Closer tong head and closer

Abstract

The invention provides a closer tong head and a closer. The closer tong head comprises two clamp arms which can move relatively to clamp tissue. At least one clamp comprises a clamp seat, an electrode, a supporting structure arranged in the clamp seat and used for supporting the electrode, and a first heat insulation layer arranged between the electrode and the clamp seat. At least part of the clamp seat, at least part of the first heat insulation layer and at least part of the electrode are sequentially and adjacently arranged to form a clamping face of the clamp arm, and the supporting structure and at least the part, making contact with the electrode, of the first heat insulation layer are arranged in an insulated mode. According to the closer clamp head and the closer, heat can be generated to close tissues when the electrodes are electrified, and through the arrangement of the first heat insulation layer, the heat can be concentrated at the tissues needing to be closed and is prevented from being dissipated to other tissues, so that heat damage to the other tissues is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and more specifically, relates to a stapler head and a stapler. Background Art

[0002] In surgical operations, with the aid of surgical energy and clamping pressure, the fusion and closure of tissues can be achieved quickly, reducing the use of indwelling items such as sutures and hemostatic clips, and improving the surgical efficiency. After the fusion and closure of tissues, the blood vessels in the tissues are sealed, and then the target tissue is safely separated by mechanical disconnection (such as using a push knife) or electro-surgery (such as using an electrode to generate heat).

[0003] However, during the use of surgical instruments, such as the electro-surgical stapler head, a great deal of heat will be generated to fuse and close the target tissue, which will cause the tissues around the target tissue to absorb more heat, resulting in the risk of tissue thermal injury. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a stapler head and a stapler, so as to solve the technical problem of tissue thermal injury caused by the heat generated by the stapler head in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a stapler head, including two clamp arms that can move relative to each other to clamp tissues. At least one of the clamp arms includes a clamp seat, an electrode, a support structure disposed in the clamp seat and used to support the electrode, and a first heat insulation layer disposed between the electrode and the clamp seat. At least a part of the clamp seat, at least a part of the first heat insulation layer, and at least a part of the electrode are arranged adjacent to each other in sequence to form the clamping surface of the clamp arm. At least the part of the support structure in contact with the electrode is insulated, and at least the part of the first heat insulation layer in contact with the electrode is insulated.

[0006] Optionally, the nominal diameter of the stapler head is 2 mm to 6 mm, and the sum of the thicknesses of at least a part of the clamp seat and at least a part of the first heat insulation layer in the direction of adjacent arrangement in sequence ranges from 0.1 mm to 2 mm; the nominal diameter of the stapler head is 7.5 mm to 9 mm, and the sum of the thicknesses of at least a part of the clamp seat and at least a part of the first heat insulation layer in the direction of adjacent arrangement in sequence ranges from 0.1 mm to 4 mm.

[0007] Optionally, the nominal diameter of the stapler head is 2 mm to 6 mm; the thickness range of at least a part of the clamp seat in the direction perpendicular to the extension direction of the clamp arm is 0.1 mm to 1 mm, and / or, the thickness range of at least a part of the first heat insulation layer in the direction perpendicular to the extension direction of the clamp arm is 0.03 mm to 1 mm.

[0008] Optionally, the nominal diameter of the closure head is 7.5 mm to 9 mm, the thickness of at least a part of the clamp seat in a direction perpendicular to the extending direction of the clamp arm ranges from 0.1 mm to 2 mm, and the thickness of at least a part of the first heat insulation layer in a direction perpendicular to the extending direction of the clamp arm ranges from 0.03 mm to 2 mm.

[0009] Optionally, the clamp seat is made of metal or a material with a high thermal conductivity coefficient, and the clamp seat can be used for heat dissipation.

[0010] Optionally, heat dissipation protrusions are provided on the surface of the clamp seat.

[0011] Optionally, the clamp seat is a second heat insulation layer, the clamp arm further includes a heat dissipation layer, and at least a part of the clamp seat, at least a part of the heat dissipation layer, at least a part of the first heat insulation layer, and at least a part of the electrode are arranged adjacent to each other in sequence to form a clamping surface of the clamp arm.

[0012] Optionally, the nominal diameter of the closure head is 2 mm to 6 mm, and the range of the sum of the thicknesses of at least a part of the clamp seat, at least a part of the heat dissipation layer, and at least a part of the first heat insulation layer in a direction perpendicular to the extending direction of the clamp arm is 0.25 mm to 3 mm; the nominal diameter of the closure head is 7.5 mm to 9 mm, and the range of the sum of the thicknesses of at least a part of the clamp seat, at least a part of the heat dissipation layer, and at least a part of the first heat insulation layer in a direction perpendicular to the extending direction of the clamp arm is 0.25 mm to 6 mm.

[0013] Optionally, the nominal diameter of the closure head is 2 mm to 6 mm; the thickness of at least a part of the clamp seat in a direction perpendicular to the extending direction of the clamp arm ranges from 0.03 mm to 1 mm, and / or the thickness of at least a part of the heat dissipation layer in a direction perpendicular to the extending direction of the clamp arm ranges from 0.1 mm to 1 mm, and / or the thickness of at least a part of the first heat insulation layer in a direction perpendicular to the extending direction of the clamp arm ranges from 0.03 mm to 1 mm.

[0014] Optionally, the nominal diameter of the closure head is 7.5 mm to 9 mm; the thickness of at least a part of the clamp seat in a direction perpendicular to the extending direction of the clamp arm ranges from 0.03 mm to 2 mm, and / or the thickness of at least a part of the heat dissipation layer in a direction perpendicular to the extending direction of the clamp arm ranges from 0.1 mm to 2 mm, and / or the thickness of at least a part of the first heat insulation layer in a direction perpendicular to the extending direction of the clamp arm ranges from 0.03 mm to 2 mm.

[0015] The present invention also provides a closure, including a closure body and the above-mentioned closure head.

[0016] Optionally, the closer has a diversion channel for the flow of cooling fluid, and the diversion channel extends from the handle of the closer body along the elongated shaft to the closer jaws.

[0017] The beneficial effects of the closer jaws and the closer provided by the present invention are as follows: Compared with the prior art, the closer jaws of the present invention include at least two jaw arms that can move relative to each other to clamp tissue. At least one jaw arm includes a jaw seat, an electrode, a support structure for supporting the electrode, and a first heat insulation layer disposed between the electrode and the jaw seat. At least a part of the jaw seat, at least a part of the first heat insulation layer, and at least a part of the electrode are arranged adjacent to each other in sequence to form the clamping surface of the jaw arm. When the electrode is energized, heat can be generated to close the tissue. Through the setting of the first heat insulation layer, the heat can be concentrated at the tissue to be closed, preventing the heat from dissipating to other tissues so as to avoid thermal damage to other tissues. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 A three-dimensional structure diagram of the first closer jaws provided by the embodiment of the present invention when opened;

[0020] Figure 2 A three-dimensional structure diagram of the first closer jaws provided by the embodiment of the present invention when closed;

[0021] Figure 3 A three-dimensional structure diagram of the first closer jaws provided by the embodiment of the present invention when clamping tissue;

[0022] Figure 4 A three-dimensional cross-sectional view of the first closer jaws provided by the embodiment of the present invention when clamping tissue;

[0023] Figure 5 A side cross-sectional view of the first closer jaws provided by the embodiment of the present invention when clamping tissue;

[0024] Figure 6 A three-dimensional structure diagram of the first jaw seat provided by the embodiment of the present invention;

[0025] Figure 7 A three-dimensional structure diagram of the second jaw seat provided by the embodiment of the present invention;

[0026] Figure 8 A three-dimensional structure diagram of the third jaw seat provided by the embodiment of the present invention;

[0027] Figure 9 This is a three-dimensional structure diagram when the push knife of the first type of stapler jaw head provided by the embodiment of the present invention extends;

[0028] Figure 10 This is a three-dimensional cross-sectional view when the push knife of the first type of stapler jaw head provided by the embodiment of the present invention extends;

[0029] Figure 11 This is a three-dimensional structure diagram when the second type of stapler jaw head provided by the embodiment of the present invention opens;

[0030] Figure 12 This is a three-dimensional cross-sectional view when the second type of stapler jaw head provided by the embodiment of the present invention closes;

[0031] Figure 13 This is a three-dimensional structure diagram when the third type of stapler jaw head provided by the embodiment of the present invention opens;

[0032] Figure 14 This is a side cross-sectional view when the third type of stapler jaw head provided by the embodiment of the present invention closes;

[0033] Figure 15 This is a three-dimensional structure diagram when the fourth type of stapler jaw head provided by the embodiment of the present invention opens;

[0034] Figure 16 This is a three-dimensional structure diagram when the fourth type of stapler jaw head provided by the embodiment of the present invention closes.

[0035] Among them, the reference numerals in the figures are as follows:

[0036] 1 - clamping arm; 11 - electrode; 111 - electrode unit; 12 - support structure; 121 - support unit; 13 - first heat insulation layer; 14 - clamping seat; 141 - heat dissipation protrusion; 15 - heat dissipation layer; 2 - instrument rod; 3 - push knife; 4 - cooling fluid outlet; 5 - tissue. Detailed implementation manners

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0041] In surgery, with the aid of surgical energy and clamping pressure, tissue fusion and closure can be quickly achieved, reducing the use of indwelling items such as sutures and hemostatic clips and improving surgical efficiency. After tissue fusion and closure, the blood vessels in the tissue are sealed, and then the target tissue is safely separated by mechanical dissection (such as using a push knife) or electro-surgery (such as using an electrode to generate heat).

[0042] However, during the use of surgical instruments, such as the jaws of an electro-surgical stapler, a great deal of heat is generated to fuse and close the target tissue, which causes the tissue around the target tissue to also absorb more heat, resulting in a risk of tissue thermal injury.

[0043] To overcome the above problems, the present invention proposes a new stapler jaw and stapler. At least one clamping arm of the stapler jaw includes a clamping seat, an electrode, a support structure, and a first heat insulation layer. At least part of the clamping seat, at least part of the first heat insulation layer, and at least part of the electrode are arranged adjacent to each other in sequence to form a clamping surface of the clamping arm. The clamping surface contacts the tissue. Through the setting of the first heat insulation layer, the heat at the tissue can be concentrated at the tissue that needs to be fused and closed, preventing excessive heat from being dissipated to other tissues and causing thermal injury to the surrounding tissues.

[0044] The stapler jaw provided by the embodiments of the present invention will now be described.

[0045] Please refer to Figures 1 to 5 , the stapler jaw includes two clamping arms 1. The two clamping arms 1 can move relative to each other to achieve the mutual approach and mutual separation of the two clamping arms 1. When the two clamping arms 1 approach each other, they can clamp the tissue 5 and perform operations such as heating and coagulating the tissue 5.

[0046] Among them, at least one clamp arm 1 includes a clamp base 14, an electrode 11, a support structure 12, and a first heat insulation layer 13.

[0047] The clamp base 14 is the outer structure of the clamp arm 1, which is used to wrap the internal structure of the clamp base 14 and has a certain supporting effect on the internal structure. The electrode 11 is arranged inside the clamp base 14, and the electrode 11 is the main functional component in the clamp arm 1. After being energized, the electrode 11 can heat the tissue 5 to achieve operations such as coagulation and fusion of the tissue 5. The support structure 12 is arranged inside the clamp base 14, and the support structure 12 is used to support the electrode 11. Generally, the volume of the electrode 11 is relatively small, and there is a large difference in volume compared with structures such as the clamp base 14. The support structure 12 is needed to support it so that the electrode 11 can be located at the clamping surface for clamping the tissue 5 and can be in direct contact with the tissue 5. The first heat insulation layer 13 is arranged between the electrode 11 and the clamp base 14, and the first heat insulation layer 13 is used to concentrate the heat generated by the electrode 11 at the electrode 11 and reduce the transfer of heat to other tissues. The heat transfer coefficient of the first heat insulation layer 13 is small, and heat is not easily transmitted through the first heat insulation layer 13. Therefore, heat will not be transmitted to the tissue or the clamp base 14 through the first heat insulation layer 13.

[0048] At least a part of the clamp base 14, at least a part of the first heat insulation layer 13, and at least a part of the electrode 11 are arranged adjacent to each other in sequence and form the clamping surface of the clamp arm 1. The clamping surface is used to contact the tissue 5 and clamp the tissue 5. In this way, the first heat insulation layer 13 can concentrate the heat generated by the electrode 11 at the electrode 11 and reduce the possibility of heat dissipation. At least a part of the clamp base 14, at least a part of the first heat insulation layer 13, and the support structure 12 are arranged adjacent to each other in sequence. The arrangement direction can be the first direction, so that the support structure 12 can support the electrode 11 in the second direction, and the second direction is perpendicular to the first direction.

[0049] The support structure 12 and at least the part of the first heat insulation layer 13 in contact with the electrode 11 are insulated. In this embodiment, the components in contact with the electrode 11 are at least the support structure 12 and the first heat insulation layer 13. At least the part of the support structure 12 in contact with the electrode 11 and at least the part of the first heat insulation layer 13 in contact with the electrode 11 are insulated, so that except for one side of the clamping surface, the other exposed surfaces of the electrode 11 are wrapped by the insulating structure, which can prevent the electrode 11 from leaking electricity and ensure the safety and reliability of the use of the electrode 11.

[0050] The stapler jaws in the above embodiments include at least two jaw arms 1 that can move relative to each other to clamp tissue 5. At least one jaw arm 1 includes a jaw base 14, an electrode 11, a support structure 12 for supporting the electrode 11, and a first heat insulation layer 13 disposed between the electrode 11 and the jaw base 14. At least a part of the jaw base 14, at least a part of the first heat insulation layer 13, and at least a part of the electrode 11 are arranged adjacent to each other in sequence to form the clamping surface of the jaw arm 1. When the electrode 11 is energized, it can generate heat to close the tissue 5. By providing the first heat insulation layer 13, the heat can be concentrated at the tissue 5 to be closed, preventing the heat from dissipating to other tissues and avoiding thermal damage to other tissues.

[0051] In some embodiments of the present invention, please refer to Figures 1 to 3 , the two jaw arms 1 are rotatably connected. One of the jaw arms 1 is an integral structure with the slender shaft, and the other jaw arm 1 is rotatably connected to this jaw arm 1. By rotating one jaw arm 1 relative to the other jaw arm 1, the two jaw arms 1 approach each other to clamp the tissue 5.

[0052] In some embodiments of the present invention, please refer to Figure 1 , Figure 4 and Figure 5 , a receiving cavity is formed inside the jaw base 14 for receiving structures such as the support structure 12, the first heat insulation layer 13, and the electrode 11 to protect its internal structures.

[0053] Optionally, the cross-section of the jaw base 14 is semi-circular arc-shaped, and a semi-cylindrical space is formed inside it.

[0054] Optionally, the cross-section of the jaw base 14 is U-shaped, and a U-shaped space is formed inside it. The jaw base 14 includes two oppositely arranged side walls and a bottom wall connecting the two side walls, so that a U-shaped space is formed inside the jaw base 14. Among them, the bottom wall of the jaw base 14 can be straight or arc-shaped.

[0055] In some embodiments of the present invention, please refer to Figure 4 and Figure 5 , in a cross-section perpendicular to the length direction of the jaw arm 1, at least part of the structure of the cross-section is arranged in the order of the jaw base 14, the first heat insulation layer 13, the electrode 11, the first heat insulation layer 13, and the jaw base 14. At least part of the structure of the cross-section is arranged in the order of the jaw base 14, the first heat insulation layer 13, the support structure 12, the first heat insulation layer 13, and the jaw base 14.

[0056] In some embodiments, the number of the first heat insulation layers 13 is two, and the two first heat insulation layers 13 are respectively disposed at two oppositely arranged inner walls of the jaw base 14, and the electrode 11 is disposed between the two first heat insulation layers 13.

[0057] Optionally, the two first heat insulation layers 13 can be separately arranged. Alternatively, the two first heat insulation layers 13 are integrally connected at one end away from the clamping surface and are arranged on the inner wall of the clamp seat 14, which is equivalent to covering a first heat insulation layer 13 on the inner wall of the clamp seat 14.

[0058] In some embodiments of the present invention, please refer to Figure 5 , Figure 9 and Figure 10 , the closer head further includes a push knife 3. The push knife 3 can extend between the two clamp arms 1 to cut the tissue 5. When the two clamp arms 1 clamp the tissue 5, the push knife 3 can extend between the two clamp arms 1. The telescopic direction of the push knife 3 is perpendicular to the length direction of the clamp arms 1. In this way, the clamped tissue 5 can be cut. After the tissue 5 is cut, the push knife 3 retracts into the interior of the instrument rod 2, and the two clamp arms 1 clamp the tissue 5, and the tissue 5 can be heated and coagulated.

[0059] The plane where the largest surface of the push knife 3 is located is perpendicular to the clamping surface. Combining Figure 10 , the thickness direction of the push knife 3 is parallel to the thickness direction of the first heat insulation layer 13. Therefore, the upper and lower sides of the push knife 3 (based on the Figure 10 direction) respectively extend into the interiors of the two clamp arms 1. Correspondingly, please refer to Figure 5 , the electrode 11 includes two spaced electrode units 111, and the support structure 12 includes two spaced support units 121. The space formed between the two electrode units 111 and the space formed between the two support units 121 together form an avoidance space for avoiding the push knife 3, so that when the push knife 3 extends into the interior of the clamp arms 1, it will not interfere with the electrode 11 and the support unit 121.

[0060] In some embodiments of the present invention, please refer to Figures 10 to 12 , if the closer head does not include the push knife 3, then there is no need to set a space for avoiding the push knife 3 inside the clamp arms 1, and the electrode 11 and the support structure 12 can be integrally arranged. At least part of the cross-section structure of the clamp arms 1 is arranged in the order of the clamp seat 14, the first heat insulation layer 13, the electrode 11, the first heat insulation layer 13, and the clamp seat 14. At least part of the cross-section structure of the clamp arms 1 is arranged in the order of the clamp seat 14, the first heat insulation layer 13, the support structure 12, the first heat insulation layer 13, and the clamp seat 14.

[0061] In some embodiments of the present invention, the first heat insulation layer 13 can be composed of one or more of materials such as plastics, rock wool, porous materials, glass fiber, asbestos, etc.

[0062] In some embodiments of the present invention, due to its heat insulation performance, the first heat insulation layer 13 has a low thermal conductivity, usually between 0.01 - 0.1 W / (m·K).

[0063] In some embodiments of the present invention, the first heat insulation layer 13 not only has a heat insulation effect but also has an insulation effect. Thus, there is no need to provide an insulation layer on the surface of the first heat insulation layer 13 to insulate the electrode 11.

[0064] In some embodiments of the present invention, referring to Figure 5 , when the nominal diameter of the closer jaw is 2 mm to 6 mm, the range of the sum of the thicknesses of at least a part of the clamp seat 14 and at least a part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence is 0.1 mm to 2 mm. The sum of the thicknesses of at least a part of the clamp seat 14 and at least a part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence can be understood as, on the side of the cross-section of the clamp arm 1 close to the clamping surface and in the area corresponding to the electrode 11 to the clamp seat 14, the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13. For the convenience of description, it can be simply referred to as the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13. The greater the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burn of the external tissue. However, when the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is too large, it will cause an increase in the overall size of the clamp arm 1, and it is impossible to maintain the compactness of its structure, affecting its use in the human body. The smaller the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. However, when the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is too small, the distance between the electrode 11 and the tissue outside the clamp arm 1 is closer, and the heat generated by the electrode 11 is more likely to be transferred to the external tissue, reducing the heat barrier performance and possibly causing burns to the external tissue. Therefore, when the nominal diameter of the closer jaw is 2 mm to 6 mm, the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is set to 0.1 mm to 2 mm, such as 0.1 mm, 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, etc.

[0065] In some embodiments, the thickness of at least a portion of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.1 mm to 1 mm. The thickness of at least a portion of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the clamp seat 14 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the clamp seat 14. The greater the thickness of the clamp seat 14, the greater the structural strength of the clamp seat 14, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1, and the less likely the heat generated by the electrode 11 is transmitted to the external tissue, which can reduce the burn of the external tissue. However, when the thickness of the clamp seat 14 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the clamp seat 14, the smaller the structural size of the clamp arm 1. However, when the thickness of the clamp seat 14 is too small, the structural strength of the clamp seat 14 is too low, which is not conducive to structural design and layout. Moreover, the closer the distance between the electrode 11 and the tissue outside the clamp arm 1, the easier the heat generated by the electrode 11 is transmitted to the external tissue, and the heat barrier performance is reduced, which may cause burns to the external tissue. Therefore, when the nominal diameter of the stapler head is 2 mm to 6 mm, the thickness of the clamp seat 14 is set to 0.1 mm to 1 mm, such as 0.1 mm, 0.4 mm, 0.7 mm, 1 mm, etc. The thickness of the clamp seat 14 can be further set to 0.3 mm to 0.6 mm.

[0066] In some embodiments, the thickness of at least a portion of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.03 mm to 1 mm. The thickness of at least a portion of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the first heat insulation layer 13 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the first heat insulation layer 13. The greater the thickness of the first heat insulation layer 13, the better its heat insulation performance, and the more capable it is of concentrating the heat at the electrode 11 and avoiding heat dissipation to the external tissue. When the thickness of the first heat insulation layer 13 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. When the thickness of the first heat insulation layer 13 is too small, its heat insulation performance is very poor and it cannot block the heat from being transmitted to the external tissue. Therefore, when the nominal diameter of the stapler head is 2 mm to 6 mm, the thickness of the first heat insulation layer 13 is set to 0.03 mm to 1 mm, such as 0.3 mm, 0.5 mm, 0.7 mm, 1 mm, etc. The thickness of the first heat insulation layer 13 can be further set to 0.15 mm to 0.3 mm.

[0067] In some embodiments of the present invention, please refer to Figure 5When the nominal diameter of the stapler head is from 7.5 mm to 9 mm, the sum of the thicknesses of at least part of the clamp seat 14 and at least part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence ranges from 0.1 mm to 4 mm. The sum of the thicknesses of at least part of the clamp seat 14 and at least part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence can be understood as the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 on the side close to the clamping surface of the cross-section of the clamp arm 1 and within the area corresponding to the electrode 11 to the clamp seat 14. For the convenience of description, it can be simply referred to as the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13. The larger the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1 is, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burn of the external tissue. However, when the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is too large, it will cause the overall size of the clamp arm 1 to increase, making it impossible to maintain the compactness of its structure and affecting its use in the human body. The smaller the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is, the smaller the structural size of the clamp arm 1 is. However, when the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is too small, the distance between the electrode 11 and the tissue outside the clamp arm 1 is closer, and the heat generated by the electrode 11 is more likely to be transferred to the external tissue, reducing the heat blocking performance and possibly causing the burn of the external tissue. Therefore, when the nominal diameter of the stapler head is from 7.5 mm to 9 mm, the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is set to be from 0.1 mm to 4 mm, such as 0.1 mm, 0.5 mm, 1 mm, 2 mm, 4 mm, etc.

[0068] In some embodiments, the thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.1 mm to 2 mm. The thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the clamp seat 14 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the sake of convenient description, it is simply referred to as the thickness of the clamp seat 14. The greater the thickness of the clamp seat 14, the greater the structural strength of the clamp seat 14, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burn of the external tissue. However, when the thickness of the clamp seat 14 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the clamp seat 14, the smaller the structural size of the clamp arm 1. However, when the thickness of the clamp seat 14 is too small, the structural strength of the clamp seat 14 is too low, which is not conducive to structural design and layout. Moreover, the closer the distance between the electrode 11 and the tissue outside the clamp arm 1, the easier the heat generated by the electrode 11 is to be transferred to the external tissue, and the heat barrier performance is reduced, which may cause burns to the external tissue. Therefore, when the nominal diameter of the closer head is 7.5 mm to 9 mm, the thickness of the clamp seat 14 is set to 0.1 mm to 2 mm, such as 0.1 mm, 0.5 mm, 1 mm, 2 mm, etc. The thickness of the clamp seat 14 can be further set to 0.7 mm to 1.2 mm.

[0069] In some embodiments, the thickness of at least a part of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.03 mm to 2 mm. The thickness of at least a part of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the first heat insulation layer 13 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the sake of convenient description, it is simply referred to as the thickness of the first heat insulation layer 13. The greater the thickness of the first heat insulation layer 13, the better its heat insulation performance, and the more capable it is of concentrating heat at the electrode 11 and preventing heat from dissipating to the external tissue. When the thickness of the first heat insulation layer 13 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. When the thickness of the first heat insulation layer 13 is too small, its heat insulation performance is very poor and it cannot block the transfer of heat to the external tissue. Therefore, when the nominal diameter of the closer head is 7.5 mm to 9 mm, the thickness of the first heat insulation layer 13 is set to 0.03 mm to 2 mm, such as 0.03 mm, 0.3 mm, 0.6 mm, 1 mm, 2 mm, etc. The thickness of the first heat insulation layer 13 can be further set to 0.15 mm to 0.5 mm.

[0070] In some embodiments of the present invention, the clamp seat 14 is made of metal or a material with a high thermal conductivity coefficient, and the clamp seat 14 can be used for heat dissipation. Both metal and materials with a high thermal conductivity coefficient have relatively high thermal conductivity coefficients and excellent heat transfer performance. At least a part of the clamp seat 14 is in contact with the tissue 5 at the clamping surface. Here, the tissue 5 is relatively close to the tissue 5 heated by the electrode 11, which may cause thermal damage to the tissue 5 at the clamp seat 14. Therefore, by setting the clamp seat 14 as metal or a material with a high thermal conductivity coefficient, the heat of the tissue 5 on the side of the clamp seat 14 close to the clamping surface can be quickly dissipated outward through the clamp seat 14, reducing thermal damage.

[0071] Among them, the thermal conductivity coefficient of the material with a high thermal conductivity coefficient is usually higher than 20 W / (m·K).

[0072] In some embodiments of the present invention, please refer to Figures 6 to 8 , a heat dissipation protrusion 141 is provided on the surface of the clamp seat 14. The setting of the heat dissipation protrusion 141 can increase the surface area of the clamp seat 14 and enhance the heat dissipation ability of the clamp seat 14. The shape of the heat dissipation protrusion 141 can be plate-shaped, strip-shaped, block-shaped, grid-shaped, etc. The specific structure of the heat dissipation protrusion 141 is not limited here, as long as the structure can increase the surface area of the clamp seat 14 can be called the heat dissipation protrusion 141.

[0073] In some embodiments, please refer to Figure 6 , the heat dissipation protrusion 141 is plate-shaped. The thickness direction of the heat dissipation protrusion 141 is parallel to the cross-section of the clamp arm 1, and the length direction of the heat dissipation protrusion 141 is parallel to the length direction of the clamp arm 1. The plate-shaped heat dissipation protrusions 141 are distributed at intervals along the circumferential direction of the clamp seat 14 to increase the heat dissipation area.

[0074] In some embodiments, please refer to Figure 7 , the heat dissipation protrusion 141 is block-shaped, and the block-shaped heat dissipation protrusions 141 are arranged in an array on the surface of the clamp seat 14.

[0075] In some embodiments, please refer to Figure 8 , the heat dissipation protrusion 141 is strip-shaped. The thickness direction of the heat dissipation protrusion 141 is parallel to the length direction of the clamp arm 1, and the heat dissipation protrusion 141 extends along the circumferential surface of the clamp seat 14. A plurality of heat dissipation protrusions 141 are arranged at intervals in sequence along the length direction of the clamp arm 1 to increase the heat dissipation area.

[0076] In some embodiments of the present invention, an endothermic layer is provided on the outer surface of the clamp seat 14. The thermal conductivity coefficient of the endothermic layer is greater than that of the clamp seat 14. At least a part of the endothermic layer forms a clamping surface, so that the heat of the tissue 5 clamped by the clamp seat 14 and the endothermic layer is quickly absorbed and dispersed and conducted to the clamp seat 14 and the endothermic layer, and the heat can be dissipated more quickly.

[0077] In some embodiments of the present invention, a temperature sensor is provided near the clamping surface of the clamp seat 14, which can detect the temperature of the tissue 5 at the clamping surface, so as to remind the operator to avoid contacting the target tissue 5 at high temperature and reduce the risk of thermal damage to the tissue 5.

[0078] In some embodiments of the present invention, please refer to Figure 13 and Figure 14 , the clamp seat 14 is a second heat insulation layer, the clamp arm 1 further includes a heat dissipation layer 15, at least part of the clamp seat 14, at least part of the heat dissipation layer 15, at least part of the first heat insulation layer 13 and at least part of the electrode 11 are arranged adjacent to each other in sequence to form the clamping surface of the clamp arm 1.

[0079] In this embodiment, the clamp seat 14 is a second heat insulation layer, and the clamp seat 14 has the function of heat insulation. The clamp seat 14 can be composed of one or more of materials such as plastics, rock wool, porous materials, glass fiber, asbestos, etc. Due to its heat insulation performance, the clamp seat 14 has a low thermal conductivity, usually between 0.01 - 0.1 W / (m·K).

[0080] In this embodiment, the heat dissipation layer 15 is made of metal or a material with a high thermal conductivity. The thermal conductivities of metal or a material with a high thermal conductivity are both relatively high, and they have better heat transfer performance. Among them, the thermal conductivity of the material with a high thermal conductivity is usually higher than 20 W / (m·K).

[0081] The function of setting the clamp seat 14 as the second heat insulation layer and arranging the heat dissipation layer 15 between the clamp seat 14 and the first heat insulation layer 13 is as follows: the first heat insulation layer 13 gathers the heat generated by the electrode 11 at the electrode 11, so that the heat generated by the electrode 11 will not be dissipated to the tissue outside the clamp arm 1. At the same time, at least part of the heat dissipation layer 15 is in contact with the tissue adjacent to the coagulated tissue 5, and can quickly transfer the heat of the tissue here to the clamp seat 14 to avoid thermal damage to the tissue here. Moreover, the clamp seat 14 is arranged outside the heat dissipation layer 15, so that when the temperature of the heat dissipation layer 15 rises, it will not cause thermal damage to the tissue at the outer surface of the clamp seat 14, protecting the tissue at the outer surface of the clamp seat 14.

[0082] In some embodiments of the present invention, please refer to Figure 14When the nominal diameter of the stapler head is from 2 mm to 6 mm, the sum of the thicknesses of at least part of the clamp seat 14, at least part of the heat dissipation layer 15, and at least part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence ranges from 0.25 mm to 3 mm. The sum of the thicknesses of at least part of the clamp seat 14, at least part of the heat dissipation layer 15, and at least part of the first heat insulation layer 13 in the direction of being arranged adjacent to each other in sequence can be understood as the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13 in the area corresponding to the electrode 11 to the clamp seat 14 on the side close to the clamping surface of the cross-section of the clamp arm 1. For the convenience of description, it can be simply referred to as the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13. The larger the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burning of the external tissue. However, when the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13 is too large, it will cause the overall size of the clamp arm 1 to increase, and it is impossible to maintain the compactness of its structure, affecting its use in the human body. The smaller the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. However, when the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13 is too small, the distance between the electrode 11 and the tissue outside the clamp arm 1 is closer, and the heat generated by the electrode 11 is more likely to be transferred to the external tissue, reducing the heat blocking performance and possibly causing the burning of the external tissue. Therefore, when the nominal diameter of the stapler head is from 2 mm to 6 mm, the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is set to be from 0.25 mm to 3 mm, such as 0.25 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, etc.

[0083] In some embodiments, the thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.03 mm to 1 mm. The thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the clamp seat 14 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the clamp seat 14. The greater the thickness of the clamp seat 14, the greater the structural strength of the clamp seat 14, the better the heat insulation performance, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burn of the external tissue. However, when the thickness of the clamp seat 14 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the clamp seat 14, the smaller the structural size of the clamp arm 1. However, when the thickness of the clamp seat 14 is too small, the structural strength of the clamp seat 14 is too low, which is not conducive to structural design and layout. Moreover, the heat insulation performance of the clamp seat 14 is reduced, and the heat of the heat dissipation layer 15 may dissipate to the tissue at the outer surface of the clamp seat 14, reducing the heat barrier performance and possibly causing burns to the external tissue. Therefore, when the nominal diameter of the closer jaw is 2 mm to 6 mm, the thickness of the clamp seat 14 is set to 0.03 mm to 1 mm, such as 0.03 mm, 0.4 mm, 0.7 mm, 1 mm, etc. The thickness of the clamp seat 14 can be further set to 0.15 mm to 0.3 mm.

[0084] In some embodiments, the thickness of at least a part of the heat dissipation layer 15 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.1 mm to 1 mm. The thickness of at least a part of the heat dissipation layer 15 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the heat dissipation layer 15 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the heat dissipation layer 15. The greater the thickness of the heat dissipation layer 15, the better its heat dissipation performance, and the heat of the tissue near the coagulated tissue 5 can be quickly transferred to the heat dissipation layer 15. When the thickness of the heat dissipation layer 15 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the heat dissipation layer 15, the smaller the structural size of the clamp arm 1. When the thickness of the heat dissipation layer 15 is too small, its heat dissipation performance is very poor, and it cannot absorb the heat of the transferred tissue. Therefore, when the nominal diameter of the closer jaw is 2 mm to 6 mm, the thickness of the heat dissipation layer 15 is set to 0.1 mm to 1 mm, such as 0.1 mm, 0.5 mm, 0.7 mm, 1 mm, etc. The thickness of the heat dissipation layer 15 can be further set to 0.3 mm to 0.6 mm.

[0085] In some embodiments, at least a portion of the first heat insulation layer 13 has a thickness range of 0.03 mm to 1 mm in a direction perpendicular to the extending direction of the clamp arm 1. The thickness of at least a portion of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the first heat insulation layer 13 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the first heat insulation layer 13. The greater the thickness of the first heat insulation layer 13, the better its heat insulation performance, and the more capable it is of concentrating heat at the electrode 11 and preventing heat from dissipating to the external tissue. When the thickness of the first heat insulation layer 13 is too large, the overall size of the clamp arm 1 will increase, making it impossible to maintain its structural compactness and affecting its use in the human body. The smaller the thickness of the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. When the thickness of the first heat insulation layer 13 is too small, its heat insulation performance is very poor and it cannot block the transfer of heat to the external tissue. Therefore, when the nominal diameter of the closer head is 2 mm to 6 mm, the thickness of the first heat insulation layer 13 is set to 0.03 mm to 1 mm, such as 0.3 mm, 0.5 mm, 0.7 mm, 1 mm, etc. The thickness of the first heat insulation layer 13 can be further set to 0.15 mm to 0.3 mm.

[0086] In some embodiments of the present invention, please refer to Figure 14When the nominal diameter of the stapler head is from 7.5 mm to 9 mm, the sum of the thicknesses of at least part of the clamp seat 14, at least part of the heat dissipation layer 15, and at least part of the first heat insulation layer 13 in the direction of adjacent arrangement in turn ranges from 0.25 mm to 6 mm. The sum of the thicknesses of at least part of the clamp seat 14, at least part of the heat dissipation layer 15, and at least part of the first heat insulation layer 13 in the direction of adjacent arrangement in turn can be understood as, on the side close to the clamping surface of the cross-section of the clamp arm 1 and within the area corresponding to the electrode 11 to the clamp seat 14, the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13. For the convenience of description, it can be simply referred to as the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13. The greater the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13, the farther the distance between the electrode 11 and the tissue outside the clamp arm 1, and the less likely the heat generated by the electrode 11 is transmitted to the external tissue, which can reduce the burn of the external tissue. However, when the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13 is too large, it will cause the overall size of the clamp arm 1 to increase, unable to maintain its structural compactness, and affect its use in the human body. The smaller the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. However, when the sum of the thicknesses of the clamp seat 14, the heat dissipation layer 15, and the first heat insulation layer 13 is too small, the distance between the electrode 11 and the tissue outside the clamp arm 1 is closer, the heat generated by the electrode 11 is more easily transmitted to the external tissue, and the heat barrier performance is reduced, which may cause the burn of the external tissue. Therefore, when the nominal diameter of the stapler head is from 7.5 mm to 9 mm, the sum of the thicknesses of the clamp seat 14 and the first heat insulation layer 13 is set to be from 0.25 mm to 6 mm, such as 0.25 mm, 0.5 mm, 2 mm, 5 mm, 6 mm, etc.

[0087] In some embodiments, the thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.03 mm to 2 mm. The thickness of at least a part of the clamp seat 14 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the clamp seat 14 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the clamp seat 14. The greater the thickness of the clamp seat 14, the greater the structural strength of the clamp seat 14, the better the heat insulation performance, and the less likely the heat generated by the electrode 11 is to be transferred to the external tissue, which can reduce the burn of the external tissue. However, when the thickness of the clamp seat 14 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the clamp seat 14, the smaller the structural size of the clamp arm 1. However, when the thickness of the clamp seat 14 is too small, the structural strength of the clamp seat 14 is too low, which is not conducive to structural design and layout. Moreover, the heat insulation performance of the clamp seat 14 is reduced, and the heat of the heat dissipation layer 15 may dissipate to the tissue at the outer surface of the clamp seat 14, reducing the heat barrier performance and possibly causing burns to the external tissue. Therefore, when the nominal diameter of the closer jaw is 7.5 mm to 9 mm, the thickness of the clamp seat 14 is set to 0.03 mm to 2 mm, such as 0.03 mm, 0.4 mm, 1 mm, 2 mm, etc. The thickness of the clamp seat 14 can be further set to 0.15 mm to 0.5 mm.

[0088] In some embodiments, the thickness of at least a part of the heat dissipation layer 15 in a direction perpendicular to the extending direction of the clamp arm 1 ranges from 0.1 mm to 2 mm. The thickness of at least a part of the heat dissipation layer 15 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the heat dissipation layer 15 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the heat dissipation layer 15. The greater the thickness of the heat dissipation layer 15, the better its heat dissipation performance, and the heat of the tissue near the coagulated tissue 5 can be quickly transferred to the heat dissipation layer 15. When the thickness of the heat dissipation layer 15 is too large, the overall size of the clamp arm 1 will increase, and its structural compactness cannot be maintained, affecting its use in the human body. The smaller the thickness of the heat dissipation layer 15, the smaller the structural size of the clamp arm 1. When the thickness of the heat dissipation layer 15 is too small, its heat dissipation performance is very poor, and it cannot absorb the heat of the transferred tissue. Therefore, when the nominal diameter of the closer jaw is 7.5 mm to 9 mm, the thickness of the heat dissipation layer 15 is set to 0.1 mm to 2 mm, such as 0.1 mm, 0.5 mm, 1 mm, 2 mm, etc. The thickness of the heat dissipation layer 15 can be further set to 0.7 mm to 1.2 mm.

[0089] In some embodiments, at least a portion of the first heat insulation layer 13 has a thickness range of 0.03 mm to 2 mm in a direction perpendicular to the extending direction of the clamp arm 1. The thickness of at least a portion of the first heat insulation layer 13 in a direction perpendicular to the extending direction of the clamp arm 1 can be understood as the thickness of the first heat insulation layer 13 on the side close to the clamping surface in the cross-section of the clamp arm 1. For the convenience of description, it is simply referred to as the thickness of the first heat insulation layer 13. The greater the thickness of the first heat insulation layer 13, the better its heat insulation performance, and the more capable it is of concentrating heat at the electrode 11 and preventing heat from dissipating to the external tissue. When the thickness of the first heat insulation layer 13 is too large, the overall size of the clamp arm 1 will increase, and it will be unable to maintain the compactness of its structure, affecting its use in the human body. The smaller the thickness of the first heat insulation layer 13, the smaller the structural size of the clamp arm 1. When the thickness of the first heat insulation layer 13 is too small, its heat insulation performance is very poor, and it is unable to block the transfer of heat to the external tissue. Therefore, when the nominal diameter of the closure head is 7.5 mm to 9 mm, the thickness of the first heat insulation layer 13 is set to 0.03 mm to 2 mm, such as 0.3 mm, 0.5 mm, 1 mm, 2 mm, etc. The thickness of the first heat insulation layer 13 can be further set to 0.15 mm to 0.5 mm.

[0090] In some embodiments of the present invention, please refer to Figure 15 and Figure 16 , one of the two clamp arms 1 is the clamp arm 1 in any of the above embodiments, and the other of the two clamp arms 1 is an ultrasonic rod. The ultrasonic vibration of the ultrasonic rod can coagulate and sever the clamped tissue 5. In this embodiment, the coagulation and cutting energy of the tissue 5 is a combination of ultrasonic energy and the electro-surgical energy of the electrode 11.

[0091] In this embodiment, the closure head does not need to be provided with a push knife 3, and the tissue 5 can be severed through the cooperation of the ultrasonic rod and the electrode 11.

[0092] The present invention also provides a closure device, including the closure head in any of the above embodiments. The closure device further includes a closure device body, and the closure device body may include a handle, a slender shaft connecting the handle and the closure head, etc.

[0093] The closure device provided by the present invention adopts the above-mentioned closure head. The closure head includes at least two clamp arms 1 that can move relative to each other to clamp the tissue 5. At least one clamp arm 1 includes a clamp seat 14, an electrode 11, a support structure 12 for supporting the electrode 11, and a first heat insulation layer 13 provided between the electrode 11 and the clamp seat 14. At least a portion of the clamp seat 14, at least a portion of the first heat insulation layer 13, and at least a portion of the electrode 11 are arranged adjacent to each other in sequence to form the clamping surface of the clamp arm 1. When the electrode 11 is energized, it can generate heat to close the tissue 5. Through the setting of the first heat insulation layer 13, the heat can be concentrated at the tissue 5 to be closed, preventing the heat from dissipating to other tissues so as to avoid causing thermal damage to other tissues.

[0094] In some embodiments of the present invention, refer to Figure 3 , the stapler has a diversion channel for the flow of cooling fluid, and the diversion channel extends from the handle of the stapler body along the elongated shaft to the stapler head. The diversion channel extends from the handle along the elongated shaft to the stapler head, and cooling fluid can flow inside the diversion channel. One end of the diversion channel close to the stapler head has a cooling fluid outlet 4, that is, the cooling fluid in the diversion channel is ejected through the cooling fluid outlet 4 to the stapler head to cool the stapler head and the tissue nearby, avoiding thermal damage. The cooling fluid can be a low-temperature gas, such as carbon dioxide, air, etc., and the cooling fluid can also be a low-temperature liquid, such as normal saline, distilled water, etc.

[0095] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stapler head, characterized in that: It includes two clamp arms (1) capable of relative movement to clamp tissue (5). At least one of the clamp arms (1) includes a clamp base (14), an electrode (11), a support structure (12) disposed within the clamp base (14) and used to support the electrode (11), and a first heat insulation layer (13) disposed between the electrode (11) and the clamp base (14). At least part of the clamp base (14), at least part of the first heat insulation layer (13), and at least part of the electrode (11) are arranged adjacent to each other in sequence to form the clamping surface of the clamp arm (1). At least the part of the support structure (12) in contact with the electrode (11) is insulated, and at least the part of the first heat insulation layer (13) in contact with the electrode (11) is insulated.

2. The stapler head according to claim 1, wherein: The nominal diameter range of the closer jaw is from 2 mm to 6 mm, and the sum of the thicknesses of at least part of the clamp base (14) and at least part of the first heat insulation layer (13) in the direction of adjacent arrangement in sequence ranges from 0.1 mm to 2 mm; The nominal diameter of the closer jaw is from 7.5 mm to 9 mm, and the sum of the thicknesses of at least part of the clamp base (14) and at least part of the first heat insulation layer (13) in the direction of adjacent arrangement in sequence ranges from 0.1 mm to 4 mm.

3. The closer jaw according to claim 2, characterized in that: The nominal diameter of the closer jaw is from 2 mm to 6 mm; the thickness range of at least part of the clamp base (14) in the direction perpendicular to the extension direction of the clamp arm (1) is from 0.1 mm to 1 mm, and / or, the thickness range of at least part of the first heat insulation layer (13) in the direction perpendicular to the extension direction of the clamp arm (1) is from 0.03 mm to 1 mm.

4. The stapler head according to claim 2, wherein: The nominal diameter of the closer jaw is from 7.5 mm to 9 mm, the thickness range of at least part of the clamp base (14) in the direction perpendicular to the extension direction of the clamp arm (1) is from 0.1 mm to 2 mm, and the thickness range of at least part of the first heat insulation layer (13) in the direction perpendicular to the extension direction of the clamp arm (1) is from 0.03 mm to 2 mm.

5. The stapler head according to any one of claims 1-4, characterized in that: The clamp base (14) is made of metal or a material with a high thermal conductivity coefficient, and the clamp base (14) can be used for heat dissipation.

6. The closer jaw according to claim 5, characterized in that: The surface of the clamp base (14) is provided with heat dissipation protrusions (141).

7. The stapler head according to claim 2, characterized in that: The clamp base (14) is a second heat insulation layer, the clamp arm (1) further includes a heat dissipation layer (15), and at least part of the clamp base (14), at least part of the heat dissipation layer (15), at least part of the first heat insulation layer (13), and at least part of the electrode (11) are arranged adjacent to each other in sequence to form the clamping surface of the clamp arm (1).

8. The closer jaw according to claim 7, wherein: The nominal diameter of the stapler head is from 2 mm to 6 mm, and the sum of the thicknesses of at least part of the clamp seat (14), at least part of the heat dissipation layer (15), and at least part of the first heat insulation layer (13) in a direction perpendicular to the extension direction of the clamp arm ranges from 0.25 mm to 3 mm; the nominal diameter of the stapler head is from 7.5 mm to 9 mm, and the sum of the thicknesses of at least part of the clamp seat (14), at least part of the heat dissipation layer (15), and at least part of the first heat insulation layer (13) in a direction perpendicular to the extension direction of the clamp arm ranges from 0.25 mm to 6 mm.

9. The stapler head according to claim 8, wherein: The nominal diameter of the stapler head is from 2 mm to 6 mm; the thickness of at least part of the clamp seat (14) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.03 mm to 1 mm, and / or the thickness of at least part of the heat dissipation layer (15) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.1 mm to 1 mm, and / or the thickness of at least part of the first heat insulation layer (13) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.03 mm to 1 mm.

10. The stapler head according to claim 8, characterized in that: The nominal diameter of the stapler head is from 7.5 mm to 9 mm; the thickness of at least part of the clamp seat (14) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.03 mm to 2 mm, and / or the thickness of at least part of the heat dissipation layer (15) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.1 mm to 2 mm, and / or the thickness of at least part of the first heat insulation layer (13) in a direction perpendicular to the extension direction of the clamp arm (1) ranges from 0.03 mm to 2 mm.

11. A closer, characterized in that: It includes a stapler body and the stapler head according to any one of claims 1-10.

12. The closer according to claim 11, characterized in that: The stapler has a diversion channel for the cooling fluid to flow through, and the diversion channel extends from the handle of the stapler body along the elongated shaft to the stapler head.

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