Composite ablation forceps

Abstract

The invention relates to composite ablation forceps, and relates to the technical field of ablation. The combined ablation forceps comprise a clamping component and a holding component, and the near end side of the clamping component extends into the holding component from one side of the holding component. The clamping component comprises a first jaw assembly and a second jaw assembly, and a closing gap between the far-end side of the first jaw assembly and the far-end side of the second jaw assembly can be changed so as to perform ablation operation on different ablation sites.

Description

[0001] This application is a divisional application of Chinese patent CN 202411729912.2, whose application date is November 28, 2024, and whose name is "Compound ablation forceps and ablation system". Technical Field

[0002] The present invention relates to the technical field of ablation, and in particular to a composite ablation forceps. Background Art

[0003] Atrial fibrillation is the most common sustained 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 a normal person's heartbeat, but also absolutely irregular, and the atria lose their effective contraction function.

[0004] Currently, atrial fibrillation treatment typically involves clamping the abnormal myocardial tissue with the jaws of an ablation forceps and releasing cryoablation, radiofrequency, or pulsed electric field energy into the myocardial tissue. This destroys the abnormal myocardial cells within the jaws, or induces irreversible electroporation in the cell membrane, ultimately leading to cell apoptosis. However, due to structural limitations, existing ablation forceps are generally limited to delivering a single energy source: cryoablation, radiofrequency ablation, or pulsed electric field ablation. This can lead to incomplete ablation of lesions covering large and sensitive areas. Summary of the Invention

[0005] The present invention provides a composite ablation forceps for solving at least one of the above-mentioned technical problems.

[0006] The present invention provides a composite ablation forceps, comprising a clamping component and a gripping component;

[0007] The clamping member includes a first jaw assembly and a second jaw assembly;

[0008] The first jaw assembly includes a first jaw and an outer tube fixedly connected to the first jaw and the gripping member respectively;

[0009] The second jaw assembly includes a second jaw and an inner tube disposed in the outer tube, wherein the distal end of the inner tube is connected to the second jaw, and the proximal end of the inner tube extends into the gripping member;

[0010] The gripping component is provided with a mobile driving assembly, and the mobile driving assembly includes:

[0011] a pushing portion comprising a connecting rod, a trigger rotatably connected to the connecting rod, a slider rotatably connected to the connecting rod, a boss disposed on an upper side of the trigger, and at least two slots disposed on the boss, wherein the slider is sleeved on the inner tube and fixedly connected to the proximal end of the inner tube; and

[0012] a locking portion connected to the holding component and provided with a locking protrusion that engages with the locking groove;

[0013] When the trigger is gripped and rotated counterclockwise, the engaging protrusion slides out of the corresponding engaging groove, and the trigger pushes the connecting rod and the slider, so that the inner tube drives the second jaw to move relative to the first jaw;

[0014] Continue to squeeze the trigger to further rotate the engaging protrusion until the engaging protrusion is engaged in the next groove, thereby adjusting the closing gap between the first jaw and the second jaw.

[0015] In one embodiment, when the trigger is in the initial state, the engaging protrusion is located on the side of the engaging groove closest to the distal end;

[0016] When the locking protrusion is locked in the slot closest to the distal side, the closed gap between the first jaw and the second jaw is the largest; when the locking protrusion is locked in the slot farthest from the distal side, the closed gap between the first jaw and the second jaw is the smallest.

[0017] In one embodiment, an acute angle α1 is formed between the two side walls of the clamping slot and the moving direction of the second jaw, and an acute angle α2 is formed between the clamping protrusion and the moving direction of the second jaw;

[0018] Among them, α2 is smaller than α1, so that when the trigger rotates counterclockwise, the engaging protrusion can slide out of the slot and slide into the corresponding next slot; when the trigger rotates clockwise, the engaging protrusion cannot slide out of the slot.

[0019] In one embodiment, the trigger further includes a push portion reset element, wherein the push portion reset element includes a first tension spring, one end of the first tension spring is rotatably connected to a pin on the trigger;

[0020] When the trigger rotates counterclockwise, the first tension spring is stretched to store elastic energy; when the force acting on the trigger is removed, the first tension spring releases the elastic energy, thereby causing the trigger to rotate clockwise.

[0021] In one embodiment, the locking portion includes a locking rod, the engaging protrusion is located on the proximal end side of the locking rod, a first pin on the locking rod is connected to a locking portion reset element, and the locking portion reset element includes a second tension spring, and the second tension spring is capable of applying a tensile force to the locking rod;

[0022] When the trigger rotates, under the action of the tension of the second tension spring, the engaging protrusion moves on the boss, and the locking lever rotates accordingly;

[0023] When the engaging protrusion moves to the engaging slot on the boss, the second tension spring releases elastic energy, the locking rod rotates in the opposite direction, and the engaging protrusion is engaged in the corresponding engaging slot, so that the locking portion and the pushing portion are locked with each other.

[0024] In one embodiment, the length of the second tension spring is smaller than the length of the first tension spring.

[0025] In one embodiment, the gripping member includes a right shell and a left shell that are snap-fitted to each other;

[0026] The trigger is rotatably connected to the right housing and the left housing via a third pin shaft, and the locking lever is rotatably connected to the right housing and the left housing via a fifth pin shaft.

[0027] In one embodiment, the locking portion further includes a locking button, the locking button being rotatably connected to the distal end of the locking rod, the locking button being provided with a first pin, and one end of the second tension spring being connected to the first pin;

[0028] Wherein, the fifth pin shaft and the engaging protrusion are respectively located on both sides of the first pin shaft.

[0029] In one embodiment, limiting ribs are provided on the inner walls of the right shell and the left shell, the first limiting rib on the inner wall of the right shell abuts against the corresponding limiting rib on the inner wall of the left shell, and the second limiting rib on the inner wall of the right shell abuts against the corresponding limiting rib on the inner wall of the left shell, thereby limiting the trigger between the left shell and the right shell.

[0030] In one embodiment, the device further comprises a distance detection device for detecting the size of the closed gap, wherein the distance detection device comprises a distance sensor located at a proximal end of the slider; or

[0031] The distance detection device includes a resistor located on the right housing. The resistor and the slider form a sliding resistor. The resistor can convert the movement distance of the slider and the inner tube into an electrical signal.

[0032] 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 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, thereby avoiding accidental injury to normal tissue and ensuring more thorough ablation treatment.

[0033] Adding scales, position sensors, and pressure sensors allows the operator to more intuitively observe the clamping status of the ablated tissue, reducing the doctor's subjective experience judgment and improving the operator's surgical experience and surgical accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0035] Figure 1 is a schematic diagram of the three-dimensional structure of the composite ablation forceps in Example 1 of the present invention;

[0036] Figure 2 is an exploded view of the first jaw assembly and the second jaw assembly in Example 1 of the present invention;

[0037] Figure 3 is a cross-sectional view of the composite ablation forceps in Example 1 of the present invention;

[0038] Figure 4 is a schematic diagram of the three-dimensional structure of the first electrode in Example 1 of the present invention;

[0039] Figure 5 yes Figure 4 Cross-sectional view at AA;

[0040] Figure 6a yes Figure 1 a cross-sectional view of the first jaw assembly and the second jaw assembly;

[0041] Figure 6b is a cross-sectional view of a first jaw assembly and a second jaw assembly according to another embodiment of the present invention;

[0042] Figure 7a yes Figure 3 Only a schematic diagram of the gripping part is shown, wherein the locking portion is in the unlocked state;

[0043] Figure 7b yes Figure 7a Enlarged view at point B;

[0044] Figure 7c 2 is a schematic structural diagram of the engaging protrusion and the boss in an embodiment of the present invention;

[0045] Figure 8aThis is a schematic structural diagram of a first jaw having a scale layer in Example 1 of the present invention;

[0046] Figure 8b 1 is a schematic diagram of a structure in which a distance sensor is provided in the gripping component in Example 1 of the present invention, wherein the locking portion is in a locked state;

[0047] Figure 8c yes Figure 8b Enlarged view at point C;

[0048] Figure 8d 1 is a schematic diagram of the structure of a sliding rheostat provided in the gripping component in Example 1 of the present invention, wherein the locking portion is in an unlocked state;

[0049] Figure 8e yes Figure 8d Enlarged view at D;

[0050] Figure 9a is a structural schematic diagram of a pressure sensor disposed on top of the second electrode in Example 1 of the present invention;

[0051] Figure 9b is a structural schematic diagram of a pressure sensor provided at the bottom of the second electrode in Example 1 of the present invention;

[0052] Figure 9c 1 is a schematic structural diagram of a pressure sensor disposed at the bottom of the second electrode holder in Example 1 of the present invention;

[0053] Figure 10a 、 Figure 10b and Figure 10c 1 is a schematic structural diagram of the connection between the first jaw and the first electrode holder in Example 1 of the present invention;

[0054] Figure 11 1 is a schematic structural diagram of a first electrode provided with a liquid injection hole in Example 1 of the present invention;

[0055] Figure 12 1 is a schematic structural diagram of a first electrode base provided with a liquid injection hole in Example 1 of the present invention;

[0056] Figure 13 is a schematic diagram of the three-dimensional structure of the composite ablation forceps in Example 2 of the present invention;

[0057] Figure 14 2 is a schematic structural diagram of the cooperation between the pushing portion and the locking portion in Example 2 of the present invention;

[0058] Figure 15 is a schematic structural diagram of a locking portion in Example 2 of the present invention;

[0059] Figure 16 2 is a schematic structural diagram of the unlock button in Example 2 of the present invention.

[0060] Reference numerals:

[0061] 100, clamping component; 200, holding component; 300, transmission component; 400, mobile drive assembly; 500, distance detection device;

[0062] 110, first jaw assembly; 120, second jaw assembly; 130, electrode; 140, cryogenic fluid inlet and return assembly;

[0063] 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, injection hole;

[0064] 1011, first connecting section; 1012, first accommodating section; 1013, movable groove;

[0065] 1071. Second connecting section; 1072. Second accommodating section;

[0066] 1021, insulation groove;

[0067] 131. Electrode; 131. First electrode; 132. Second electrode; 133. Receiving groove;

[0068] 141. Core tube; 142. Insulated inner tube; 143. Insulated outer tube; 144. Cryoprobe outer tube; 145. Insulated connector; 146. Blocking piece;

[0069] 210, right housing; 220, left housing;

[0070] 211, first limiting rib; 212, second limiting rib; 213, support seat;

[0071] 301, delivery pipeline; 302, connector; 303, wire; 304, plug;

[0072] 410, pushing portion; 411, slot; 412, connecting rod; 413, slider; 414, second pin; 415, trigger; 416, sixth pin; 417, boss; 418, third pin; 419, fourth pin;

[0073] 420, locking portion; 421, engaging protrusion; 422, locking lever; 423, locking button; 424, first pin; 425, fifth pin; 426, locking portion reset element;

[0074] 4221, wedge-shaped boss;

[0075] 4261, second tension spring; 4262, second connecting column;

[0076] 430, jaw resetting element;

[0077] 440, push portion reset element; 441, first tension spring; 442, first connecting column;

[0078] 4101, push rod; 4102, connecting groove; 4103, serrated structure; 4104, push button;

[0079] 510, scale layer; 520, distance sensor; 530, sliding rheostat. DETAILED DESCRIPTION

[0080] The present invention will be further described below with reference to the accompanying drawings.

[0081] According to the 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 .

[0082] The distal end of the clamping component 100 is capable of clamping the diseased tissue or area and performing corresponding ablation operations as needed. Specifically, the clamping component 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 is capable of performing 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 to target different ablation sites. In particular, the clamping component 100 is suitable for ablation operations targeting myocardial tissue. Since the thickness of myocardial tissue varies from patient to patient (for example, the thickness of myocardial tissue varies significantly between people of different age groups), by changing the closed gap, myocardial tissue of different thicknesses can be clamped with uniform force to avoid situations where a closed gap that is too small and thus injures the tissue, or a gap that is too large and thus results in insufficient ablation.

[0083] like Figure 1 and Figure 3 As shown, the proximal end of the clamping member 100 extends into the gripping member 200 from one side thereof, and the transmission member 300 extends into the gripping member 200 from the other side thereof, thereby connecting the proximal end of the clamping member 100 to the transmission member 300. The transmission member 300 can transmit various ablation energies, such as cryoenergy, thermal energy, and pulsed electric field energy, to the clamping member 100, so that the distal end of the clamping member 100 can perform corresponding ablation operations on the diseased tissue or area as needed.

[0084] Specifically, if Figure 2 and Figure 3As shown, the proximal side of the first jaw assembly 110 and the proximal side of the second jaw assembly 120 extend into the gripping 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.

[0085] Optionally, the transmission component 300 can deliver cryoenergy to the cryofluid inlet and return 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 of the first jaw assembly 110 and / or the distal end of the second jaw assembly 120 can sequentially perform one of cryoablation, radiofrequency ablation, and pulsed electric field ablation. For example, the distal end of the first jaw assembly 110 and / or the distal end of the second jaw assembly 120 can sequentially perform cryoablation, radiofrequency ablation, and pulsed electric field ablation.

[0086] Optionally, the transmission component 300 can transmit cryoenergy to the cryofluid inlet and return assembly 140 and / or the transmission component 300 can transmit one or both of thermal energy and pulsed electric field energy to the electrode 130, so that the distal end of the first jaw assembly 110 and / or the distal end of the second jaw assembly 120 can simultaneously perform multiple operations of cryoablation, radiofrequency ablation, and pulsed electric field ablation. For example, the distal end of the first jaw assembly 110 and / or the distal end of the second jaw assembly 120 can simultaneously perform cryoablation and pulsed electric field ablation operations, or the distal end of the first jaw assembly 110 and / or the distal end of the second jaw assembly 120 can simultaneously perform radiofrequency ablation and pulsed electric field ablation operations.

[0087] 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 return 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.

[0088] 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 release multiple combinations of energies. For example, when performing radiofrequency ablation, cooling water can be simultaneously input into the cryofluid inlet and return assembly 140 to avoid overheating of the surrounding tissue of the lesion area and to cool the clamping component 100.

[0089] like Figure 2 As shown, a refrigerated fluid inlet and return assembly 140 is constructed in the first jaw assembly 110 or the second jaw assembly 120. More specifically, the refrigerated 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 refrigerated fluid inlet and return assembly 140 when the corresponding jaw assembly is moved, thereby causing leakage of the refrigerant.

[0090] 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 return assembly 140 includes a core tube 141 , an insulating inner tube 142 , an insulating outer tube 143 and a cryoprobe outer tube 144 .

[0091] like Figure 4 and Figure 5 As shown, core tube 141 defines an inlet flow path, which is in fluid communication with transmission component 300 to transport the inlet fluid. Insulated inner tube 142 is located outside core tube 141. The inner wall of insulated inner tube 142 and the outer wall of core tube 141 define a first return flow path, which is in fluid communication with transmission component 300 to transport the return fluid. Insulated outer tube 143 is located outside insulated inner tube 142. Therefore, it can be understood that refrigerant fluid inlet and return assembly 140 comprises, from inside to outside, core tube 141, insulated inner tube 142, and insulated outer tube 143.

[0092] like Figure 4 As shown, a thermally insulating connector 145 is fixed to one end of the thermally insulating outer tube 143 and the thermally insulating inner tube 142. A vacuum process is performed between the thermally insulating outer tube 143 and the thermally insulating inner tube 142. After the vacuum process is completed, the ends of the thermally insulating outer tube 143 and the thermally insulating inner tube 142 away from the thermally 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 thermally insulating outer tube 143 and the thermally insulating inner tube 142.

[0093] The cryoprobe outer tube 144 is connected to the distal ends of the insulated inner tube 142 and the insulated outer tube 143 via the insulated connector 145, and is in fluid communication with the insulated inner tube 142 via 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 return flow path, which is in fluid communication with the inlet flow path.

[0094] The distal end of the cryoprobe outer tube 144 is sealed by a blocking member 146. Therefore, the fluid in the core tube 141 can flow out of 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 return path. The second return path is also fluidically connected to the first return path, so the fluid can return to the transmission component 300 along the second return path and the first return path.

[0095] like Figure 4 As shown, the outer tube 144 of the cryoprobe is the part where cryoablation can be performed. It can be bent together with the core tube 141 into a shape consistent with the shape of the distal end side of the first jaw assembly 110 to facilitate clamping.

[0096] 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 path to the distal side of the core tube 141. The fluid flows into the space between the core tube 141 and the cryoprobe outer tube 144 at the distal side of the core tube 141, that is, returns along the second return path. Therefore, it can exchange heat with the myocardial tissue at the cryoprobe outer tube 144, thereby performing ablation treatment. The fluid after heat exchange enters the first return path along the second return path and flows into the return structure of the transmission component 300 for recycling. Since the first return path 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 outside the insulating inner tube 142 by setting the insulating outer tube 143, it can be seen that the part where the first return path is located is an insulating part, so that this part will not exchange heat with the environment, thereby ensuring the safety of operation.

[0097] In addition, it is conceivable that a heat-insulating material may be provided between the heat-insulating outer tube 143 and the heat-insulating inner tube 142 to achieve heat insulation therebetween.

[0098] Please continue to see Figure 2 and Figure 6aAs shown, 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 arranged opposite each other to clamp corresponding tissues. 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.

[0099] 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 freezing probe.

[0100] 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.

[0101] Furthermore, 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.

[0102] In a selected embodiment, as Figure 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 can be provided on the end surface of the first electrode holder 102 opposite to the second electrode holder 108. The insulating groove 1021 extends from the end of the first electrode holder 102 toward the first jaw 101.

[0103] 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. Figure 10aAs shown, in a radial cross-section of first jaw assembly 110, the outer endpoint of first jaw 101 is A, and the inner endpoint where it contacts first electrode holder 102 is B. Due to the provision of insulating groove 1021 on the inner side of first electrode holder 102, its inner endpoint is C. The inner endpoint of insulating groove 1021 is D. The bottom wall of insulating groove 1021 is flush with the end face of first electrode 131, so the endpoint of first electrode 131 is E. The creepage clearance between first jaw 101 and first electrode 131 is AB+BC+CD+DE, and the electrical clearance between them is AB+BC+CE. Therefore, the creepage clearance between first jaw 101 and first electrode 131 is greater than the electrical clearance between them, thereby meeting the electrical insulation requirements.

[0104] like Figure 10a As shown, the second electrode holder 108 can be configured with reference to the structure of the first electrode holder 102. For example, an insulating groove 1021 can also be provided on the end surface of the second electrode holder 108 opposite to the first electrode holder 102. The insulating groove 1021 extends from the end of the second electrode holder 108 toward the second jaw 107, thereby making the creepage clearance between the second jaw 107 and the second electrode 132 greater than the electrical clearance between the two.

[0105] 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 .

[0106] Figure 10a The diagram shows a case 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 .

[0107] In an optional embodiment, as Figure 10b As shown, a portion of the first electrode holder 102 is located in the first jaw 101. Figure 10b As shown, a portion of the first electrode holder 102 extends into the first jaw 101, while 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, 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 the second electrode holder 108. The insulating groove 1021 extends from the end of the first electrode holder 102 toward the first jaw 101.

[0108] like Figure 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 .

[0109] 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. Figure 10b As shown, in a radial cross-section of the first jaw assembly 110, the contact endpoint between the outer side of the first jaw 101 and the first electrode holder 102 is F, the outer side endpoint of the first electrode holder 102 is G, the inner side endpoints of the insulating groove 1021 are I and J, respectively, and the outer and inner side endpoints of the insulating groove 1021 are H and K, respectively. The end of the first electrode holder 102 is flush with the end surface of the first electrode 131, so the contact endpoint between the first electrode holder 102 and the first electrode 131 is L. 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. Therefore, 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.

[0110] like Figure 10b As 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. Figure 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 may be provided in 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.

[0111] 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 the 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.

[0112] In an optional embodiment, as Figure 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 gap between the first jaw 101 and the first electrode 131 is greater than the electrical gap between the two, thereby meeting the electrical insulation requirements.

[0113] 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. Alternatively, the second electrode holder 108 may be configured as follows: Figure 6a 、 Figure 10a Or it can be set up in the structural form shown in 10b.

[0114] exist Figure 9a 、 Figure 9b and Figure 9c In the illustrated embodiment, the first electrode 131 is configured to have a rectangular radial cross-section with a groove provided thereon to facilitate fitting of the cryoprobe outer tube 144. It is understood that the first electrode 131 may be configured to have other cross-sections.

[0115] like Figure 6b As shown, the first electrode 131 is constructed to have a circular cross-section and 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 is exposed outside the first electrode holder 102, thereby facilitating heat exchange between the first electrode 131 and the tissue.

[0116] Alternatively, it is conceivable that a depression may be provided on the first electrode holder 102 , and the first electrode 131 is completely embedded in the first electrode holder 102 . When clamping tissue, the tissue may be clamped into the depression for ablation.

[0117] Please continue to see Figure 6b The second electrode 132 can also be configured to have a circular cross-section and can also be partially or completely embedded in the second electrode holder 108 .

[0118] One or more of the first electrode holder 102 , the second electrode holder 108 , the first electrode 131 and the second electrode 132 may be provided with: a pressure sensor and / or a liquid injection hole.

[0119] In some embodiments, as Figure 9a As shown, a pressure sensor 104 is provided on the second electrode 132. There may be multiple pressure sensors 104, each of which is provided on the upper side of the second electrode 132 (i.e., on 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 pressure sensor 104 can monitor the clamping force applied to the tissue, thereby preventing the problem of excessive clamping force affecting normal tissue or insufficient clamping force resulting in insufficient ablation.

[0120] In some embodiments, as Figure 9bAs 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.

[0121] In some embodiments, as Figure 9c As shown, a plurality of pressure sensors 104 are respectively arranged at the bottom of the second electrode holder 108, which can also realize the monitoring of the clamping force.

[0122] 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 Figure 9c Set up as shown.

[0123] In some embodiments, as Figure 11 As shown, a plurality of injection holes 109 are provided on the first electrode 131, through which liquid can be sprayed onto the clamped tissue, so that the ablation effect on the tissue is better during radiofrequency ablation or pulse ablation. In addition, the sprayed liquid can also play a cooling role and prevent the tissue from carbonizing and sticking to the electrode during radiofrequency ablation, thereby avoiding affecting the ablation effect.

[0124] In some embodiments, as Figure 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 spraying.

[0125] 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, which may be arranged in accordance with the Figure 11 and Figure 12 Set it up as shown.

[0126] As described above, the first jaw assembly 110 is configured with the cryogenic fluid inlet and return assembly 140 , so the second jaw assembly 120 can move relative to the first jaw assembly 110 , thereby adjusting the closed gap between the distal ends thereof.

[0127] For details, please see 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 gripping component 200 respectively, and an insulating sleeve 105 passing through the outer tube 103 , and the insulating outer tube 143 is disposed in the insulating sleeve 105 .

[0128] Please continue to see Figure 2The 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. Figure 10a 、 Figure 10b and Figure 10c The various ways shown are connected to the first accommodating section 1012 , and the first connecting section 1011 is inserted into the distal side of the outer tube 103 and connected to the distal side of the outer tube 103 .

[0129] 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 end of the inner tube 106. The distal end of the inner tube 106 is connected to the second jaw 107. Figure 2 As 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. Figure 10a 、 Figure 10b and Figure 10c The various ways shown are connected to the second accommodating section 1072 , and the second connecting section 1071 is inserted into the distal side of the inner tube 106 and connected to the distal side of the inner tube 106 .

[0130] In addition, a movable groove 1013 is also provided in the first connecting section 1011, and the movable groove 1013 extends along the extension direction of the first connecting section 1011. The second connecting section 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 parts that can move relative to each other.

[0131] 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 .

[0132] 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 and move relative to the first jaw assembly 110 .

[0133] The movement of the inner tube 106 can be achieved by the movement drive assembly 400 in the gripping member 200. It is understood that the movement drive assembly 400 can also drive the second jaw assembly 120 to perform a movement operation. The movement drive assembly 400 can, for example, move the inner tube 106 by pulling a trigger or by pushing a push rod.

[0134] The composite ablation forceps of the present invention further includes a distance detection device 500 for detecting the size of the 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 .

[0135] 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 8a As shown, the distance detection device 500 is constructed as a scale layer 510 provided 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. Therefore, when the second jaw 107, the second electrode holder 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.

[0136] In an optional embodiment, as Figure 8b As shown, the distance detection device 500 can 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 can be, for example, a laser ranging sensor, which can 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 via a signal to display the size of the closed gap between the first jaw 101 and the second jaw 107. Based on this feedback signal, the host automatically provides the above-mentioned various ablation energy intensities, such as applying different electric field intensities, thereby making the ablation operation more accurate and reliable.

[0137] In an optional embodiment, as Figure 8d As shown, the distance detection device 500 can be a sliding rheostat 530, which is located inside the gripping part 200 and is 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 forms the sliding rheostat 530. When the proximal side of the inner tube 106 moves, the change in resistance causes the current signal to change, thereby calculating the size of the closed gap between the first jaw 101 and the second jaw 107. The sliding rheostat 530 can be connected to a host (not shown) of the ablation system, so that the host can automatically provide the various ablation energy intensities mentioned above according to the current signal, such as applying different electric field intensities, thereby making the ablation operation more accurate and reliable.

[0138] like Figure 3 As shown, the transmission component 300 includes a delivery pipeline 301 , a connector 302 located at an end of the delivery pipeline 301 , an electric wire 303 located in the delivery pipeline 301 , and a plug 304 located at an end of the electric wire 303 .

[0139] 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 and is connected to the delivery pipeline 301 .

[0140] 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.

[0141] 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, thereby releasing radio frequency energy or pulse energy.

[0142] Example 1

[0143] In this embodiment 1, Figure 7a 、 Figure 7b 、 Figure 8b 、 Figure 8c 、 Figure 8d and Figure 8e As shown, the mobile drive assembly 400 can, for example, be configured to move the inner tube 106 by pulling a trigger. Specifically, the mobile drive assembly 400 includes a pusher 410 and a locking portion 420. The pusher 410 is connected to the proximal end of the first jaw assembly 110 or the proximal end of the second jaw assembly 120 and is provided with at least two locking grooves 411. The locking portion 420 is connected to the gripping member 200 and is provided with an engaging protrusion 421 that engages with the engaging grooves 411.

[0144] 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 between the distal ends thereof, and the locking portion 420 engages 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 engages with or separates from the corresponding slot 411 on the pushing portion 410.

[0145] Specifically, if Figure 7a and Figure 7b As shown, please combine Figure 1 The gripping member 200 is constructed in a generally pistol-like structure, comprising a right housing 210 and a left housing 220, which are interlocked and connected. The distal and proximal ends of the housings are provided with holes, respectively, through which the first and second jaw assemblies 110, 120 can be inserted. The transmission member 300 can also be inserted from the distal end of the housing, thereby connecting to the first and second jaw assemblies 110, 120 within the gripping member 200.

[0146] 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 arranged on the upper side of the trigger 415, and at least two slots 411 arranged on the boss 417.

[0147] The outer tube 103 extends into the distal ends of the right and left housings 210, 220 and is fixedly connected to the two housings. The inner tube 106 penetrates the outer tube 103 and extends within the right and left housings 210, 220. The slider 413 is sleeved over the inner tube 106 and fixedly connected to the proximal end of the inner tube 106. When the slider 413 is pushed, it moves the inner tube 106 along its axis relative to the outer tube 103, the right and left housings 210, 220. When the thrust of the slider 413 is released, the inner tube 106 can return in the opposite direction relative to the outer tube 103, the right and left housings 210, 220.

[0148] 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 via the second pin 414. The other end of the connecting rod 412 is rotatably connected to the slider 413 via a sixth pin 416. The trigger 415 is rotatably connected to the right housing 210 and the left housing 220 via a third pin 418.

[0149] Therefore, it can be seen 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 connected in rotation 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.

[0150] like Figure 7aAs shown, the trigger 415 has an opening on the 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 rotated in the counterclockwise direction, 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 closing gap between the first jaw 101 and the second jaw 107.

[0151] The pushing portion 410 is also connected to the pushing portion reset element 440. Figure 7a As 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. The first connecting column 442 can be fixed on the right shell 210.

[0152] Therefore, it can be seen that when a force acts on the trigger 415 to rotate it counterclockwise, the first tension spring 441 is stretched to accumulate elastic energy. At this time, 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 the elastic energy, thereby causing the trigger 415 to rotate clockwise. At this time, 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.

[0153] 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 released, a jaw resetting element 430 may be provided on the inner tube 106. Figure 7a As shown, the jaw resetting element 430 is a compression spring, one end of which is connected to the proximal end 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 move the inner tube 106, the jaw resetting element 430 is compressed and accumulates elastic energy; when the force on the slider 413 is released, the jaw resetting element 430 releases the elastic energy, thereby pushing the slider 413 to move the inner tube 106 in the opposite direction.

[0154] Therefore, it can be imagined that in order to constrain the moving path of the slider 413, corresponding sliding grooves can be set on the right shell 210 and the left shell 220. The sliding grooves can limit and guide the slider 413 to ensure that the slider 413 moves according to the predetermined movement path.

[0155] 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 .

[0156] 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.

[0157] When the inner tube 106 moves to a 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 ablation operation. The above operation can be achieved by the locking portion 420.

[0158] 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 end of the locking rod 422 is provided with a locking protrusion 421 that engages 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 the side of the trigger 415 near the slider 413.

[0159] 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 to each other.

[0160] In addition, the locking rod 422 is also connected to the locking portion reset element 426, as shown in FIG. 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.

[0161] In the initial state, the second tension spring 4261 exerts a tensile force on the locking lever 422, causing the engaging protrusion 421 at the end of the locking lever 422 to abut against the boss 417. When the trigger 415 rotates, the tension of the second tension spring 4261 causes the engaging protrusion 421 to abut against the boss 417 and prevent it from separating. Consequently, the engaging protrusion 421 moves on the boss 417, and the locking lever 422 rotates accordingly. As the locking lever 422 rotates, the second tension spring 4261 accumulates elastic energy. When the engaging protrusion 421 moves along the boss 421 to the engaging groove 411 on the boss 421, the second tension spring 4261 releases the elastic energy, causing the locking lever 422 to rotate in the opposite direction. This causes the engaging protrusion 421 to approach the engaging groove 411 and engage with it, locking the locking portion 420 and the pushing portion 410.

[0162] Specifically, if Figure 7a and Figure 7b As 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.

[0163] When performing an 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 gripped 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 push up the engaging protrusion 421 at the end of the locking rod 422, causing the locking rod 422 to rotate. At the same time, due to the tension of the second tension spring 4261, 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 corresponding engaging groove 411 on the boss 417. At this time, 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 to each other.

[0164] 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 corresponding engaging protrusion 421 is an inclined surface. Therefore, when the trigger 415 is continued to be squeezed, the engaging protrusion 421 can slide out of the corresponding slot 411. The trigger 415 is further squeezed to rotate it until the engaging protrusion 421 is engaged in the next groove 411. Figure 8b and Figure 8c As shown, releasing the trigger 415 again can lock the locking portion 420 and the pushing portion 410 with each other again.

[0165] When the ablation operation is completed, the locking portion 420 and the pushing portion 410 are reset. At this time, the locking button 423 can be pressed, thereby rotating the locking rod 422, and the engaging protrusion 421 at its end leaves the corresponding engaging groove 411, thereby unlocking the locking portion 420 and the pushing portion 410. At this time, the locking button 423 is released, and the locking rod 422 returns to its initial state under the pulling force of the locking portion reset element 426, and the trigger 415 returns to its initial state under the action of the pushing portion reset element 440.

[0166] In addition, if Figure 7a As 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, preventing the trigger 415 from swinging toward the left shell 220 or the right shell 210, thereby making the movement of structures such as the trigger 415, the locking portion 420 and the pushing portion 410 more stable.

[0167] 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).

[0168] When the trigger 415 is rotated counterclockwise to Figure 8d and Figure 8c In the illustrated position of the trigger 415, the engaging protrusion 421 is aligned with the engaging groove 411 closest to the distal end. The engaging protrusion 421 can then be engaged with the engaging groove 411 closest to the distal end, thereby locking the locking portion 420 and the pushing portion 410 together. This locks the closed gap between the first jaw 101 and the second jaw 107 at the current position. This position corresponds to the maximum closed gap between the first jaw 101 and the second jaw 107.

[0169] exist Figure 8d and Figure 8eOn 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 is rotated counterclockwise to its maximum position, at which point the engaging protrusion 421 engages with the engaging groove 411 furthest from the distal end (i.e., the last engaging groove), thereby locking the locking portion 420 and the pushing portion 410. This locks the closed gap between the first jaw 101 and the second jaw 107 at the current position. This position corresponds to the minimum closed gap between the first jaw 101 and the second jaw 107.

[0170] The number of the slots 411 can be set accordingly according to the closed gap that needs to be adjusted. The greater the number of the slots 411 , the higher the precision of the closed gap that can be adjusted.

[0171] Further, if Figure 7b and Figure 8c As shown, the side wall of the card slot 411 can be constructed as an inclined side wall, and a corresponding end face of the locking protrusion 421 can be set as an inclined face, so that the end of the locking protrusion 421 forms a wedge-shaped structure, so that the locking protrusion 421 can be smoothly locked into the corresponding card slot 411.

[0172] Specifically, if Figure 7c As shown, please combine Figure 7b , an acute angle α1 is formed 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), and an acute angle α2 is formed 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), and α2 is smaller than α1, 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.

[0173] 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 .

[0174] Example 2

[0175] In this embodiment 2, Figure 13 、 Figure 14 、 Figure 15 and Figure 16 As shown, the moving drive assembly 400 can move the inner tube 106 by moving a push rod, for example.

[0176] 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 is provided with at least two slots 411 (see Figure 14 The locking portion 420 is connected to the gripping member 200 , and is provided with a locking protrusion 421 that engages with the locking groove 411 .

[0177] like Figure 13 As shown, in this embodiment 2, the gripping component 200 is generally in the form of a syringe structure, which can also include a right shell 210 and a left shell 220, which can be snap-fitted together.

[0178] 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 side of the two, and the locking portion 420 performs the operation of engaging with the corresponding slot 411 on the pushing portion 410.

[0179] 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 .

[0180] like Figure 14 As shown, the pushing portion 410 is constructed in the form 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 to facilitate pushing the push rod 4101. The jaw resetting element 430 is connected to the proximal end of the inner tube 106; the other end of the push rod 4101 is provided with a push button. Pressing the push button causes the push rod 4101 to compress the jaw resetting element 430, which accumulates elastic energy and pushes the inner tube 106 along its axis. When the force on the push button is removed, the jaw resetting element 430 releases the elastic energy, causing the push rod 4101 and the inner tube 106 to move in opposite directions.

[0181] Further, if Figure 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. The locking rod 422 is arranged in the connecting groove 4102. A sawtooth structure 4103 is provided on one side of the connecting groove 4102, and a slot 411 is formed between two adjacent sawtooth structures 4103. Figure 14 and Figure 15As shown, the engaging protrusion 421 is constructed 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.

[0182] In addition, the locking rod 422 is provided with a locking portion reset element 426, which can be a compression spring. 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 serration structure 4103 can exert a force on the wedge-shaped boss 4221, thereby causing the locking rod 422 to penetrate deeper into the connecting groove 4102. The wedge-shaped boss 4221 then separates from the corresponding teeth. At this time, the locking rod 422 and the push rod 4101 are mutually unlocked. When the locking rod 422 penetrates deeper into the connecting groove 4102, the locking portion reset element 426 is compressed, accumulating elastic energy.

[0183] 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 to each other.

[0184] 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 adapting to ablation operations on tissues of different thicknesses.

[0185] According to a second aspect of the invention, the present invention further provides an ablation system comprising the aforementioned composite ablation forceps and an energy source connected to a transmission component 300. The energy source may be, for example, a cold source carrying a cold medium, which is connected to a delivery pipeline 301 via a connector 302. The energy source may also be a power source, which is connected to an electrical wire 303 via a plug 304.

[0186] 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 Figure 13 shown).

[0187] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A composite ablation forceps, characterized in that: It comprises a clamping component (100) and a holding component (200); The clamping component (100) includes a first jaw assembly (110) and a second jaw assembly (120); The first jaw assembly (110) comprises a first jaw (101) and an outer tube (103) fixedly connected to the first jaw (101) and the gripping component (200) respectively; The second jaw assembly (120) comprises a second jaw (107) and an inner tube (106) disposed in the outer tube (103), wherein the distal end of the inner tube (106) is connected to the second jaw (107), and the proximal end of the inner tube (106) extends into the gripping member (200); The gripping component (200) is provided with a moving drive assembly (400), and the moving drive assembly (400) comprises: A pushing portion (410), comprising a trigger (415) and at least two slots (411); and A locking portion (420) connected to the holding component (200), and provided with a locking protrusion (421) that engages with the locking groove (411); When the trigger (415) is gripped, the engaging protrusion (421) slides out of the corresponding engaging groove (411), so that the inner tube (106) drives the second jaw (107) to move relative to the first jaw (101); Continue to squeeze the trigger (415) to further rotate the engaging protrusion (421) until the engaging protrusion (421) engages in the next groove (411), thereby adjusting the closing gap between the first jaw (101) and the second jaw (107).

2. The composite ablation forceps according to claim 1, characterized in that: When the trigger (415) is in the initial state, the engaging protrusion (421) is located on the side of the engaging groove (411) closest to the distal end; When the engaging protrusion (421) is engaged in the engaging groove (411) closest to the distal end, the closed gap between the first jaw (101) and the second jaw (107) is the largest; when the engaging protrusion (421) is engaged in the engaging groove (411) farthest from the distal end, the closed gap between the first jaw (101) and the second jaw (107) is the smallest.

3. The composite ablation forceps according to claim 1 or 2, characterized in that: An acute angle α1 is formed between the two side walls of the clamping slot (411) and the moving direction of the second jaw (107), and an acute angle α2 is formed between the clamping protrusion (421) and the moving direction of the second jaw (107); Wherein, α2 is smaller than α1, so that when the trigger (415) rotates counterclockwise, the engaging protrusion (421) can slide out of the engaging slot (411) and slide into the corresponding next engaging slot (411); when the trigger (415) rotates clockwise, the engaging protrusion (421) cannot slide out of the engaging slot (411).

4. The composite ablation forceps according to claim 1 or 2, characterized in that: The pushing portion (410) includes: a connecting rod (412) rotatably connected to the trigger (415); A slider (413) is rotatably connected to the connecting rod (412), and the slider (413) is sleeved on the inner tube (106) and fixedly connected to the proximal end of the inner tube (106); and A boss (417) is located on the upper side of the trigger (415), and the at least two slots (411) are provided on the boss (417).

5. The composite ablation forceps according to claim 4, characterized in that: It also includes a push portion reset element (440), the push portion reset element (440) includes a first tension spring (441), one end of the first tension spring (441) is rotatably connected to a pin on the trigger (415); When the trigger (415) is rotated counterclockwise, the first tension spring (441) is stretched to accumulate elastic energy; when the force acting on the trigger (415) is removed, the first tension spring (441) releases the elastic energy, thereby causing the trigger (415) to rotate clockwise.

6. The composite ablation forceps according to claim 5, characterized in that: The locking portion (420) includes a locking rod (422), the engaging protrusion (421) is located on the proximal side of the locking rod (422), the first pin (424) on the locking rod (422) is connected to the locking portion reset element (426), and the locking portion reset element (426) includes a second tension spring (4261), and the second tension spring (4261) can apply a pulling force to the locking rod (422); When the trigger (415) rotates, under the action of the tension of the second tension spring (4261), the engaging protrusion (421) moves on the boss (417), and the locking rod (422) rotates accordingly; When the engaging protrusion (421) moves on the boss (417) to the engaging groove (411), the second tension spring (4261) releases elastic energy, the locking rod (422) rotates in the opposite direction, and the engaging protrusion (421) is engaged in the corresponding engaging groove (411), thereby locking the locking portion (420) and the pushing portion (410) with each other.

7. The composite ablation forceps according to claim 6, characterized in that: The length of the second tension spring (4261) is smaller than the length of the first tension spring (441).

8. The composite ablation forceps according to claim 6, characterized in that: The gripping component (200) comprises a right shell (210) and a left shell (220) that are buckled and connected to each other; The trigger (415) is rotatably connected to the right housing (210) and the left housing (220) via a third pin shaft (418), and the locking lever (422) is rotatably connected to the right housing (210) and the left housing (220) via a fifth pin shaft (425).

9. The composite ablation forceps according to claim 8, characterized in that: The locking portion (420) further includes a locking button (423), the locking button (423) being rotationally connected to the distal end of the locking rod (422), a first pin (424) being provided on the locking button (423), and one end of the second tension spring (4261) being connected to the first pin (424); Wherein, the fifth pin shaft (425) and the engaging protrusion (421) are respectively located on both sides of the first pin shaft (424).

10. The composite ablation forceps according to claim 8, characterized in that: Limiting ribs are provided on the inner walls of the right housing (210) and the left housing (220); a first limiting rib (211) on the inner wall of the right housing (210) abuts against a corresponding limiting rib on the inner wall of the left housing (220); and a second limiting rib (212) on the inner wall of the right housing (210) abuts against a corresponding limiting rib on the inner wall of the left housing (220), thereby limiting the trigger (415) between the left housing (220) and the right housing (210).

11. The composite ablation forceps according to claim 8, characterized in that: It also includes a distance detection device (500) for detecting the size of the closed gap, wherein the distance detection device (500) includes a distance sensor (520) located at a proximal end position of the slider (413); or The distance detection device (500) includes a resistor located on the right housing (210), the resistor and the slider (413) forming a sliding rheostat (530), and the resistor can convert the movement distance of the slider (413) and the inner tube (106) into an electrical signal.

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