Anorectal stapler for hemorrhoidectomy

Abstract

The application relates to an anorectal anastomat for hemorrhoidectomy, which has a head portion protruding forward in a first direction, the head portion being provided with a clamping assembly for clamping hemorrhoid tissue in a second direction, anastomat nails for nailing the hemorrhoid tissue in a third direction, and a cutting knife for cutting the hemorrhoid tissue in a fourth direction; the second direction is substantially perpendicular to the first direction. The application can relieve the pain of a patient to a certain extent during the hemorrhoidectomy and provide convenience for the hemorrhoidectomy.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to an anorectal stapler for hemorrhoidectomy. Background Technology

[0002] Hemorrhoids are the most common anal disease. Figure 1 As shown, hemorrhoid tissue 100 is usually roughly elongated in shape at the anus 200 of the patient's rectum, and its length extends roughly along the length direction of the anus. The length of hemorrhoid tissue 100 is usually several times its width.

[0003] An anorectal stapler is a medical device used to remove hemorrhoids. It has a head that needs to be inserted into the patient's anorectal cavity during use to perform related treatments at the surgical site. The head of the stapler has a length extending in a first direction, and during use, the head is inserted (partially or completely) into the patient's anorectal cavity, generally along the aforementioned first direction.

[0004] To achieve the aforementioned "related processing", the head of the stapler is generally equipped with: a clamping component for clamping and fixing hemorrhoid tissue, a staple for stapled together the clamped hemorrhoid tissue, and a cutting blade for cutting the stapled hemorrhoid tissue.

[0005] The process of removing hemorrhoidal tissue using a stapler is roughly as follows: First, the head of the stapler is inserted roughly along its length into the affected area of ​​the rectum. Then, the clamping component moving in a second direction clamps and fixes the hemorrhoidal tissue to be removed. Next, the staples on the stapler head moving in a third direction staple the clamped hemorrhoidal tissue together. Finally, the cutting blade on the stapler head moving in a fourth direction removes the stapled hemorrhoidal tissue. After the resection surgery, the staples remain in the body to close the wound.

[0006] Traditional anorectal staplers, such as the one described in publication CN 111789652A, have the same clamping direction of the head clamping component, the stapling direction of the staples, and the cutting direction of the cutter as the extension direction of the stapler head, i.e., the first direction mentioned above. That is, the traditional stapler head clamping component clamps and fixes the hemorrhoidal tissue along its length, staples it along its length, and cuts it along its length. However, as mentioned earlier, the length of hemorrhoidal tissue is usually much greater than its width, while surgery typically requires the hemorrhoidal tissue to be as small as possible in the clamping direction to facilitate stapling. This results in significant deformation of the clamped hemorrhoidal tissue compared to its initial state after the stapler head clamps and fixes it along its length. This not only increases patient discomfort but also increases surgical risks due to the excessive deformation of the hemorrhoidal tissue. Summary of the Invention

[0007] The technical problem solved by this application is to provide an anorectal stapler for hemorrhoidectomy, so as to reduce the pain of patients during hemorrhoidectomy to a certain extent, and at the same time facilitate hemorrhoidectomy.

[0008] The technical solution of this application is:

[0009] A transrectal stapler for hemorrhoidectomy is proposed, having a head extending forward in a first direction, the head being provided with:

[0010] The clamping component clamps the hemorrhoid tissue in the second direction.

[0011] The staples move upwards in a third-party manner to staple the hemorrhoidal tissue, and

[0012] The incision knife moves in the fourth direction to remove hemorrhoid tissue;

[0013] The second direction is approximately perpendicular to the first direction.

[0014] Based on the above technical solutions, this application may further include one or more of the following preferred solutions:

[0015] The third direction is approximately parallel to the second direction.

[0016] The fourth direction is approximately parallel to the second direction.

[0017] The clamping assembly includes a movable clamp and a fixed clamp arranged in the second direction. The anorectal stapler also includes a clamping actuator connected to the movable clamp via a first transmission assembly to drive the movable clamp to move toward the fixed clamp.

[0018] The anorectal stapler further includes a first housing with a handle, and the clamping actuator is a trigger with a first end extending into and pivotally connected to the first housing and a second end extending out of the first housing. The first transmission assembly includes:

[0019] A first link extends in the first direction, and one end of the first link is fixed to the movable clamp.

[0020] The second link has a first end pivotally connected to the first link and a second end pivotally connected to the first housing.

[0021] A third link, the first end of which is pivotally connected to the first link; and a second link, the second end of which is pivotally connected to the first housing; and

[0022] A drive belt connects the first end of the trigger to the second end of the third link.

[0023] The movable clamp is provided with:

[0024] The staple outlet is used to receive and guide the anastomosis staples as they move upwards in the third party, and

[0025] The blade outlet is used to receive and guide the movement of the cutter in the fourth direction.

[0026] The anorectal stapler also includes:

[0027] A nail pusher plate, which is arranged on the side of the movable clamp facing away from the fixed clamp in the second direction; and

[0028] A nail actuator, operably connected to the nail pusher plate via a second transmission assembly, is used to drive the nail pusher plate to move, thereby ejecting the staples and the cutter from the staple outlet and the cutter outlet, respectively.

[0029] The nail knife actuator is a push button that can move in the first direction, and the second transmission assembly includes:

[0030] A push block is arranged on the side of the nail knife push plate that is away from the movable clamp in the second direction, and the push block has an oblique groove arranged intersecting the first direction.

[0031] A push rod extends in the first direction, with its front end connected to the push button and its rear end pivotally connected to a roller that moves through the inclined groove.

[0032] The push rod has an elongated push rod guide hole extending in the first direction, and the second housing is connected to a sliding pin that movably passes through the push rod guide hole.

[0033] The nail pusher plate includes:

[0034] Push blade section, and

[0035] A pusher pin extending from the pusher portion toward the movable clamp;

[0036] The pusher pin can be operably extended into the ejector pin hole.

[0037] This application has at least the following beneficial effects:

[0038] In this application, the anorectal stapler clamps and fixes the hemorrhoidal tissue to be removed in a direction approximately perpendicular to the length of the anorectal region, thereby clamping and fixing the hemorrhoidal tissue along its narrow width. This not only reduces the patient's pain during hemorrhoid removal surgery but also facilitates subsequent stapled and excised hemorrhoids. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0040] Figure 1 This is a diagram of hemorrhoid tissue.

[0041] Figure 2 This is a three-dimensional structural diagram of the anorectal anastomosis device in Embodiment 1 of this application, wherein the clamping component is in a clamping state, and the anastomosis staples and the cutting blade are in the states of being ready to be ejected and ready to be ejected, respectively.

[0042] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the anorectal stapler.

[0043] Figure 4 yes Figure 3 Enlarged view of part X1.

[0044] Figure 5 yes Figure 3 A schematic diagram showing the push button of the anorectal stapler being moved forward, pushing out the staples and cutter.

[0045] Figure 6 yes Figure 5 Enlarged view of part X2.

[0046] Figure 7 yes Figure 2 A schematic diagram of the first part of the anorectal stapler after the push button has been retracted to its limit position.

[0047] Figure 8 yes Figure 2 A schematic diagram of the second part of the anorectal stapler.

[0048] Figure 9 yes Figure 2 A schematic diagram of the first part of the anorectal stapler in the unclamped state of the clamping assembly.

[0049] Figure 10 yes Figure 9 Enlarged view of part X3.

[0050] Figure 11 yes Figure 2 A schematic diagram of the first part of the anorectal stapler in the clamping assembly in the clamped state.

[0051] Figure 12 yes Figure 11 Enlarged view of part X4.

[0052] Figure 13 yes Figure 11 Top view after the nail knife pusher plate has been removed.

[0053] Figure 14 yes Figure 13 Enlarged image of part X5.

[0054] Figure 15 yes Figure 2 Exploded view of the anorectal stapler.

[0055] Figure 16 yes Figure 15 A magnified view of a portion of the image.

[0056] Figure 17 This is a schematic diagram of the cutter structure in Embodiment 1 of this application.

[0057] Figure 18 This is a demonstration diagram showing the cutting of hemorrhoid tissue using a straight cutting blade.

[0058] Figure 19 yes Figure 18 A schematic diagram of the structure of hemorrhoid tissue after the incision is completed.

[0059] Figure 20 This is a demonstration diagram of cutting thin hemorrhoid tissue using the cutting tool described in Embodiment 1 of this application.

[0060] Figure 21 yes Figure 20 A schematic diagram of the structure of hemorrhoid tissue after the cutting action is completed.

[0061] Figure 22 This is a demonstration diagram of cutting thick hemorrhoid tissue using the cutting tool described in Embodiment 1 of this application.

[0062] Figure 23 yes Figure 22 A schematic diagram of the structure of hemorrhoid tissue after the cutting action is completed.

[0063] Figure 24 This is a schematic diagram of the structure of the anastomosis device in Embodiment 2 of this application before the first treatment of the lesion tissue.

[0064] Figure 25 This is a schematic diagram of the structure of the stapler in Embodiment 2 of this application when it performs the first treatment on the lesion tissue but does not perform the second treatment.

[0065] Figure 26 This is a schematic diagram of the structure of the stapler performing a second treatment on the lesion tissue in Embodiment 2 of this application.

[0066] Explanation of reference numerals in the attached figures:

[0067] 1000 - Part 1, 2000 - Part 2;

[0068] 1001 - First front end portion; 2001 - Second front end portion;

[0069] 100 - Hemorrhoid tissue, 200 - Anus and rectum, 300 - Human body;

[0070] 101 - The connection between the cut segment and the uncut segment of hemorrhoidal tissue; 102 - The suture between the cut segment and the uncut segment of hemorrhoidal tissue;

[0071] d1 - First direction, d2 - Second direction, d3 - Third direction, d4 - Fourth direction;

[0072] 1-Stabilizing staple, 2-Cutter, 3-Fixed clamp, 4-Moving clamp, 5-Clamping actuator, 6-First housing, 7-Stabilizer push plate, 8-Stabilizer actuator, 9-Second housing, 10-Push block, 11-First connecting rod, 12-Second connecting rod, 13-Third connecting rod, 14-Drive belt, 15-Push rod, 16-Sliding pin, 17-Safety pin, 18-Extension rod, 19-Roller, 20-Roller;

[0073] 4a - Nail exit hole, 4b - Blade exit hole;

[0074] 6a - Handle, 6b - Slot, 6c - Push button guide hole;

[0075] 7a - Push pin section, 7b - Push cutter section;

[0076] 9a - Socket, 9b - Locking edge, 9c - Guide groove;

[0077] 10a-chute, 10b-slope;

[0078] 1501 - Front rod body, 1502 - Rear rod body, 15a - Push rod guide hole. Detailed Implementation

[0079] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0080] In the description of this application and the claims, the terms "first," "second," etc., are used only to distinguish the described objects and do not have any sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two. In this application, "multiple" means not less than two.

[0081] In the description of this application and the claims, the terms "connection," "installation," and "fixation," unless otherwise specified, should be interpreted broadly. For example, "connection" can refer to a separate connection or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application based on the specific circumstances.

[0082] In the description of this application and the claims, if terms such as "above," "below," or "horizontal" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, they are only for the purpose of clearly and simply describing this application, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the drawings is flipped, an element described as "below" other elements will be positioned "above" other elements.

[0083] In the description of this application and the claims, the terms "based on" or "according to" are used to describe one or more factors that influence the determination. This term does not exclude additional factors influencing the determination. That is, the determination may be based solely on these factors or at least partially on them. For example, the phrase "A is determined based on B" means that B is a factor influencing the determination of A, and such a phrase does not exclude the possibility that the determination of A may also be based on C.

[0084] In the description of this application specification and claims, the term "configured as" is generally interchangeable with "having the ability to," "designed to," "used for," or "capable of," depending on the context.

[0085] Embodiments of this application will now be described with reference to the accompanying drawings.

[0086] Example 1

[0087] Figure 2 and Figure 3An anorectal stapler is shown for removing hemorrhoidal tissue from a patient's anorectal region. Similar to some conventional anorectal staplers, this stapler also has a head that partially or completely extends into the patient's anorectal region during use. This head has a length extending in a first direction d1, or in other words, the head extends forward from the stapler body along the first direction d1. The head is equipped with: a clamping component that clamps the hemorrhoidal tissue in a second direction d2 during use; a staple 1 that moves in a third direction d3 to engage the hemorrhoidal tissue; and a cutting blade 2 that moves in a fourth direction d4 to remove the hemorrhoidal tissue. During use, the head of the stapler extends approximately along the aforementioned first direction d1 into the patient's anorectal region, and, in conjunction with external manipulation, the hemorrhoidal tissue is treated using the aforementioned components on the head.

[0088] In this embodiment, the second direction d2 is approximately perpendicular to the first direction d1.

[0089] It is understandable that when the head of the stapler is inserted into the affected anorectal area, the length of the affected anorectal area will be arranged along the length direction of the stapler head, i.e., the aforementioned first direction d1, due to the limitation of the stapler head. In most cases, a sheath to stretch the anorectal segment to be operated on is placed in the anorectal area beforehand, and the length of the sheath and the length of the affected anorectal area are also along the aforementioned first direction d1. Therefore, the second direction d2, which is approximately perpendicular to the first direction d1, is approximately perpendicular to the length of the anorectal area. As explained in the background art of this application, the hemorrhoidal tissue 100 in the anorectal area is usually an elongated structure extending along the length direction of the affected anorectal area, and the length of the hemorrhoidal tissue 100 in the first direction d1 is several times its width in the second direction d2.

[0090] In use, once the stapler head is inserted to the correct depth, adjust the angle of the head clamping assembly to align it with the hemorrhoid tissue 100 to be removed within the rectum. Then, clamp the hemorrhoid tissue 100 along its width, preparing it for subsequent stapling and removal. Afterward, by operation, the stapler 1 moves along the third direction d3 to staple the clamped hemorrhoid tissue 100, and the cutter 2 moves along the fourth direction d4 to remove the stapled hemorrhoid tissue 100 located outside the stapler.

[0091] Because the width of the hemorrhoid tissue 100 is smaller than its length, the patient experiences less pain when the clamping component clamps the hemorrhoid tissue 100 in the width direction (second direction d2) than in the traditional method of clamping the hemorrhoid tissue in the length direction (first direction d1). Furthermore, clamping the narrow hemorrhoid tissue 100 in the width direction is easier to operate.

[0092] like Figure 4 , Figure 6 , Figure 10 , Figure 12 Also refer to Figure 3, Figure 5 , Figure 7 , Figure 9 and Figure 11 As shown, in this embodiment, the clamping assembly includes a fixed clamping seat 3 and a movable clamping seat 4 that cooperate with each other, and the movable clamping seat 4 and the fixed clamping seat 3 are arranged in the second direction d2. The clamping action of the clamping assembly is driven by a manually operated clamping actuator 5. The clamping actuator 5 is connected to the aforementioned movable clamping seat 4 through a first transmission assembly. In use, the surgeon manually actuates the aforementioned clamping actuator 5, and the clamping actuator 5 drives the movable clamping seat 4 to move towards the fixed clamping seat 3 through the first transmission assembly, thereby clamping and fixing the hemorrhoid tissue 100 to be removed between the movable clamping seat 4 and the fixed clamping seat 3 along the aforementioned second direction d2.

[0093] To facilitate the surgical procedure and the installation of related components, the anorectal stapler of this embodiment is also equipped with a first housing 6 having a handle 6a. The aforementioned clamping actuator 5 is specifically a trigger, the first end of which is... Figure 3 The upper end of the trigger extends into the first housing 6 and is pivotally connected to the first housing 6; the second end of the trigger is... Figure 3 The lower end of the device extends outside the first housing 6 for manual operation. An extension rod 18 extending forward along the first direction d1 is fixedly connected to the first housing 6, and the aforementioned movable clamp 4 is integrally fixed to the front end of the extension rod 18.

[0094] Refer to Figure 3 As shown, the aforementioned first transmission assembly mainly consists of a first connecting rod 11, a second connecting rod 12, a third connecting rod 13, and a transmission belt 14. Specifically, the first connecting rod 11 extends in a first direction d1, and this first connecting rod 11... Figure 3 The left end of the middle is fixed to the movable clamp 4. The first end of the second connecting rod 12 is also... Figure 3 The upper end is pivotally connected to the first connecting rod 11, and the second end is... Figure 3 The lower end of the third link 13 is pivotally connected to the first housing 6. Figure 3 The upper end is pivotally connected to the first connecting rod 11, and the second end is also... Figure 3 The lower end of the trigger is pivotally connected to the first housing 6. The transmission belt 14 connects the first end of the trigger and the second end of the third link 13. When the first end of the trigger rotates, the transmission belt 14 drives the second end of the third link 13 to rotate accordingly.

[0095] When using, press the button. Figure 9 The trigger in the middle causes the first end of the trigger to rotate counterclockwise around the junction with the first housing 6, thereby driving the second end of the third link 13 to rotate counterclockwise via the transmission belt 14, which in turn causes the first link 11 to move to the left and downward simultaneously. The movable clamp 4, fixed to the left end of the first link 11, presses against the fixed clamp 3 to clamp and fix the hemorrhoid tissue between the movable clamp 4 and the fixed clamp 3, as shown. Figure 11 As shown.

[0096] To prevent the transmission belt 14 from slipping during operation, gear bodies can be provided at the first end of the trigger and the second end of the third link 13, respectively. Correspondingly, the transmission belt 14 is configured as a toothed belt structure that meshes with these two gear bodies.

[0097] In order for the movable clamp 4 to be able to move after the user releases the trigger Figure 11 The mechanism automatically moves upwards to its original position. This embodiment also includes a return torsion spring (not shown in the figure) connected between the first end of the trigger and the first housing 6. This return torsion spring... Figure 3 A clockwise spring force is applied to the first end of the trigger. Obviously, the aforementioned return torsion spring can also be located in other positions, for example, between the second end of the second link 12 and the first housing 6, or between the second end of the third link 13 and the first housing 6.

[0098] Furthermore, a locking element can be configured on the first transmission assembly to lock the movable clamp 4 and the fixed clamp 3 in a clamped state, thereby freeing the user from gripping the trigger. When the movable clamp 4 needs to return to its original position, the aforementioned locking element can be unlocked. The locking element can employ various structures known to those skilled in the art, which will not be elaborated upon here.

[0099] Please refer to again Figure 4 , Figure 6 , Figure 10 , Figure 12 and Figure 14 As shown, the movable clamp 4 is provided with multiple staple exit holes 4a and one blade exit hole 4b. The staple exit holes 4a are used to receive the staples 1 and guide their movement along a third direction d3, while the blade exit hole 4b is used to receive the staples 1 and guide the cutter 2 along a fourth direction d4. It can be seen that the movable clamp 4 has a structure and function basically the same as the staple cartridge in a traditional stapler, serving both to clamp the hemorrhoid tissue and to guide the staples 1 and cutter 2 in their engagement and cutting directions; therefore, the movable clamp 4 can also be called a staple cartridge. The fixed clamp 3 is similar to the anvil in a traditional stapler.

[0100] Those skilled in the art will understand that the nail outlet hole 4a and the knife outlet hole 4b, which can achieve the above functions, have various structural forms. For example, the nail outlet hole 4a can be configured as a hole that passes through the movable clamp 4 in the third direction d3, and the knife outlet hole 4b can be configured as a hole that passes through the movable clamp 4 in the fourth direction d4; or, for another example, only a portion of the nail outlet hole 4a can be configured to extend in the third direction d3, and only a portion of the knife outlet hole 4b can be configured to extend in the fourth direction d4.

[0101] The hemorrhoid tissue 100 is clamped and contracted in the second direction d2, thus the size of the hemorrhoid tissue 100 in the clamped state in the second direction d2 is relatively small. If the anastomotic staple 1 staples the hemorrhoid tissue 100 along the clamping direction, the staple force applied to the hemorrhoid tissue during the stapleing operation is small, which is not only easy to implement, but also reduces the secondary deformation of the clamped hemorrhoid tissue and the patient's pain during the stapleing process. Therefore, in this embodiment, the staple direction of the anastomotic staple 1, that is, the aforementioned third direction d3, is set to be approximately parallel to the second direction d2, that is, the staple direction of the anastomotic staple 1 is basically consistent with the clamping movement direction of the clamping assembly.

[0102] Furthermore, to simplify the structural design of the stapler and improve its structural compactness, in this embodiment, the cutting direction of the cutter 2, i.e., the aforementioned fourth direction d4, is also set to be approximately parallel to the second direction d2. It can be seen that the second direction d2, the third direction d3, and the fourth direction d4 are essentially in the same direction, and all are approximately perpendicular to the extension direction of the stapler head—the first direction d1.

[0103] To facilitate the surgical personnel in pushing out the staples 1 and the cutting blade 2 from the staple exit hole 4a and the cutting blade exit hole 4b of the driven clamp 4, this embodiment also includes a stapler push plate 7, a stapler actuator 8, and a second transmission assembly connecting the stapler actuator 8 and the stapler push plate 7. Wherein:

[0104] Refer to Figure 4 and Figure 6 and combined Figure 3 and Figure 5 As shown, the nail pusher plate 7 is arranged on the side of the movable clamp 4 facing away from the fixed clamp 3 in the second direction d2. The nail pusher plate 7 and the fixed clamp 3 are respectively arranged on opposite sides of the movable clamp 4 in the second direction d2. The manually operated nail actuator 8 is operably connected to the nail pusher plate 7 through the second transmission assembly. In use, the nail actuator 8 is manually actuated, and the nail actuator 8 drives the nail pusher plate 7 to move towards the movable clamp 4 through the second transmission assembly, thereby pushing out the staple 1 and the cutter 2 from the staple outlet hole 4a and the cutter outlet hole 4b, respectively. It can be seen that the movement of the staple 1 and the cutter 2 is driven by the same set of components.

[0105] To ensure the smooth execution of the cutting surgery, the hemorrhoid tissue needs to be stapled first, and then the stapled hemorrhoid tissue needs to be removed. Therefore, the exit action of the staple 1 must precede the exit action of the cutting blade 2. Accordingly, this embodiment designs the stapler push plate 7 as follows:

[0106] Refer to Figure 4 , Figure 6 , Figure 10 and Figure 12As shown, the nail pusher plate 7 includes a pusher portion 7b and a nail pusher portion 7a, wherein the nail pusher portion 7a extends from the pusher portion 7b toward the movable clamp 4. The nail pusher portion 7a is operably inserted into the nail outlet hole. Thus, as the nail pusher plate 7 moves toward the movable clamp 4, the nail pusher portion 7a first contacts and pushes the staples 1, and then the pusher portion 7b contacts and pushes the cutter 2. Multiple nail pusher portions 7a are provided to push multiple staples 1 respectively.

[0107] Preferably, the pusher part 7a is always inserted into the nail outlet hole 4a whether the nail is being pushed or not, thereby reducing the possibility that the pusher part 7a may not be able to smoothly enter the nail outlet hole to push the nail during the nail pushing operation. Figure 4 and Figure 10 .

[0108] In this embodiment, the nail knife actuator 8 is a push button that can move in the first direction d1. The aforementioned second transmission assembly mainly consists of a push block 10 and a push rod 15. Specifically, the push block 10 is arranged on the side of the nail knife push plate 7 facing away from the movable clamp 4 in the second direction d2, that is, the push block 10 and the movable clamp 4 are respectively arranged on opposite sides of the nail knife push plate 7 in the second direction d2. As mentioned above, the third direction d3 and the fourth direction 4 are approximately parallel to the second direction d2, so the push block 10 and the movable clamp 4 are also respectively arranged on opposite sides of the nail knife push plate 7 in the third direction d3 and the fourth direction d4. Furthermore, the push block 10 has a slanted groove 10a that intersects the first direction d1, that is, the extending direction of the slanted groove 10a intersects the first direction d1.

[0109] The push rod 15 extends along the first direction d1, with its rear end fixedly connected to the push button, which serves as the nail knife actuator 8, and its front end pivotally connected to a roller 19 that moves through the inclined groove 10a. When the push button moves forward along the first direction d1, the roller 19 rolls along the inclined groove 10a and presses against the push block 10, moving it toward the nail knife push plate 7. The roller 19 and the inclined groove 10a are in a rolling engagement rather than a sliding engagement, resulting in low friction and smoother movement of the push block 10.

[0110] like Figure 4 and Figure 6 As shown, to reduce the possibility of the roller 19 getting stuck in the inclined groove 10a during use, this embodiment further includes a roller 20 with a diameter larger than the roller 19 coaxially connected to the roller 19. Correspondingly, an inclined surface 10b is provided on the push block 10 to contact and engage with the aforementioned roller 20 and to be arranged parallel to the inclined groove 10a. When the push rod 15 is in Figure 4 When moving to the left, before the roller 19 has made or has made minimal contact with the lower wall of the inclined groove 10a, the roller 20 has already made contact with and pressed against the inclined surface 10b, thereby primarily pushing the push block 10 downwards via the roller 20. That is, the push block 10... Figure 4The downward movement of the push rod 15 is mainly achieved by the pressure of the roller 20 on the inclined surface 10b rather than the pressure of the roller 19 on the inclined groove 10a. In this case, the cooperating inclined groove 10a and roller 19 mainly serve to limit the connection between the push rod 15 and the push block 10, preventing the push block 10 from detaching from the push rod 15. At this time, the roller 19 only serves to connect the push rod and the push block, and it can be replaced by a "connecting shaft" that does not have a "rolling" function. In some other embodiments, only the inclined surface 10b can be provided on the push block 10 without the inclined groove 10a. Correspondingly, a roller 20 that contacts and cooperates with the inclined surface 10b is provided at the front end of the push rod 15.

[0111] Two rollers 19 and two inclined grooves 10a are respectively provided. The second housing 9 is also provided with a guide structure that restricts the pusher 10 to move only along the second, third, or fourth direction, for example... Figure 8 In the middle, a guide groove 9c is integrally formed on the second housing 9 to contact and cooperate with the push block 10, and the groove depth of the guide groove 9c extends in the second direction.

[0112] The stapler is also equipped with a second housing 9 connected to the first housing 6. The push rod 15 is movably connected to the second housing 9 in a manner that allows it to move along a first direction d1, thereby better defining the direction of movement of the push rod 15. Specifically, the push rod 15 has an elongated push rod guide hole 10a extending in the first direction d1, and the second housing 9 is connected to a sliding pin 16 that movably passes through the aforementioned push rod guide hole 15a.

[0113] Furthermore, there are two sliding pins 16 in total, in order to better limit the engagement angle between the push rod 15 and the second housing 9.

[0114] To prevent the push button, which acts as the nail knife actuator 8, from... Figure 2 If the center moves to the left intentionally, it may cause accidental nail and blade ejection. This embodiment is equipped with the following safety structure:

[0115] The second housing 9 has an insertion hole 9a extending in a direction perpendicular to the first direction d1. A safety pin 17 is removably inserted into the insertion hole 9a and the aforementioned push rod guide hole 15a of the push rod 15. When the safety pin 17 is in the aforementioned assembled state, it limits the extreme position of the push rod 15's forward movement, thereby preventing the anastomotic staple 1 or the cutter 2 from being pushed out when staples and cutters are not required. When staples and cutters are needed for hemorrhoid tissue, the aforementioned safety pin 17 is removed.

[0116] If the nail pusher plate 7 is arranged completely independently on the side of the movable clamp 4, then after the second part 2000 of the stapler separates from the first part 1000, the nail pusher plate 7 is likely to fall off the movable clamp 4 and be lost. Therefore, in this embodiment, the nail pusher plate 7 is movably connected to the movable clamp 4.

[0117] It is understandable that when the clamping assembly is in a non-clamping state, the greater the distance between the movable clamp 4 and the fixed clamp 3 in the second direction d2, the wider the hemorrhoid tissue 100 can be clamped, thereby increasing the surgical range of the anorectal stapler. However, the radial dimension of the anus and rectum is limited, so the distance between the movable clamp 4 and the fixed clamp 3 cannot be increased without restriction. As mentioned earlier, the push block 10 is arranged on the side of the stapler push plate 7 facing away from the movable clamp 4 in the second direction d2, so the push block 10 will occupy the space of the clamping assembly in the second direction d2, which is not conducive to increasing the distance between the movable clamp 4 and the fixed clamp 3. Therefore, in this embodiment, the second housing 9 and the first housing 6 are set as two independent components that can be separated and joined to eliminate the occupation of the relevant space by the push block 10, as detailed below:

[0118] During the surgery, the second housing 9 with the pusher 10 is first detached from the first housing 6, and the surgical personnel hold only the stapler as follows: Figure 4 The "remaining portion" shown, and the front end of the remaining portion ( Figure 4 The left end of the stapler extends into the patient's affected anorectal area. For ease of description, the aforementioned "remaining part" is referred to as the first part 1000 of the stapler, and the second housing 9 with the pusher 10 is referred to as the second part 2000 of the stapler. Before the aforementioned steps, a sheath that expands the anorectal segment to be operated on can be placed in the anorectal area beforehand. The sheath has a notch to allow the hemorrhoid tissue to be cut to extend into the sheath through the notch, thereby improving the safety of the operation and facilitating the clamping, stapled and cut of the hemorrhoid tissue. This operation is well known to those skilled in the art, so it will not be described in detail here. At this time, because the pusher 10 does not occupy the space in the second direction d2 (which is also the radial space of the anorectal area) at the front end of the first part, the distance between the movable clamp 4 and the fixed clamp 3 can be set to be larger, thereby enabling the clamping and fixing of a larger width of hemorrhoid tissue 100. Then, align the hemorrhoid tissue 100 to be cut with the distance between the movable clamp 4 and the fixed clamp 3, and pull the trigger to clamp the hemorrhoid tissue 100 in the second direction d2, that is, in the width direction of the hemorrhoid tissue. At this time, the movable clamp 4 and the fixed clamp 3 have approached each other by a certain distance, so the front end of the first part is reduced in the second direction d2, thus leaving enough assembly space for the second part. That is, the size of the clamping assembly in the clamped state in the second direction d2 is less than the size of the clamping assembly in the non-clamped state in the second direction d2. Afterwards, join the second housing 9 with the first housing 6, insert the second part of the stapler, and position the pusher 10 on the side of the stapler pusher 7 facing away from the movable clamp 4 in the second direction d2, preparing to push the stapler pusher 7.

[0119] As can be seen, the second part of the stapler is inserted after the front end of the first part has been inserted into the patient's rectum. To ensure that components such as the pusher 10 at the front end of the second part can smoothly extend into the rectum during the insertion of the second part into the first part, thus ensuring the smooth execution of the surgery, the second housing 9 and the first housing 6 specifically employ a detachable connection structure as follows:

[0120] like Figure 4 and Figure 5 And refer to Figure 2 and Figure 3 As shown, the first housing 6 has a groove 6b extending in the first direction d1, and the second housing 9 has a retaining ridge 9b extending in the first direction d1. During assembly, the retaining ridge 9b on the second housing 9 is pushed forward into the groove 6b on the first housing 6 in the first direction d1, thereby achieving the engagement of the second housing 9 and the first housing 6. During separation, force is applied to cause the retaining ridge 9b to retract backward from the groove 6b in the first direction d1.

[0121] If the push rod 15 and the push button, which acts as the nail actuator 8, are both connected to the second housing 9, they would be disassembled and installed together with the second housing 9 during use, resulting in a large number of parts and a large overall size for the second part. This is inconvenient for the use of the anorectal stapler and also presents certain design challenges. Therefore, this embodiment further optimizes the structure of the anorectal stapler as follows:

[0122] The first housing 6 has an elongated push button guide hole 6c extending in the first direction d1. The push button, which serves as the nail knife actuator 8, is slidably connected to the aforementioned push button guide hole 6c. The push rod 15 consists of a detachably connected front rod body 1501 and a rear rod body 1502, which are arranged in the first direction d1 and both extend along the first direction d1. The push rod guide hole 15a is specifically provided on the front rod body 1501. Thus, the front rod body 1501 is connected to the second housing 9 via the push rod guide hole 15a and the aforementioned sliding pin 16. The rear rod body 1502 is fixed to the push button, which serves as the nail knife actuator 8, thereby connecting the rear rod body 1502 to the first housing 6.

[0123] As can be seen, the push button, which serves as the nail actuator 8, and the rear rod 1502 of the push rod 15 belong to the first part of the stapler described above. The front rod 1501 of the push rod 15 belongs to the second part of the stapler described above. When the second housing 9 is detached from the first housing 6, the front rod 1501 and the push block 10 are detached together with the second housing 9, while the rear rod 1502 and the push button remain on the first housing 6.

[0124] In order to protect the rear rod of the push rod 15 after the second part is detached, the rear rod 1502 can be completely housed within the first housing 6. In this embodiment, the push button guide hole 6c is extended rearward so that after the push button is moved to its extreme rearward position, the rear rod 1502 can be completely locked inside the first housing 6.

[0125] To better accommodate hemorrhoidectomy, the insertion depth of the stapler head into the body (including the insertion depth of the first and second front parts) is generally not less than 35mm. Therefore, the length of the push button guide hole 6c in the first direction d1 should not be less than 35mm, preferably 50-100mm. This is intended to ensure that when the push button is in… Figure 2 After the middle part is moved to the extreme position and the front rod 1501 of the second part is connected to the rear rod 1502 of the first part, the distance between the front end of the second part and the front end of the first part in the first direction d1 is not less than the depth of the first part inserted into the body.

[0126] The anorectal stapler can be completely removed from the human body when its first and second parts are assembled. However, as described above, in this embodiment, the second housing 9 can be pushed rearward in the first direction d1. Figure 3 The anorectal stapler can be removed from the first housing 6 in a manner from center to right, thereby allowing the first and second parts of the anorectal stapler to be withdrawn from the patient's body sequentially, which expands the usage of the anorectal stapler.

[0127] In this embodiment, both the push rod 15 and the extension rod 18 are slender plate-like structures with rectangular cross-sections.

[0128] like Figure 16 As shown, in this embodiment, the front rod 1501 and the rear rod 1502 are detachably connected in the following manner: the rear end of the front rod 1501 is provided with a locking head 1501a, and the front end of the rear rod 1502 is provided with a locking hole 1502a that is adapted to the locking head 1501a. The locking head 1501a and the locking hole 1502a are detachably connected.

[0129] Hemorrhoidal tissue 100 within the anus and rectum is typically curved, and some hemorrhoidal tissue 100 is excessively long. For hemorrhoidal tissue 100 that is longer and / or curved, it cannot be removed in one procedure and requires segmental removal. Using a straight-structured incision scalpel 2 during segmental removal of the hemorrhoidal tissue 100 not only increases patient discomfort but also increases the difficulty of the surgery. Figure 18 and Figure 19As shown, this is mainly because a straight cutter cannot completely separate each surgical segment, and there is a large connection area between the unseparated anterior tissue and the tissue body, which seriously interferes with the cutting of the next surgical segment. Therefore, this embodiment optimizes the structure of the cutter 2 as follows:

[0130] like Figure 17 And refer to Figure 14 and Figure 16 As shown, the cutter 2, viewed from the aforementioned second direction d2, is approximately L-shaped. Specifically, the cutter 2 includes: a first cutting segment 2a extending approximately along the first direction d1, and a second cutting segment 2b extending from the front end of the first cutting segment by bending. Here, "bending" in "extending by bending" can be interpreted as "at a certain angle".

[0131] like Figure 20 and Figure 21 As shown, this L-shaped cutting blade 2 with a specific angle segment has a cutting edge—the second cutting segment 2b—in the thickness direction of the hemorrhoid tissue 100. Therefore, it can completely detach each surgical segment of the hemorrhoid tissue 100, not only reducing patient pain but also facilitating the surgery. If the hemorrhoid tissue 100 is thick, although the L-shaped cutting blade 2 cannot completely remove small segments of tissue, the connection area between the remaining tissue and the tissue body is very small, making it easy to separate the previous segment of tissue, facilitating the cutting of the next segment. Figure 22 and Figure 23 As shown.

[0132] In order to maximize the cutting thickness of the hemorrhoid tissue 100 when the length of the second cutting segment 2b is limited, in this embodiment, the extension direction of the second cutting segment 2b (i.e. the direction of bending "extending" from the front end of the first cutting segment) is not only approximately perpendicular to the first direction d1, but also approximately perpendicular to the fourth direction d4.

[0133] In this embodiment, the cutter 2 is configured as a sheet-like structure that is approximately parallel to the fourth direction d2, so that the cutter 2 can be better guided to move along the fourth direction d4 during use.

[0134] To facilitate the manufacturing of the cutting blade 2, and more importantly, to reduce the risk of accidental cutting during the operation, the first blade segment 2a and the second blade segment 2b are connected by an arc transition in this embodiment.

[0135] It is easy to understand that when the radial space of the anus and rectum containing the hemorrhoid tissue to be cut is large enough, the larger the dimension of the second cutting segment 2b of the cutter 2 in the protruding direction, the easier it is to completely remove the hemorrhoid tissue in a single cutting action. However, the radial space of the anus and rectum is limited, thus restricting the dimension of the second cutting segment 2b in the protruding direction. The space of the anus and rectum in its longitudinal direction is greater than its radial space, so the first cutting segment 2a of the cutter 2 can be set relatively long to remove as much hemorrhoid tissue as possible in a single operation while ensuring surgical quality. Therefore, in this embodiment, the dimension of the second cutting segment 2b in its protruding direction is set to be smaller than the dimension of the first cutting segment 2a in the first direction d1.

[0136] It is understandable that as long as the first and second parts of the anorectal stapler can move relative to each other in the first direction d1 and have a sufficiently large range of motion, the anorectal stapler can handle a wide range of hemorrhoidal tissue 100, and it is not required that the first and second parts be able to separate from each other.

[0137] In this embodiment, the "length", "width", and "thickness" of the hemorrhoid tissue 100 can be interpreted as "the size of the hemorrhoid tissue in the length direction of the anorectal region", "the size of the hemorrhoid tissue in the circumferential direction of the anorectal region", and "the size of the hemorrhoid tissue in the radial direction of the anorectal region", respectively.

[0138] It should be noted that the cutting direction of the cutter 2 on the hemorrhoid tissue 100 is a third direction d3 that is approximately perpendicular to the first direction d1, and it is not necessary for the clamping component to be in the second direction d2 that is approximately perpendicular to the first direction d1. As long as the tissue to be removed is prepared (e.g., clamped and stapled) and has a certain size in the first direction d1, the L-shaped cutter 2 described above can achieve a similar advantageous effect when it is removed.

[0139] It should be noted that those skilled in the art will understand that for anorectal procedures where surgical space is very limited, the solution of configuring the space-consuming pusher block 10 for pushing the stapler plate as a post-installation structure, so that after the stapler body clamps and fixes the tissue to be removed, freeing up the corresponding space, the pusher block 10 can be installed in the freed-up space to push the stapler plate, can also be applied to other anorectal stapler structures. The application of this solution does not presuppose that the second direction d2 and the first direction d1 are approximately perpendicular. As long as the clamping direction intersects the extension direction of the stapler head, the aforementioned solution can be applied to treat hemorrhoidal tissue with a large size in the clamping direction.

[0140] Example 2: Anastomosing device

[0141] It is not difficult to understand that for other types of staplers used in other surgical procedures, such as digestive tract staplers and nasal staplers, as long as the stapler requires multiple sequential treatments of the lesion tissue—for example, the stapler first treats the lesion tissue (such as clamping and fixing the lesion component in Example 1), and then treats the lesion tissue a second time (such as stapled and cutted lesion components in Example 1)—and the space occupied by the relevant components changes before and after the first treatment of the lesion tissue, a similar concept to that of Example 1 can be used to design the structure of the stapler. For example, the stapler can be designed as... Figure 24 , Figure 25 and Figure 26 The structure shown, Figures 24-26 The stapler used in this method is structurally similar to that in Embodiment 1 above. Therefore, readers should refer to the content of Embodiment 1 above to understand the following description:

[0142] Figure 24 The stapler includes a first portion 1000 and a second portion 2000 movably connected in a first direction d1. The first portion 1000 has a first front end 1001 extending forward in the first direction d1, which, in use, extends substantially along the first direction d1 into the patient's body to perform a first treatment on the lesion tissue. The first front end includes a first moving member operably movable between a first position and a second position. This first moving member is typically a key element for performing the aforementioned first treatment, such as the movable clamp 4 described in Embodiment 1. Moreover, the first position has a displacement relative to the second position in a direction intersecting the first direction d1 (e.g., the second direction d2 described in Embodiment 1). That is, the first moving member in the first position has a displacement relative to the first moving member in the second position in a direction intersecting the first direction d1. The second portion 2000 has a second front end extending forward in the first direction d1, which, in use, needs to extend into the patient's body and be in a first relative position with the first front end to perform the second treatment on the lesion tissue. That is, the second part 2000 has a second front end portion 2001 extending forward in the first direction d1, which, in use, needs to be inserted into the patient's body and also needs to be in a first relative position with the aforementioned first front end portion 1001—such as... Figure 26 The relative positional relationship between the second anterior portion and the first anterior portion shown is necessary to perform the aforementioned second treatment on the lesion tissue. In other words, when performing the second treatment on the lesion tissue, the second anterior portion 2001 of the second part 2000 not only needs to extend into the patient's body, but also needs to reach a certain position relative to the first anterior portion 1001 (e.g., ...). Figure 26When the first front end portion 1001 is not in the state of performing the first treatment on the lesion tissue, the first moving member is in the position that prevents the second front end portion 2001 from moving forward in the first direction d1 to the aforementioned first relative position. Explanation: When the first front end portion 1001 is not in the state of performing the first treatment on the lesion tissue (refer to Embodiment 1) Figure 9 The first moving member is correspondingly located in the aforementioned first position, and the first moving member in the first position will prevent the second front end portion 2001 from moving forward in the first direction d1 to the aforementioned first relative position. The aforementioned "blocking" occurs because, when the first moving member is in the first position, the projection of at least a portion of the first moving member in the first direction d1 overlaps with the projection of at least a portion of the second front end portion in the first direction d1, thereby preventing the second front end portion from moving forward in the first direction d1 to the first relative position. For example, when the first moving member is in the first position, the projection of the rear end face of the first moving member in the first direction d1 overlaps with the projection of the front end face of the second front end portion in the first direction d1. In the description of this application specification and claims, unless otherwise specified, "front" and "rear" refer to the first direction d1, for example, in the above embodiment one. Figure 2 In this context, "front" refers to the direction to the left along the first direction d1, and "rear" refers to the direction to the right along the first direction d1. Therefore, the aforementioned "rear end face of the first moving part" refers to the rear end face of the first moving part along the first direction d1, for example... Figure 2 The right end face of the moving clamp 4; the aforementioned "second front end face" refers to the front end face of the second front end in the first direction d1, for example... Figure 2 The left end face of the second housing 9. When the first front end portion 1001 is in the state of performing the first treatment on the lesion tissue, the first moving member is in the aforementioned second position, which releases the obstruction to the second front end portion, due to the aforementioned first displacement. Explanation: When the first front end portion 1001 is in the state of performing the first treatment on the lesion tissue, the first moving member is correspondingly in the aforementioned second position, and the first moving member in this second position releases the aforementioned obstruction because it has generated the aforementioned first displacement in the second direction d2 (not the displacement in the first direction d1). The projections of the corresponding portions of the first front end portion and the corresponding portions of the second front end portion in the first direction no longer overlap, thereby allowing the second front end portion 2001 to move forward to the aforementioned first relative position, that is, the position where the second treatment on the lesion tissue can be performed, preparing for the second treatment on the lesion tissue, such as... Figure 25 and Figure 26 .

[0143] Thus, the first part 1000 and the second part 2000 of the stapler are inserted into the patient's body sequentially. Specifically, after the first part completes the first treatment of the lesion tissue and frees up space in the second direction d2, which intersects the insertion direction of the stapler, the second part is then inserted into the patient's body using the freed-up space for subsequent second treatment. This is particularly suitable for performing external surgeries on human tissues where space is very limited perpendicular to the insertion direction of the stapler, such as the digestive tract and nasal passages. Of course, the aforementioned second treatment can be performed solely by the second front end 2001 of the second part 2000; or it can be performed jointly by the second front end and the first front end when the second front end moves to a position that at least partially overlaps with the first moving member in the first direction d1, for example, the stapling and cutting in the above embodiment are jointly performed by the push block, the moving clamp, etc.

[0144] Both the first and second treatments target the same lesion tissue. Therefore, in most cases, it is required that when the second front end 2001 and the first front end 1001 are in a first relative position, the second front end and the first moving member at least partially overlap in the first direction d1, and the two treatments are essentially the same. The first moving member is usually the key component for the first treatment. More specifically, when the second front end 2001 and the first front end 1001 are in a first relative position, the second front end usually at least partially overlaps with the first moving member in the first direction d1, such as in Embodiment 1 above, where the push block 10 and the movable clamp 4 at least partially overlap in the first direction. "At least partially overlap in the first direction d1" means that the two have an overlapping portion in the first direction d1 (not their projections in the first direction d1).

[0145] In some embodiments, the first portion of the stapler may further include a second moving member connected to the aforementioned first moving member to drive the first moving member between a first position and a second position, and which remains at least partially outside the patient's body during use. That is, the second moving member has an external portion that remains outside the patient's body during use; for example, the first link 11 described above is such a second moving member. When the first distal end is not in a state of first treatment of the lesion tissue, i.e., when the first moving member is treating the first position, the second moving member is located in the third position. When the first distal end is in a state of first treatment of the lesion tissue, i.e., when the first moving member is treating the second position, the second moving member is located in the fourth position. The second moving member is operably movable between the third and fourth positions, the third position also having a second displacement in a second direction d2 relative to the fourth position. The element used to operate the second moving member between the third and fourth positions is typically a manual element, such as the trigger described in Embodiment 1.

[0146] When the first front end portion 1001 is not in the state of performing the first treatment on the lesion tissue, the external portion of the second moving member is in the aforementioned third position, which blocks the second front end portion from moving forward in the first direction d1 and keeps the second front end portion outside the patient's body. That is, when the first front end portion 1001 is not in the state of performing the first treatment on the lesion tissue, the second moving member is in the aforementioned third position, and the external portion of the second moving member in this third position blocks the second front end portion 2001 from moving forward in the first direction d1. Because the external portion is outside the patient's body, it generally keeps the second front end portion 2001 outside the patient's body, such as... Figure 24 Similarly, the aforementioned "external obstruction" typically occurs because, when the second moving member is in the third position, the projection of at least a portion of the external portion of the second moving member onto the first direction d1 overlaps with the projection of at least a portion of the second front end portion onto the first direction d1, thereby preventing the second front end portion from moving forward into the body, particularly the aforementioned first relative position, in the first direction d1. Figure 24 When the first anterior end portion is in the state of performing the first treatment on the lesion tissue, the second moving member is in the fourth position, where the "external obstruction" on the second anterior end portion is released, due to the aforementioned second displacement. Explanation: When the first anterior end portion 1001 is in the state of performing the first treatment on the lesion tissue, the second moving member is correspondingly in the aforementioned fourth position. Furthermore, because the second moving member in this fourth position has generated the aforementioned first displacement in the second direction d2, the aforementioned "external obstruction" is released, allowing the second anterior end portion 2001 to move forward past the second moving member into the patient's body and further reach the aforementioned first relative position, such as... Figure 25 and Figure 26 .

[0147] For example, the second moving member can typically be fixed to the first moving member (either as a single unit or separately), and the second moving member extends backward in a straight line from the first moving member in the first direction d1, such as the first link 11 in Embodiment 1.

[0148] In the description of this application and the claims, the term "generally parallel" can be interpreted as parallel, nearly parallel, or at a certain predetermined angle; "generally perpendicular" can be interpreted as perpendicular, nearly perpendicular, or at a certain predetermined angle.

[0149] The above are merely exemplary embodiments of this application and are not intended to limit the scope of protection of this application, which is determined by the appended claims.

Claims

1. A rectal stapler for hemorrhoidectomy, having a head extending forward in a first direction (d1), said head being provided with: The clamping component clamps the hemorrhoid tissue in the second direction (d2). The staple (1) is moved in the third direction (d3) to staple the hemorrhoidal tissue, and The incision (2) moves in the fourth direction (d4) to remove the hemorrhoidal tissue; Its features are, The second direction (d2) is approximately perpendicular to the first direction (d1); The third direction (d3) is approximately parallel to the second direction (d2), and the fourth direction (d4) is approximately parallel to the second direction (d2). The clamping assembly includes a movable clamp (4) and a fixed clamp (3) arranged in the second direction (d2). The anorectal stapler also includes a clamping actuator (5) connected to the movable clamp (4) via a first transmission assembly to drive the movable clamp (4) to move toward the fixed clamp (3). The anorectal stapler further includes a first housing (6) having a handle (6a), the clamping actuator (5) being a trigger with a first end extending into and pivotally connected to the first housing (6) and a second end extending out of the first housing (6), the first transmission assembly including: A first link (11) extends in the first direction (d1) and one end of the first link is fixed to the movable clamp (4); The second link (12) has its first end pivotally connected to the first link (11) and its second end pivotally connected to the first housing (6); A third link (13), the first end of which is pivotally connected to the first link (11), and the second end of which is pivotally connected to the first housing (6); and A drive belt (14) connects the first end of the trigger to the second end of the third link (13).

2. The anorectal stapler for hemorrhoidectomy according to claim 1, characterized in that, The movable clamp (4) is provided with: The staple outlet (4a) is used to receive and guide the staple (1) to move in the third direction (d3), and The blade outlet (4b) is used to receive and guide the cutter (2) to move in the fourth direction (d4).

3. The anorectal stapler for hemorrhoidectomy according to claim 2, characterized in that, The anorectal stapler also includes: A nail pusher plate (7) is arranged on the side of the movable clamp (4) facing away from the fixed clamp (3) in the second direction (d2); and The nail actuator (8) is operably connected to the nail pusher plate (7) via a second transmission assembly to drive the nail pusher plate (7) to move, thereby pushing the staple (1) and the cutter (2) out of the staple hole and the cutter hole, respectively.

4. The anorectal stapler for hemorrhoidectomy according to claim 3, characterized in that, The nail knife actuator (8) is a push button movable in the first direction (d1), and the second transmission assembly includes: Push block (10), which is arranged on the side of the nail knife push plate (7) away from the movable clamp (4) in the second direction (d2), and the push block has a slanted groove (10a) arranged intersecting the first direction (d1). A push rod (15) extends in the first direction (d1) and its front end is connected to the push button, and its rear end is pivotally connected to a roller (19) that moves through the inclined groove (10a).

5. The anorectal stapler for hemorrhoidectomy according to claim 4, characterized in that, It also includes a second housing (9) connected to the first housing (6), the push rod (15) having an elongated push rod guide hole (15a) extending in the first direction (d1), and the second housing (9) having a sliding pin (16) movably passing through the push rod guide hole (15a).

6. The anorectal stapler for hemorrhoidectomy according to claim 3, characterized in that, The nail pusher plate (7) includes: Push blade section (7b), and Push pin portion (7a) extending from the pusher portion toward the movable clamp (4); The pusher (7a) is operably extended into the nail outlet (4a).

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