Split anorectal stapler

Abstract

The present application relates to an anorectal stapler for use in hemorrhoidal tissue resection, comprising a first and second independent parts. The first part has a first front end extending forward in a first direction, the first front end including a clamping assembly for clamping hemorrhoidal tissue in a second direction, the dimension of the clamping assembly in the second direction in a clamped state being less than the dimension of the clamping assembly in the second direction in a non-clamped state, and the second direction intersects the first direction. The second part has a second front end extending forward in the first direction and cooperating with the first front end. The second part and the first part are configured such that when the clamping assembly is in a clamped state, the second part can engage with the first part by moving forward in the first direction. This anorectal stapler has an ingenious structure, is easy to use, and is capable of resecting large hemorrhoidal tissue.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a split anorectal stapler. Background Art

[0002] Hemorrhoids (piles) are the most common anal disease. Figure 1 As shown, the hemorrhoid tissue 100 is generally in the shape of a long strip at the anorectal region 200 of the patient, and its length generally extends along the longitudinal direction of the anorectal region. The length of the hemorrhoid tissue 100 is generally several times greater than its width.

[0003] An anorectal stapler is a medical device used to remove hemorrhoids. It has a head that, during use, is inserted into a patient's anus and rectum to perform treatment on the surgical site. The head of the stapler extends in a first direction, and during use, the head is inserted (partially or fully) into the patient's anus and rectum generally along the first direction.

[0004] In order to achieve the above-mentioned "related processing", the head of the stapler is generally provided with: a clamping component for clamping to fix the hemorrhoidal tissue, a stapler for stapling the clamped hemorrhoidal tissue, and a cutter for cutting the stapled hemorrhoidal tissue.

[0005] The general process of using an anorectal stapler to remove hemorrhoidal tissue in the anorectal area is as follows: first, the stapler head is inserted roughly along its length to the affected anorectal area. Then, a clamping assembly moving in a second direction clamps the hemorrhoidal tissue to be removed. The stapler head then staples the clamped hemorrhoidal tissue together using staples moving in a third direction. Finally, the stapled hemorrhoidal tissue is removed using a cutting blade moving in a fourth direction. After the removal procedure is completed, the staples remain in the body to close the wound.

[0006] Some conventional anorectal staplers, such as the one described in Publication No. CN111789652A, have a head clamping assembly with a clamping direction, a stapler stapling direction, and a cutter cutting direction that are all aligned with the stapler head's extension direction, i.e., the aforementioned first direction. Therefore, these anorectal staplers do not require much radial space in the anorectal region during use. Specifically, the conventional stapler head clamping assembly clamps and secures the hemorrhoidal tissue along its length, staples it along its length, and then separates it along its length. However, as mentioned above, hemorrhoidal tissue is typically quite long, and surgical procedures typically require the hemorrhoidal tissue to be as small as possible in the clamping direction to facilitate staple stapling. This results in the hemorrhoidal tissue being significantly deformed compared to its initial state after the stapler head clamping assembly secures it along its length, increasing the patient's pain and the risk of excessively deformed hemorrhoidal tissue during surgery.

[0007] Therefore, after extensive research, the inventors have come to the conclusion that clamping the hemorrhoidal tissue to be cut in a direction intersecting the length of the hemorrhoidal tissue could alleviate the above-mentioned problem to a certain extent. However, if the clamping assembly of the stapler head is designed to clamp the hemorrhoidal tissue in a non-lengthwise direction, the clamping assembly would occupy a large amount of radial anorectal space in the open, non-clamped state, resulting in insufficient assembly space for other functional components of the stapler head, such as the staples and the propelling element of the stapler blade.

[0008] This application arises from this. Summary of the Invention

[0009] The technical problem solved by the present application is to provide a split anorectal stapler with an ingenious structure, easy to use, and capable of removing large-sized hemorrhoidal tissue.

[0010] The technical solution of this application is:

[0011] A split anorectal stapler is used for hemorrhoidal tissue resection, and comprises a first part and a second part which are independent of each other, wherein:

[0012] The first portion has a first front end portion extending forward in a first direction and extending into the patient's body substantially along the first direction when in use, the first front end portion comprising a clamping assembly for clamping the hemorrhoidal tissue in a second direction, a dimension of the clamping assembly in a clamped state in the second direction being smaller than a dimension of the clamping assembly in a non-clamped state in the second direction, and the second direction intersects the first direction;

[0013] The second part has a second front end portion that extends forward in the first direction and, when in use, extends into the patient's body approximately along the first direction and cooperates with the first front end portion. The second part and the first part are configured so that when the clamping assembly is in the clamping state, the second part can engage with the first part by being pushed forward in the first direction.

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

[0015] The second portion and the first portion are further configured such that the second portion can be separated from the first portion by being moved backward in the first direction.

[0016] The first part includes a first shell with a handle, and the second part includes a second shell. The first shell is formed with a slot extending in the first direction, and the second shell is formed with a clip extending in the first direction and detachably engaged with the slot.

[0017] The clamping assembly includes a dynamic clamping seat and a fixed clamping seat arranged in the second direction;

[0018] The first part also includes:

[0019] a first transmission assembly, and

[0020] A clamping actuator is connected to the dynamic clamp seat through the first transmission assembly to drive the dynamic clamp seat to move toward the fixed clamp seat, thereby clamping the hemorrhoid tissue between the dynamic clamp seat and the fixed clamp seat in a second direction.

[0021] The dynamic clamping seat is provided with:

[0022] a staple hole for receiving and guiding the staple to move in a third direction substantially parallel to the second direction to staple the hemorrhoidal tissue; and

[0023] a knife exit hole for receiving and guiding the cutter to move in a fourth direction substantially parallel to the second direction to remove the hemorrhoidal tissue;

[0024] A nail cutter push plate movably connected to the dynamic clamping seat is provided on a side of the dynamic clamping seat away from the fixed clamping seat in the second direction;

[0025] The second part includes a push block provided at the second front end portion, and when the first part and the second part are in an engaged state, the push block is located on the side of the nail cutter push plate that is away from the dynamic clamp seat in the second direction;

[0026] The first part includes a manual nail cutter actuator installed on the first shell. When the first part and the second part are in an engaged state, the nail cutter actuator is connected to the push block through a second transmission assembly to drive the push block to press against the nail cutter push plate.

[0027] The nail cutter actuator is a push button that can move in the first direction, and the second transmission assembly includes a push rod extending in the first direction, which is composed of a front rod body and a rear rod body that extend in the first direction and are detachably connected. The front end of the front rod body is pivotally connected to a roller that is movably inserted into the inclined groove, and the front rod body is provided with a long push rod guide hole extending in the first direction, and the second shell is connected to a sliding pin that is movably inserted into the push rod guide hole, and the rear end of the rear rod body is fixedly connected to the push button.

[0028] The rear end of the front rod body is formed with a clamping head, and the front end of the rear rod body is formed with a clamping hole adapted to the clamping head, and the clamping head and the clamping hole are detachably connected.

[0029] A push button guide hole extending in the first direction is formed on the first shell, and the push button is movably connected to the push button guide hole.

[0030] The push button guide hole has a length of 50 to 100 mm in the first direction.

[0031] The second shell is provided with an insertion hole extending in a direction perpendicular to the first direction, and the safety pin is detachably inserted into the insertion hole and the push rod guide hole.

[0032] This application has at least the following beneficial effects:

[0033] The present application designs the anorectal stapler to be two independent and detachably connected parts, and the two parts respectively include the front end portion that needs to be inserted into the patient's body for relevant treatment when in use. It is equivalent to breaking the head of the stapler into parts, dividing it into a first head component and a second head component. The first head component is used to clamp and fix the hemorrhoidal tissue to be cut in the non-length direction, and after it clamps and fixes the hemorrhoidal tissue, it just vacates the radial space in the anorectal area, leaving space for the second head component that provides subsequent treatment (such as stapling, cutting) to extend into. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not limitations to the present application.

[0035] Figure 1 It is a schematic diagram of the organization of the organization.

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the anorectal stapler in an embodiment of the present application, wherein the clamping assembly is in a clamping state, and the anastomotic staples and the cutter are in a state of ready-to-remove staples and ready-to-remove cutters, respectively.

[0037] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the anorectal stapler.

[0038] Figure 4 yes Figure 3 An enlarged view of the X1 part.

[0039] Figure 5 yes Figure 3 Schematic diagram of the anorectal stapler after the push button is moved forward to push out the staples and cutter.

[0040] Figure 6 yes Figure 5 Enlarged view of the X2 part.

[0041] Figure 7 yes Figure 2 Schematic diagram of the first part of the anorectal stapler after the push button is retracted to the limit position.

[0042] Figure 8 yes Figure 2 Schematic diagram of the structure of the second part of the anorectal stapler.

[0043] Figure 9 yes Figure 2 Schematic diagram of the first part of the anorectal stapler with the clamping assembly in an unclamped state.

[0044] Figure 10 yes Figure 9 Enlarged view of the X3 part.

[0045] Figure 11 yes Figure 2 Schematic diagram of the first part of the anorectal stapler in the clamping state of the clamping assembly.

[0046] Figure 12 yes Figure 11 Enlarged view of the X4 section.

[0047] Figure 13 yes Figure 11 Top view of the nail cutter with the push plate removed.

[0048] Figure 14 yes Figure 13 Enlarged view of the X5.

[0049] Figure 15 yes Figure 2 Exploded view of the anorectal stapler.

[0050] Figure 16 yes Figure 15 A partial enlarged view of .

[0051] Figure 17 It is a schematic structural diagram of the cutter in the embodiment of the present application.

[0052] Figure 18 This is a demonstration of using a straight cutting knife to cut hemorrhoidal tissue.

[0053] Figure 19 yes Figure 18 Schematic diagram of the structure of hemorrhoidal tissue after the middle incision is completed.

[0054] Figure 20 This is a demonstration diagram of using the cutter of an embodiment of the present application to cut thinner hemorrhoidal tissue.

[0055] Figure 21 yes Figure 20 Schematic diagram of the structure of hemorrhoidal tissue after the cutting action is completed.

[0056] Figure 22This is a demonstration diagram of using the cutter of an embodiment of the present application to cut thicker hemorrhoidal tissue.

[0057] Figure 23 yes Figure 22 Schematic diagram of the structure of hemorrhoidal tissue after the cutting action is completed.

[0058] Description of reference numerals:

[0059] 1000-Part 1, 2000-Part 2;

[0060] 1001-first front end portion, 2001-second front end portion;

[0061] 100-hemorrhoidal tissue, 200-anorectal, 300-human body;

[0062] 101 - the connecting portion of the cut hemorrhoidal tissue segment and the uncut segment, 102 - the incision between the cut hemorrhoidal tissue segment and the uncut segment;

[0063] d1-first direction, d2-second direction, d3-third direction, d4-fourth direction;

[0064] 1-staple, 2-cutter, 3-fixed clamp seat, 4-movable clamp seat, 5-clamping actuator, 6-first housing, 7-nail cutter push plate, 8-nail cutter actuator, 9-second housing, 10-push block, 11-first connecting rod, 12-second connecting rod, 13-third connecting rod, 14-transmission belt, 15-push rod, 16-sliding pin, 17-safety latch, 18-extension rod, 19-roller, 20-roller;

[0065] 4a-nail hole, 4b-knife hole;

[0066] 6a-handle, 6b-slot, 6c-push button guide hole;

[0067] 7a-nail pushing part, 7b-knife pushing part;

[0068] 9a-jack, 9b-edge, 9c-guide groove;

[0069] 10a-chute, 10b-slope;

[0070] 1501-front rod body, 1502-rear rod body, 15a-push rod guide hole. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. It is understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0072] In the description of the specification and claims of this application, if the terms "first", "second", etc. appear, they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. In addition, "a" or "an" and similar words do not indicate a quantitative limitation, but rather indicate the presence of at least one, and "multiple" means not less than two. The "multiple" mentioned in this application means not less than two.

[0073] In the description and claims of this application, unless otherwise specified, the terms "connect," "install," and "fix" should be interpreted broadly. For example, "connect" can refer to separate or integrated connections; it can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the aforementioned terms in this application based on the specific circumstances.

[0074] In the description and claims of this application, if there are terms such as "upper," "lower," and "horizontal" indicating orientations or positional relationships, these are based on the orientations or positional relationships shown in the accompanying drawings. They are used only to facilitate a clear and simplified description of this application and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These directional terms are relative concepts and are used for relative description and clarification. They may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the figure is turned over, elements described as "below" other elements would be positioned "above" the other elements.

[0075] Throughout the specification and claims of this application, the terms "based on" and "according to" are used to describe one or more factors that influence a determination. Such terms do not exclude additional factors that influence the determination. That is, the determination may be based solely on these factors, or at least in part on these factors. For example, the phrase "A is determined based on B." In this case, B is a factor that influences the determination of A. Such a phrase does not exclude that the determination of A may also be based on C.

[0076] In the description of the present specification and claims, if the term "in response to" appears, it can generally be interchanged with "if," "when," or "at the time of," depending on the context. Therefore, the phrase "in response to determining..." can generally be interpreted as "if it is determined...", "if it is detected...", "upon determining...", "upon detecting...", or "in response to detecting...", depending on the context. "In response to" is used to indicate a causal relationship. For example, "in response to D, executing E" indicates that there is a causal relationship between the execution of E and the occurrence of D, but does not exclude the possibility that other conditions may exist for the execution of E.

[0077] In the description of the specification and claims of this application, if the term "configured to" is present, it can generally be interchanged with "having the ability to..." or "designed to..." or "for..." or "able to..." depending on the context.

[0078] In the description of this application specification and claims, if the term "module" is used, depending on the context, the "module" is software and / or hardware that can implement the predetermined function. Although the "module" is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0079] Now, embodiments of the present application are described with reference to the accompanying drawings.

[0080] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. It is understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0081] In the description of the specification and claims of this application, if the terms "first", "second", etc. appear, they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. In addition, "a" or "an" and similar words do not indicate a quantitative limitation, but rather indicate the presence of at least one, and "multiple" means not less than two. The "multiple" mentioned in this application means not less than two.

[0082] In the description and claims of this application, unless otherwise specified, the terms "connect," "install," and "fix" should be interpreted broadly. For example, "connect" can refer to separate or integrated connections; it can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the aforementioned terms in this application based on the specific circumstances.

[0083] In the description and claims of this application, if there are terms such as "upper," "lower," and "horizontal" indicating orientations or positional relationships, these are based on the orientations or positional relationships shown in the accompanying drawings. They are used only to facilitate a clear and simplified description of this application and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These directional terms are relative concepts and are used for relative description and clarification. They may change accordingly depending on the orientation of the components in the accompanying drawings. For example, if the device in the figure is turned over, elements described as "below" other elements would be positioned "above" the other elements.

[0084] Throughout the specification and claims of this application, the terms "based on" and "according to" are used to describe one or more factors that influence a determination. Such terms do not exclude additional factors that influence the determination. That is, the determination may be based solely on these factors, or at least in part on these factors. For example, the phrase "A is determined based on B." In this case, B is a factor that influences the determination of A. Such a phrase does not exclude that the determination of A may also be based on C.

[0085] In the description of the specification and claims of this application, if the term "configured to" is present, it can generally be interchanged with "having the ability to..." or "designed to..." or "for..." or "able to..." depending on the context.

[0086] Now, embodiments of the present application are described with reference to the accompanying drawings.

[0087] Figure 2 and Figure 3 An anorectal stapler is shown, which is used to remove hemorrhoidal tissue in the anorectal area of ​​a patient. Similar to some traditional anorectal staplers, this anorectal stapler also has a head that partially or completely extends into the anorectal area of ​​the patient when in use. The head has a length dimension 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 provided with: a clamping assembly that clamps the hemorrhoidal tissue in a second direction d2 when in use, a stapler 1 that moves in a third direction d3 to staple the hemorrhoidal tissue, and a cutter 2 that moves in a fourth direction d4 to remove the hemorrhoidal tissue. When in use, the head of the stapler extends into the anorectal area of ​​the patient roughly along the aforementioned first direction d1, and in combination with external operations, the hemorrhoidal tissue is subjected to relevant processing through the aforementioned related components provided on the head.

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

[0089] It can be understood that when the head of the stapler is inserted into the affected anorectal area, the length of the affected anorectal area will be limited by the stapler head, and the length of the affected anorectal area will be arranged along the length direction of the stapler head, that is, the aforementioned first direction d1. In most cases, a sheath that holds open the anorectal section to be operated on will be placed in the anorectal area in advance, and the length of the sheath and the length of the affected anorectal area will also be along the aforementioned first direction d1. Then the second direction d2 that is roughly perpendicular to the first direction d1 is roughly perpendicular to the length of the anorectal area. The background technology of this application has already explained that the hemorrhoidal tissue 100 in the anorectal area is usually a long strip 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] During use, after the stapler head is inserted to the desired depth, the angle of the head clamping assembly is adjusted to align it with the hemorrhoidal tissue 100 to be removed within the anorectal region. The hemorrhoidal tissue 100 is then clamped along its width, preparing for subsequent stapling and removal. The stapler 1 then moves along a third direction d3 to staple the clamped hemorrhoidal tissue 100, while the cutter 2 moves along a fourth direction d4 to remove the stapled hemorrhoidal tissue 100 located outside the stapler.

[0091] Because the width dimension of the hemorrhoid tissue 100 is smaller than the length dimension, when the clamping assembly clamps the hemorrhoid tissue 100 in the width direction (second direction d2) of the hemorrhoid tissue, the patient's pain is less than the traditional solution of clamping the hemorrhoid tissue in the length direction (first direction d1), and clamping the hemorrhoid tissue 100 of small width 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 dynamic clamping seat 4 that cooperate with each other, and the dynamic 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 dynamic clamping seat 4 through a first transmission assembly. During use, the surgeon manually actuates the aforementioned clamping actuator 5, and the clamping actuator 5 drives the dynamic clamping seat 4 to move toward the fixed clamping seat 3 through the first transmission assembly, thereby clamping and fixing the hemorrhoid tissue 100 to be removed between the dynamic clamping seat 4 and the fixed clamping seat 3 along the above-mentioned second direction d2.

[0093] In order to facilitate the implementation of the operation and the installation of related parts, the anorectal stapler of this embodiment is also equipped with a first housing 6 with a handle 6a. The above-mentioned clamping actuator 5 is specifically a trigger, and the first end of the trigger 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 first housing 6 extends out of the first housing 6 for manual operation. The first housing 6 is fixedly connected to an extension rod 18 extending forward along the first direction d1, and the dynamic clamp seat 4 is integrally fixed to the front end of the extension rod 18.

[0094] Refer again Figure 3 As shown, the first transmission assembly is mainly composed of a first connecting rod 11, a second connecting rod 12, a third connecting rod 13 and a transmission belt 14. The first connecting rod 11 extends in a first direction d1, and the first connecting rod 11 is Figure 3 The left end of the second connecting rod 12 is fixed to the movable clamp seat 4. Figure 3 The upper end of the middle part is pivotally connected to the first connecting rod 11, and the second end is also Figure 3 The lower end of the third connecting rod 13 is pivotally connected to the first housing 6. Figure 3 The upper end of the connecting rod is connected to the first connecting rod 11, and the second end is connected to the first connecting rod 11. Figure 3 The lower end of the trigger is pivotally connected to the first housing 6. A transmission belt 14 connects the first end of the trigger and the second end of the third connecting rod 13. When the first end connected to the trigger rotates, the second end of the third connecting rod 13 is driven to rotate by the transmission belt 14.

[0095] When using, press Figure 9 The trigger in the middle rotates the first end of the trigger counterclockwise around the connecting portion between the first housing 6 and the third connecting rod 13, thereby driving the second end of the third connecting rod 13 to rotate counterclockwise through the transmission belt 14, thereby driving the first connecting rod 11 to move leftward and downward. The dynamic clamping seat 4 fixed to the left end of the first connecting rod 11 presses against the fixed clamping seat 3 to clamp the hemorrhoidal tissue between the dynamic clamping seat 4 and the fixed clamping seat 3. Figure 11 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 connecting rod 13 respectively. Correspondingly, the transmission belt 14 is provided as a toothed belt structure meshing with the two gear bodies.

[0097] In order to enable the clamping seat 4 to be moved after the user releases the trigger Figure 11 In order to automatically move up and return to the original position, this embodiment is also equipped with a return torsion spring not shown in the figure, which is connected between the first end of the trigger and the first housing 6. Figure 3The first end of the middle trigger is applied with a clockwise elastic force. Obviously, the aforementioned return torsion spring can also be arranged at other positions, for example, between the second end of the second connecting rod 12 and the first housing 6, or between the second end of the third connecting rod 13 and the first housing 6.

[0098] Furthermore, a locking element can be configured on the first transmission assembly to lock the dynamic clamping seat 4 and the fixed clamping seat 3 in a clamped state, thereby freeing the user's grip on the trigger. When the dynamic clamping seat 4 is to be returned to its original position, the locking element can be unlocked. The locking element can employ various structures known to those skilled in the art and will not be described in detail here.

[0099] Please refer to Figure 4 、 Figure 6 、 Figure 10 、 Figure 12 and Figure 14 As shown, the dynamic clamp seat 4 is provided with a plurality of stapler holes 4a and a knife hole 4b. The stapler holes 4a are used to receive staples 1 and guide them along the third direction d3, while the knife hole 4b is used to receive staples 1 and guide the cutter 2 along the fourth direction d4. As can be seen, the dynamic clamp seat 4 has essentially the same structure and function as the staple cartridge in a conventional stapler. It is used to both clamp hemorrhoidal tissue and guide the stapling and cutting directions of the staples 1 and cutter 2. Therefore, the dynamic clamp seat 4 can also be referred to as a staple cartridge. The fixed clamp seat 3 is similar to the staple anvil in a conventional stapler.

[0100] Those skilled in the art will appreciate that various structural forms of the nail-out hole 4a and the knife-out hole 4b can achieve the above-mentioned functions. For example, the nail-out hole 4a can be configured as a hole extending through the dynamic clamp seat 4 in the third direction d3, while the knife-out hole 4b can be configured as a hole extending through the dynamic clamp seat 4 in the fourth direction d4. In another example, only a portion of the nail-out hole 4a can be configured to extend in the third direction d3, while only a portion of the knife-out hole 4b can be configured to extend in the fourth direction d4.

[0101] The hemorrhoidal tissue 100 is clamped and gathered in the second direction d2, so the size of the clamped hemorrhoidal tissue 100 in the second direction d2 is relatively small. If the staples 1 are arranged to staple the hemorrhoidal tissue along the clamping direction of the hemorrhoidal tissue 100, the stapling force applied to the hemorrhoidal tissue during the stapling operation is small, making it easier to perform and reducing secondary deformation of the clamped hemorrhoidal tissue and the pain experienced by the patient during the stapling process. Therefore, in this embodiment, the stapling direction of the staples 1, i.e., the aforementioned third direction d3, is set to be approximately parallel to the second direction d2, i.e., the stapling direction of the staples 1 is substantially consistent with the clamping movement direction of the clamping assembly.

[0102] Furthermore, to simplify the stapler's structural design and enhance its compactness, the cutting direction of the cutter 2, namely the aforementioned fourth direction d4, is also configured in this embodiment to be substantially parallel to the second direction d2. Thus, the second direction d2, the third direction d3, and the fourth direction d4 are substantially aligned and substantially perpendicular to the first direction d1, the direction of extension of the stapler head.

[0103] In order to facilitate the surgeon in pushing the staples 1 and the cutter 2 out of the staple outlet holes 4a and the cutter outlet holes 4b of the driven clamp 4, this embodiment is further provided with 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. Among them:

[0104] Refer again Figure 4 and Figure 6 Combined with Figure 3 and Figure 5 As shown, the cutter push plate 7 is arranged on the side of the dynamic clamping seat 4 facing away from the fixed clamping seat 3 in the second direction d2. The cutter push plate 7 and the fixed clamping seat 3 are respectively arranged on opposite sides of the dynamic clamping seat 4 in the second direction d2. A manually operated cutter actuator 8 is operably connected to the cutter push plate 7 via a second transmission assembly. During use, the cutter actuator 8 is manually actuated, which drives the cutter push plate 7 toward the dynamic clamping seat 4 via the second transmission assembly, thereby ejecting the staples 1 and the cutter 2 from the staple exit holes 4a and the cutter exit holes 4b, respectively. As can be seen, the movement of the staples 1 and the cutter 2 is driven by the same assembly.

[0105] To ensure the smooth implementation of the cutting operation, the hemorrhoidal tissue needs to be stapled first and then the stapled hemorrhoidal tissue needs to be removed. Therefore, the stapler 1 must be ejected before the cutter 2. Therefore, the present embodiment has the following design for the stapler push plate 7:

[0106] Refer again Figure 4 、 Figure 6 、 Figure 10 and Figure 12 As shown, the stapler push plate 7 includes a pusher portion 7b and a staple pusher portion 7a. The staple pusher portion 7a extends from the pusher portion 7b toward the dynamic clamping seat 4. The staple pusher portion 7a is operable to extend into the staple ejection hole. As the stapler push plate 7 moves toward the dynamic clamping seat 4, the staple pusher portion 7a first contacts and pushes the staples 1, followed by the pusher portion 7b contacting and pushing the cutter 2. Multiple staple pushers 7a are provided, each for pushing multiple staples 1.

[0107] Preferably, the nail pushing portion 7a always extends into the nail hole 4a when pushing the nail or not, thereby reducing the possibility that the nail pushing portion 7a cannot smoothly enter the nail hole to push the nail during the nail pushing operation. Figure 4 and Figure 10 .

[0108] In this embodiment, the nail cutter actuator 8 is a push button that can move in the first direction d1. The above-mentioned second transmission assembly is mainly composed of a push block 10 and a push rod 15. Among them, the push block 10 is arranged on the side of the nail cutter push plate 7 that is away from the dynamic clamp seat 4 in the second direction d2, that is, the push block 10 and the dynamic clamp seat 4 are respectively arranged on two opposite sides of the nail cutter push plate 7 in the second direction d2. As mentioned above, the third direction d3 and the fourth direction 4 are roughly parallel to the second direction d2, so the push block 10 and the dynamic clamp seat 4 are also respectively arranged on two opposite sides of the nail cutter push plate 7 in the third direction d3 and the fourth direction d4. In addition, the push block 10 is formed with an oblique groove 10a arranged crosswise with the first direction d1, that is, the extension direction of the oblique groove 10a intersects with the first direction d1.

[0109] Push rod 15 extends in a first direction d1. Its rear end is fixedly connected to the push button, which serves as the nail cutter actuator 8. Its front end is pivotally connected to a roller 19 that flexibly extends through an inclined slot 10a. When the push button moves forward in the first direction d1, roller 19 rolls along the inclined slot 10a, pressing push block 10 toward the nail cutter push plate 7. The roller 19 and inclined slot 10a form a rolling rather than sliding fit, resulting in low friction and smoother movement of push block 10.

[0110] like Figure 4 and Figure 6 As shown, in order to reduce the possibility that the roller 19 will be stuck in the inclined groove 10a and difficult to move during use, this embodiment further connects the roller 19 with a roller 20 having a larger diameter than the roller. Correspondingly, the push block 10 is provided with an inclined surface 10b that contacts and cooperates with the aforementioned roller 20 and is arranged parallel to the inclined groove 10a. Figure 4 When the push block 10 moves to the left, before the roller 19 has or has only slightly contacted the lower wall of the chute 10a, the roller 20 has already contacted and pressed the inclined surface 10b downward, thereby pushing the push block 10 downward mainly through the roller 20. That is, the push block 10 is Figure 4 The downward movement is primarily 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 primarily serve to define the connection between the push rod 15 and the push block 10, preventing the push block 10 from detaching from the push rod 15. In this case, the roller 19 only serves to flexibly connect the push rod and the push block and can be replaced by a "connecting shaft" without a "rolling" function. In other embodiments, the push block 10 may be provided with only the inclined surface 10b without the inclined groove 10a. Correspondingly, a roller 20 is provided at the front end of the push rod 15 to contact and cooperate with the inclined surface 10b.

[0111] The second housing 9 is also provided with a guide structure that limits the push block 10 to move only along the second, third or fourth direction, such as Figure 8In the embodiment, a guide groove 9c is integrally formed on the second housing 9 and is in contact with the push block 10. The depth of the guide groove 9c extends in the second direction.

[0112] The stapler also includes a second housing 9 connected to the first housing 6. A push rod 15 is movably connected to the second housing 9 so as to be movable along a first direction d1, thereby better defining the direction of movement of the push rod 15. Specifically, the push rod 15 is formed with an elongated push rod guide hole 10a extending in the first direction d1. A sliding pin 16 is connected to the second housing 9 and movably extends through the push rod guide hole 15a.

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

[0114] To prevent the push button as the nail cutter actuator 8 from Figure 2 In order to prevent the machine from moving to the left in an unintentional manner, which may result in accidental ejection of nails and blades, the following safety structure is configured in this embodiment:

[0115] The second housing 9 is formed with an insertion hole 9a extending perpendicular to the first direction d1. A safety pin 17 is removably inserted into the insertion hole 9a and the push rod guide hole 15a of the push rod 15. When the safety pin 17 is in the aforementioned assembled state, it defines the limit of forward movement of the push rod 15, thereby preventing the staples 1 or the cutter 2 from being ejected when the staples or cutter are not required. When it is necessary to staple or cut the hemorrhoidal tissue, the safety pin 17 is removed.

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

[0117] It can be understood that when the above-mentioned clamping assembly is in a non-clamping state, the larger the distance between the dynamic clamp seat 4 and the fixed clamp seat 3 in the second direction d2, the greater the ability to clamp hemorrhoidal tissue 100 of a larger width, thereby increasing the surgical range of the anorectal stapler. However, the radial size of the anorectal is limited, so the distance between the dynamic clamp seat 4 and the fixed clamp seat 3 cannot be increased without limit. As mentioned above, the push block 10 is arranged on the side of the nail cutter push plate 7 that is away from the dynamic clamp seat 4 in the second direction d2, so the push block 10 will occupy the space of the clamping assembly in the second direction d2, so this is not conducive to increasing the distance between the dynamic clamp seat 4 and the fixed clamp seat 3. Therefore, this embodiment sets the above-mentioned second shell 9 and the first shell 6 as two independent components, which can be detachably connected to eliminate the occupation of the relevant space by the push block 10, which is specifically described as follows:

[0118] During the operation, the second housing 9 with the push block 10 is first detached from the first housing 6, and the operating staff only holds the anastomosis device. Figure 4 The "remaining part" shown, and the front end of the remaining part ( Figure 4 The left end portion in the anus is extended into the patient's affected anorectal area. For the convenience of description, the aforementioned "remaining part" is referred to as the first part 1000 of the anastomosis device, and the second shell 9 with the push block 10 is referred to as the second part 2000 of the anastomosis device. Before the aforementioned steps, a sheath that holds open the anorectal segment to be operated on can also be placed in advance in the anorectal area. The sheath has a notch to allow the hemorrhoidal tissue to be cut to extend into the sheath from the notch, thereby facilitating the clamping, stapling and cutting of the hemorrhoidal tissue while improving the safety of the operation. This operation is well known to those skilled in the art and will not be described in detail here. At this time, because there is no push block 10 occupying 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 spacing between the dynamic clamp seat 4 and the fixed clamp seat 3 can be set larger, so that hemorrhoidal tissue 100 of a larger width can be clamped and fixed. Then, align the hemorrhoidal tissue 100 to be cut with the distance between the dynamic clamp seat 4 and the fixed clamp seat 3, and pull the trigger to clamp the dynamic clamp seat 4 and the fixed clamp seat 3 in the second direction d2, that is, the width direction of the hemorrhoidal tissue 100. At this time, the dynamic clamp seat 4 and the fixed clamp seat 3 have already approached each other by a certain distance, so the size of the front end of the first part in the second direction d2 is reduced, thereby leaving enough assembly space for the second part. That is, at this time, the size of the clamping assembly in the second direction d2 in the clamped state is less than the size of the clamping assembly in the second direction d2 in the non-clamped state. Afterwards, the second shell 9 is joined to the first shell 6, and the second part of the anastomosis device is installed, so that the push block 10 is on the side of the nail cutter push plate 7 that is away from the dynamic clamp seat 4 in the second direction d2, ready for pushing the nail cutter push plate 7.

[0119] As can be seen, the second part of the anastomosis device is installed after the front end of the first part is inserted into the patient's anus and rectum. To ensure that the push block 10 and other components at the front end of the second part can smoothly extend into the anus and rectum during the installation of the second part to the first part, thereby ensuring the smooth implementation of the operation, the second shell 9 and the first shell 6 specifically adopt the following detachable connection structure:

[0120] like Figure 4 and Figure 5 And refer to Figure 2 and Figure 3 As shown, the first housing 6 is provided with a slot 6b extending in the first direction d1, and the second housing 9 is provided with a rib 9b extending in the first direction d1. During assembly, the rib 9b on the second housing 9 is pushed forward in the first direction d1 into the slot 6b on the first housing 6, thereby achieving engagement between the second housing 9 and the first housing 6. During separation, force is applied to cause the rib 9b to withdraw backward from the slot 6b in the first direction d1.

[0121] If the push rod 15 and the push button serving as the nail cutter actuator 8 were both connected to the second housing 9 and removed and inserted together with the second housing 9 during use, the second housing would have a large number of components and be bulky. This would be inconvenient to use and would also create certain design difficulties. Therefore, this embodiment further optimizes the structure of the anorectal stapler as follows:

[0122] The first housing 6 is formed with an elongated push button guide hole 6c extending in the first direction d1. The push button, which serves as the nail cutter actuator 8, is slidably connected to the push button guide hole 6c. The push rod 15 is composed of a detachably connected front rod body 1501 and a rear rod body 1502. The front rod body 1501 and the rear rod body 1502 are arranged in the first direction d1 and both extend along the first direction d1. The push rod guide hole 15a is specifically provided in 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 cutter 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 stapler actuator 8, and the rear rod 1502 of the push rod 15 belong to the aforementioned first portion of the stapler. The front rod 1501 of the push rod 15 belongs to the aforementioned second portion of the stapler. When the second housing 9 is detached from the first housing 6, the front rod 1501 and push block 10 are detached along with the second housing 9, while the rear rod 1502 and push button remain attached to the first housing 6.

[0124] In order to allow the rear rod 1502 to be completely housed in the first housing 6 after the second portion is detached, thereby protecting the rear rod of the push rod 15, the push button guide hole 6c is extended rearward in this embodiment so that the rear rod 1502 can be completely locked into the first housing 6 after the push button is moved rearward to the limit position.

[0125] In order to better adapt to hemorrhoidectomy, the insertion depth of the stapler head into the human body (including the insertion depth of the front end of the first part and the insertion depth of the front end of the second part) 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. Its purpose is to ensure that: when the push button is in the Figure 2 After the middle right position is moved to the extreme position and the front rod body 1501 of the second part is connected with the rear rod body 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 withdrawn from the human body as a whole when the first and second parts are in the assembled state. However, according to the above description, in this embodiment, the second shell 9 can be pushed backward in the first direction d1 ( Figure 3 The anorectal stapler can be removed from the first shell 6 in a manner of (from the center to the right), so that the first part and the second part of the anorectal stapler can be withdrawn from the patient's body one after another, which expands the usage of the anorectal stapler.

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

[0128] like Figure 16 As shown, in this embodiment, the above-mentioned front rod body 1501 and rear rod body 1502 are detachably connected in this way: the rear end of the front rod body 1501 is formed with a clamping head 1501a, and the front end of the rear rod body 1502 is formed with a clamping hole 1502a adapted to the clamping head 1501a, and the clamping head 1501a and the clamping hole 1502a are detachably connected.

[0129] The hemorrhoidal tissue 100 in the anorectal area is usually curved, and some hemorrhoidal tissue 100 is too long. For such long and / or curved hemorrhoidal tissue 100, it is impossible to remove it all at once and needs to be removed in multiple sections. When removing the hemorrhoidal tissue 100 in sections, if a straight cutter 2 is used, it will not only increase the patient's pain, but also increase the difficulty of the operation. Figure 18 and Figure 19 As shown, this is mainly because it is difficult for a straight cutter to completely cut each surgical segment, and there is a large connection area between the front segment of tissue that cannot be completely cut and the tissue body, which will seriously interfere with the cutting of the next surgical segment. Therefore, this embodiment has optimized 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 is approximately L-shaped when viewed in the aforementioned second direction d2. Specifically, the cutter 2 comprises a first blade segment 2a extending generally along the first direction d1, and a second blade segment 2b extending from the front end of the first blade segment. The "bend" in "bend and extend" can be interpreted as "at a certain angle."

[0131] like Figure 20 and Figure 21As shown, this L-shaped cutter 2 with a specific angle segment has a cutting edge in the thickness direction of the hemorrhoidal tissue 100 - the second blade segment 2b. Therefore, it can completely separate each surgical segment of the hemorrhoidal tissue 100, not only reducing the patient's pain but also facilitating the operation. If the hemorrhoidal tissue 100 is thick, the L-shaped cutter 2 may not be able to completely remove the small segment of tissue. However, the connection area between the undetached tissue and the main body of the tissue after cutting is very small, which can easily separate the previous segment of tissue, making it easier to cut the next segment of tissue. Figure 22 and Figure 23 shown.

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

[0133] In this embodiment, the cutter 2 is configured as a sheet-like structure substantially 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 processing and manufacturing of the cutter 2, and more importantly, to reduce the risk of miscutting during surgery, the first blade segment 2a and the second blade segment 2b are connected by an arc transition in this embodiment.

[0135] It is not difficult to understand that, when the radial space of the anorectal region where the hemorrhoidal tissue to be cut is large enough, the larger the size of the second blade segment 2b of the cutter 2 in the extension direction, the easier it is to completely cut off the hemorrhoidal tissue in a single cutting action. However, the radial space of the anorectal region is limited, and the size of the second blade segment 2b in the extension direction is therefore limited. The space of the anorectal region in its length direction is larger than the radial space, so the first blade segment 2a of the cutter 2 can be set to be relatively long, so as to remove as much hemorrhoidal tissue as possible in a single operation while ensuring the quality of the operation. Therefore, in this embodiment, the size of the second blade segment 2b in its extension direction is set to be smaller than the size of the first blade 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 movable stroke, the anorectal stapler can process hemorrhoidal tissue 100 of a large width, and the first and second parts are not required to be separable from each other.

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

[0138] It should be noted that the cutter 2 cuts the hemorrhoidal tissue 100 in the third direction d3, which is substantially perpendicular to the first direction d1. This does not necessarily require the clamping assembly to be in the second direction d2, which is substantially perpendicular to the first direction d1. As long as the prepared tissue to be removed (e.g., clamped and stapled) has a certain size in the first direction d1, the L-shaped cutter 2 can achieve the aforementioned advantageous effects when removing the tissue.

[0139] It should be noted that those skilled in the art will understand that for anorectal surgery where the surgical operating space is very limited, the push block 10 that takes up space and is used to push the stapler push plate is set as a post-installed structure. After the stapler body clamps and fixes the tissue to be removed, thereby freeing up the corresponding space, the push block 10 is used to push the stapler push plate. This solution can also be applied to anorectal staplers of other structures. The application of this solution does not require that the second direction d2 and the first direction d1 are approximately perpendicular. As long as the clamping direction intersects with the extension direction of the stapler head, the above solution can be applied to treat hemorrhoidal tissue with a larger size in the clamping direction.

Claims

1. A split anorectal stapler for use in hemorrhoidal tissue (100) resection, characterized in that: The anorectal stapler comprises a first part and a second part which are independent of each other, wherein: The first portion has a first front end portion extending forward in a first direction (d1) and extending into the patient's body substantially along the first direction (d1) when in use, the first front end portion comprising a clamping component for clamping the hemorrhoidal tissue (100) in a second direction (d2), a dimension of the clamping component in the second direction (d2) in a clamped state being less than a dimension of the clamping component in the second direction (d2) in a non-clamped state, and the second direction (d2) being substantially perpendicular to the first direction (d1); The second portion has a second front end portion extending forward in the first direction (d1) and extending into the patient's body substantially along the first direction (d1) when in use, and cooperating with the first front end portion to staple the hemorrhoidal tissue (100), and the second portion and the first portion are configured such that: when the clamping assembly is in the clamping state, the second portion can engage with the first portion in a manner of being pushed forward in the first direction (d1); The first part comprises a first housing (6) having a handle (6a), and the second part comprises a second housing (9), the first housing (6) being provided with a slot (6b) extending in the first direction (d1), and the second housing (9) being provided with a clip edge (9b) extending in the first direction (d1) and being detachably clipped to the slot; The clamping assembly comprises a dynamic clamping seat (4) and a fixed clamping seat (3) arranged in the second direction (d2); The first part also includes a first transmission assembly, which includes a first connecting rod, a second connecting rod, a third connecting rod and a transmission belt. The first connecting rod extends in the first direction and is fixed to the dynamic clamp seat. The first end of the second connecting rod is pivotally connected to the first connecting rod, and the second end is pivotally connected to the first shell. The first end of the third connecting rod is pivotally connected to the first connecting rod, and the second end is pivotally connected to the first shell. The transmission belt connects the first end of the trigger and the second end of the third connecting rod. When the first end of the trigger rotates, the second end of the third connecting rod is driven to rotate by the transmission belt.

2. The split anorectal stapler according to claim 1, characterized in that: The second portion and the first portion are further configured such that the second portion can be separated from the first portion by being moved backward in the first direction (d1).

3. The split anorectal stapler according to claim 2, characterized in that: The first part also includes: A clamping actuator (5) is connected to the dynamic clamp seat (4) through the first transmission assembly to drive the dynamic clamp seat (4) to move toward the fixed clamp seat (3), thereby clamping the hemorrhoid tissue (100) between the dynamic clamp seat (4) and the fixed clamp seat (3) in a second direction (d2).

4. The split anorectal stapler according to claim 3, characterized in that: The dynamic clamping seat (4) is provided with: a staple hole (4a) for receiving and guiding the staple (1) to move in a third direction substantially parallel to the second direction (d2) to staple the hemorrhoidal tissue (100); and a knife exit hole (4b) for receiving and guiding the cutter (2) to move in a fourth direction substantially parallel to the second direction (d2) to remove the hemorrhoidal tissue (100); A nail cutter push plate (7) movably connected to the dynamic clamp seat (4) is provided on a side of the dynamic clamp seat (4) away from the fixed clamp seat (3) in the second direction (d2); The second part comprises a push block (10) provided at the second front end portion, and when the first part and the second part are in an engaged state, the push block (10) is located on the side of the nail cutter push plate (7) facing away from the dynamic clamp seat (4) in the second direction (d2); The first part includes a manual nail cutter actuator (8) installed on the first shell (6). When the first part and the second part are in an engaged state, the nail cutter actuator (8) is connected to the push block (10) through a second transmission assembly to drive the push block (10) to press against the nail cutter push plate (7).

5. The split anorectal stapler according to claim 4, characterized in that: The push block (10) is provided with an oblique groove arranged crosswise with the first direction (d1); the nail cutter actuator (8) is a push button capable of moving in the first direction (d1); the second transmission assembly includes a push rod (15) extending in the first direction (d1); the push rod (15) is composed of a front rod body (1501) and a rear rod body (1502) respectively extending in the first direction (d1) and detachably connected; the front end of the front rod body (1501) is pivotally connected to a roller (19) movably inserted into the oblique groove (10a); the front rod body (1501) is provided with a long push rod guide hole (15a) extending in the first direction (d1); the second housing (9) is connected with a sliding pin (16) movably inserted into the push rod guide hole (15a); the rear end of the rear rod body (1502) is fixedly connected to the push button.

6. The split anorectal stapler according to claim 5, characterized in that: The rear end of the front rod body (1501) is formed with a clamping head (1501a), and the front end of the rear rod body (1502) is formed with a clamping hole (1502a) adapted to the clamping head. The clamping head (1501a) and the clamping hole (1502a) are detachably connected.

7. The split anorectal stapler according to claim 6, characterized in that: A push button guide hole (6c) extending in the first direction (d1) is formed on the first shell (6), and the push button is movably connected to the push button guide hole (6c).

8. The split anorectal stapler according to claim 7, characterized in that: The length of the push button guide hole (6c) in the first direction (d1) is 50 to 100 mm.

9. The split anorectal stapler according to claim 8, characterized in that: The second housing (9) is provided with a socket (9a) extending in a direction perpendicular to the first direction (d1), and a safety pin (17) is detachably inserted into the socket (9a) and the push rod guide hole (15a).

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