, and at least two clamping slots 411 are disposed on the pushing portion 410 (refer to fig. 14). The locking portion 420 is connected to the grip member 200, and an engaging protrusion 421 engaged with the engaging groove 411 is provided on the locking portion 420.

As shown in fig. 13, in the present embodiment 2, the holding member 200 is generally in the form of a syringe, which may also include a right housing 210 and a left housing 220, which may be snap-fitted together.

The pushing part 410 is movably connected with the holding member 200, when the pushing part 410 moves relative to the holding member 200, the first jaw assembly 110 or the second jaw assembly 120 is moved to change the closing gap of the distal end sides of the two, and the locking part 420 performs an operation of being engaged with the corresponding catch 411 on the pushing part 410.

The locking part 420 is movably connected to the holding member 200, and when the locking part 420 moves relative to the holding member 200, an operation of engaging with the corresponding locking slot 411 on the pushing part 410 or an operation of disengaging from the corresponding locking slot 411 on the pushing part 410 is performed.

As shown in fig. 14, the pushing portion 410 is configured in a structure of a push rod 4101, one end of the push rod 4101 is connected to the jaw resetting element 430, and the other end of the push rod 4101 is provided with a push button 4104 for pushing the push rod 4101. The jaw resetting element 430 is connected to the proximal end side of the inner tube 106, and a push button is provided at the other end of the push rod 4101. By pressing the push button, the push rod 4101 is pushed to compress the jaw resetting element 430, the jaw resetting element 430 accumulates elastic energy and pushes the inner tube 106 to move along the axis thereof, and when the force on the push button is released, the jaw resetting element 430 releases the elastic energy to move the push rod 4101 and the inner tube 106 in the opposite direction.

Further, as shown in fig. 14, a connecting groove 4102 penetrating the push rod 4101 in the thickness direction thereof is provided on the push rod 4101, and the lock portion 420 includes a lock button 423 and a lock lever 422 connected to the lock button 423, the lock lever 422 being provided in the connecting groove 4102. One side of the connection groove 4102 is provided with a saw tooth structure 4103, and a clamping groove 411 is formed between two adjacent saw tooth structures 4103. As shown in fig. 14 and 15, the engaging protrusion 421 is configured as wedge-shaped bosses 4221 at both sides of the locking lever 422. When the wedge boss 4221 is engaged with one of the teeth of the saw tooth structure 4103, the lock bar 422 is interlocked with the push rod 4101.

Furthermore, a locking portion return element 426, which may be a compression spring, is provided on the locking lever 422. When it is desired to adjust the closing gap between the first jaw 101 and the second jaw 107, the push rod 4101 may be pushed, the teeth in the saw tooth structure 4103 may exert a force on the wedge-shaped boss 4221, thereby making the locking lever 422 go deeper into the connecting groove 4102, the wedge-shaped boss 4221 is separated from the corresponding teeth, at this time the locking lever 422 and the push rod 4101 are unlocked from each other, and when the locking lever 422 goes deeper into the connecting groove 4102, the locking portion resetting element 426 is compressed to store elastic energy.

When the push rod 4101 is moved to the proper position, the latch return element 426 releases the elastic energy, causing the latch rod 422 to be slightly ejected out of the connecting slot 4102 until the wedge-shaped boss 4221 on the latch rod 422 engages with the corresponding tooth on the saw-tooth structure 4103, thereby locking the latch rod 422 and the push rod 4101 to each other.

Since the saw tooth structure 4103 can include a plurality of teeth, different teeth of the wedge shaped boss 4221 can correspond to different closing gaps between the first jaw 101 and the second jaw 107 when engaged, thereby being adaptable to ablation operations of tissue of different thicknesses.

According to a second aspect of the invention, the present invention also provides an ablation system comprising the composite ablation forceps described above, and further comprising an energy source coupled to the delivery member 300. The energy source may be, for example, a cold source, in which a cold medium is carried, which is connected to the supply line 301 via a connection 302. The energy source may also be a power source, which is connected to the electric wire 303 by a plug 304.

By the way, reference herein to "distal side" refers to a side close to the first jaw 101 and the second jaw 107, and "proximal side" refers to a side distant from the first jaw 101 and the second jaw 107 (as shown in fig. 1 and 13).

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A composite ablation forceps characterized by comprising a clamping component (100), a holding component (200) and a transmission component (300);

the clamping member (100) comprises a first jaw assembly (110) and a second jaw assembly (120), one of the first jaw assembly (110) and the second jaw assembly (120) being capable of performing an operation of moving relative to the other to vary a closing gap between a distal side of the first jaw assembly (110) and a distal side of the second jaw assembly (120);

A proximal side of the first jaw assembly (110) and a proximal side of the second jaw assembly (120) extend into the gripping member (200), one or both of the first jaw assembly (110) and the second jaw assembly (120) being provided with an electrode (130) and/or a chilled fluid return assembly (140), the electrode (130) being in electrically conductive connection with the transmission member (300), the chilled fluid return assembly (140) being in fluid communication with the transmission member (300);

The delivery member (300) is configured to provide energy to the electrode (130) and/or the cryogenic fluid inlet/return assembly (140) such that a distal side of the first jaw assembly (110) and/or a distal side of the second jaw assembly (120) is configured to perform a respective ablation operation.

2. The composite ablation forceps of claim 1, wherein the first jaw assembly (110) comprises a first jaw (101) and a first electrode mount (102) connected to the first jaw (101), the second jaw assembly (120) comprises a second jaw (107) and a second electrode mount (108) connected to the second jaw (107), the electrode (130) comprises a first electrode (131) located in the first electrode mount (102) and a second electrode (132) located in the second electrode mount (108);

the creepage distance between the first jaw (101) and the first electrode (131) is larger than the electrical clearance between the two, and/or

The creepage distance between the second jaw (107) and the second electrode (132) is greater than the electrical clearance between the two.

3. The composite ablation forceps of claim 2, wherein the first jaw (101) is connected to the first electrode mount (102) by one or more of:

The first electrode holder (102) is integrally positioned in the first jaw (101);

one part of the first electrode holder (102) is positioned in the first jaw (101);

-a part of the first jaw (101) is located in the first electrode holder (102);

When the whole or a part of the first electrode holder (102) is positioned in the first jaw (101), one or more insulation grooves (1021) are formed in the first electrode holder (102), and each insulation groove (1021) extends from the end part of the first electrode holder (102) in the direction towards the first jaw (101).

4. The composite ablation forceps of claim 2, wherein the first jaw assembly (110) or the second jaw assembly (120) includes a chilled fluid inlet and return assembly (140), the chilled fluid inlet and return assembly (140) comprising:

a core tube (141), the core tube (141) defining an inflow passage in fluid communication with the transmission member (300) to perform an operation of delivering an inflow fluid;

-an insulated inner tube (142) located outside the core tube (141), the inner wall of the insulated inner tube (142) and the outer wall of the core tube (141) defining a first return passage in fluid communication with the transfer member (300) to perform an operation of conveying a return fluid;

an insulating outer tube (143) located outside the insulating inner tube (142), and

A cryoprobe outer tube (144) connected to distal sides of the insulated inner tube (142) and the insulated outer tube (143), a distal side of the core tube (141) extending into the cryoprobe outer tube (144), an outer wall of the core tube (141) and an inner wall of the cryoprobe outer tube (144) defining a second backflow passage in fluid communication with the inflow passage.

5. The composite ablation forceps of claim 4, wherein the first jaw assembly (110) further comprises an outer tube (103) fixedly connected to the first jaw (101) and the gripping member (200), respectively, and an insulating sleeve (105) extending through the outer tube (103), the insulating outer tube (143) being disposed in the insulating sleeve (105);

The second jaw assembly (120) further comprises an inner tube (106) arranged in the outer tube (103), the insulation sleeve (105) penetrates through the inner tube (106), wherein the distal side of the inner tube (106) is connected with the second jaw (107), the proximal side of the inner tube (106) extends into the holding part (200), and the inner tube (106) can perform an operation of moving along the axis of the inner tube relative to the outer tube (103).

6. The composite ablation forceps of claim 4, characterized in that a receiving groove (133) is provided between the first electrode (131) and the first electrode holder (102) and/or between the second electrode (132) and the second electrode holder (108), the cryoprobe outer tube (144) being located in the receiving groove (133).

7. The composite ablation forceps of claim 1 or 2, further comprising a distance detection device (500) for detecting a size of the closed gap, the distance detection device (500) comprising:

a scale layer (510) located on a sidewall of one of the first jaw assembly (110) and the second jaw assembly (120);

a distance sensor (520) located inside the grip member (200) at a position corresponding to a proximal end side of one of the first jaw assembly (110) and the second jaw assembly (120), or

A slide rheostat (530) located inside the gripping member (200) and connected to a proximal side of the movable one of the first jaw assembly (110) and the second jaw assembly (120).

8. The composite ablation forceps of claim 2, wherein one or more of the first electrode holder (102), the second electrode holder (108), the first electrode (131) and the second electrode (132) are provided with a pressure sensor and/or a fluid injection hole.

9. The composite ablation forceps of claim 1 or 2, wherein a movement drive assembly (400) is provided in the gripping member (200), the movement drive assembly (400) being configured to drive the first jaw assembly (110) or the second jaw assembly (120) to perform a moving operation;

the movement drive assembly (400) comprises:

A pushing part (410) connected with the proximal end side of the first jaw assembly (110) or the proximal end side of the second jaw assembly (120), wherein at least two clamping grooves (411) are arranged on the pushing part (410), and

And a locking part (420) connected to the holding member (200), wherein an engagement protrusion (421) engaged with the engagement groove (411) is provided on the locking part (420).

10. The composite ablation forceps of claim 9, wherein the pushing portion (410) is rotatably or movably connected to the gripping member (200), the pushing portion (410) moving the first jaw assembly (110) or the second jaw assembly (120) to change a closing gap on a distal side of both when rotated or moved relative to the gripping member (200).

11. The composite ablation forceps of claim 9, wherein the locking portion (420) is rotatably or movably connected to the grip member (200), and wherein the locking portion (420) performs an operation of engaging with a corresponding slot (411) on the pushing portion (410) or an operation of disengaging from a corresponding slot (411) on the pushing portion (410) when rotated or moved relative to the grip member (200).

12. An ablation system comprising the composite ablation forceps of any of claims 1-11, further comprising an energy source, the energy source being coupled to the delivery member (300);

the transmission component (300) is capable of performing one or more of the following operations:

delivering refrigeration energy to the chilled fluid intake return assembly (140);

Delivering radio frequency energy to the electrode (130), and

Delivering pulsed electric field energy to the electrode (130);

Such that the distal side of the first jaw assembly (110) and/or the distal side of the second jaw assembly (120) is capable of performing one or more of cryoablation, radiofrequency ablation, and pulsed electric field ablation sequentially or simultaneously.