Support structure and surgical instrument

Abstract

A support structure and a surgical instrument are provided. The supporting structure comprises a connecting part and a supporting part. The supporting structure is connected with the surgical anastomat through the connecting part, so that the supporting part and an end effector of the surgical anastomat are spaced in the thickness direction of the end effector. The supporting part supports the lifting wire. The tissue is lifted by the lifting line from the side, away from the supporting part, of the end effector in the thickness direction, penetrates through the nail anvil and the nail bin and is lifted towards the supporting part. According to the supporting structure provided by the embodiment of the utility model, when the tissue is lifted between the nail anvil and the nail bin, the lifting line is supported by the supporting part which is spaced from the end effector in the thickness direction of the end effector, so that the tissue penetrates through the nail anvil and the nail bin from one side, deviating from the supporting part, of the end effector to be lifted towards the supporting part. Under the support of the support part, the lifting line can roughly and uniformly stretch the tissues in the far and near directions, so that the tissues are ensured to be uniformly distributed, the postoperative cavity is helped to recover to be close to a natural state, and the problems of tissue wrinkling and the like of the cavity after the operation are avoided.

Description

Technical Field

[0001] This utility model relates to the field of surgical instruments, and in particular, to a support structure suitable for a surgical stapler and a surgical instrument having the support structure. Background Technology

[0002] Surgical staplers are widely used in various surgical procedures as an alternative to manual suturing. For example, in the treatment of anal fistulas, the end effector of a surgical stapler can be inserted into the patient's intestine to treat the tissue around the fistula opening, such as by suturing and cutting, to close the fistula. A surgical stapler may include an end effector, which may include an anvil and a staple cartridge. Staples in the cartridge are advanced and applied to the tissue held between the anvil and the cartridge.

[0003] To place tissue between the anvil and cartridge of a surgical stapler, a pull-up line can be used to lift the tissue. Specifically, one end of the pull-up line can be fixed, for example, to the tissue, and the other end can extend through the space between the anvil and cartridge to the side of the end effector away from the tissue in the thickness direction. In this way, by pulling the pull-up line distally, the tissue can be lifted between the anvil and cartridge.

[0004] However, because the tissue is pulled distally by the lifting line, the tissue on the distal side is stretched more while the tissue on the proximal side is stretched less. This results in uneven stretching of the tissue in the proximal and distal directions of the stapler, leading to uneven tissue distribution. Postoperatively, the cavity is difficult to return to its natural state, causing unintended consequences such as tissue wrinkling. Utility Model Content

[0005] In view of this, the present invention provides a support structure for a surgical stapler and a surgical instrument having the support structure, aiming to solve the problem of uneven stretching of tissue in the proximal and distal directions of the surgical stapler.

[0006] On one hand, this utility model provides a support structure. This support structure is applicable to a surgical stapler. The surgical stapler includes an end effector, which includes an anvil and a staple cartridge for storing staples. Staples are ejected and applied to tissue clamped between the anvil and the staple cartridge, and are guided and shaped by the anvil. The support structure includes a connecting portion and a supporting portion. The support structure is configured to connect to the surgical stapler via the connecting portion such that the supporting portion and the end effector are spaced apart in the thickness direction of the end effector. The supporting portion is configured to support a pull line fixed to the tissue. The tissue is pulled by the pull line from the side of the end effector away from the supporting portion in the thickness direction, through the anvil and the staple cartridge, toward the supporting portion.

[0007] According to the support structure provided in this embodiment of the invention, when the tissue is pulled between the anvil and the cartridge, the lifting line is supported by a support portion spaced apart from the end effector in the thickness direction of the end effector. This allows the tissue to be pulled from the side of the end effector away from the support portion, passing through the anvil and cartridge towards the support portion. Supported by the support portion, the lifting line can stretch the tissue approximately evenly in the proximal and distal directions, ensuring uniform tissue distribution and helping the postoperative cavity recover to a near-natural state, avoiding problems such as tissue wrinkling after surgery.

[0008] In some embodiments, the outer side of the support portion is provided with a first slot extending in the proximal direction, and the lifting line extends from the distal side of the support portion through the first slot to the proximal side of the support portion.

[0009] On one hand, when lifting tissue, the first slot guides the lifting cable, keeping it in the proper position on the support and helping it achieve the correct pulling direction, preventing it from accidentally detaching from the support during the pulling process. On the other hand, the portion of the lifting cable located outside the support will not protrude excessively or protrude beyond the outer surface of the support, reducing friction between the cable and the patient's tissue during the pulling process.

[0010] In some embodiments, a notch is provided on the distal side of the support portion, and a first slot extends from the notch portion toward the proximal side of the support portion.

[0011] With this design, during the placement of the lifting line, the line can be first inserted into the notch, and then into the first slot. The notch helps align the lifting line with the first slot, making it easier to insert the line into the first slot.

[0012] In some embodiments, the notch gradually narrows as it approaches the proximal side of the support.

[0013] Because of the structure of the notch, it is easier to insert the lifting line into the notch.

[0014] In some embodiments, the support structure further includes a fixing part configured to fix the lifting line along the pulling direction.

[0015] Because of the fixation unit, after the tissue is pulled to the appropriate position between the anvil and the cartridge, the fixation unit can be used to secure the traction line along the pulling direction. This way, even if the surgeon releases the traction line, the tissue will remain in the appropriate position between the anvil and the cartridge under the pull of the traction line. Therefore, the fixation unit helps to free the surgeon's hands and reduces the difficulty of surgical procedures.

[0016] In some embodiments, the fixing part is a second slot, which is provided on the outer side of the support part, extends from the first slot toward the proximal side of the support part, and is narrower than the first slot, so as to fix it by clamping the lifting line.

[0017] In this way, after the tissue is pulled to the appropriate position between the anvil and the staple cartridge, the lifting cable can be fixed in the pulling direction simply by inserting it into the second slot. Therefore, the fixing part, which is a second slot, has the advantages of being easy to operate and having a simple structure.

[0018] In some embodiments, the support structure includes a plurality of support portions arranged at intervals, the plurality of support portions being configured to support a plurality of pull lines distributed at intervals.

[0019] Based on this structure, multiple lifting threads can be used to lift the tissue. By controlling the lifting degree of each lifting thread individually, the tissue can be stretched more evenly, ensuring uniform tissue distribution and allowing the tissue to recover to a near-natural state after the operation.

[0020] In some embodiments, the support structure is partially ring-shaped.

[0021] Because a patient's cavities, such as the intestines, are typically tubular, a partially annular support structure adapts to the natural shape of the cavity. Thus, when the support structure and end effector are inserted into the cavity to perform surgery, the partially annular support structure supports the tissue at the suture site, keeping the tissue close to its natural state. This allows the cavity to recover to a near-natural state after suturing, ensuring minimal damage to its physiological functions.

[0022] In some embodiments, the support structure is elastic, such that under the pressure of the lifting line, the support structure contracts in the thickness direction of the end effector.

[0023] In this way, when the tissue is lifted, the supporting structure will undergo slight deformation under the action of the lifting thread, tending to shrink towards the inner diameter of the ring, thus preventing excessive expansion of the intestinal diameter, which protects the tissue.

[0024] On the other hand, this invention also provides a surgical instrument. The surgical instrument includes a surgical stapler and a support structure according to the above aspects. The surgical stapler includes an end effector, which includes an anvil and a staple cartridge for receiving staples. Staples are ejected and applied to tissue clamped between the anvil and the staple cartridge, and are guided and shaped by the anvil. The support structure is connected to the surgical stapler via a connecting portion. The support portion and the end effector are spaced apart in the thickness direction of the end effector. The support structure is configured to support a lifting line fixed to the tissue. The tissue is lifted by the lifting line from the side of the end effector away from the support portion in the thickness direction, passing through the anvil and the staple cartridge, toward the support portion.

[0025] According to the surgical instrument provided in this embodiment of the present invention, when pulling tissue between the anvil and the cartridge, the lifting suture is supported by a support portion spaced apart from the end effector in the thickness direction of the end effector, allowing the tissue to be pulled from the side of the end effector away from the support portion through the anvil and cartridge toward the support portion. Supported by the support portion, the lifting suture can stretch the tissue approximately evenly in the proximal and distal directions, ensuring uniform tissue distribution, helping the postoperative cavity to return to a near-natural state, and avoiding problems such as tissue wrinkling in the cavity after surgery.

[0026] In some embodiments, the end effector switches from an open state to a closed state to clamp tissue in the clamping space between the anvil and the staple cartridge, and the support has a support point that changes the pulling direction of the lifting cable. When the end effector is in the closed state, the support point is substantially aligned with the clamping space in the proximal direction.

[0027] Because the tissue is held in the clamping space between the anvil and the staple cartridge, and the support point of the support part is basically aligned with the clamping space in the proximal direction, the lifting line can pull the tissue in a direction that is roughly perpendicular to the proximal direction of the stapler, so that the tissue can be stretched more evenly in the proximal direction.

[0028] In some embodiments, the end effector bends to one side in its thickness direction to form a partial ring, and the support structure bends to the other side in the thickness direction of the end effector to form a partial ring, with the support structure and the end effector forming a ring as a whole.

[0029] Since a patient's cavities, such as the intestines, are typically tubular, the overall ring-shaped support structure and end effector adapt to the natural shape of the cavity. Thus, when the support structure and end effector are inserted into the cavity to perform surgery, their overall ring-shaped structure supports the tissue at the suture site, allowing the cavity to return to a near-natural state after suturing, reducing surgical damage to the cavity's physiological functions.

[0030] In some embodiments, the surgical stapler includes a frame, and movement of the frame causes an end effector to switch between an open and closed state. The frame includes two spaced-apart struts, with the end effector located between the two struts. Connecting portions are provided at opposite ends of the support structure, such that each end of the support structure is connected to one of the two struts.

[0031] The end effector is located between the two pillars of the frame, and the two ends of the support structure are connected to the two pillars respectively, making the end effector and support structure roughly loop-shaped. The connection between the two ends of the support structure and the two pillars ensures a reliable connection between the support structure and the surgical stapler. Using the two pillars of the frame to connect the support structure eliminates the need for additional connecting structures on the surgical stapler, simplifying the structure and reducing manufacturing costs. Attached Figure Description

[0032] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0033] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0034] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0035] Figure 1 This is a schematic diagram of the structure of a surgical instrument according to an embodiment of the present invention.

[0036] Figure 2 for Figure 1 Another structural diagram of surgical instruments.

[0037] Figure 3 for Figure 1 A schematic diagram of the exploded structure of surgical instruments.

[0038] Figure 4A and Figure 4B for Figure 1 A schematic diagram of the distal portion of a surgical instrument, in which the end effector of the surgical stapler is in the open state.

[0039] Figure 5 for Figure 1 Another schematic diagram of the distal portion of a surgical instrument, in which the end effector of the surgical stapler is in the closed state.

[0040] Figure 6 for Figure 1 Another structural diagram of the distal portion of a surgical instrument.

[0041] Figure 7 for Figure 1 A schematic diagram of the support structure for surgical instruments.

[0042] Figure 8 for Figure 7 Another structural diagram of the central support structure.

[0043] Figure 9 for Figure 7 Another structural diagram of the central support structure.

[0044] Figure 10 for Figure 1 A schematic diagram of the support structure of surgical instruments and the frame of surgical staplers.

[0045] Figure 11 This is a schematic diagram of the support structure according to a variation of the present invention. Detailed Implementation

[0046] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0047] <Example Surgical Instruments>

[0048] refer to Figures 1 to 3 This utility model provides a surgical instrument 100 in one embodiment. By way of example only, the surgical instrument 100 can be used in surgery to suture the opening of an internal fistula in a patient's cavity. In particular, the surgical instrument 100 can be used in anal fistula surgery, by inserting the distal portion of the surgical instrument 100 into the patient's intestine to suture the opening of the internal fistula in the intestine.

[0049] It should be noted that in this embodiment of the invention, the directional concept "far" can refer to a direction away from the surgeon, while the directional concept "near" can refer to a direction closer to the surgeon. For ease of understanding, in the accompanying drawings of this embodiment of the invention, the distal direction can be indicated by arrow X+, and the proximal direction can be indicated by arrow X-.

[0050] Surgical instrument 100 may include a surgical stapler 10 and a support structure 20. The support structure 20 may be located distal to the surgical stapler 10 and cooperate with an end effector 11 also located distally thereto. The surgical stapler 10 and the support structure 20 may be two separate components operably connected together. Before performing surgery, the surgeon may attach the support structure 20 to the surgical stapler 10, assembling the two into surgical instrument 100. Alternatively, the surgical stapler 10 and the support structure 20 may be non-operably connected together for transport, sale, and use as a single unit.

[0051] The surgical stapler 10 and the support structure 20 are illustrated below with examples.

[0052] <Example Surgical Anastomosing Device>

[0053] refer to Figures 3 to 6 The surgical stapler 10 may include a platform portion and an end effector 11, which may be located at the distal end of the platform portion. The end effector 11 may include an anvil 111 and a staple cartridge 112. The staple cartridge 112 may be used to store staples, while the anvil 111 may be used to guide staple formation.

[0054] The end effector 11 can be driven to switch between an open and closed state. Figure 4A and Figure 4B In this configuration, the end effector 11 is in the open position, and the distance between the anvil 111 and the staple cartridge 112 is relatively large to allow tissue to be inserted between them. Figure 5 In the middle, the end effector 11 is in the closed state, and the gap between the anvil 111 and the staple cartridge 112 is small to clamp the tissue located between them.

[0055] During the procedure, the end effector 11 can be inserted into the patient's cavity first. Then, with the end effector 11 open, tissue can be placed between the anvil 111 and the staple cartridge 112. Next, the end effector 11 can be switched to the closed position, clamping the tissue between the anvil 111 and the staple cartridge 112. Then, the surgical stapler 10 can be fired, ejecting the staples from the staple cartridge 112, allowing the staples to be applied to the tissue and shaped under the guidance of the anvil, completing the suturing of the tissue.

[0056] In some embodiments of this invention, the end effector 11 may also include a cutter housed in the staple cartridge 112. During firing, the cutter and staples can be ejected simultaneously, thereby achieving simultaneous cutting and suturing of the tissue. Of course, in other embodiments of this invention, the end effector 11 may not have a cutter.

[0057] For reference only, as an example Figure 3 , Figure 4A and Figure 10 The surgical stapler 10 may also include a frame 12, the movement of which can cause the end effector 11 to switch between an open and closed state. The frame 12 may include two spaced-apart struts 121, with the end effector 11 positioned between the two struts 121. As an example, an anvil 111 may be located distal to the staple cartridge 112 and fixed relative to the frame 12, the staple cartridge 112 being fixed to other components of the platform, such as the housing. The frame 12 can be driven to move in a proximal-remote direction, causing the anvil 111 to move away from or towards the staple cartridge 112, thereby switching the end effector 11 between an open and closed state.

[0058] It is understood that the power to move the drive frame 12 can come from the surgeon or from a drive device such as an electric motor. Similarly, the power to fire the surgical stapler 10 can come from the surgeon or from a drive device such as an electric motor. That is to say, the surgical stapler 10 can be manual or electric, and this embodiment of the present invention does not impose any particular limitation on this.

[0059] The surgical stapler 10 has been illustrated above. It is understood that the specific structure and working principle of the surgical stapler 10 provided in this embodiment of the present invention can be similar to those of conventional surgical staplers. For the sake of brevity, the specific structure and working principle of the surgical stapler 10 will not be described in detail here.

[0060] <Exemplary Support Structure>

[0061] refer to Figures 6 to 9 The support structure 20 may include a connecting portion 21 and a supporting portion 22. For example... Figure 6 As shown, the support structure 20 can be connected to the surgical stapler 10 via the connecting part 21, and the support part 22 can be spaced apart from the end effector 11 in the thickness direction of the end effector 11. During the operation, after locating and treating the fistula, the surgeon will suture and close the internal opening of the fistula. First, the surgeon will use surgical sutures to suture the tissue at the internal opening, so as to better position the sutured tissue between the anvil 111 and the staple cartridge 112 of the surgical stapler 10. The distal end of the surgical suture, i.e., the pull suture, is connected to the internal opening of the fistula to be closed, and the proximal end is located on the outer side of the outer wall of the support structure 20 under the pull of the surgeon. That is, with the support of the outer wall of the supported part 22, the surgeon can pull the tissue from the side away from the support part 22 in the thickness direction of the end effector 11, through the anvil 111 and the staple cartridge 112, toward the support part 22.

[0062] In this way, when the tissue is pulled between the anvil 111 and the staple cartridge 112, the lifting suture is supported by the support portion 22, which is spaced apart from the end effector 11 in the thickness direction of the end effector 11. This allows the tissue to pass through the anvil 111 and the staple cartridge 112 from the side of the end effector 11 away from the support portion 22 and be pulled towards the support portion 22. With the support of the support portion 22, the lifting suture can stretch the tissue approximately evenly in the proximal and distal directions, ensuring uniform tissue distribution, helping the postoperative cavity to recover to a near-natural state, and avoiding problems such as tissue wrinkling in the cavity after surgery.

[0063] It should be noted that, in this embodiment of the invention, the thickness direction of the end effector 11 can refer to a direction perpendicular to the proximal direction. Tissue can be stretched from one side of the thickness direction of the end effector 11 to the other side to place the tissue between the anvil 111 and the staple cartridge 112. For ease of understanding, in the accompanying drawings of this embodiment of the invention, the opposite sides of the thickness direction of the end effector 11 can be indicated by arrows Y+ and Y-, respectively.

[0064] refer to Figures 7 to 9 The outer surface of the support portion 22 may be provided with a first slot 221 extending in the proximal direction. The lifting cable can extend from the distal side (i.e., the X+ side) of the support portion 22 through the first slot 221 to the proximal side (i.e., the X- side) of the support portion 22. On one hand, when lifting tissue, the first slot 211 will guide the lifting cable, holding it in the appropriate position on the support portion 22, helping the lifting cable obtain the appropriate pulling direction, and preventing the lifting cable from accidentally detaching from the support portion 22 during the pulling process. On the other hand, the portion of the lifting cable located outside the support portion 22 will not protrude beyond or excessively protrude from the outer surface of the support portion 22, thereby reducing friction between the lifting cable and the patient's tissue during the pulling process.

[0065] Continue to refer to Figures 7 to 9 A notch 222 may be provided on the distal side of the support portion 22. A first slot 221 may extend from the notch 222 toward the proximal side of the support portion 22. Accordingly, during the placement of the lifting cable, the lifting cable can be first placed into the notch 222, and then placed into the first slot 221. During this process, the notch 222 helps align the lifting cable with the first slot 221, making it easier to place the lifting cable into the first slot 221.

[0066] Continue to refer to Figures 7 to 9 Furthermore, the notch 222 can gradually narrow as it approaches the support. That is, the width of the notch 222 gradually decreases along the direction indicated by arrow X. This construction of the notch 222 makes inserting the lifting line into it easier.

[0067] Continue to refer to Figures 7 to 9 The support structure 20 may include a fixing part 223. The fixing part 223 may be configured to fix the lifting line along the pulling direction. Due to the presence of the fixing part 223, after the tissue is pulled to a suitable position between the anvil 111 and the cartridge 112, the lifting line can be fixed along the pulling direction by the fixing part 223. Thus, even if the surgeon releases the lifting line, the tissue will still be held in the suitable position between the anvil 111 and the cartridge 112 under the pull of the lifting line. Therefore, the fixing part 223 helps to free the surgeon's hands and reduces the difficulty of surgical procedures.

[0068] This embodiment of the invention does not impose any particular limitations on the specific structure of the fixing part 223, as long as it can fix the lifting line along the pulling direction. As an example, please continue to refer to... Figures 7 to 9 The fixing part 223 can be implemented as a second slot 223. The second slot 223 can be provided on the outer side of the support part 22, extending from the first slot 221 toward the proximal side of the support part 22, and is narrower than the first slot 221, so as to fix it by clamping the lifting cable. In this way, after the tissue is lifted to the appropriate position between the anvil 111 and the staple cartridge 112, the lifting cable only needs to be inserted into the second slot 223 to fix the lifting cable. Therefore, the fixing part 223 implemented as a second slot 223 has many advantages such as more convenient operation and simpler structure.

[0069] It is understood that in other embodiments of this utility model, the fixing part may also have other structures. For example, in some embodiments, the fixing part may be a buckle, and the lifting line may be provided with a hook, so that the lifting line can be fixed along the pulling direction by engaging the hook on the lifting line with the buckle on the support part.

[0070] refer to Figures 6 to 8 The support structure 20 can be partially annular. Since a patient's cavity, such as the intestine, is typically tubular, the partially annular support structure 20 conforms to the natural shape of the cavity. Thus, when the support structure 20 and the end effector 10 are inserted into the cavity to perform surgery, the partially annular support structure 20 can support the tissue at the suture site, keeping the tissue at the suture site close to its natural state, allowing the cavity to recover to a near-natural state after suturing, and ensuring minimal damage to the cavity's physiological function.

[0071] Further reference Figures 6 to 8 The support structure 20 can be elastic, allowing it to contract towards the thickness of the end effector 11 under the pressure of the lifting line. For example, the elasticity of the support structure 20 can reduce the distance between the support portion 22 and the end effector 11 by 1 mm to 2 mm. Thus, when the tissue is lifted, the support structure 20 will undergo slight deformation under the action of the lifting line, tending to shrink towards the inner diameter of the ring, thereby preventing excessive expansion of the intestinal diameter and protecting the tissue.

[0072] Further, refer to Figure 6The end effector 10 can be bent to one side in its thickness direction to form a partial ring, while the support structure 20 can be bent to the other side in the thickness direction of the end effector 11 to form a partial ring, so that the support structure 20 and the end effector 11 are collectively ring-shaped. As mentioned above, since the patient's cavity, such as the intestine, is usually roughly tubular, the overall ring-shaped support structure 20 and end effector 11 conform to the shape of the cavity in its natural state. Thus, when the support structure 20 and end effector 11 are inserted into the cavity to perform surgery, their overall ring-shaped structure can support the tissue at the suture site, allowing the cavity to return to a near-natural state after suturing, reducing surgical damage to the physiological function of the cavity.

[0073] refer to Figure 4B , Figure 5 , Figure 8 and Figure 9 The support portion 22 may have a support point P1 that changes the pulling direction of the lifting cable. Specifically, the support point P1 may be located on the distal end face of the support portion 22, the portion of the lifting cable between the tissue and the support point P1 may extend along the thickness direction of the end effector 11, and the portion of the lifting cable after passing the support point P1 may extend in the proximal direction. Figure 5 As shown, when the end effector 11 is in the closed state, the support point P1 is substantially aligned with the clamping space S1 between the anvil 111 and the staple cartridge 112 in the proximal direction. Since the tissue is clamped in the clamping space S1 between the anvil 111 and the staple cartridge 112, and the support point P1 of the support part 22 is substantially aligned with the clamping space S1 in the proximal direction, the lifting cable can pull the tissue in a direction that is approximately perpendicular to the proximal direction, so that the tissue can be stretched more evenly in the proximal direction.

[0074] refer to Figure 10 The supporting structure 20 can be provided with connecting parts 21 at both ends, so that the two ends of the supporting structure 20 are respectively connected to the two pillars 121 of the frame 12. Figure 3 and Figure 4A The end effector 11 can be located between the two supports 121, and both ends of the support structure 20 can be connected to the two supports 121 respectively, making the end effector 11 and the support structure 20 roughly ring-shaped. The connection between the two ends of the support structure 20 and the surgical stapler 10 ensures a reliable connection. Using the two supports 121 of the frame 12 to connect the support structure eliminates the need for additional connecting structures on the surgical stapler 10, simplifying the structure and reducing manufacturing costs.

[0075] This embodiment of the invention does not impose any particular limitation on the connection method between the connecting part 21 and the support column 121. For example, in some examples, the connecting part 21 and the support column 121 can be operably connected, allowing the surgeon to detach the connecting part 21 from the support column 121 and install the connecting part 21 onto the support column 121. In other examples, the connecting part 21 and the support column 121 can be non-operably connected, joined together by means such as integral forming, welding, or bonding.

[0076] <Examples of variations in supporting structures>

[0077] According to the support structure 20a of the modified embodiment of this utility model, Figure 11 As shown in the figure. The support structure 20a in the modified example is substantially the same as the support structure 20 in the aforementioned embodiment. For the sake of brevity, the differences between the support structure 20a and the support structure 20 will be highlighted below, and the similarities will not be repeated.

[0078] refer to Figure 11 The support structure 20a may include a plurality of support portions 22 arranged at intervals, each support portion 22 being configured to support a plurality of lifting threads distributed at intervals. According to this configuration, multiple lifting threads can be used to lift the tissue, and by controlling the lifting degree of each lifting thread individually, the tissue can be stretched more evenly, ensuring that the surrounding tissue recovers to a near-natural state after surgery.

[0079] By way of example only, multiple support portions 22 can be arranged at intervals along the width direction of the end effector 11. It is understood that, in this embodiment of the invention, the width direction of the end effector 11 can refer to a direction perpendicular to both its thickness direction and its near / far direction. For ease of understanding, in the accompanying drawings of this embodiment of the invention, the opposite sides of the width direction of the end effector 11 can be indicated by arrows Z+ and Z-, respectively.

[0080] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0081] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0082] It should be understood that although terms such as "first" or "second" may be used in this invention to describe various elements (such as the first slot and the second slot), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0083] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0084] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A support structure suitable for surgical staplers, characterized in that, The surgical stapler includes an end effector comprising an anvil and a staple cartridge for storing staples, the staples being ejected to be applied to tissue clamped between the anvil and the staple cartridge and guided and shaped by the anvil. A support structure includes a connector and a support portion, the support structure being configured to connect to the surgical stapler via the connector such that the support portion is spaced from the end effector in the thickness direction of the end effector. The support portion is configured to support a pull line fixed to the tissue, the tissue being pulled by the pull line from a side of the end effector away from the support portion in the thickness direction, through the anvil and the staple cartridge, toward the support portion.

2. The support structure according to claim 1, characterized in that, The outer side of the support portion is provided with a first slot extending in the direction of distance, and the lifting line extends from the far side of the support portion through the first slot to the near side of the support portion.

3. The support structure according to claim 2, characterized in that, The support portion has a notch on its distal side, and the first slot extends from the notch toward the proximal side of the support portion.

4. The support structure according to claim 3, characterized in that, The notch gradually narrows as it approaches the side of the support.

5. The support structure according to claim 2, characterized in that, The support structure also includes a fixing part, which is configured to fix the lifting line along the pulling direction.

6. The support structure according to claim 5, characterized in that, The fixing part is a second slot, which is provided on the outer side of the support part, extends from the first slot toward the proximal side of the support part, and is narrower than the first slot, so as to fix the lifting line by clamping it.

7. The support structure according to claim 1, characterized in that, The support structure includes a plurality of support portions, which are configured to support a plurality of lifting lines respectively.

8. The support structure according to any one of claims 1 to 7, characterized in that, The support structure is partially annular and elastic, so that under the pressure of the lifting line, the support structure contracts in the thickness direction of the end effector.

9. A surgical instrument, characterized in that, include: A surgical stapler, the surgical stapler including an end effector, the end effector including an anvil and a staple cartridge for receiving staples, the staples being ejected to be applied to tissue clamped between the anvil and the staple cartridge, and being guided and shaped by the anvil; as well as According to any one of claims 1 to 8, the support structure is connected to the surgical stapler via the connecting portion, the support portion and the end effector are spaced apart in the thickness direction of the end effector, the support structure is configured to support a lifting line fixed to the tissue, the tissue being lifted by the lifting line from the side of the end effector away from the support portion in the thickness direction, through the anvil and the staple cartridge, toward the support portion.

10. The surgical instrument according to claim 9, characterized in that, The end effector switches from an open state to a closed state to clamp the tissue in the clamping space between the anvil and the cartridge. The support has a support point that changes the pulling direction of the lifting line. When the end effector is in the closed state, the support point is substantially aligned with the clamping space in the near-far direction.

11. The surgical instrument according to claim 9 or 10, characterized in that, The end effector bends to one side in its thickness direction to form a partial ring, and the support structure bends to the other side in the thickness direction of the end effector to form a partial ring. The support structure and the end effector are integrally ring-shaped.

12. The surgical instrument according to claim 11, characterized in that, The surgical stapler includes a frame, the movement of which causes the end effector to switch between an open state and a closed state. The frame includes two spaced-apart pillars, the end effector is located between the two pillars, and the support structure has connecting portions at opposite ends, such that the two ends of the support structure are respectively connected to the two pillars.

Images