Compound ablation forceps and ablation system

Abstract

The present invention relates to a composite ablation forceps and an ablation system, and relates to the field of ablation technology. The composite ablation forceps of the present invention includes a clamping component, a holding component, and a transmission component. Since the transmission component can deliver energy to the cryogenic fluid inlet and return assembly and / or the electrode, the distal side of the first jaw assembly and / or the distal side of the second jaw assembly can perform corresponding ablation operations. Therefore, different ablation strategies can be determined according to the lesion, so as to avoid accidentally injuring normal tissues and ensure more thorough ablation treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of ablation, and in particular to a composite ablation forceps and an ablation system. Background Art

[0002] Atrial fibrillation is the most common persistent cardiac arrhythmia. During atrial fibrillation, the atrial excitation frequency reaches 300 to 600 beats per minute. The heart rate is often fast and irregular, sometimes reaching 100 to 160 beats per minute. It is not only much faster than the normal heartbeat, but also absolutely irregular, and the atria lose their effective contraction function.

[0003] At present, the treatment of atrial fibrillation generally uses the jaws of ablation forceps to clamp abnormal myocardial tissue and release cryoenergy, radiofrequency energy or pulsed electric field energy to the myocardial tissue, thereby destroying abnormal myocardial tissue cells at the jaws, or causing irreversible electroporation on the cell membrane and eventually leading to cell apoptosis. However, due to structural limitations, existing ablation forceps can generally only release a single energy, that is, they can only perform cryoablation, radiofrequency ablation or pulsed electric field ablation separately. For lesions with large areas and sensitive areas, there may be problems with incomplete ablation. Summary of the invention

[0004] The present invention provides a composite ablation forceps and an ablation system, which are used to solve at least one of the above-mentioned technical problems.

[0005] The present invention provides a composite ablation forceps, comprising a clamping component, a holding component and a transmission component;

[0006] 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 of moving relative to the other to change a closed gap between a distal end side of the first jaw assembly and a distal end side of the second jaw assembly;

[0007] The proximal side of the first jaw assembly and the proximal side of the second jaw assembly extend into the holding component, and one or both of the first jaw assembly and the second jaw assembly are provided with an electrode and / or a cryogenic fluid inlet and return assembly, the electrode is conductively connected to the transmission component, and the cryogenic fluid inlet and return assembly is in fluid communication with the transmission component;

[0008] The transmission component can perform one or more of the following operations:

[0009] delivering refrigeration energy to the refrigeration fluid inlet and reflux assembly;

[0010] delivering thermal energy to the electrode;

[0011] delivering pulsed electric field energy to the electrodes;

[0012] The distal side of the first jaw assembly and / or the distal side of the second jaw assembly can sequentially perform one of cryoablation, radiofrequency ablation and pulsed electric field ablation, or simultaneously perform multiple operations of cryoablation, radiofrequency ablation and pulsed electric field ablation.

[0013] In one embodiment, the first jaw assembly includes a first jaw and a first electrode seat connected to the first jaw, the second jaw assembly includes a second jaw and a second electrode seat connected to the second jaw, and the electrode includes a first electrode located in the first electrode seat and a second electrode located in the second electrode seat;

[0014] The creepage distance between the first jaw and the first electrode is greater than the electrical clearance therebetween; and / or

[0015] A creepage distance between the second jaw and the second electrode is greater than an electrical gap therebetween.

[0016] In one embodiment, the first jaw is connected to the first electrode holder in one or more of the following ways:

[0017] The first electrode holder is entirely located in the first jaw;

[0018] A portion of the first electrode holder is located in the first jaw;

[0019] A portion of the first jaw is located in the first electrode seat;

[0020] When the first electrode seat as a whole or a part thereof is located in the first jaw, one or more insulating grooves are provided on the first electrode seat, and each of the insulating grooves extends from an end of the first electrode seat in a direction toward the first jaw.

[0021] In one embodiment, the first jaw assembly or the second jaw assembly comprises a cryogenic fluid inlet and return assembly, wherein the cryogenic fluid inlet and return assembly comprises:

[0022] a core tube defining an inlet flow passage, the inlet flow passage being in fluid communication with the transmission component to perform an operation of delivering an inlet fluid;

[0023] an insulating inner tube, which is located outside the core tube, wherein the inner wall of the insulating inner tube and the outer wall of the core tube define a first reflux passage, and the first reflux passage is in fluid communication with the transmission component to perform an operation of transmitting reflux fluid;

[0024] an insulating outer pipe located outside the insulating inner pipe; and

[0025] A cryoprobe outer tube is connected to the insulated inner tube and the distal side of the insulated outer tube, the distal side of the core tube extends into the cryoprobe outer tube, the outer wall of the core tube and the inner wall of the cryoprobe outer tube define a second reflux passage, and the second reflux passage is fluidically connected to the inlet passage.

[0026] 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 penetrating the outer tube, wherein the heat-insulating outer tube is disposed in the insulating sleeve;

[0027] The second jaw assembly also includes an inner tube arranged in the outer tube, and the insulating sleeve passes through the inner tube; wherein the distal side of the inner tube is connected to the second jaw, and the proximal side of the inner tube extends into the holding part, and the inner tube can perform an operation of moving along its axis relative to the outer tube.

[0028] In one embodiment, a receiving groove is provided between the first electrode and the first electrode seat and / or between the second electrode and the second electrode seat, and the outer tube of the cryoprobe is located in the receiving groove.

[0029] In one embodiment, a distance detection device for detecting the size of the closed gap is further included, and the distance detection device includes:

[0030] a scale layer located on a side wall of one of the first jaw assembly and the second jaw assembly;

[0031] a distance sensor located inside the gripping member and at a position corresponding to the proximal side of one of the first jaw assembly and the second jaw assembly; or

[0032] A sliding resistor is located inside the gripping member and connected to the proximal end side of the movable one of the first jaw assembly and the second jaw assembly.

[0033] 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.

[0034] In one embodiment, the gripping component is provided with a moving driving assembly, and the moving driving assembly is used to drive the first jaw assembly or the second jaw assembly to perform a moving operation;

[0035] The mobile driving component comprises:

[0036] a pushing portion connected to the proximal side of the first jaw assembly or the proximal side of the second jaw assembly, the pushing portion being provided with at least two slots; and

[0037] A locking portion is connected to the holding component, and the locking portion is provided with a locking protrusion that is engaged with the locking groove.

[0038] In one embodiment, the pushing portion is rotationally or movably connected to the holding member, and when the pushing portion rotates or moves relative to the holding member, the first jaw assembly or the second jaw assembly moves to change the closed gap on the distal sides of the two.

[0039] In one embodiment, the locking portion is rotatably or movably connected to the holding component, and when the locking portion rotates or moves relative to the holding component, it performs an operation of engaging with or separating from the corresponding slot on the pushing portion.

[0040] According to a second aspect of the present invention, the present invention provides an ablation system, comprising the above-mentioned composite ablation forceps, and also comprising an energy source, wherein the energy source is connected to the transmission component.

[0041] Compared with the prior art, the advantage of the present invention is that, since the transmission component can transmit energy to the cryofluid inlet and reflux assembly and / or the electrode, the distal side of the first jaw assembly and / or the distal side of the second jaw assembly can perform corresponding ablation operations. Therefore, different ablation strategies can be determined according to the lesion, thereby avoiding accidental injury to normal tissue and ensuring more thorough ablation treatment.

[0042] Adding scales, position sensors and pressure sensors allows the operator to more intuitively observe the clamping condition of the ablated tissue, reduces the doctor's subjective experience judgment, and improves the operator's surgical experience and surgical accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0044] Figure 1 is a schematic diagram of the three-dimensional structure of the composite ablation forceps in Example 1 of the present invention;

[0045] Figure 2 is an exploded view of the first jaw assembly and the second jaw assembly in Embodiment 1 of the present invention;

[0046] Figure 3 is a cross-sectional view of the composite ablation forceps in Example 1 of the present invention;

[0047] Figure 4 is a schematic diagram of the three-dimensional structure of the first electrode in Example 1 of the present invention;

[0048] Figure 5 yes Figure 4 Sectional view at AA;

[0049] Figure 6a yes Figure 1 A cross-sectional view of the first jaw assembly and the second jaw assembly shown;

[0050] Figure 6b is a cross-sectional view of a first jaw assembly and a second jaw assembly in another embodiment of the present invention;

[0051] Figure 7a yes Figure 3 Only a schematic diagram of the gripping part is shown, wherein the locking part is in an unlocked state;

[0052] Figure 7b yes Figure 7a Enlarged view at B;

[0053] Figure 7c is a schematic structural diagram of a locking protrusion and a boss in an embodiment of the present invention;

[0054] Figure 8a is a schematic structural diagram of a first jaw having a scale layer in Embodiment 1 of the present invention;

[0055] Figure 8b is a schematic diagram of the structure in which a distance sensor is provided in the gripping component in Embodiment 1 of the present invention, wherein the locking portion is in a locked state;

[0056] Figure 8c yes Figure 8b Enlarged view at C;

[0057] Figure 8d is a schematic diagram of the structure in which a sliding rheostat is provided in the gripping component in Embodiment 1 of the present invention, wherein the locking portion is in an unlocked state;

[0058] Figure 8e yes Figure 8d Enlarged view at D;

[0059] Figure 9a is a structural schematic diagram of a pressure sensor disposed on the top of the second electrode in Example 1 of the present invention;

[0060] Figure 9b is a structural schematic diagram of a pressure sensor disposed at the bottom of the second electrode in Example 1 of the present invention;

[0061] Fig.9c is a structural schematic diagram of a pressure sensor disposed at the bottom of the second electrode holder in Example 1 of the present invention;

[0062] Fig.10a , Fig.10b and Fig.10cSchematic diagram of the connection between the first jaw and the first electrode base in Embodiment 1 of the present invention;

[0063] Fig.11 Schematic diagram of the first electrode with a liquid injection hole provided therein in Embodiment 1 of the present invention;

[0064] Fig.12 Schematic diagram of the first electrode base with a liquid injection hole provided therein in Embodiment 1 of the present invention;

[0065] Fig.13 Schematic diagram of the three - dimensional structure of the composite ablation forceps in Embodiment 2 of the present invention;

[0066] Fig.14 Schematic diagram of the cooperation between the pushing part and the locking part in Embodiment 2 of the present invention;

[0067] Fig.15 Schematic diagram of the locking part in Embodiment 2 of the present invention;

[0068] Fig.16 Schematic diagram of the unlocking button in Embodiment 2 of the present invention.

[0069] Reference numerals:

[0070] 100, clamping component; 200, holding component; 300, transmission component; 400, moving drive assembly; 500, distance detection device;

[0071] 110, first jaw assembly; 120, second jaw assembly; 130, electrode; 140, cryogenic fluid inlet - return assembly;

[0072] 101, first jaw; 102, first electrode base; 103, outer tube; 104, pressure sensor; 105, insulating sleeve; 106, inner tube; 107, second jaw; 108, second electrode base; 109, liquid injection hole;

[0073] 1011, first connection segment; 1012, first receiving segment; 1013, moving groove;

[0074] 1071, second connection segment; 1072, second receiving segment;

[0075] 1021, insulating groove;

[0076] 131, electrode; 131, first electrode; 132, second electrode; 133, receiving groove;

[0077] 141, core tube; 142, adiabatic inner tube; 143, adiabatic outer tube; 144, cryoprobe outer tube; 145, adiabatic connector; 146, plugging member;

[0078] 210, right housing; 220, left housing;

[0079] 211, first limiting rib; 212, second limiting rib; 213, supporting seat;

[0080] 301, delivery pipeline; 302, joint; 303, wire; 304, plug;

[0081] 410, pushing part; 411, slot; 412, connecting rod; 413, slider; 414, second pin; 415, trigger; 416, sixth pin; 417, boss; 418, third pin; 419, fourth pin;

[0082] 420, locking portion; 421, engaging protrusion; 422, locking rod; 423, locking button; 424, first pin shaft; 425, fifth pin shaft; 426, locking portion resetting element;

[0083] 4221, wedge-shaped boss;

[0084] 4261, second tension spring; 4262, second connecting column;

[0085] 430, jaw resetting element;

[0086] 440, a pusher reset element; 441, a first tension spring; 442, a first connecting column;

[0087] 4101, push rod; 4102, connecting groove; 4103, sawtooth structure; 4104, push button;

[0088] 510, scale layer; 520, distance sensor; 530, sliding rheostat. DETAILED DESCRIPTION

[0089] The present invention will be further described below in conjunction with the accompanying drawings.

[0090] According to a first aspect of the present invention, Figure 1 As shown, the present invention provides a composite ablation forceps, comprising a clamping component 100 , a holding component 200 and a transmission component 300 .

[0091] The distal end of the clamping component 100 can clamp the diseased tissue or area, and perform corresponding ablation operations as needed. Specifically, the clamping component 100 includes a first jaw assembly 110 and a second jaw assembly 120, and one of the first jaw assembly 110 and the second jaw assembly 120 can perform an operation of moving relative to the other to change the closed gap between the distal end of the first jaw assembly 110 and the distal end of the second jaw assembly 120. Different closed gaps between the distal end of the first jaw assembly 110 and the distal end of the second jaw assembly 120 can be used for different ablation sites. In particular, the clamping component 100 is suitable for ablation operations on myocardial tissue. Since the thickness of myocardial tissue of different patients is different (for example, the thickness of myocardial tissue of people of different age groups is significantly different), by changing the closed gap, myocardial tissues of different thicknesses can be clamped with uniform force to avoid the situation where the closed gap is too small to clamp the tissue and the gap is too large to cause insufficient ablation.

[0092] like Figure 1 and Figure 3 As shown, the proximal side of the clamping component 100 extends into the holding component 200 from one side of the holding component 200, and the transmission component 300 extends into the holding component 200 from the other side of the holding component 200, so that the proximal side of the clamping component 100 can be connected to the transmission component 300. The transmission component 300 can transmit various ablation energies, such as freezing energy, thermal energy, and pulsed electric field energy, to the clamping component 100, so that the distal side of the clamping component 100 can perform corresponding ablation operations on the diseased tissue or area as needed.

[0093] Specifically, Figure 2 and Figure 3 As shown, the proximal side of the first jaw assembly 110 and the proximal side of the second jaw assembly 120 extend into the holding part 200, and one or both of the first jaw assembly 110 and the second jaw assembly 120 are provided with an electrode 130 and / or a freezing fluid inlet and return assembly 140, the electrode 130 is conductively connected to the transmission part 300, and the freezing fluid inlet and return assembly 140 is fluidically connected to the transmission part 300.

[0094] Optionally, the transmission component 300 can deliver cryoenergy to the cryofluid inlet and outlet assembly 140 and / or the transmission component 300 can deliver one or both of thermal energy and pulsed electric field energy to the electrode 130, so that the distal end side of the first jaw assembly 110 and / or the distal end side of the second jaw assembly 120 can sequentially perform one of cryoablation, radiofrequency ablation, and pulsed electric field ablation. For example, the distal end side of the first jaw assembly 110 and / or the distal end side of the second jaw assembly 120 can sequentially perform cryoablation, radiofrequency ablation, and pulsed electric field ablation.

[0095] Optionally, the transmission component 300 can deliver cryoenergy to the cryofluid inlet and outlet assembly 140 and / or the transmission component 300 can deliver one or both of thermal energy and pulsed electric field energy to the electrode 130, so 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 operations of 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 simultaneously perform cryoablation and pulsed electric field ablation operations, or the distal side of the first jaw assembly 110 and / or the distal side of the second jaw assembly 120 can simultaneously perform radiofrequency ablation and pulsed electric field ablation operations.

[0096] When the transmission component 300 inputs a cold medium (such as liquid nitrogen or cooling water, liquid metal, etc.) into the freezing fluid inlet and reflux component 140 in the first jaw assembly 110 or the second jaw assembly 120, the cold medium can flow to the distal side of the first jaw assembly 110 or the distal side of the second jaw assembly 120, thereby performing a cryoablation operation on the diseased tissue or area; when the transmission component 300 inputs radio frequency energy into the electrodes 130 in the first jaw assembly 110 and the second jaw assembly 120, one of the distal sides of the first jaw assembly 110 and the second jaw assembly 120 serves as the positive electrode, and the other serves as the negative electrode to form a discharge circuit, thereby releasing radio frequency energy; when the transmission component 300 inputs pulse energy into the electrodes 130 in the first jaw assembly 110 and the second jaw assembly 120, the distal sides of the first jaw assembly 110 and the second jaw assembly 120 respectively form electrode pairs for pulse discharge, thereby releasing pulse energy.

[0097] It can be understood that the transmission component 300 can transmit one type of energy, or two or more types of energies, so 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 a plurality of combinations of energies. For example, when performing radiofrequency ablation, cooling water can be simultaneously input into the cryofluid inlet and outlet assembly 140 to avoid overheating of the surrounding tissue of the lesion area and to cool the clamping component 100.

[0098] like Figure 2 As shown, a refrigerant fluid inlet and return assembly 140 is constructed in the first jaw assembly 110 or the second jaw assembly 120. More specifically, the refrigerant fluid inlet and return assembly 140 is constructed on the relatively fixed one of the first jaw assembly 110 and the second jaw assembly 120 to avoid compression or stretching of the refrigerant fluid inlet and return assembly 140 when the corresponding jaw assembly is moved, thereby causing leakage of the refrigerant.

[0099] For example, the second jaw assembly 120 can be moved relative to the first jaw assembly 110 along its axial direction, so that the cryogenic fluid inlet and outlet assembly 140 can be constructed in the first jaw assembly 110. Figure 2 , Figure 4 and Figure 5 As shown, the cryogenic fluid inlet and reflux assembly 140 includes a core tube 141 , an insulating inner tube 142 , an insulating outer tube 143 and a cryogenic probe outer tube 144 .

[0100] like Figure 4 and Figure 5 As shown, the core tube 141 defines an inlet flow passage, which is in fluid communication with the transmission component 300 to perform the operation of conveying the inlet fluid. The insulated inner tube 142 is located outside the core tube 141, and the inner wall of the insulated inner tube 142 and the outer wall of the core tube 141 define a first return flow passage, which is in fluid communication with the transmission component 300 to perform the operation of conveying the return fluid. The insulated outer tube 143 is located outside the insulated inner tube 142. Therefore, it can be understood that the refrigerant fluid inlet and return assembly 140 is sequentially arranged from the inside to the outside, including the core tube 141, the insulated inner tube 142 and the insulated outer tube 143.

[0101] like Figure 4 As shown, a heat-insulating connector 145 is fixed to one end of the heat-insulating outer tube 143 and the heat-insulating inner tube 142, and a vacuum process is performed between the heat-insulating outer tube 143 and the heat-insulating inner tube 142. After the vacuum process is completed, the ends of the heat-insulating outer tube 143 and the heat-insulating inner tube 142 away from the heat-insulating connector 145 are sealed with glass solder during the vacuum process. Therefore, it can be seen that a vacuum insulation layer is formed between the heat-insulating outer tube 143 and the heat-insulating inner tube 142.

[0102] The cryoprobe outer tube 144 is connected to the distal ends of the insulated inner tube 142 and the insulated outer tube 143 through the insulated connector 145, and is in fluid communication with the insulated inner tube 142 through the insulated connector 145. The distal end 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 reflux passage, which is in fluid communication with the inlet passage.

[0103] The distal end of the cryoprobe outer tube 144 is blocked by the blocking member 146. Therefore, the fluid in the core tube 141 can flow out at the distal end of the core tube 141. Due to the blocking of the blocking member 146, the fluid is turned back at the blocking member 146 and enters the second reflux passage. The second reflux passage is also fluidically connected to the first reflux passage, so the fluid can return to the transmission component 300 along the second reflux passage and the first reflux passage.

[0104] like Figure 4As shown, the outer tube 144 of the cryoprobe is the part where cryoablation can be performed, and it can be bent together with the core tube 141 into a shape consistent with the distal side shape of the first jaw assembly 110 to facilitate clamping.

[0105] When the transmission component 300 transmits the cold working medium, the cold working medium enters the interior of the core tube 141 from the proximal side of the core tube 141, and flows along the inlet passage to the distal side of the core tube 141. The fluid flows into the space between the core tube 141 and the outer tube 144 of the cryoprobe at the distal side of the core tube 141, that is, returns along the second reflux passage, so that heat exchange can be performed with the myocardial tissue at the outer tube 144 of the cryoprobe, thereby performing ablation treatment. The fluid after heat exchange enters the first reflux passage along the second reflux passage, and flows into the reflux structure of the transmission component 300 for recycling treatment. Since the first reflux passage is defined by the inner wall of the insulating inner tube 142 and the outer wall of the core tube 141, and a vacuum layer is formed by setting the insulating outer tube 143 outside the insulating inner tube 142, it can be known that the portion where the first reflux passage is located is an insulating portion, so that this portion will not perform heat exchange with the environment to ensure the safety of operation.

[0106] In addition, it is conceivable that an insulating material may be disposed between the insulating outer tube 143 and the insulating inner tube 142 to achieve thermal insulation therebetween.

[0107] Please continue to see Figure 2 and Figure 6a As shown, the first jaw assembly 110 includes a first jaw 101 and a first electrode seat 102 connected to the first jaw 101, and the second jaw assembly 120 includes a second jaw 107 and a second electrode seat 108 connected to the second jaw 107, wherein the first jaw 101 and the second jaw 107 are arranged opposite to each other to clamp corresponding tissues. The electrode 130 includes a first electrode 131 located in the first electrode seat 102 and a second electrode 132 located in the second electrode seat 108.

[0108] Please combine Figure 4 and Figure 6a The first electrode 131 is located in the first electrode holder 102, and a receiving groove 133 is provided between the first electrode 131 and the first electrode holder 102, and the cryoprobe outer tube 144 is located in the receiving groove 133. Figure 6a As shown, a portion of the groove body can be constructed on the first electrode seat 102, and another portion of the groove body can be constructed on the first electrode 131. After the first electrode 131 and the first electrode seat 102 are buckled together, the groove bodies on the two can form a receiving groove 133 for fixing the outer tube 144 of the cryoprobe.

[0109] Alternatively, it can be understood that if a freezing fluid inlet and reflux assembly 140 is constructed in the second jaw assembly 120, a receiving groove 133 can be constructed between the second electrode 132 and the second electrode seat 108 in the above manner, and the freezing probe outer tube 144 is located in the receiving groove 133 between the second electrode 132 and the second electrode seat 108.

[0110] 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.

[0111] In a selected embodiment, Fig.10a As shown, the first electrode holder 102 is entirely located in the first jaw 101. In this 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, and the insulating groove 1021 extends from the end of the first electrode holder 102 in a direction toward the first jaw 101.

[0112] Since the first electrode holder 102 is made of insulating material, the first jaw 101 and the first electrode 131 are both made of conductive material. Fig.10a As shown, in the radial section of the first jaw assembly 110, the outer end point of the first jaw 101 is A, and the inner end point that contacts the first electrode holder 102 is B. The inner side of the first electrode holder 102 has an inner end point C because of the insulating groove 1021, and the inner end point of the insulating groove 1021 is D. The bottom wall of the insulating groove 1021 is flush with the end face of the first electrode 131, so the end point of the first electrode 131 is E. The creepage clearance between the first jaw 101 and the first electrode 131 is AB+BC+CD+DE, and the electrical clearance between the two is AB+BC+CE. It can be seen that the creepage clearance between the first jaw 101 and the first electrode 131 is greater than the electrical clearance between the two, so that the electrical insulation requirements can be met.

[0113] like Fig.10a As shown, the second electrode holder 108 can be arranged with reference to the structure of the first electrode holder 102. For example, an insulating groove 1021 can also be arranged on the end surface of the second electrode holder 108 opposite to the first electrode holder 102, and the insulating groove 1021 extends from the end of the second electrode holder 108 in a direction toward the second jaw 107, so that the creepage clearance between the second jaw 107 and the second electrode 132 can be greater than the electrical clearance between the two.

[0114] In addition, since the first jaw 101 and the first electrode 131 can meet the requirements of electrical insulation, the end surface of the second electrode holder 108 may not be provided with an insulating groove 1021, but may be provided as follows: Figure 6a As shown, the second electrode 132 is embedded in the second electrode holder 108 and is arranged flush with the end surface of the second electrode holder 108 .

[0115] Fig.10a The figure shows a situation where one insulating groove 1021 is provided on the first electrode holder 102 . It is understandable that a plurality of insulating grooves 1021 may also be provided on the first electrode holder 102 .

[0116] In an optional embodiment, if Fig.10b As shown, a portion of the first electrode holder 102 is located in the first jaw 101. Fig.10b As shown, a portion of the first electrode holder 102 extends into the first jaw 101, and another portion 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 this embodiment, in order to increase the creepage distance between the first jaw 101 and the first electrode 131, an insulating groove 1021 can also be provided on the end surface of the first electrode holder 102 opposite to the second electrode holder 108, and the insulating groove 1021 extends from the end of the first electrode holder 102 in a direction toward the first jaw 101.

[0117] like Fig.10b As shown, a plurality of insulating grooves 1021 are provided on the end surface of the first electrode holder 102 , respectively located on both sides of the first electrode 131 .

[0118] Since the first electrode holder 102 is made of insulating material, the first jaw 101 and the first electrode 131 are both made of conductive material. Fig.10b As shown, in the radial section of the first jaw assembly 110, the endpoint where the outer side of the first jaw 101 contacts the first electrode holder 102 is F, the outer endpoint of the first electrode holder 102 is G, the inner endpoints of the insulating groove 1021 are I and J respectively, the outer and inner endpoints of the insulating 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 the endpoint where the first electrode holder 102 contacts the first electrode 131 is L. Then the creepage clearance between the first jaw 101 and the first electrode 131 is FG+GH+HI+IJ+JK+KL, and the electrical clearance between the two is FG+GL, so it can be known that the creepage clearance between the first jaw 101 and the first electrode 131 is greater than the electrical clearance between the two, thereby meeting the electrical insulation requirements.

[0119] like Fig.10bAs shown, the second electrode holder 108 can be arranged with reference to the structure of the first electrode holder 102. For example, a portion of the second electrode holder 108 is located in the second jaw 107. Fig.10b As shown, since the electrical insulation requirements 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 insulating groove 1021, but the second electrode 132 may be embedded in the second electrode holder 108 and be flush with the end face of the second electrode holder 108.

[0120] Alternatively, it can be imagined that a plurality of insulating grooves 1021 may be provided on the end face of the second electrode seat 108 opposite to the first electrode seat 102, and the plurality of insulating grooves 1021 extend respectively from the end of the second electrode seat 108 in a direction toward the second jaw 107, so that the creepage gap between the second jaw 107 and the second electrode 132 can be greater than the electrical gap between the two.

[0121] In an optional embodiment, if Fig.10c As shown, 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 it from the first electrode 131, the creepage clearance between the first jaw 101 and the first electrode 131 is greater than the electrical clearance between the two, thereby meeting the electrical insulation requirements.

[0122] Similarly, the second electrode holder 108 can be configured with reference to the structure of the first electrode holder 102. For example, a portion of the second jaw 107 is located in the second electrode holder 108. Figure 6a , Fig.10a Or it can be set up in the structural form shown in 10b.

[0123] exist Figure 9a , Figure 9b and Fig.9c In the illustrated embodiment, the first electrode 131 is configured to have a rectangular radial cross section, and a groove is provided thereon to facilitate the cooperation with the cryoprobe outer tube 144. It is understandable that the first electrode 131 may be configured to have a structural form with other cross sections.

[0124] like Figure 6bAs shown, the first electrode 131 is constructed to have a circular cross-section, which can replace the cryoprobe outer tube 144 in Figure 6, that is, the core tube 141 extends into the first electrode 131, and the inner wall of the core tube 141 and the outer wall of the first electrode 131 form the second recirculation path described above. 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 outside the first electrode holder 102, so as to facilitate heat exchange between the first electrode 131 and the tissue.

[0125] Or it can be imagined that a depression can be provided on the first electrode holder 102, and the first electrode 131 is completely embedded in the first electrode holder 102, and when clamping tissue, the tissue can be clamped into the depression for ablation.

[0126] Please continue to see Figure 6b The second electrode 132 may also be configured to have a circular cross-section and may also be partially or completely embedded in the second electrode holder 108 .

[0127] 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.

[0128] In some embodiments, Figure 9a As shown, a pressure sensor 104 is disposed on the second electrode 132. There may be multiple pressure sensors 104, which are respectively disposed on the upper side of the second electrode 132 (i.e., the side close to the first electrode 131). When the first jaw assembly 110 and the second jaw assembly 120 clamp the corresponding tissue, the clamping force on the tissue can be monitored by the pressure sensor 104, thereby avoiding the problem of excessive clamping force affecting normal tissue or insufficient clamping force causing insufficient ablation.

[0129] In some embodiments, Figure 9b As shown, multiple pressure sensors 104 are respectively arranged on the lower side of the second electrode 132 (i.e., the side away from the first electrode 131). Since the second electrode 132 is embedded in the second electrode seat 108, the multiple pressure sensors 104 are located between the second electrode 132 and the second electrode seat 108, which can also realize the monitoring of clamping force.

[0130] In some embodiments, Fig.9c As shown, a plurality of pressure sensors 104 are respectively arranged at the bottom of the second electrode holder 108, and the monitoring of the clamping force can also be realized.

[0131] It is understandable that the first electrode 131 and / or the first electrode holder 102 may also be provided with a pressure sensor 104, which may be configured as follows: Figure 9a , Figure 9b and Fig.9cSet it up as shown.

[0132] In some embodiments, Fig.11 As shown, a plurality of injection holes 109 are provided on the first electrode 131, and liquid can be sprayed onto the clamped tissue through the injection holes 109, so that the ablation effect on the tissue is better during radio frequency ablation or pulse ablation. In addition, the sprayed liquid can also play a cooling role, and can also prevent the tissue from carbonizing and sticking to the electrode during radio frequency ablation, thereby avoiding affecting the ablation effect.

[0133] In some embodiments, Fig.12 As shown, a plurality of liquid injection holes 109 are provided on the first electrode holder 102, which can also realize the function of liquid injection.

[0134] It is understandable that a plurality of injection holes 109 may also be provided on the second electrode 132 and / or the second electrode holder 108. Fig.11 and Fig.12 Set it up as shown.

[0135] As described above, the first jaw assembly 110 is configured with the cryogenic fluid inlet and outlet assembly 140 , and therefore, the second jaw assembly 120 can be moved relative to the first jaw assembly 110 , thereby adjusting the closed gap between the distal ends thereof.

[0136] For details, please refer to Figure 2 , Figure 3 and Figure 4 The first jaw assembly 110 also includes an outer tube 103 fixedly connected to the first jaw 101 and the holding component 200 respectively, and an insulating sleeve 105 passing through the outer tube 103 , and the insulating outer tube 143 is arranged in the insulating sleeve 105 .

[0137] Please continue to see Figure 2 The first jaw 101 includes a first accommodating section 1012 and a first connecting section 1011, and the first accommodating section 1012 and the first connecting section 1011 form an L-shaped structure. The first electrode holder 102 can be Fig.10a , Fig.10b and Fig.10c The various modes shown are connected to the first accommodating section 1012 , and the first connecting section 1011 is inserted into the distal end side of the outer tube 103 and connected to the distal end side of the outer tube 103 .

[0138] The second jaw assembly 120 further includes an inner tube 106 disposed in the outer tube 103, and the insulating sleeve 105 is disposed in the inner tube 106 and extends from the proximal side of the inner tube 106. The distal side of the inner tube 106 is connected to the second jaw 107. Figure 2As shown, the second jaw 107 includes a second accommodating section 1072 and a second connecting section 1071, and the second accommodating section 1072 and the second connecting section 1071 form an L-shaped structure. Fig.10a , Fig.10b and Fig.10c The various modes shown are connected to the second accommodating section 1072 , and the second connecting section 1071 is inserted into the distal end side of the inner tube 106 and connected to the distal end side of the inner tube 106 .

[0139] In addition, a movable groove 1013 is also provided in the first connecting segment 1011, and the movable groove 1013 extends along the extension direction of the first connecting segment 1011. The second connecting segment 1071 can be provided in the movable groove 1013, and the inner tube 106 extends into the outer tube 103 and passes through the outer tube 103, so that the first jaw assembly 110 and the second jaw assembly 120 can be combined into two components that can move relative to each other.

[0140] The proximal end side of the inner tube 106 extends into the gripping member 200 , and the inner tube 106 can move along its axis relative to the outer tube 103 .

[0141] Since the distal end 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 holder 108 and the second electrode 132 therein are driven as a whole by the inner tube 106 to move relative to the first jaw assembly 110 .

[0142] The movement of the inner tube 106 can be achieved by the mobile driving assembly 400 in the gripping member 200. It can be understood that the mobile driving assembly 400 can also drive the second jaw assembly 120 to perform a moving operation. The mobile driving assembly 400 can, for example, move the inner tube 106 by pulling a trigger, or can move the inner tube 106 by pushing a push rod.

[0143] The composite ablation forceps of the present invention further comprises a distance detection device 500 for detecting the size of a closed gap. The distance detection device 500 can be constructed in various forms to indicate the closed gap between the first jaw assembly 110 and the second jaw assembly 120 .

[0144] In an optional embodiment, the distance detection device 500 may be located on one of the first jaw assembly 110 and the second jaw assembly 120 that cannot move relative to each other. Figure 2 and Figure 8aAs shown, the distance detection device 500 is constructed as a scale layer 510 disposed on the outer wall of the first jaw 101 of the first jaw assembly 110. More specifically, the scale layer 510 is located on the outer wall of the first connecting section 1011 of the first jaw 101, and the first accommodating section 1012 is aligned with the zero scale line on the scale layer 510, so when the second jaw 107, the second electrode seat 108 and the second electrode 132 move in the moving groove 1013 on the first connecting section 1011, the size of the closed gap between the first jaw 101 and the second jaw 107 can be read quickly and conveniently.

[0145] In an optional embodiment, if Figure 8b As shown, the distance detection device 500 may be a distance sensor 520, which is located inside the gripping member 200 and 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 sensor, which may be connected to a host (not shown) of the ablation system, so as to feed back the distance moved by the proximal side of the inner tube 106 to the host through a signal to display the size of the closed gap between the first jaw 101 and the second jaw 107. The host automatically provides the above-mentioned various ablation energy intensities according to the feedback signal, such as applying different electric field intensities, so as to make the ablation operation more accurate and reliable.

[0146] In an optional embodiment, if Figure 8d As shown, the distance detection device 500 may be a sliding rheostat 530, which is located inside the gripping part 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, a resistor is provided inside the gripping part 200, which together with the proximal side of the inner tube 106 constitutes the sliding rheostat 530. When the proximal side of the inner tube 106 moves, the resistance change will cause the 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 can be connected to the host (not shown) of the ablation system, so that the host can automatically provide the above-mentioned various ablation energy intensities according to the current signal, such as applying different electric field intensities, so as to make the ablation operation more accurate and reliable.

[0147] like Figure 3 As shown, the transmission component 300 includes a delivery pipeline 301 , a joint 302 located at the end of the delivery pipeline 301 , an electric wire 303 located in the delivery pipeline 301 , and a plug 304 located at the end of the electric wire 303 .

[0148] A support seat 213 is provided in the right shell 210 or the left shell 220 , and the proximal end of the insulating sleeve 105 passes through the support seat 213 to be connected to the delivery pipeline 301 .

[0149] When the connector 302 is connected to an energy source (such as a cold tank), the cold medium can be transmitted along the delivery pipeline 301 to the outer tube 144 of the cryoprobe. Since the first jaw 101 is made of a conductive material (such as metal), the first electrode 131 will immediately cool down, thereby exchanging heat with the tissue at the jaw to achieve cryoablation.

[0150] When the plug 304 is connected to an energy source (such as a power source), the wire 303 can be connected to the first electrode 131 and the second electrode 132 to release radio frequency energy or pulse energy.

[0151] Example 1

[0152] In this embodiment 1, Figure 7a , Figure 7b , Figure 8b , Figure 8c , Figure 8d and Figure 8e As shown, the mobile driving assembly 400 can, for example, move the inner tube 106 by pulling a trigger. Specifically, the mobile driving assembly 400 includes a pushing portion 410 and a locking portion 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 slots 411 are provided on the pushing portion 410. The locking portion 420 is connected to the gripping component 200, and a locking protrusion 421 is provided on the locking portion 420 to be engaged with the slot 411.

[0153] The pushing portion 410 is rotatably connected to the gripping member 200. When the pushing portion 410 rotates relative to the gripping member 200, the first jaw assembly 110 or the second jaw assembly 120 moves to change the closed gap at the distal ends of the two jaws, and the locking portion 420 performs an operation of engaging with the corresponding slot 411 on the pushing portion 410. The locking portion 420 is rotatably connected to the gripping member 200. When the locking portion 420 rotates relative to the gripping member 200, the locking portion 420 performs an operation of engaging with the corresponding slot 411 on the pushing portion 410 or separating from the corresponding slot 411 on the pushing portion 410.

[0154] Specifically, if Figure 7a and Figure 7b Please combine Figure 1 The gripping member 200 is constructed in a substantially pistol-like structure, and includes a right housing 210 and a left housing 220, which are connected to each other in a buckled manner. The distal and proximal sides of the two housings are provided with holes, respectively, and the first jaw assembly 110 and the second jaw assembly 120 can be inserted from the distal side thereof, and the transmission member 300 can be inserted from the distal side thereof, so as to be connected to the first jaw assembly 110 and the second jaw assembly 120 inside the gripping member 200.

[0155] like Figure 7a and Figure 7b As shown, the pushing portion 410 includes a connecting rod 412, a trigger 415 rotatably connected to the connecting rod 412, a slider 413 rotatably connected to the connecting rod 412, a boss 417 disposed on the upper side of the trigger 415, and at least two slots 411 disposed on the boss 417.

[0156] The outer tube 103 extends into the distal end of the right shell 210 and the left shell 220, and is fixedly connected to the right shell 210 and the left shell 220. The inner tube 106 penetrates the outer tube 103 and extends in the right shell 210 and the left shell 220. The slider 413 is sleeved on the inner tube 106 and is fixedly connected to the proximal end of the inner tube 106. When the slider 413 is pushed, it can drive the inner tube 106 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; after the thrust on the slider 413 is removed, the inner tube 106 can return in the opposite direction relative to the outer tube 103, the right shell 210 and the left shell 220.

[0157] like Figure 7b As shown, a second pin 414 is provided on the trigger 415 near the boss 417. The trigger 415 is rotatably connected to one end of the connecting rod 412 through the second pin 414, and the other end of the connecting rod 412 is rotatably connected to the slider 413 through the sixth pin 416. The trigger 415 is rotatably connected to the right housing 210 and the left housing 220 through the third pin 418.

[0158] Therefore, it can be known that the trigger 415 and the connecting rod 412, the connecting rod 412 and the slider 413, and the trigger 415 and the right shell 210 and the left shell 220 are all rotatably connected via pins, so that by rotating the trigger 415, its rotational motion can be converted into linear motion of the slider 413 and the inner tube 106.

[0159] like Figure 7a As shown, the trigger 415 has an opening on one side close to the inner tube 106 for the operator's hand to be inserted into. Therefore, when the operator's hand is inserted into the opening and presses the trigger 415, the trigger 415 can be made to rotate counterclockwise, which is equivalent to the right shell 210 and the left shell 220. When the trigger 415 rotates, it can push the connecting rod 412 and the slider 413. Since the slider 413 is connected to the proximal side of the inner tube 106, it can push the inner tube 106 to move forward along its axis, thereby reducing the closed gap between the first jaw 101 and the second jaw 107.

[0160] The push portion 410 is also connected to the push portion reset element 440. Figure 7aAs shown, the pushing portion reset element 440 includes a first tension spring 441 and a first connecting column 442, one end of the first tension spring 441 is rotatably connected to the fourth pin 419 on the trigger 415, and the other end of the first tension spring 441 is connected to the first connecting column 442, and the first connecting column 442 can be fixed on the right shell 210.

[0161] Therefore, it can be known that when a force acts on the trigger 415 to rotate it counterclockwise, the first tension spring 441 is stretched to accumulate elastic energy, and the trigger 415 can drive the inner tube 106 to move toward the distal end through the connecting rod 412 and the slider 413, thereby reducing the closed gap between the first jaw 101 and the second jaw 107. Conversely, when the force acting on the trigger 415 is removed, the first tension spring 441 releases elastic energy, thereby causing the trigger 415 to rotate clockwise, and the trigger 415 can drive the inner tube 106 to move away from the distal end through the connecting rod 412 and the slider 413, thereby increasing the closed gap between the first jaw 101 and the second jaw 107.

[0162] Furthermore, in order to enable the inner tube 106 to move in the reverse direction as quickly as possible when the force on the trigger 415 is removed, a jaw resetting element 430 may be provided on the inner tube 106. Figure 7a As shown, the jaw reset element 430 is a compression spring, one end of which is connected to the proximal side of the outer tube 103, and the other end is connected to the slider 413. Therefore, when the connecting rod 412 drives the slider 413 to drive the inner tube 106 to move, the jaw reset element 430 is compressed and accumulates elastic energy; when the force on the slider 413 is cancelled, the jaw reset element 430 releases the elastic energy, thereby pushing the slider 413 to drive the inner tube 106 to move in the opposite direction.

[0163] Therefore, it can be imagined that in order to constrain the moving path of the slider 413, corresponding slide grooves can be set on the right shell 210 and the left shell 220, and the slide grooves can limit and guide the slider 413 to ensure that the slider 413 moves according to the predetermined movement path.

[0164] As described above, a distance sensor 520 may be provided at the proximal end of the slider 413. Figure 8b As shown, it can detect the moving distance of the slider 413 and the inner tube 106 , thereby indicating the closed gap between the first jaw 101 and the second jaw 107 .

[0165] Alternatively, a resistor may be provided on the right housing 210, such as Figure 8d As shown, it and the slider 413 can form a sliding resistor 530, which can convert the movement distance of the slider 413 and the inner tube 106 into an electrical signal for output to indicate the closed gap between the first jaw 101 and the second jaw 107.

[0166] When the inner tube 106 moves to a corresponding position, it needs to be fixed at the position so that the first jaw 101 and the second jaw 107 maintain the current closed gap to perform ablation operation. The above operation can be achieved through the locking portion 420.

[0167] like Figure 7a and Figure 7b As shown, the locking portion 420 includes a locking button 423 and a locking rod 422 connected to the locking button 423. The proximal side of the locking rod 422 is provided with a locking protrusion 421 that is engaged with the locking groove 411. The locking protrusion 421 can be configured in the form of a hook. The locking button 423 is located on a side of the trigger 415 close to the slider 413.

[0168] like Figure 7b As shown, the locking rod 422 is rotatably connected to the right shell 210 and the left shell 220 through the fifth pin 425. Therefore, when the locking rod 422 rotates, the engaging protrusion 421 thereon can be lifted from the corresponding engaging groove 411, thereby unlocking the locking portion 420 and the pushing portion 410, or the engaging protrusion 421 thereon can be inserted into the corresponding engaging groove 411, thereby locking the locking portion 420 and the pushing portion 410 with each other.

[0169] In addition, the locking rod 422 is also connected to the locking portion reset element 426. Figure 7b As shown, a first pin shaft 424 is provided on the locking rod 422, and the locking part reset element 426 includes a second tension spring 4261 and a second connecting column 4262, and the two ends of the second tension spring 4261 are respectively connected to the first pin shaft 424 and the second connecting column 4262, and the second connecting column 4262 is fixed on the right shell 210.

[0170] In the initial state, the second tension spring 4261 can exert a pulling force on the locking rod 422, so that the engaging protrusion 421 at the end of the locking rod 422 abuts against the boss 417. When the trigger 415 rotates, due to the pulling force of the second tension spring 4261, the engaging protrusion 421 abuts against the boss 417 and does not separate, so the engaging protrusion 421 moves on the boss 417, and the locking rod 422 rotates accordingly. As the locking rod 422 rotates, the second tension spring 4261 accumulates elastic energy; when the engaging protrusion 421 moves on the boss 421 to the slot 411 on the boss 421, the second tension spring 4261 releases elastic energy, so that the locking rod 422 rotates in the opposite direction, and the engaging protrusion 421 approaches the slot 411 and is inserted into the corresponding slot 411, so that the locking portion 420 and the pushing portion 410 are locked with each other.

[0171] Specifically, if Figure 7a and Figure 7bAs shown, when the trigger 415 is in the initial state, due to the elastic force of the locking portion reset element 426, the locking protrusion 421 of the locking rod 422 abuts against the side of the slot 411 (i.e., the first slot) on the boss 417 that is closest to the distal end.

[0172] During the ablation operation, if it is necessary to change (reduce) the closing gap between the first jaw 101 and the second jaw 107, the trigger 415 is held and rotated by a certain angle to reduce the closing gap between the first jaw 101 and the second jaw 107. During the rotation of the trigger 415, the boss 417 on the upper side of the trigger 415 will lift the engaging protrusion 421 at the end of the locking rod 422, so that the locking rod 422 rotates. At the same time, due to the pulling force of the second tension spring 4261, the engaging protrusion 421 of the locking rod 422 will not separate from the side of the boss 417 but will move on the side of the boss 417 until the engaging protrusion 421 moves to the boss 417 close to the corresponding engaging groove 411. Then, the engaging protrusion 421 will be pulled into the engaging groove 411 by the locking portion reset element 426, as shown in FIG. Figure 8d and Figure 8e At this time, the trigger 415 is released, and the engaging protrusion 421 and the engaging groove 411 engage with each other, so that the locking portion 420 and the pushing portion 410 are locked with each other.

[0173] If it is necessary to reduce the closing gap between the first jaw 101 and the second jaw 107, the trigger 415 is directly squeezed again. As described below, since the side wall of the slot 411 is an inclined side wall, one end surface of the engaging protrusion 421 is an inclined surface, so when the trigger 415 is continuously squeezed, the engaging protrusion 421 can slide out of the corresponding slot 411, and the trigger 415 is continuously squeezed to make it rotate further until the engaging protrusion 421 is engaged in the next groove 411, as shown in FIG. Figure 8b and Figure 8c As shown, releasing the trigger 415 again can cause the locking portion 420 and the pushing portion 410 to be locked with each other again.

[0174] When the ablation operation is completed, the locking part 420 and the pushing part 410 are reset respectively. At this time, the locking button 423 can be pressed to rotate the locking rod 422, and the engaging protrusion 421 at the end thereof leaves the corresponding locking groove 411, so that the locking part 420 and the pushing part 410 are unlocked from each other. At this time, the locking button 423 is released, and the locking rod 422 is restored to the initial state under the pulling force of the locking part reset element 426, and the trigger 415 is restored to the initial state under the action of the push part reset element 440.

[0175] In addition, if Figure 7aAs shown, a first limiting rib 211 and a second limiting rib 212 are further provided on the inner wall of the right shell 210, and the second pin 414 and the third pin 418 on the trigger 415 are located between the first limiting rib 211 and the second limiting rib 212; the same limiting ribs are also provided at corresponding positions on the inner wall of the left shell 220, so when the left shell 220 and the right shell 210 are buckled together, the first limiting rib 211 on the inner wall of the right shell 210 abuts against the corresponding limiting rib on the inner wall of the left shell 220, and the second limiting rib 212 on the inner wall of the right shell 210 abuts against the corresponding limiting rib on the inner wall of the left shell 220, thereby clamping the trigger 415 between the left shell 220 and the right shell 210 to prevent the trigger 415 from swinging toward the left shell 220 or the right shell 210, so that the movement of structures such as the trigger 415, the locking portion 420 and the pushing portion 410 can be made more stable.

[0176] like Figure 7a and Figure 7b As shown, the engaging protrusion 421 and the engaging slot 411 are not engaged with each other, and the engaging protrusion 421 is located on the side of the engaging slot 411 closest to the distal end (ie, the first engaging slot). At this time, the trigger 415 is in the initial state.

[0177] When the trigger 415 is rotated counterclockwise to Figure 8d and Figure 8c When the trigger 415 is in the state shown, the engaging protrusion 421 is aligned with the engaging groove 411 closest to the distal end, and the engaging protrusion 421 can be inserted into the engaging groove 411 closest to the distal end, thereby locking the locking portion 420 and the pushing portion 410 with each other. Thus, the closed gap between the first jaw 101 and the second jaw 107 is locked at the current position. It can be understood that this position corresponds to the maximum closed gap between the first jaw 101 and the second jaw 107.

[0178] exist Figure 8d and Figure 8e On the basis of the above, if it is necessary to reduce the closing gap between the first jaw 101 and the second jaw 107, the trigger 415 can be rotated counterclockwise to unlock the locking portion 420 and the pushing portion 410. Figure 8b and Figure 8c , the trigger 415 rotates counterclockwise to the maximum position, at which time the engaging protrusion 421 can be engaged with the engaging groove 411 (i.e., the last engaging groove) farthest from the distal end, thereby locking the locking portion 420 and the pushing portion 410 with each other. Thus, the closed gap between the first jaw 101 and the second jaw 107 is locked at the current position. It can be understood that this position corresponds to the minimum closed gap between the first jaw 101 and the second jaw 107.

[0179] The number of the card slots 411 can be set accordingly according to the closed gap that needs to be adjusted. The greater the number of the card slots 411, the higher the precision of the closed gap that can be adjusted.

[0180] Furthermore, if Figure 7b and Figure 8c As shown, the side wall of the slot 411 can be constructed as an inclined side wall, and a corresponding end face of the engaging protrusion 421 can be set as an inclined face, so that the end of the engaging protrusion 421 forms a wedge-shaped structure, so that the engaging protrusion 421 can be smoothly engaged in the corresponding slot 411.

[0181] Specifically, Figure 7c Please combine Figure 7b There is an acute angle between the two side walls of the 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). α 1. There is an acute angle between the engaging 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). α 2, and α 2 is less than α 1, so that when the trigger 415 rotates counterclockwise, the engaging protrusion 421 can slide out of the slot 411 and slide into the corresponding next slot 411; on the contrary, when the trigger 415 rotates clockwise, the engaging protrusion 421 cannot slide out of the slot 411, but can only be unlocked by pressing the locking button 423.

[0182] Since the restoring force required by the locking rod 422 is relatively small, the second tension spring 4261 can be shorter than the first tension spring 441 .

[0183] Example 2

[0184] In this embodiment 2, Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, the moving driving assembly 400 can, for example, move the inner tube 106 by moving a push rod.

[0185] Specifically, the mobile driving assembly 400 includes a pushing portion 410 and a locking portion 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 card slots 411 are provided on the pushing portion 410 (please refer to Fig.14 The locking portion 420 is connected to the holding component 200 , and a locking protrusion 421 is provided on the locking portion 420 to be engaged with the locking groove 411 .

[0186] like Fig.13As shown, in this embodiment 2, the holding component 200 is generally in the structural form of a syringe, which can also include a right shell 210 and a left shell 220, which can be snap-fitted and connected.

[0187] The pushing portion 410 is movably connected to the holding part 200. When the pushing portion 410 moves relative to the holding part 200, the first jaw assembly 110 or the second jaw assembly 120 moves to change the closing gap on the distal sides of the two, and the locking portion 420 performs an operation of engaging with the corresponding slot 411 on the pushing portion 410.

[0188] The locking portion 420 is movably connected to the holding component 200 . When the locking portion 420 moves relative to the holding component 200 , it engages with or separates from the corresponding slot 411 on the pushing portion 410 .

[0189] like Fig.14 As shown, the pushing portion 410 is constructed in the form of a push rod 4101, one end of which is connected to the jaw reset element 430, and the other end of the push rod 4101 is provided with a push button 4104 to push the push rod 4101. The jaw reset element 430 is connected to the proximal side of the inner tube 106; the other end of the push rod 4101 is provided with a push button. By pressing the push button, the push rod 4101 pushes the jaw reset element 430 to compress, the jaw reset element 430 accumulates elastic energy, and pushes the inner tube 106 to move along its axis; when the force on the push button is withdrawn, the jaw reset element 430 releases elastic energy, so that the push rod 4101 and the inner tube 106 move in the opposite direction.

[0190] Furthermore, if Fig.14 As shown, the push rod 4101 is provided with a connecting groove 4102 that runs through the thickness direction thereof, and the locking portion 420 includes a locking button 423 and a locking rod 422 connected to the locking button 423, and the locking rod 422 is arranged in the connecting groove 4102. A sawtooth structure 4103 is arranged on one side of the connecting groove 4102, and a slot 411 is formed between two adjacent sawtooth structures 4103. Fig.14 and Fig.15 As shown, the engaging protrusion 421 is configured as a wedge-shaped boss 4221 on both sides of the locking rod 422. When the wedge-shaped boss 4221 is engaged with one of the teeth in the sawtooth structure 4103, the locking rod 422 and the push rod 4101 are locked with each other.

[0191] In addition, a locking part reset element 426, which can be a compression spring, is also provided on the locking rod 422. When the closing gap between the first jaw 101 and the second jaw 107 needs to be adjusted, the push rod 4101 can be pushed, and the teeth in the sawtooth structure 4103 can exert force on the wedge-shaped boss 4221, so that the locking rod 422 goes deeper into the connecting groove 4102, and the wedge-shaped boss 4221 is separated from the corresponding teeth. At this time, the locking rod 422 and the push rod 4101 are mutually unlocked, and when the locking rod 422 goes deeper into the connecting groove 4102, the locking part reset element 426 is compressed and elastic energy is accumulated.

[0192] When the push rod 4101 moves to a suitable position and is released, the locking portion reset element 426 releases elastic energy, causing the locking rod 422 to be slightly ejected from the connecting groove 4102 until the wedge-shaped boss 4221 on the locking rod 422 engages with the corresponding teeth on the serration structure 4103, thereby locking the locking rod 422 and the push rod 4101 with each other.

[0193] Since the sawtooth structure 4103 may include a plurality of teeth, when different teeth of the wedge-shaped boss 4221 are engaged, they may correspond to different closed gaps between the first jaw 101 and the second jaw 107 , thereby being able to adapt to ablation operations on tissues of different thicknesses.

[0194] According to the second aspect of the invention, the present invention also provides an ablation system, which includes the above-mentioned composite ablation forceps and an energy source, which is connected to the transmission component 300. The energy source can be, for example, a cold source, which carries a cold medium, and is connected to the delivery pipeline 301 through a connector 302. The energy source can also be a power source, which is connected to the wire 303 through a plug 304.

[0195] It should be noted that the “distal side” referred to herein refers to the side close to the first jaw 101 and the second jaw 107, and the “proximal side” refers to the side away from the first jaw 101 and the second jaw 107 (e.g. Figure 1 and Fig.13 as shown).

[0196] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A composite ablation forceps, characterized in that: It comprises 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), wherein one of the first jaw assembly (110) and the second jaw assembly (120) is capable of performing an operation of moving relative to the other to change a closed gap between a distal end side of the first jaw assembly (110) and a distal end side of the second jaw assembly (120); The proximal side of the first jaw assembly (110) and the proximal side of the second jaw assembly (120) extend into the holding component (200); one or both of the first jaw assembly (110) and the second jaw assembly (120) are provided with an electrode (130); the electrode (130) is conductively connected to the transmission component (300); the transmission component (300) can provide energy to the electrode (130), so that the distal side of the first jaw assembly (110) and / or the distal side of the second jaw assembly (120) can perform a corresponding ablation operation; The first jaw assembly (110) comprises a first jaw (101) and a first electrode seat (102) connected to the first jaw (101), the second jaw assembly (120) comprises a second jaw (107) and a second electrode seat (108) connected to the second jaw (107), and the electrode (130) comprises a first electrode (131) partially or completely embedded in the first electrode seat (102) and a second electrode (132) partially or completely embedded in the second electrode seat (108); The creepage distance between the first jaw (101) and the first electrode (131) is greater than the electrical gap therebetween; and / or A creepage distance between the second jaw (107) and the second electrode (132) is greater than an electrical gap therebetween; The holding component (200) is provided with a moving drive component (400), and the moving drive component (400) is used to drive the first jaw component (110) or the second jaw component (120) to perform a moving operation; The mobile driving component (400) comprises: a pushing portion (410), which is connected to the proximal side of the first jaw assembly (110) or the proximal side of the second jaw assembly (120), and the pushing portion (410) is provided with at least two slots (411); and A locking portion (420) connected to the holding component (200), and provided with a locking protrusion (421) that is engaged with the locking groove (411); The pushing portion (410) comprises a trigger (415), and the engaging protrusion (421) is caused to slide out of the corresponding engaging groove (411) by squeezing the trigger (415), and the engaging protrusion (421) is further rotated by continuing to squeeze the trigger (415) until the engaging protrusion (421) is engaged in the next groove (411), thereby adjusting the closed gap between the first jaw (101) and the second jaw (107).

2. The composite ablation forceps according to claim 1, characterized in that: The first jaw (101) is connected to the first electrode holder (102) in the following manner: The first electrode seat (102) is entirely located in the first jaw (101); A portion of the first electrode seat (102) is located in the first jaw (101); or A portion of the first jaw (101) is located in the first electrode seat (102); When the first electrode seat (102) as a whole or a part thereof is located in the first jaw (101), one or more insulating grooves (1021) are provided on the first electrode seat (102), and each insulating groove (1021) extends from an end of the first electrode seat (102) in a direction toward the first jaw (101).

3. The composite ablation forceps according to claim 1, characterized in that: A cryogenic fluid inlet and reflux assembly (140) is also provided in one or both of the first jaw assembly (110) and the second jaw assembly (120). The cryogenic fluid inlet and reflux assembly (140) is fluidically connected to the transmission component (300). The transmission component (300) can provide energy to the cryogenic fluid inlet and reflux assembly (140) so that the distal side of the first jaw assembly (110) and / or the distal side of the second jaw assembly (120) can perform corresponding ablation operations.

4. The composite ablation forceps according to claim 3, characterized in that: The refrigeration fluid inlet and return assembly (140) comprises: A core tube (141), the core tube (141) defining an inlet flow passage, the inlet flow passage being in fluid communication with the transmission component (300) to perform an operation of conveying an inlet fluid; an insulating inner tube (142) located outside the core tube (141), wherein the inner wall of the insulating inner tube (142) and the outer wall of the core tube (141) define a first reflux passage, wherein the first reflux passage is in fluid communication with the transmission component (300) to perform an operation of conveying reflux fluid; an insulating outer tube (143) located outside the insulating inner tube (142); and The cryoprobe outer tube (144) is connected to the distal ends of the insulating inner tube (142) and the insulating outer tube (143); the distal end of the core tube (141) extends into the cryoprobe outer tube (144); the outer wall of the core tube (141) and the inner wall of the cryoprobe outer tube (144) define a second reflux passage, and the second reflux passage is fluidically connected to the inlet passage.

5. The composite ablation forceps according to claim 4, characterized in that: The first jaw assembly (110) further comprises an outer tube (103) fixedly connected to the first jaw (101) and the holding component (200) respectively, and an insulating sleeve (105) penetrating the outer tube (103), wherein the heat-insulating outer tube (143) is arranged in the insulating sleeve (105); The second jaw assembly (120) further includes an inner tube (106) disposed in the outer tube (103), and the insulating sleeve (105) passes through the inner tube (106); wherein the distal end side of the inner tube (106) is connected to the second jaw (107), and the proximal end side of the inner tube (106) extends into the holding component (200), and the inner tube (106) is capable of performing an operation of moving along its axis relative to the outer tube (103).

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

7. The composite ablation forceps according to claim 1, characterized in that: It also includes a distance detection device (500) for detecting the size of the closed gap, the distance detection device (500) comprising: A scale layer (510) located on a side wall of one of the first jaw assembly (110) and the second jaw assembly (120); a distance sensor (520) located inside the holding component (200) and at a position corresponding to the proximal side of one of the first jaw assembly (110) and the second jaw assembly (120); or A sliding resistor (530) is located inside the holding component (200) and is connected to the proximal side of the movable one of the first jaw assembly (110) and the second jaw assembly (120).

8. The composite ablation forceps according to claim 2, characterized in that: One or more of the first electrode seat (102), the second electrode seat (108), the first electrode (131), and the second electrode (132) is provided with: a pressure sensor and / or a liquid injection hole.

9. An ablation system, comprising the composite ablation forceps according to any one of claims 1 to 8, characterized in that: Also included is an energy source, the energy source being connected to the transmission component (300); The transmission component (300) is capable of performing one or more of the following operations: delivering refrigeration energy to the refrigeration fluid inlet and return assembly (140); delivering radiofrequency energy to the electrode (130); and delivering pulsed electric field energy to the electrode (130); The distal side of the first jaw assembly (110) and / or the distal side of the second jaw assembly (120) is enabled to sequentially perform one of cryoablation, radiofrequency ablation and pulsed electric field ablation, or to simultaneously perform multiple operations of cryoablation, radiofrequency ablation and pulsed electric field ablation.

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