A staple cartridge assembly for a surgical instrument and a surgical instrument

Abstract

The application discloses a kind of staple cartridge assembly and surgical instrument for surgical instrument, surgical instrument includes end effector, and end effector includes staple cartridge seat and the resistance to nail seat of rotation connection with staple cartridge seat;Staple cartridge assembly includes staple cartridge body and multiple anastomosis nails, anastomosis nail is pushed out from nail cavity along Z axial direction and moves towards resistance to nail seat when being fired, and anastomosis nail includes nail crown, first nail leg and second nail leg, and nail crown is arranged in arc shape;When anastomosis nail is in forming state, the projection of first nail leg in Z axial direction is tangent or substantially tangent with first arc line, and the projection of second nail leg in Z axial direction is tangent or substantially tangent with first arc line.Make first nail leg and nail crown, second nail leg and nail crown, in Z axial direction, substantially relative, so that the tissue being clamped by anastomosis nail is simultaneously subjected to pressure on both sides in Z axial direction, so that the effect of being clamped to tissue is better.Thereby the incision of cut tissue part is relatively tightly sutured, and the probability that tissue incision bleeds and leaks is reduced.

Description

Technical Field

[0001] This invention relates to the field of surgical instrument technology, and in particular to a staple cartridge assembly and a surgical instrument. Background Technology

[0002] Surgical staplers are commonly used medical instruments that replace manual suturing. Their main working principle is to use a scalpel to sever tissue and titanium staples to anastomose it, similar to a stapler. Depending on the body part they are used for, staplers can be categorized into various types. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. This creates a longitudinal incision in the tissue, and staples are applied to the opposite sides of the incision, thereby severing and anastomosing the tissue.

[0003] The surgical instrument includes an end effector, which comprises a staple cartridge seat and an anvil. The staple cartridge seat receives a staple cartridge assembly. The staple cartridge assembly includes a staple cartridge body and staples disposed within the staple cartridge body. The staple cartridge body has several staple cavities for receiving the staples. The staple cartridge body includes a top surface with a staple exit port formed by the staple cavities penetrating the top surface. Once the surgeon determines that the end effector has gripped the target tissue, the surgical cutting stapler can be fired to cut and suture the tissue. During suturing, the top surface contacts the sutured tissue, and the cutting element within the surgical cutting stapler pushes a wedge-shaped staple pusher within the staple cartridge, thereby causing the staple actuator to drive the staples within the staple cartridge upward from the staple cavities, piercing and suturing the target tissue (i.e., staple exit).

[0004] In thoracic surgery, an anastomosis device typically inserts into the thoracic cavity between two adjacent ribs using an end effector to clamp, cut, and suture tissue. Given the narrow gap between the ribs, the end effector is designed to be as narrow as possible. Current technology reduces the width of the end effector by changing the conventional single-sided three-row anastomosis chamber to a two-row chamber, and uses curved anastomosis staples in the two rows. However, after the curved staples are formed, the force exerted on the tissue by the staple crown is misaligned with the force exerted on the tissue by the bent staple legs, resulting in poor tissue clamping and making the incision prone to bleeding and air leakage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention aims to provide a staple cartridge assembly and surgical instruments for use in surgical instruments, which can improve the clamping effect of staples on tissues and reduce the probability of bleeding and air leakage at tissue incision sites.

[0006] This invention is achieved through the following technical solution: a staple cartridge assembly for surgical instruments, the surgical instrument including an end effector, the end effector including a staple cartridge seat and an anvil seat rotatably connected to the staple cartridge seat; the staple cartridge assembly including a staple cartridge body and a plurality of staples, the staple cartridge body having a plurality of staple cavities, the staples being disposed in the staple cavities, when the staples are fired, being pushed out from the staple cavity along the Z-axis direction toward the anvil seat, the anvil seat abutting against the staples to shape the staples, the staple including a staple crown, a first staple leg and a second staple leg, the staple crown being arc-shaped, the projection of the staple crown in the Z-axis direction being a first arc; when the staple is in the shaped state, the projection of the first staple leg in the Z-axis direction is tangent or approximately tangent to the first arc, and the projection of the second staple leg in the Z-axis direction is tangent or approximately tangent to the first arc.

[0007] Furthermore, the first stud leg has a first bevel on the side away from the stud crown, and a first stud tip is formed through the first bevel. The second stud leg has a second bevel on the side away from the stud crown, and a second stud tip is formed through the second bevel. During the process of the staple switching from the initial state to the forming state, the first bevel is in contact with the anvil to guide the first stud leg to form, and the second bevel is in contact with the anvil to guide the second stud leg to form.

[0008] Furthermore, the first inclined surface is inclined along the first direction, and the straight line drawn along the first direction through the first nail tip is the first straight line; when the staple is in the initial state, the projection of the first straight line in the Z-axis direction is the first guide line; during the process of the staple switching from the initial state to the forming state, the first inclined surface fits against the anvil to guide the first nail leg to form along the first guide line, and the first guide line is tangent or approximately tangent to the first arc.

[0009] The second inclined surface is inclined along the second direction, and the straight line drawn along the second direction through the tip of the second nail is the second straight line; when the staple is in the initial state, the projection of the second straight line in the Z-axis direction is the second guide line. During the process of the staple switching from the initial state to the forming state, the second inclined surface fits against the anvil to guide the second nail leg to form along the second guide line. The second guide line is tangent to or approximately tangent to the first arc.

[0010] Furthermore, when the staple is in the initial state, the projection of the first staple leg in the Z-axis direction is tangent to or approximately tangent to the first arc, and the projection of the second staple leg in the Z-axis direction is tangent to or approximately tangent to the first arc.

[0011] Furthermore, the staple cartridge assembly also includes a staple pusher and a plurality of staple pusher blades, the staple pusher blades being partially located within the staple cavity and supporting the staples, and in response to the movement of the staple pusher, the staple pusher blades moving along the Z-axis direction to fire the staples.

[0012] The present invention also provides a surgical instrument, including an operating component, a shaft component, and a jaw component. The proximal end of the shaft component is connected to the operating component, and the distal end is connected to the jaw component. The jaw component includes a staple cartridge seat and an anvil rotatably connected to the staple cartridge seat. It also includes a staple cartridge component as described above, which is detachably mounted to the staple cartridge seat. The operating component drives the shaft component to move, thereby firing a plurality of anastomotic staples from the staple cavity opening toward the anvil. The anvil is provided with a plurality of shaped portions, each corresponding one-to-one with a plurality of staple cavity openings of the staple cartridge component, to shape the anastomotic staples fired from the plurality of staple cavity openings.

[0013] Furthermore, each of the molding portions includes a first molding portion and a second molding portion, the first molding portion having a first path and the second molding portion having a second path;

[0014] After the staple is fired along the Z-axis, the first staple leg is formed along the first path; the second staple leg is formed along the second path.

[0015] Furthermore, the angle between the first path and the longitudinal direction is 10°-40°, and the angle between the second path and the longitudinal direction is 10°-40°.

[0016] Furthermore, the first molding part includes a first molding bottom surface and a first limiting wall. The first molding bottom surface includes a first path formed between its first end and its last end. The first limiting wall is disposed on both sides of the first molding bottom surface to guide the first pin leg, so that the first pin leg moves along the first path to be molded. The second molding part includes a second molding bottom surface and a second limiting wall. The second molding bottom surface includes a second path formed between its first end and its last end. The second limiting wall is disposed on both sides of the second molding bottom surface to guide the second pin leg, so that the second pin leg moves along the second path to be molded.

[0017] Furthermore, the anvil includes a molding surface, and each of the molding portions is disposed on the molding surface. The first molding portion further includes a first guide wall, one end of which is connected to the first end of the first molding bottom surface, and the other end of which is connected to the molding surface. The first pin leg moves to the first end of the first molding bottom surface via the guidance of the first guide wall. The second molding portion further includes a second guide wall, one end of which is connected to the first end of the second molding bottom surface, and the other end of which is connected to the molding surface. The second pin leg moves to the first end of the second molding groove via the guidance of the second guide wall.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: After the arc-shaped staples of the staple cartridge assembly are formed, the projection of the first staple leg in the Z-axis direction is tangent to the first arc, and the projection of the second staple leg in the Z-axis direction is also tangent to the first arc. This makes the first staple leg and the staple crown, and the second staple leg and the staple crown, substantially opposite each other in the Z-axis direction, so that the tissue clamped by the staples is simultaneously subjected to pressure from both sides in the Z-axis direction, resulting in better tissue clamping. Consequently, the cut tissue portion is sutured more tightly, reducing the probability of bleeding and air leakage from the tissue incision. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the surgical instrument according to the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the staple cartridge assembly according to the first embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the staple cartridge assembly according to the first embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the anastomosis staple according to the first embodiment of the present invention;

[0023] Figure 5 This is a front view of the anastomosis staple of the first embodiment of the present invention in its initial state;

[0024] Figure 6 This is a schematic diagram of the anastomosis staple in the first embodiment of the present invention when it is in the formed state;

[0025] Figure 7 This is a top view of the anastomosis staple of the first embodiment of the present invention in the formed state;

[0026] Figure 8 This is a schematic diagram of the structure of the anastomosis staple in the first embodiment of the present invention on the first side of the tissue when it is in the formed state;

[0027] Figure 9This is a schematic diagram of the structure of the anastomosis staple in the first embodiment of the present invention on the second side of the tissue when it is in the formed state;

[0028] Figure 10 A schematic diagram is shown showing that when the staples are in the forming state, the projections of the first and second staple legs in the Z-axis direction are tangent to the first arc.

[0029] Figure 11 A schematic diagram is shown showing that when the staples are in the forming state, the projections of the first and second staple legs in the Z-axis direction are approximately tangent to the first arc.

[0030] Figure 12 This is a schematic diagram of the structure of the first side of the tissue when the anastomosis staple of the first embodiment of the present invention is in the formed state;

[0031] Figure 13 This is a schematic diagram of the structure of the second side of the tissue when the anastomosis staple of the first embodiment of the present invention is in the formed state;

[0032] Figure 14 This is a schematic diagram of the anastomosis staple in its initial state according to the first embodiment of the present invention;

[0033] Figure 15 This is a schematic diagram of the structure of the anastomosis staple penetrating the tissue according to the first embodiment of the present invention;

[0034] Figure 16 This is a schematic diagram of the anastomosis staple continuing to move along the Z-axis after penetrating the tissue according to the first embodiment of the present invention;

[0035] Figure 17 This is a schematic diagram of the structure of the staple near the anvil in the first embodiment of the present invention;

[0036] Figure 18 This is a schematic diagram of the structure of the first guide line according to the first embodiment of the present invention;

[0037] Figure 19 This is a schematic diagram of the anastomosis staple of the first embodiment of the present invention during the molding process;

[0038] Figure 20 This is a schematic diagram of the anastomosis staple in the forming state according to the first embodiment of the present invention;

[0039] Figure 21 This is a schematic diagram showing the positional relationship between the projections of the first path and the second path in the Z-axis direction and the first arc in the first embodiment of the present invention.

[0040] Figure 22 This is a schematic diagram of the structure when the first guide line and the second guide line are tangent to the first arc line according to the first embodiment of the present invention;

[0041] Figure 23 This is a schematic diagram of the structure when the first guide line and the second guide line of the first embodiment of the present invention are approximately tangent to the first arc line;

[0042] Figure 24 This is a schematic diagram showing the positional relationship between the projections of the first and second pins in the Z-axis direction and the first arc in the first embodiment of the present invention.

[0043] Figure 25 This is a schematic diagram of the staple cartridge assembly according to the first embodiment of the present invention;

[0044] Figure 26 This is a schematic diagram of the pusher pin structure according to the first embodiment of the present invention;

[0045] Figure 27 This is a schematic diagram of the structure of the nail pusher according to the first embodiment of the present invention;

[0046] Figure 28 This is a schematic diagram of the structure of the anastomotic staple in the first embodiment of the present invention when it is fired;

[0047] Figure 29 This is a schematic diagram of the anvil of the second embodiment of the present invention;

[0048] Figure 30 This is a schematic diagram of the molding part according to the second embodiment of the present invention;

[0049] Figure 31 This is a schematic diagram of the structure of the first molding part according to the second embodiment of the present invention;

[0050] Figure 32 This is a cross-sectional view of the anastomosis staple moving toward the molding part according to the second embodiment of the present invention;

[0051] Figure 33 This is a schematic diagram of the structure of the anastomosis staple against the first guide wall according to the second embodiment of the present invention;

[0052] Figure 34 This is a schematic diagram of the structure of the anastomosis staple reaching the first end of the first path according to the second embodiment of the present invention;

[0053] Figure 35 This is a schematic diagram showing the positional relationship between the first guide line and the first path when the anastomosis staple is at the beginning of the first path according to the second embodiment of the present invention;

[0054] Figure 36 This is a schematic diagram of the anastomosis staple in the forming process according to the second embodiment of the present invention;

[0055] Figure 37 This is a schematic diagram of the structure of the anastomosis staple in the forming state according to the second embodiment of the present invention;

[0056] Figure 38 yes Figure 29 A partial schematic diagram of point A in the middle.

[0057] in:

[0058] 100. End effector; 110. Pin cartridge holder;

[0059] 200, Anchor seat; 210, Molding surface; 211, Spacer groove; 220, Molding part; 221, First molding part; 2211, First path; 2212, First molding bottom surface; 22121, First end; 22122, Tail end; 2213, First limiting wall; 22131, First edge line; 2214, First guide wall; 2215, Outer side; 2216, Inner side; 222, Second molding part; 2221, Second path; 2222, Second molding bottom surface; 2223, Second limiting wall; 2224, Second guide wall;

[0060] 300. Shaft assembly;

[0061] 400. Operation components;

[0062] 500. Staple cartridge assembly; 510. Staple cartridge body; 511. Cutting groove; 512. Staple cavity; 513. Staple pusher; 5131. Arc-shaped support groove; 514. Staple pusher; 5141. Rib; 5142. Rib plate; 515. Staple pusher groove; 516. Bracket;

[0063] 600, staple; 610, first side staple leg; 611, first connecting portion; 612, first staple leg; 6121, first staple tip; 6122, first bevel; 6123, first straight line; 6124, first guide line; 6125, first direction; 620, second side staple leg; 621, second connecting portion; 622, second staple leg; 6221, second staple tip; 6222, second bevel; 6223, second straight line; 6224, second guide line; 6225, second direction; 630, staple crown; 631, first arc; 632, first tangent;

[0064] 700. Cutting blade assembly. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0066] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the stapler's handle. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther away. That is, the handle is proximal, and the jaw assembly is distal. For example, the proximal end of a component refers to the end relatively closer to the handle, and the distal end refers to the end relatively closer to the jaw assembly. The terms "upper" and "lower" are relative to the relative positions of the anvil and stapler seat on the jaw assembly; specifically, the anvil is "upper," and the stapler seat is "lower." However, staplers can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0067] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0068] Example 1

[0069] This embodiment discloses a stapler assembly 500 for surgical instruments, wherein the surgical instrument can be a stapler, such as... Figures 1 to 3 As shown, the surgical instrument includes an end effector 100, a cutting blade assembly 700, a lever assembly 300, and an operating assembly 400. The end effector 100 includes a jaw assembly and a staple cartridge assembly 500. The jaw assembly includes a staple cartridge seat 110 and an anvil 200. The staple cartridge assembly 500 is detachably mounted to the staple cartridge seat 110. The anvil 200 is rotatably connected to the staple cartridge seat 110. The jaw assembly has an open state and a closed state. In response to the operation of the operating assembly 400 by a medical professional, the cannula of the lever assembly 300 moves back and forth, allowing the anvil 200 to selectively move between the open and closed positions, thus switching the jaw assembly between the open and closed states. When the jaw assembly is in the open state, human tissue can enter the jaw assembly; when the jaw assembly is in the closed state, it clamps the human tissue. In response to the operation of the operating component 400 by medical staff, the lever assembly 300 moves to drive the cutting blade assembly 700 forward to cut the tissue. During the forward movement of the cutting blade, the staples 600 in the staple cartridge assembly 500 are simultaneously fired to suture the incision in the tissue and prevent blood from seeping out of the incision.

[0070] The surgical instrument in this embodiment is a stapler used in thoracic surgery. The end effector 100 generally needs to be inserted into the body through the gap between two ribs. Therefore, the width of the end effector 100 is relatively narrow, that is, the width of the staple cartridge seat 110, the width of the anvil seat 200, and the width of the staple cartridge assembly 500 are all relatively narrow. The staple cartridge assembly includes a staple cartridge body 510 and a bracket 516. The staple cartridge body 510 is provided with a cutting groove 511 and a staple cavity 512. The cutting groove 511 provides movement for the cutting blade assembly 700 and guides the movement of the cutting blade. The staple cavities 512 are located on the left and right sides of the cutting groove 511. In the width direction of the staple cartridge assembly 500, multiple staple cavities 512 arranged along the longitudinal direction form a row. Multiple rows of staple cavities 512 are provided on each side of the cutting groove 511. In this embodiment, the staple cartridge body 512 has two rows of staple cavities 512 on each side of the cutting groove 511. Compared with the ordinary staple cartridge with three rows of staple cavities 512 on each side of the cutting groove 511, the staple cartridge body 510 in this embodiment is narrower. Therefore, the width of the staple cartridge seat 110 and the abutment seat 200 can also be smaller, making the width of the end effector 100 smaller. This allows it to be better inserted into the body through the gap between two ribs, avoiding rib pain caused by the larger width of the end effector 100, facilitating surgical operations, and reducing patient suffering.

[0071] like Figures 2 to 4 As shown, the staple cartridge assembly 500 also includes a plurality of staples 600, which are respectively disposed in a plurality of staple cavities 512. Each staple 600 includes a staple crown 630, a first side staple leg 610, and a second side staple leg 620. The cutting blade assembly 700 can move along the cutting groove 511 to cut the tissue. The staple cartridge assembly 500 also includes a staple pusher 514, which is located at the end of the staple cartridge body 501 in its initial position. When the cutting blade assembly 700 moves within the cutting groove 511, it can push the staple pusher 514 to move along the longitudinal direction of the staple cartridge body 501. The moving staple pusher 514 fires the staples 600 located in the staple cavity 512, causing the staples 600 to be pushed out of the staple cavity 512 along the Z-axis and move toward the anchor seat 200. The staples 600 are shaped by the cooperation between the staple cartridge assembly 500 and the anchor seat 200. Specifically, the staples 600 moving toward the anchor seat 200 pass through the clamped tissue through the first side staple leg 610 and the second side staple leg 620 and abut against the anchor seat 200. The anchor seat 200 bends and deforms the first side staple leg 610 and the second side staple leg 620, thereby putting the staples 600 in a shaped state. Multiple staples 600 change from the initial state to the formed state and suture the tissue incision cut by the cutting blade assembly 700.

[0072] like Figure 5 and Figure 6As shown, the first side staple leg 610 includes a first connecting portion 611 and a first staple leg 612. One end of the first connecting portion 611 is connected to the staple crown 630, and the other end is connected to the first staple leg 612. The second side staple leg 620 includes a second connecting portion 621 and a second staple leg 622. One end of the second connecting portion 621 is connected to the staple crown 630, and the other end is connected to the second staple leg 622. When the anastomosis staple 600 is in the initial state, the first connecting portion 611 and the first staple leg 612 are on the same straight line, and the second connecting portion 621 and the second staple leg 622 are on the same straight line. When the anastomosis staple 600 switches from the initial state to the formed state, the first staple leg 612 passes through the tissue and bends under the action of the anvil seat 200; the second staple leg 622 passes through the tissue and bends under the action of the anvil seat 200. When the staple 600 is in the formed state, the first connecting part 611 is located in the tissue and the first staple leg 612 is in a bent state; the second connecting part 621 is located in the tissue and the second staple leg 622 is in a bent state.

[0073] Figure 7 The diagram shows a top view of the staples 600 in their formed state. In this state, the staple crown 630 on one side of the tissue presses against the tissue, while the first staple leg 612 and the second staple leg 622 on the other side also press against the tissue. This allows the staple crown 630 to apply pressure to the tissue from one side, and the first and second staple legs 612 and 622 to apply pressure from the other side, thus clamping the tissue. In this embodiment, the staple crown 630 is located on the first side of the tissue, and the first and second staple legs 612 and 622 are located on the second side. During the suturing of the tissue with multiple staples 600, the tissue is clamped such that the plane containing the tissue is perpendicular to the Z-axis direction. The staple crown 630 applies pressure to the tissue along the Z-axis direction on the first side, and the first and second staple legs 612 and 622 apply pressure to the tissue along the Z-axis direction on the second side. Figure 8 The diagram shown is a schematic of the first side of the tissue after the anastomosis staple 600 has been formed, combined with... Figure 7 and Figure 8 It can be seen that the projection of the stud crown 630 in the Z-axis direction is the first arc 631, that is, the stud crown 630 applies pressure to the tissue along the Z-axis direction on the first side, and the applied pressure is distributed along the first arc 631. Figure 9 The diagram shown is a schematic of the second side of the tissue after the anastomosis staple 600 has been formed, combined with... Figure 7 and Figure 9It can be seen that the projection M1 of the first stud leg 612 in the Z-axis direction applies pressure to the tissue along the Z-axis direction on the second side. The applied pressure is distributed along projection M1, and the direction of the applied pressure is opposite to the pressure applied by the stud crown 630. The projection M2 of the second stud leg 622 in the Z-axis direction applies pressure to the tissue along the Z-axis direction on the second side. The applied pressure is distributed along projection M2, and the direction of the applied pressure is opposite to the pressure applied by the stud crown 630. In this embodiment, as... Figure 7 As shown, in the forming state, the projection M1 of the first nail leg 612 in the Z-axis direction is tangent to or approximately tangent to the first arc 631, and the projection M2 of the second nail leg 622 in the Z-axis direction is tangent to or approximately tangent to the first arc 631.

[0074] The cross-section of the stud crown 630 is generally circular, and the centerline of the stud crown 630 is the line connecting the centers of the various cross-sections of the stud crown 630. The first arc 631 is specifically the projection of the centerline of the stud crown 630 onto the Z-axis. It is also worth noting that during the transition of the matching stud 600 from the initial state to the formed state, the matching stud 600 undergoes displacement along the Z-axis, but there is generally no deformation or lateral shift. Therefore, the projection of the stud crown 630 onto the Z-axis in the initial state and the projection of the stud crown 630 onto the Z-axis in the formed state are essentially coincident, both being the first arc 631. The first stud leg 612 is generally cylindrical, and its projection M1 onto the Z-axis is specifically the projection of the central axis of the first stud leg 612 onto the Z-axis. The second stud leg 622 is generally cylindrical, and its projection M2 onto the Z-axis is specifically the projection of the central axis of the second stud leg 622 onto the Z-axis. Figure 5 , Figure 7 , Figure 10 and Figure 11 As shown, the first arc 631 has a first endpoint and a second endpoint. The tangent line drawn through the first endpoint to the first arc 631 is the first tangent line 632, and the tangent line drawn through the second endpoint to the first arc 631 is the second tangent line 633.

[0075] The projection M1 of the first nail leg 612 in the Z-axis direction is tangent to the first arc 631, meaning that: Figure 10 As shown, Figure 10 The Z-axis direction is perpendicular to the paper and points inward. The projection M1 of the first pin leg 612 in the Z-axis direction coincides with the first tangent line 632. The projection M1 of the first pin leg 612 in the Z-axis direction is approximately tangent to the first arc 631, meaning that: Figure 11 As shown, Figure 11 The Z-axis direction is perpendicular to the paper and points inward. The angle between the projection M1 of the first pin 612 on the Z-axis and the first tangent 632 is less than 10 degrees. The projection M2 of the second pin 622 on the Z-axis is tangent to the first arc 631, meaning: (e.g., ...) Figure 10 As shown, the projection M2 of the second pin leg 622 in the Z-axis direction coincides with the second tangent line 633; ​​the projection M2 of the second pin leg 622 in the Z-axis direction is approximately tangent to the first arc line 631, meaning that: Figure 12 As shown, the angle between the projection M2 of the second stud leg 622 in the Z-axis direction and the second tangent 633 is less than XX degrees. When the angle between the projection M1 of the first stud leg 621 in the Z-axis direction and the first tangent 632 is less than XX degrees, and the angle between the projection M2 of the second stud leg 622 in the Z-axis direction and the second tangent 633 is less than 10 degrees, the first stud leg 621 / second stud leg 622 can be substantially opposite to the stud crown 630 in the Z-axis direction, resulting in better tissue clamping.

[0076] This arrangement ensures that the pressure distribution path of the first stud leg 612 on the tissue on the second side (projection M1 of the first stud leg 612 in the Z-axis direction) is close to the pressure distribution path of the stud crown 630 on the tissue on the first side (first arc 631). This results in the pressure applied by the first stud leg 612 on the second side being substantially opposite to the pressure applied by the stud crown 630 on the first side, thereby ensuring that the clamped tissue is subjected to pressure on both sides in the Z-axis direction simultaneously, thus improving the tissue clamping effect. Similarly, the pressure distribution path of the second stud leg 622 on the tissue on the second side (projection M2 of the second stud leg 622 in the Z-axis direction) is close to the pressure distribution path of the stud crown 630 on the tissue on the first side (first arc 631). This means that the pressure applied by the second stud leg 622 on the second side is substantially opposite to the pressure applied by the stud crown 630 on the first side, resulting in the clamped tissue being subjected to pressure on both sides in the Z-axis direction simultaneously, thus improving the tissue clamping effect. This allows for a tighter anastomosis of the cut tissue, reducing the likelihood of bleeding or air leakage from the tissue incision. When the anastomotic staple 600 clamps the tissue, the distribution path of the clamping force on both sides of the tissue in the Z-axis direction is roughly the first arc 631. It can be considered that the tissue is clamped by force on both sides in the Z-axis direction along the first arc 631.

[0077] During the operation of the stapler, the tissue is cut into two parts, and each part is sutured by two rows of staples 600. The path of the clamping force exerted by each staple 600 on the tissue is roughly the first arc 631, that is, the path of the clamping force inside the tissue (the first arc 631) is basically the same as the shape arrangement of the staple crowns 630 on the first side of the tissue surface. Figure 2 and Figure 3 As shown, in the staple cartridge body 510, there are two rows of staples 600 on both sides of the tool groove 511. The row of staples 600 closer to the tool groove 511 is the first row, and the row of staples 600 further away from the tool groove 511 is the second row. Figure 2 and Figure 12As shown, Figure 12 The incision in the tissue is located below the anastomosing staples 600 shown in the figure. The staple crowns 630 of the anastomosing staples 600 are arc-shaped, with convex and concave surfaces. The convex surfaces of the first row of anastomosing staples 600 face the cutting groove 511, and the concave surfaces of the second row of anastomosing staples 600 face the cutting groove 511. After suturing the tissue, the first row of anastomosing staples 600 is located between the incision and the second row of anastomosing staples 600. The line connecting any two adjacent staple crowns 630 in the second row and any two adjacent staple crowns 630 in the first row intersects at least one staple crown 630. This means that blood and gas inside the tissue cannot flow from the gap between two adjacent first arcs 631 in the first row, through the gap between two adjacent first arcs 631 in the second row, and then out through the incision. This prevents blood and gas in the incision from freely passing through the incision, further reducing the probability of bleeding and air leakage from the tissue incision.

[0078] Additionally, on the first lateral surface of the tissue, such as Figure 12 As shown, the staple crowns 630 of the two rows of anastomotic staples 600 are arranged to prevent tissue fluid from flowing towards the incision on the first side of the tissue; on the surface of the second side of the tissue, as... Figure 13 As shown, the legs of the two rows of 600-gauge matching staples are arranged in a specific configuration. Figure 13 The incision in the middle of the tissue is located below the anastomosing staples 600 in the figure. The line connecting any two adjacent anastomosing staples 600 in the second row and any two adjacent anastomosing staples 600 in the first row intersects with at least one anastomosing staple 600, preventing tissue fluid from the second side of the tissue from flowing towards the incision. Therefore, in this embodiment, after suturing the tissue, the anastomosing staples 600 can not only reduce the probability of bleeding and air leakage from the tissue incision, but also prevent tissue fluid on the tissue surface from flowing towards the incision.

[0079] Specifically, such as Figures 14 to 15 As shown, the first stapling leg 612 has a first bevel 6122 on the side away from the stapling crown 630, and a first stapling tip 6121 is formed through the first bevel 6122. The second stapling leg 622 has a second bevel 6222 on the side away from the stapling crown 630, and a second stapling tip 6221 is formed through the second bevel 6222. After the first stapling leg 612 pierces the tissue through the first stapling tip 6121, it abuts against the anvil 200. After the second stapling leg 622 pierces the tissue through the second stapling tip 6221, it abuts against the anvil 200, thereby realizing the formation of the anastomosis staple 600 and the suturing of the tissue. When the anastomosis staple 600 is fired, the anastomosis staple 600 moves along the Z-axis towards the tissue and the anvil 200, combining... Figure 15 and Figure 16The first spike tip 6121 pierces the tissue, causing the first spike leg 612 to continue moving through the tissue towards the anvil 200; the second spike tip 6221 pierces the tissue, causing the second spike leg 622 to continue moving through the tissue towards the anvil 200. During the process of the first spike leg 612 abutting against and forming with the anvil 200, the first inclined surface 6122 adheres to the anvil 200 to guide the formation of the first spike leg 612. During the process of the second spike leg 622 abutting against and forming with the anvil 200, the second inclined surface 6222 adheres to the anvil 200 to guide the formation of the second spike leg 622. The adherence of the first inclined surface 6122 to the anvil 200 means that the first inclined surface 6122 is completely adhered to the anvil 200 or partially adhered to the anvil 200, so that the first inclined surface 6122 can better guide the movement of the first spike leg 612, thereby guiding the formation of the first spike leg 612. The second bevel 6222 being in contact with the anvil 200 means that the second bevel 6222 is completely or partially in contact with the anvil 200, allowing the second bevel 6222 to better guide the movement of the second stud leg 622, thereby guiding the formation of the second stud leg 622. After the anastomosis staple 600 is formed, the first stud tip 6121 and the second stud tip 6122 approach the stud crown 630, and the anastomosis staple 600 is roughly B-shaped, thereby closing the anastomosis staple 600 and improving the stability of the anastomosis staple 600 for tissue suturing.

[0080] like Figures 16 to 20 As shown, the anvil 200 has a first path 2211, a first guide wall 2214, a second path 2221, and a second guide wall 2224. The first guide wall 2214 is connected to the first path 2211, and the second guide wall 2224 is connected to the second path 2221. During the process of the staple 600 switching from the initial state to the forming state, the first staple leg 612 is formed along the first path 2211, and the second staple leg 622 is formed along the second path 2221. The specific process of the first inclined surface 6122 fitting with the anvil 200 is as follows: the first inclined surface 6122 first fits with the first guide wall 2214. Due to the cooperation between the first inclined surface 6122 and the first guide wall 2214, it enters the first path 2211 along the first guide wall 2214. At this time, the first inclined surface 6122 fits with the first path 2211 to guide the first staple leg 612 to move within the first path 2211, thereby forming the first staple leg 612. The specific process of the second inclined surface 6222 fitting with the anvil 200 is as follows: The second inclined surface 6222 first fits with the second guide wall 2224. Due to the fit between the second inclined surface 6222 and the second guide wall 2224, the second inclined surface 6222 enters the second path 2221 along the second guide wall 2224. At this time, the second inclined surface 6222 fits with the second path 2221 to guide the second nail leg 622 to move within the second path 2221, thereby shaping the second nail leg 622. For example... Figure 21As shown, the projection of the extension direction of the first path 2211 in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the extension direction of the second path 2221 in the Z-axis direction is tangent or approximately tangent to the first arc 631, such that the projection M1 of the formed first nail leg 612 in the Z-axis direction is tangent to the first arc 631, and the projection M2 of the formed second nail leg 622 in the Z-axis direction is tangent to the first arc 631. The projection of the extension direction of the first path 2211 in the Z-axis direction being tangent to the first arc 631 means that the projection of the extension direction of the first path 2211 in the Z-axis direction coincides with the first tangent line 632; the projection of the extension direction of the first path 2211 in the Z-axis direction being approximately tangent to the first arc 631 means that the angle between the projection of the extension direction of the first path 2211 in the Z-axis direction and the first tangent line 632 is less than 10 degrees. The projection of the extension direction of the second path 2221 onto the Z-axis is tangent to the first arc 631, meaning that the projection of the extension direction of the second path 2221 onto the Z-axis coincides with the second tangent 633. The projection of the extension direction of the second path 2221 onto the Z-axis is substantially tangent to the first arc 631, meaning that the angle between the projection of the extension direction of the second path 2221 onto the Z-axis and the second tangent 633 is less than 10 degrees. Simultaneously, the first inclined surface 6122 guides the first stud leg 612 to move in the same direction as the first path 2211, so that the first stud leg 612 can be formed along the first path 2211. Similarly, the second inclined surface 6222 guides the second stud leg 622 to move in the same direction as the second path 2221, so that the second stud leg 622 can be formed along the second path 2221.

[0081] Among them, such as Figure 14 As shown, the direction of the first inclined surface 6122 from the high side to the low side is the first direction 6125. A straight line parallel to the first direction 6125 is drawn through the first nail tip 6121 to obtain the first straight line 6123. Since the first inclined surface 6122 forms the first nail tip 6121 on the first nail leg 612, the first inclined surface 6122 has a pointed tip, and the first straight line 6123 is the direction in which the pointed tip of the first inclined surface 6122 points. (Combined with...) Figures 17 to 20When the staple 600 is in its initial state, the projection of the first straight line 6123 onto the Z-axis is the first guide line 6124. When the staple 600 is fired and moves along the Z-axis, the first inclined surface 6122 first comes into contact with the first guide wall 2214 of the anvil 200. At this time, the first stud leg 612 is not deformed. The first inclined surface 6122 and the first guide wall 2214 cooperate to guide the first stud leg 612 to move along the direction of the first straight line 6123, so that the first stud leg 612 passes through the first guide wall 2214 and enters the first path 221. The first end 22121 of the first path 2211 is aligned with the first inclined surface 6122, which is in contact with the first end 22121 of the first path 2211. At this time, the first nail leg 612 is partially bent. After the first inclined surface 6122 is in contact with the first end 22121 of the first path 2211, the first inclined surface 6122 is approximately perpendicular to the Z-axis. At this time, the direction of the first guide line 6124 is the direction in which the tip of the first inclined surface 6122 is pointing. The first inclined surface 6122 can guide the first nail leg 612 to move along the direction of the first guide line 6124 by cooperating with the first path 2211. The first guide line 6124 is tangent or approximately tangent to the first arc 631, so that the projection of the first guide line 6124 and the extension direction of the first path 2211 in the Z-axis direction largely coincides, so that the first nail leg 612 can move along the first path 2211 to smoothly form along the first path 2211. Figure 22 As shown, the first guide line 6124 being tangent to the first arc 631 means that the first guide line 6124 coincides with the first tangent line 632; as Figure 23 As shown, the fact that the first guide line 6124 and the first arc 631 are approximately tangent means that the angle between the first guide line 6124 and the first tangent line 632 is less than 10 degrees. During the movement along the first path 2211, the first nail leg 612 is further bent to form the shape.

[0082] Similarly, the direction of the second inclined surface 6222 from the high side to the low side is the second direction 6225. A straight line parallel to the second direction 6225 is drawn through the second nail tip 6221 to obtain the second straight line 6223. Since the second inclined surface 6222 forms the second nail tip 6221 on the second nail leg 622, the second inclined surface 6222 has a sharp point, and the second straight line 6223 is the direction of the sharp point of the second inclined surface 6222. When the staple 600 is in its initial state, the projection of the second straight line 6223 onto the Z-axis is the second guide line 6224. When the staple 600 is fired and moves along the Z-axis, the second inclined surface 6222 first comes into contact with the second guide wall 2224 of the anvil 200. At this time, the second stud leg 622 is not deformed. The second inclined surface 6222 and the second guide wall 2224 cooperate to guide the movement of the second stud leg 622 along the direction of the second straight line 6223, so that the second stud leg 622 passes through the second guide wall 2224 and enters the beginning of the second path 2221. The second inclined surface 6222 is in contact with the beginning of the second path 2221. At this time, the second stud leg 622 is partially bent. After the second inclined plane 6222 is aligned with the first end of the second path 2221, the second inclined plane 6222 is approximately perpendicular to the Z-axis. At this time, the direction of the second guide line 6224 is the direction in which the tip of the second inclined plane 6222 is pointing. The second inclined plane 6222 can guide the second nail leg 622 to move along the direction of the second guide line 6224 by cooperating with the second path 2221. The second guide line 6224 is tangent or approximately tangent to the first arc 631, so that the projections of the extension directions of the second guide line 6224 and the second path 2221 in the Z-axis direction largely coincide, allowing the second nail leg 622 to move along the second path 2221 to smoothly form along the second path 2221. The second guide line 6224 being tangent to the first arc 631 means that the second guide line 6224 coincides with the first tangent line 632; the second guide line 6224 being approximately tangent to the first arc 631 means that the angle between the second guide line 6224 and the second tangent line is less than 10 degrees. During the movement along the second path 2221, the second nail leg 622 is further bent to take shape.

[0083] In a preferred embodiment, the first inclined plane 6122 is generally elliptical in shape, with its apex being its highest point. The first straight line 6123 passes through both the lowest and highest points of the first inclined plane 6122, and the second inclined plane 6222 has the same shape as the first inclined plane 6122. In other embodiments, the first inclined plane 6122 may also be of other shapes, such as triangles or teardrop shapes, and this embodiment does not impose any specific limitations.

[0084] It is also worth noting that the inclination direction (first direction 6125) of the first inclined plane 6122 can be different in different embodiments, as long as the projection of the first straight line 6123 in the Z-axis direction (first guide line 6124) is tangent or approximately tangent to the first arc 631. The angle between the first direction 6125 and the Z-axis is greater than 0° and less than 90°, and not equal to 0° or 90°. In all embodiments, the first direction 6125 ensures that the projection of the first straight line 6123 in the Z-axis direction, i.e., the first guide line 6124, is tangent or approximately tangent to the first arc 631. Similarly, the angle between the second direction 6225 and the Z-axis is also greater than 0° and less than 90°, and not equal to 0° or 90°.

[0085] When the staple 600 is in its initial state, such as Figure 24 As shown, the projection N1 of the first pin leg 612 in the Z-axis direction is tangent or approximately tangent to the first arc 631. The first pin leg 612 is generally a cylinder with a pointed tip. Specifically, the projection N1 of the first pin leg 612 in the Z-axis direction is the projection of the central axis of the first pin leg 612 in the Z-axis direction. During the process of the first pin leg 612 abutting against and forming with the anvil 200, the first pin leg 612 is formed along the direction of the first guide line 6124, and the projection N1 of the first pin leg 612 in the Z-axis direction largely coincides with the first guide line 6124. As can be seen from the above, when the staple 600 is in the forming state, the first stapling leg 612 is inclined along the direction of the first guide line 6124. In the initial state, the first stapling leg 612 is approximately inclined along the direction of the first guide line 6124 (the projection N1 of the first stapling leg 612 in the Z-axis direction). That is, the projections of the first stapling leg 612 in the initial state and the first stapling leg 612 in the forming state largely coincide in the Z-axis direction. During the forming process, the first stapling leg 612 only needs to deform in the Z-axis direction. If the first stapling leg 612 in the initial state and the first stapling leg 612 in the forming state are misaligned in the Z-axis direction, the first stapling leg 612 needs to undergo additional deformation in the horizontal direction during the forming process, increasing the deformation amount during the forming process. Therefore, the fact that the projection N1 of the first stapling leg 612 in the Z-axis direction is tangent or approximately tangent to the first arc 631 can reduce the deformation amount of the first stapling leg 612 during the forming process, making the forming of the first stapling leg 612 easier and increasing the forming probability. When the staple 600 is in the initial state, the projection N2 of the second staple leg 622 in the Z-axis direction is tangent to or approximately tangent to the first arc 631, and the same applies to the first staple leg 612. This setting can reduce the deformation of the second staple leg 622 during the forming process, making the second staple leg 622 easier to form and increasing the forming probability.

[0086] Furthermore, the striking pins 600 in the staple cartridge assembly 500 are fired along the Z-axis direction through the following structure: Figures 25 to 28As shown, the staple cartridge assembly 500 also includes multiple staple pushers 513, which are respectively disposed in multiple staple cavities 512. That is, each staple cavity 512 contains a staple pusher 513 and a staple 600. When the staple 600 is not fired, part of the staple pusher 513 is located in the staple cavity 512 to support the staple 600 located in the staple cavity 512, and the other part is located on the lower side of the staple cavity 512. The length direction of the staple pusher 513 is parallel to the Z-axis direction to ensure that the staple 600 is pushed along the Z-axis direction. The top of the pusher plate 513 is arc-shaped, and the arc is the same as that of the crown 630 of the staple 600, which can match the arc of the inner surface of the staple cavity 512. The top of the pusher plate 513 has an arc-shaped support groove 5131, the arc of which is the same as that of the crown 630. The bottom wall of the arc-shaped support groove 5131 is an arc-shaped wall that is concave downward along the depth direction of the arc-shaped support groove 513. When the arc-shaped support groove 5131 supports the crown 630, the crown 630 can fit against the inner wall of the arc-shaped support groove 5131, providing a better support effect and preventing the staple 600 from shaking relative to the pusher plate 513. The nail pusher 514 includes a rib 5141 and four saddle plates 5142. The rib 5141 is located in the feed groove 511. When the nail pusher 514 moves with the cutting blade assembly 700, the rib 5141 moves forward in the feed groove 511. Four travel grooves 515 are provided on the bottom of the nail cartridge body 510. Each travel groove 515 is opened along the longitudinal direction of the nail cartridge body 510. Each row of travel grooves 515 corresponds to a row of nail cavities 512. Part of the nail pusher 513 is located in the nail cavity 512, and another part is located in the travel groove 515. When the saddle plates 5142 move in the travel groove 515, they can contact the part of the nail pusher 513 located in the travel groove 515 to push the nail pusher 513 to move in the Z-axis direction, thereby realizing the firing of the matching nail 600.

[0087] In this embodiment, the staple cartridge assembly 500, through its cooperation with the anvil seat 200, ensures that after the anastomosis staple 600 is formed, the projection of the first staple leg 612 in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second staple leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc 631. This makes the first staple leg 612 and the second staple leg 622 substantially opposite to the staple crown 630 in the Z-axis direction, improving the clamping effect of the anastomosis staple 600 on the tissue, thereby reducing the probability of bleeding and air leakage from the tissue incision.

[0088] Example 2

[0089] The second embodiment of this application discloses an anvil 200 for use with surgical instruments, the surgical instruments being the thoracic surgical stapler in Embodiment 1. The anvil 200 is used to hold the staple 600 and shape it after the staple 600 is fired.

[0090] In this embodiment, as Figures 1 to 7 , Figure 29 As shown, the anvil 200 is rotatably connected to the staple cartridge 110 and is generally plate-shaped. The anvil 200 includes a molding surface 210 and multiple molding portions 220. The molding surface 210 is one side of the anvil 200 facing the staple cartridge 110. The multiple molding portions 220 are formed by recessing from the molding surface 210 in a direction away from the staple cartridge 110. The molding portions 220 are used to shape the staples 600. The staples 600 are the staples 600 of the staple cartridge assembly 500 in Embodiment 1, including a staple crown 630, a first side staple leg 610 and a second side staple leg 620. The staple crown 630 is arc-shaped. The first side staple leg 610 includes a first staple leg 612 and a first connecting portion 611 connecting the staple crown 630 and the first staple leg 612. The second side staple leg 620 includes a second staple leg 622 and a second connecting portion 621 connecting the staple crown 630 and the second staple leg 622. The forming part 220 includes a first forming part 221 and a second forming part 222. During the forming process of the staple 600, the first forming part 221 forms the first staple leg 612, and the second forming part 222 forms the second staple leg 622, so that the staple 600 is in a formed state. When the staple 600 is in the initial state and the formed state, the projection of the staple crown 630 in the Z-axis direction is a first arc 631. When the staple 600 is in the formed state, the projection of the first staple leg 612 in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second staple leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc 631. This makes the staple 600 better hold the tissue, and the chance of bleeding and air leakage can be reduced when multiple staples 600 are used to suture the tissue.

[0091] The forming direction of the first nail leg 612 is determined by the structure of the first forming part 221, and the forming direction of the second nail leg 622 is determined by the structure of the second forming part 222. For example... Figure 20 and Figure 30 As shown, the first forming part 221 has a first path 2211, and the second forming part 222 has a second path 2221. After the matching nail 600 is fired along the Z-axis, the first nail leg 612 can be formed along the first path 2211, and the second nail leg 622 can be formed along the second path 2221. The process of the first nail leg 612 forming along the first path 2211 is as follows: the first nail tip 6121 moves along the direction of the first path 2211, the first nail leg 612 bends and is accommodated in the first path 2211, and when it reaches the formed state, the first nail leg 612 is still partially accommodated in the first path 2211. Therefore, the extension direction of the first path 2211 determines the forming direction of the first nail leg 612, and similarly, the extension direction of the second path 2221 determines the forming direction of the second nail leg 622.

[0092] In this embodiment, as Figure 21 As shown, the projection of the first path 2211 in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second path 2221 in the Z-axis direction is tangent or approximately tangent to the first arc 631. This ensures that after the first nail leg 612 is formed, its projection in the Z-axis direction is tangent or approximately tangent to the first arc 631; and after the second nail leg 622 is formed, its projection in the Z-axis direction is tangent or approximately tangent to the first arc 631.

[0093] Specifically, such as Figure 31 and Figure 32 As shown, the first molding part 221 includes a first molding bottom surface 2212 and a first limiting wall 2213. A first path 2211 is formed between the first end 22121 and the end 22122 of the first molding bottom surface 2212. The first nail leg 612 moves from the first end 22121 to the end 22122 of the first molding bottom surface 2212 to form along the first path 2211. The first molding bottom surface 2212 is lower than the molding surface 210, so that the molding part 220 is recessed relative to the molding surface 210. The first limiting wall 2213 is disposed on both sides of the first molding bottom surface 2212, specifically on both sides in the width direction of the first molding bottom surface 2212. One end of the first limiting wall 2213 is connected to the first molding bottom surface 2212, and the other end is connected to the molding surface 210. The first molding bottom surface 2212 and the two first limiting walls 2213 form a groove extending along the first path 2211. When the first nail leg 612 is partially located in the groove, the first limiting walls 2213 located on both sides of the first molding bottom surface 2212 in the width direction can limit the first nail leg 612 in the width direction to prevent the first nail leg 612 from shifting in the width direction of the first molding bottom surface 2212, thereby guiding the first nail leg 612 to move along the first path 2211. The second molding part 222 includes a second molding bottom surface 2222 and a second limiting wall 2223, wherein a second path 2221 is formed between the first end and the last end of the second molding bottom surface 2222, and the second nail leg 622 moves from the first end to the last end of the second molding bottom surface 2222 to be molded along the second path 2221. The second limiting wall 2223 is disposed on both sides in the width direction of the second molding bottom surface 2222. One end of the second limiting wall 2223 is connected to the second molding bottom surface 2222, and the other end is connected to the molding surface 210. The second molding bottom surface 2222 and the two second limiting walls 2223 form a groove extending along the second path 2221. Similar to the first molding part 221, the second molding bottom surface 2222 and the two second limiting surfaces can guide the second nail leg 622 to move along the second path 2221.

[0094] Furthermore, the first forming part 221 also includes a first guide wall 2214. One end of the first guide wall 2214 is connected to the beginning end 22121 of the first forming bottom surface 2212, and the other end is connected to the forming surface 210. The first nail leg 612 moves to the beginning end 22121 of the first forming bottom surface 2212 via the guide wall 2214, and then forms along the first path 2211. Since the first nail tip 6121 does not land at a unique point on the first forming part 221 when the matching nail 600 is fired, there is a certain probability that it will deviate from the beginning end 22121 of the first path 2211. The first guide wall 2214 is used to guide the first nail leg 612, whose landing point is deviated from the beginning end 22121 of the first path 2211, to the beginning end 22121 of the first path 2211, so as to better allow the first nail leg 612 with a deviated landing point. In this embodiment, the first guide wall 2214 is disposed on the outer periphery of the first end 22121 of the first molding bottom surface 2212, including an inner side 2216 connected to the first end 22121 of the first molding bottom surface 2212 and an outer side 2215 connected to the molding surface 210. The first end 22121 of the first molding bottom surface 2212 is arc-shaped, so the inner side 2216 is also arc-shaped. The inner diameter of the outer side 2215 is larger than that of the inner side 2216, and the central angle of the outer side 2215 is approximately the same as that of the inner side 2216. The arc-shaped outer side 2215 can significantly increase the area of ​​the first guide wall 2214 on the molding surface 210 compared to other shapes, thereby maximizing the probability of receiving the landing point of the first nail leg 612. Of course, in other embodiments, the shape of the first guide wall 2214 can also be other. In this embodiment, only the example of the first guide wall 2214 having two arc-shaped sides is used for illustration, without specific limitation. The second forming section 222 further includes a second guide wall 2224. One end of the second guide wall 2224 is connected to the first end of the second forming bottom surface 2222, and the other end is connected to the forming surface 210. The second nail leg 622 moves to the first end of the second forming bottom surface 2222 via the guide wall 2224, and then forms along the second path 2221. Similar to the structure of the first guide wall 2214, the second guide wall 2224 is used to guide the second nail leg 622, whose landing point is offset at the first end of the second path 2221, to the first end of the second path 2221 to better accommodate the second nail leg 622 with an offset landing point, thereby enabling the second nail leg 622 to be formed along the second path 2221.

[0095] Furthermore, the width of the first end 22121 of the first path 2211 is greater than the width of the last end 22122 of the first path 2211 and the width of the middle section of the first path 2211. This arrangement makes it easier for the first nail leg 612 to enter the first end 22121 of the first path 2211. Since the width of the first end 22121 of the first path 2211 is greater than the width of the last end 22122, the first limiting wall 2213 extends from the first end 22121 to the last end 22122 of the first path 2211. Therefore, the distance between the two first limiting walls 2213 gradually widens from the last end 22122 to the first end 22121 of the first path 2211. The first limiting wall 2213 has a first edge line 22131 on the molding surface 210. The first edge lines 22131 of the two first limiting walls 2213 are two straight lines that are far apart from each other from the last end 22122 to the first end 22121 of the first path 2211. The outer side 2215 of the first guide wall 2214 is arc-shaped, and the two endpoints of the outer side 2215 are respectively connected to the two first edge lines 22141, making the shape of the first molding part 221 teardrop-shaped. The first forming part 221, which is teardrop-shaped, is wider on one side of the first end 22121 of the first path 2211, so as to better support the first nail leg 612. It is narrower on one side of the last end 22122 of the first path 2211, so as to make the forming of the first nail leg 612 more stable. The structure of the second forming part 222 is the same as that of the first forming part 221, and will not be described again here.

[0096] After the staple 600 is fired, the first tip 6121 of the first stud leg 612 has a certain probability of landing at the beginning 22121 of the first path 2211, and then the first stud leg 612 is formed directly along the first path 2211. The first tip 6121 of the first stud leg 612 has a high probability of landing on the first guide wall 2214. At this time, since the first stud leg 612 has a first inclined surface 6122, the first inclined surface 6122 can fit against the first guide wall 2214. Fitting means that the first inclined surface 6122 and the first guide wall 2214 are completely fitted, or the first inclined surface 6122 and the first guide wall 2214 are partially fitted. The first inclined surface 6122 and the first guide wall 2214 being at least partially fitted can ensure that the first inclined surface 6122 can guide the movement of the first stud leg 612. In this embodiment, the curvature of the first guide wall 2214 is minimized, i.e., the first guide wall 2214 is made as flat as possible, so that the first inclined surface 6122 can fit as closely as possible to the first guide wall 2214 under the deformation of the first stud leg 612, and at the same time, the connection between the first guide wall 2214 and the beginning end 22121 of the first path 2211 is smoother. After the anastomosis staple 600 is fired to the point where the first stud tip 6121 contacts the first guide wall 2214, the first inclined surface 6122 partially fits against the first guide wall 2214; the movement direction of the anastomosis staple 600 is along the Z-axis direction. Since the first guide wall 2214 is an inclined arc-shaped wall, the first guide wall 2214 is inclined towards the beginning end 22121 of the first path 2211, and the first inclined surface 6122 can move along the arc-shaped wall towards the beginning end 22121 of the first path 2211, thereby causing the first stud leg 612 to move in the direction of the first path 2211.

[0097] The first spike leg 612 moves toward the beginning 22121 of the first path 2211 via the first guide wall 2214, until the first inclined surface 6122 is in contact with the beginning 22121 of the first path 2211. Specifically, the beginning 22121 of the first path 2211 is approximately a plane and perpendicular to the Z-axis. When the first spike leg 612 moves to the beginning 22121 of the first path 2211 and separates from the first guide wall 2214, the first spike leg 612 bends so that the first inclined surface 6122 is completely in contact with the first path 2211.

[0098] After the first inclined surface 6122 of the first spike leg 612 is fully engaged with the first path 2211, the first inclined surface 6122 guides the movement of the first spike leg 612, causing the first spike leg 612 to move horizontally along the direction of the first guide line 6124, and the direction of the first guide line 6124 is generally consistent with the extension direction of the first path 2211. If the direction of the first guide line 6124 deviates significantly from the extension direction of the first path 2211, that is, the direction in which the first inclined surface 6122 guides the first nail leg 612 to move is inconsistent with the first path 2211, then the first nail leg 612 will detach from the first path 2211 during its movement along the direction of the first guide line 6124 and abut against the first limiting wall 2213 of the first forming part 221. Under the resistance of the first limiting wall 2213, the first nail leg 612 bends and re-enters the first path 2211 for forming. The projection of the first straight line 6123 of the first nail leg 612 back into the first path 2211 in the Z-axis direction is approximately the same as the extension direction of the first path 2211. During this forming process, the first nail leg 612 undergoes additional bending deformation, affecting the forming effect of the matching nail 600. Therefore, in this embodiment, the setting that the direction of the first guide line 6124 is approximately consistent with the extension direction of the first path 2211 allows the first nail leg 612 to be formed better along the first path 2211.

[0099] Specifically, such as Figures 33 to 34 As shown, the first molding bottom surface 2212 is generally an arc-shaped surface. The first end 22121 of the first molding bottom surface 2212 is the lowest point of the first molding part 221, and the last end 22122 of the first molding bottom surface 2212 is the highest point of the first molding part 221. The first nail tip 6121 moves along the first path 2211. In the horizontal direction, it moves along the first guide line 6124, and in the Z-axis direction, it moves towards the molding surface 210, so that the first side nail leg 612 deforms and becomes arc-shaped.

[0100] like Figures 35 to 36As shown, the first nail tip 6121 moves along the first molding bottom surface 2212, and the first nail leg 612 also partially enters the first path 2211 and fits against the first molding bottom surface 2212. As the molding process proceeds, the first inclined surface 6122 moves to the tail end 22122 of the first path 2211 and disengages from the first path 2211. At this time, the first nail leg 612 is partially located in the first molding part 221, specifically in the groove formed by the first molding bottom surface 2212 and the first limiting wall 2213. The matching nail 600 continues to move along the Z-axis. The first nail leg 612 moves towards the anchor seat 200 and continues to move along the first path 2211 within the first forming part 221. This movement is not guided by the first inclined surface 6122 disengaging from the first path 2211, but rather by the engagement of the first nail leg 612 with the first forming part 221 and the tendency of the first nail leg 612 to move along the Z-axis. The first nail leg 612 continues to move along the first path 2211 until the fired matching nail 600 no longer has the tendency to move along the Z-axis. At this point, the matching nail 600 reaches the forming state.

[0101] The second nail leg 622 is formed in the same way as the first nail leg 612, and will not be described again in this embodiment.

[0102] After the staple 600 is in the formed state, the first staple leg 612 and the second staple leg 622 are closely or substantially closely fitted. Closely fitted means that the first staple leg 612 and the second staple leg 622 have partial contact; substantially fitted means that the distance between the first staple leg 612 and the second staple leg 622 is small, close to a fitted state. This close or substantially fitted fit of the first staple leg 612 and the second staple leg 622 ensures that the distribution path of the force applied to the tissue by the first staple leg 612 is largely connected to the distribution path of the force applied to the tissue by the second staple leg 622, eliminating any gaps between the first staple leg 612 and the second staple leg 622 that are not applying force to the tissue, thereby improving the clamping effect of the staple 600 on the tissue. Furthermore, both the first staple leg 612 and the second staple leg 622 are fitted with the staple crown 630, making the staple approximately B-shaped closed, thus making the suture more stable.

[0103] In this embodiment, both the first forming part 221 and the second forming part 222 are inclined relative to the longitudinal direction of the anvil 200. The angle between the extension direction of the first path 2211 and the longitudinal direction is 10°-40°, and the angle between the extension direction of the second path 2221 and the longitudinal direction is 10°-40°. The specific angle is selected based on the size of the staple crown 630. Within this range, the anastomosis staple 600 provides a better suturing effect on the tissue. Further, in this embodiment, as... Figure 38As shown, the first forming part 221 and the second forming part 222 are spaced apart along the longitudinal direction, that is, the first forming part 221 and the second forming part 222 are not connected, so that the first nail leg 612 will not enter the second forming part 222 when forming along the first forming part 221, thus avoiding problems that affect the forming effect of the first nail leg 612. Of course, in other embodiments, the end of the first path 2211 in the first forming part 221 can also be connected to the end of the second path 2221 in the second forming part 222, and this embodiment does not make specific limitations.

[0104] In addition, in this embodiment, the anvil seat 200 has a spacer groove 211 on the forming surface 210. The anvil seat 200 is divided into two parts by the spacer groove 211. The spacer groove 211 is opposite to the cutting groove 511 of the staple cartridge assembly 500. When the cutting blade moves in the cutting groove 511, part of it moves in the spacer groove 211. The first part and the second part of the anvil seat 200 are respectively provided with two rows of forming parts 220. Each row of forming parts 220 is opposite to each row of staple cavities 512 of the staple cartridge assembly 500, and is used to form the staples 600 fired from the corresponding staple cavity 512. The anvil seat 200 has two rows of molded portions 220 on one side of the spacer groove 211, namely a first row away from the spacer groove 211 and a second row located between the first row and the spacer groove 211. The two rows of molded portions 220 are longitudinally offset, such that the first molded portion 221 of the first row and the second molded portion 222 of the second row are opposite each other in the transverse direction of the anvil seat 200, wherein the first molded portion 221 of the first row and the second molded portion 222 of the second row have the same inclination direction (their extension directions are parallel). The second molded portion 222 of the first row and the first molded portion 221 of the second row are arranged in the transverse direction of the anvil seat 200, and the second molded portion 222 of the first row and the first molded portion 221 of the second row have the same inclination direction (their extension directions are parallel). This allows the molded portions 220 of the first row and the molded portions 220 of the second row to be stacked to save space. Stacking means that any one molded portion 220 of any row partially overlaps with the molded portion 220 of the other row in the longitudinal direction.

[0105] In this embodiment, the anvil can shape the arc-shaped nail so that the projection of the first leg 612 of the shaped arc-shaped nail in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc 631. This allows for a more secure suture of the cut tissue portion, reducing the likelihood of bleeding or air leakage from the tissue incision.

[0106] Example 3

[0107] The third embodiment of this application provides a surgical instrument, which can be a stapler, specifically a stapler used in thoracic surgery. The surgical instrument includes an end effector 100, a cutting blade assembly 700, a shaft assembly 300, and an operating assembly 400. The end effector 100 includes a jaw assembly and a staple cartridge assembly 500. The jaw assembly includes a staple cartridge seat 110 and an anvil seat 200 as in embodiment 2. The anvil seat 200 is rotatably connected to the staple cartridge seat 110. The staple cartridge assembly 500 as in embodiment 1 is installed in the staple cartridge seat 110. When the surgical instruments are in operation, they can be inserted into the patient's chest cavity through the gap between two ribs to cut and suture the tissue to be operated on. After suturing, each anastomotic staple 600 is in a formed state. The projection of the first stapling leg 612 of each anastomotic staple 600 in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second stapling leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc 631, reducing the probability of bleeding and air leakage from the tissue incision.

[0108] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0109] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A staple cartridge assembly for a surgical instrument, the surgical instrument including an end effector, the end effector including a staple cartridge seat and an anvil rotatably connected to the staple cartridge seat; the staple cartridge assembly including a staple cartridge body and a plurality of staples, the staple cartridge body having a plurality of staple cavities, the staples being disposed in the staple cavities, and the staples being propelled out of the staple cavities along the Z-axis direction and moving toward the anvil when fired, the anvil abutting against the staples to shape the staples, characterized in that, The staple includes a crown, a first leg, and a second leg. The crown is arc-shaped, and the projection of the crown in the Z-axis direction is a first arc. When the staple is in the formed state, the projection of the first leg in the Z-axis direction is tangent or approximately tangent to the first arc, and the projection of the second leg in the Z-axis direction is tangent or approximately tangent to the first arc. The first spike leg has a first bevel on the side away from the spike crown, and a first spike tip is formed through the first bevel. The second spike leg has a second bevel on the side away from the spike crown, and a second spike tip is formed through the second bevel. The first inclined surface is inclined along the first direction, and the straight line drawn along the first direction through the first nail tip is the first straight line; when the staple is in the initial state, the projection of the first straight line in the Z-axis direction is the first guide line; during the process of the staple switching from the initial state to the forming state, the first inclined surface fits against the anvil to guide the first nail leg to form along the first guide line, and the first guide line is tangent or approximately tangent to the first arc. The second inclined surface is inclined along the second direction, and the straight line drawn along the second direction through the tip of the second nail is the second straight line; when the staple is in the initial state, the projection of the second straight line in the Z-axis direction is the second guide line. During the process of the staple switching from the initial state to the forming state, the second inclined surface fits against the anvil to guide the second nail leg to form along the second guide line. The second guide line is tangent to or approximately tangent to the first arc.

2. The staple cartridge assembly according to claim 1, characterized in that, When the staple is in the initial state, the projection of the first staple leg in the Z-axis direction is tangent to or approximately tangent to the first arc, and the projection of the second staple leg in the Z-axis direction is tangent to or approximately tangent to the first arc.

3. The staple cartridge assembly according to claim 1, characterized in that, The staple cartridge assembly also includes a staple pusher and a plurality of staple pusher blades, wherein the staple pusher blades are partially located within the staple cavity and support the staples, and in response to the movement of the staple pusher, the staple pusher blades move along the Z-axis to fire the staples.

4. A surgical instrument comprising an operating assembly, a shaft assembly, and a jaw assembly, wherein the proximal end of the shaft assembly is connected to the operating assembly, and the distal end is connected to the jaw assembly, the jaw assembly comprising a staple cartridge seat and an anvil seat rotatably connected to the staple cartridge seat; characterized in that, It also includes the staple cartridge assembly according to any one of claims 1-3, the staple cartridge assembly being detachably mounted on the staple cartridge seat; the operating component is used to drive the rod assembly to move, thereby firing a plurality of the staples of the staple cartridge assembly from the staple cavity opening toward the anvil; the anvil is provided with a plurality of forming portions, the plurality of forming portions corresponding one-to-one with a plurality of staple cavity openings of the staple cartridge assembly, so as to shape the staples fired from the plurality of staple cavity openings.

5. The surgical instrument according to claim 4, characterized in that, Each of the molding portions includes a first molding portion and a second molding portion, the first molding portion having a first path and the second molding portion having a second path; After the staple is fired along the Z-axis, the first staple leg is formed along the first path; the second staple leg is formed along the second path.

6. The surgical instrument according to claim 5, characterized in that, The angle between the first path and the longitudinal direction is 10°-40°, and the angle between the second path and the longitudinal direction is 10°-40°.

7. The surgical instrument according to claim 5, characterized in that, The first forming part includes a first forming bottom surface and a first limiting wall. The first forming bottom surface includes a first path formed between its first end and its last end. The first limiting wall is disposed on both sides of the first forming bottom surface to guide the first pin leg, so that the first pin leg moves along the first path to form the part. The second forming part includes a second forming bottom surface and a second limiting wall. The second forming bottom surface includes a second path formed between its first end and its last end. The second limiting wall is disposed on both sides of the second forming bottom surface to guide the second pin leg, so that the second pin leg moves along the second path to form the part.

8. The surgical instrument according to claim 7, characterized in that, The anvil includes a molding surface, and each of the molding parts is disposed on the molding surface. The first molding part further includes a first guide wall, one end of which is connected to the first end of the first molding bottom surface, and the other end of which is connected to the molding surface. The first pin leg moves to the first end of the first molding bottom surface via the guidance of the first guide wall. The second molding part further includes a second guide wall, one end of which is connected to the first end of the second molding bottom surface, and the other end of which is connected to the molding surface. The second pin leg moves to the first end of the second molding groove via the guidance of the second guide wall.

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