WO2024104196A1 - Staple cartridge assembly for surgical instrument and surgical instrument - Google Patents

Abstract

The present disclosure provides a staple cartridge assembly for a surgical instrument and a surgical instrument. The surgical instrument comprises an end actuator. The end actuator comprises a staple cartridge base and a staple abutting base rotatably connected to the staple cartridge base. The staple cartridge assembly comprises a staple cartridge body and a plurality of staples. The staple cartridge body is provided with a plurality of staple cavities, and the plurality of staples are arranged in the staple cavities. The staples are configured to be, when being fired, pushed out of the staple cavities in the Z-axis direction and move towards the staple abutting base. The staple abutting base is configured to abut against the staples to enable formation of the staples. The staples comprise a staple crown, a first staple leg, and a second staple leg. The staple crown is configured to take an arc shape, and the projection of the staple crown in the Z-axis direction is a first arc. The staples are configured in such a way that when the staples are formed, the projection of the first staple leg in the Z-axis direction is tangent to or substantially tangent to the first arc, and the projection of the second staple leg in the Z-axis direction is tangent to or substantially tangent to the first arc. According to the embodiments of the present invention, the tissue can be pinched better, so that the probability of bleeding and air leakage at the tissue incisions is reduced.

Description

Nail cartridge assembly for surgical instrument and surgical instrument

This application claims priority to Chinese Patent Application No. 202211445314.3 filed on November 18, 2022. The contents of the above-mentioned Chinese patent application disclosure are hereby cited in their entirety as a part of this application.

Technical Field

Embodiments of the present disclosure relate to a staple cartridge assembly for a surgical instrument and a surgical instrument.

Background technique

Surgical cutting staplers are commonly used medical instruments to replace manual suturing. Their main working principle is to use a cutting knife to separate tissues and titanium staples to staple them, similar to a stapler. There are many types of staplers according to their application to different parts of the body. For surgical cutting staplers, their working principle is to enter the patient's body through the cannula of the puncture device that is precisely positioned at the surgical site, and then make a longitudinal incision in the tissue and apply staples on the opposite side of the incision, thereby separating and staple the tissues.

Summary of the invention

The present disclosure aims to provide a staple cartridge assembly and a surgical instrument for a surgical instrument, which can improve the clamping effect of staples on tissues and reduce the probability of bleeding and air leakage in tissue incisions.

The present disclosure is realized through the following technical solutions: a staple cartridge assembly for a surgical instrument, the surgical instrument comprising an end effector, the end effector comprising a staple cartridge seat and a staple anvil seat rotatably connected to the staple cartridge seat; the staple cartridge assembly comprising a staple cartridge body and a plurality of staples, the staple cartridge body being provided with a plurality of staple cavities, the plurality of staples being arranged in the staple cavities, the staples being configured to be pushed out of the staple cavities along a Z-axis direction and move toward the staple anvil seat when fired, the staple anvil seat being configured to abut against the staples to form the staples, the staples comprising a staple crown, a first staple leg and a second staple leg, the staple crown being arranged in an arc shape, the projection of the staple crown in the Z-axis direction being a first arc line; the staples being configured to be in a formed state so that the projection of the first staple leg in the Z-axis direction is tangent to or substantially tangent to the first arc line, and the projection of the second staple leg in the Z-axis direction is tangent to or substantially tangent to the first arc line.

Furthermore, the first nail leg has a first inclined surface on the side away from the nail crown, and a first nail tip is formed by the first inclined surface, and the second nail leg has a second inclined surface on the side away from the nail crown, and a second nail tip is formed by the second inclined surface; the anastomosis staple is configured to make the first inclined surface fit with the nail support to guide the first nail leg to be formed, and make the second inclined surface fit with the nail support to guide the second nail leg to be formed during the process of switching from the initial state to the forming state.

Further, the first inclined surface is inclined along a first direction, and a straight line passing through the first nail tip and drawn along the first direction is a first straight line; when the staple is in the initial state, a projection of the first straight line in the Z-axis direction is a first guide line, and the staple is configured such that, during the process of switching from the initial state to the forming state, the first inclined surface is in contact with the nail support to guide the first nail leg to form along the first guide line, and the first guide line is tangent or substantially tangent to the first arc line;

The second inclined surface is inclined along the second direction, and a straight line passing through the second nail tip and along the second direction is a second straight line; when the staple is in the initial state, the projection of the second straight line in the Z-axis direction is a second guide line, and the staple is configured so that during the process of switching from the initial state to the forming state, the second inclined surface is in contact with the nail support to guide the second nail leg to form along the second guide line, and the second guide line is tangent or approximately tangent to the first arc.

Furthermore, the stapler is configured so that, when in the initial 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.

Furthermore, the staple cartridge assembly also includes a staple pusher and a plurality of staple pusher plates, wherein the staple pusher plates are partially located in the staple cavity and support the staples, and the staple pusher plates are configured to move along the Z-axis direction in response to movement of the staple pusher to fire the staples.

The present disclosure also provides 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, the distal end of the shaft assembly is connected to the jaw assembly, the jaw assembly comprises a staple cartridge seat and a staple anvil seat rotatably connected to the staple cartridge seat; the surgical instrument further comprises the staple cartridge assembly as described above, the staple cartridge assembly being detachably mounted on the staple cartridge seat; the operating assembly is configured to drive the shaft assembly to move, thereby firing a plurality of staples of the staple cartridge assembly to move from the staple cavity opening of the staple cartridge assembly toward the staple anvil seat; the staple anvil The seat is provided with a plurality of forming parts, and the plurality of forming parts correspond one by one to the plurality of nail cavity openings of the nail magazine assembly so as to form the anastomosis staples ejected from the plurality of nail cavity openings.

Further, each of the forming parts includes a first forming part and a second forming part, the first forming part has a first path, and the second forming part has a second path;

The stapler is configured such that after being fired along the Z-axis, the first staple leg is formed along the first path, and the second staple leg is formed along the second path.

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°.

Further, the first molding portion includes a first molding bottom surface and a first limiting wall, the first molding bottom surface includes the first path formed between the head end and the end of the first molding bottom surface, and the first limiting wall is configured to be arranged on both sides of the first molding bottom surface to guide the first nail leg so that the first nail leg moves along the first path to be formed; the second molding portion includes a second molding bottom surface and a second limiting wall, the second molding bottom surface includes the second path formed between the head end and the end of the second molding bottom surface, and the second limiting wall is configured to be arranged on both sides of the second molding bottom surface to guide the second nail leg so that the second nail leg moves along the second path to be formed.

Furthermore, the nail support seat includes a molding surface, and each molding part is arranged on the molding surface. The first molding part also includes a first guide wall, one end of the first guide wall is connected to the head end of the first molding bottom surface, and the other end of the first guide wall is connected to the molding surface, and the first nail leg is configured to move to the head end of the first molding bottom surface via the guidance of the first guide wall; the second molding part also includes a second guide wall, one end of the second guide wall is connected to the head end of the second molding bottom surface, and the other end of the second guide wall is connected to the molding surface, and the second nail leg is configured to move to the head end of the second molding bottom surface via the guidance of the second guide wall.

The beneficial effect of the present disclosure is that after the arc-shaped nail of the nail magazine assembly is formed, the projection of the first nail leg in the Z-axis direction is tangent to the first arc, and the projection of the second nail leg in the Z-axis direction is tangent to the first arc. The first nail leg and the nail crown, and the second nail leg and the nail crown are basically opposite in the Z-axis direction, so that the tissue clamped by the staples is subjected to pressure on both sides of the Z-axis direction at the same time, so that the tissue is clamped better. Therefore, the cut tissue part is sutured more tightly, reducing the probability of bleeding and air leakage at the tissue incision.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a surgical instrument according to at least one embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a staple cartridge assembly according to at least one embodiment of the present disclosure;

FIG. 3 is an exploded view of a staple cartridge assembly according to at least one embodiment of the present disclosure;

FIG4 is a schematic structural diagram of an anastomotic staple according to at least one embodiment of the present disclosure;

FIG5 is a front view of the stapler in at least one embodiment of the present disclosure in an initial state;

FIG6 is a schematic structural diagram of a stapler in at least one embodiment of the present disclosure when the stapler is in a formed state;

7 is a top view of the stapler in at least one embodiment of the present disclosure in a formed state;

8 is a schematic structural diagram of the stapler on the first side of the tissue when the stapler is in a formed state according to at least one embodiment of the present disclosure;

9 is a schematic structural diagram of the stapler on the second side of the tissue when the stapler is in a formed state according to at least one embodiment of the present disclosure;

FIG10 is a schematic diagram showing that the projections of the first staple leg and the second staple leg in the Z-axis direction are tangent to the first arc when the staple is in a formed state;

FIG11 is a schematic diagram showing that when the staple is in a formed state, the projections of the first staple leg and the second staple leg in the Z-axis direction are substantially tangent to the first arc;

12 is a schematic structural diagram of a first side of a tissue when the stapler according to at least one embodiment of the present disclosure is in a formed state;

13 is a schematic structural diagram of the second side of the tissue when the stapler according to at least one embodiment of the present disclosure is in a formed state;

FIG14 is a schematic structural diagram of a stapler in an initial state according to at least one embodiment of the present disclosure;

FIG. 15 is a schematic diagram of a structure in which staples penetrate tissues according to at least one embodiment of the present disclosure;

16 is a schematic diagram of at least one embodiment of the present disclosure showing that the stapler continues to move along the Z-axis direction after penetrating the tissue;

FIG. 17 is a schematic structural diagram of an anastomotic staple close to an anvil according to at least one embodiment of the present disclosure;

FIG18 is a schematic structural diagram of a first guide wire according to at least one embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of a stapler during a molding process according to at least one embodiment of the present disclosure;

FIG. 20 is a schematic structural diagram of a stapler in a formed state according to at least one embodiment of the present disclosure;

21 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 at least one embodiment of the present disclosure;

FIG22 is a schematic diagram of the structure of at least one embodiment of the present disclosure when the first guide line and the second guide line are tangent to the first arc line;

FIG23 is a schematic diagram of the structure of at least one embodiment of the present disclosure when the first guide line and the second guide line are substantially tangent to the first arc line;

24 is a schematic diagram of the positional relationship between the projections of the first nail leg and the second nail leg in the Z-axis direction and the first arc according to at least one embodiment of the present disclosure;

FIG. 25 is a schematic structural diagram of a staple cartridge assembly according to at least one embodiment of the present disclosure;

FIG26 is a schematic structural diagram of a nail pushing sheet according to at least one embodiment of the present disclosure;

FIG27 is a schematic structural diagram of a nail pusher according to at least one embodiment of the present disclosure;

FIG. 28 is a schematic structural diagram of at least one embodiment of the present disclosure when the staples are fired;

FIG29 is a schematic structural diagram of an anvil according to at least one embodiment of the present disclosure;

FIG30 is a schematic structural diagram of a forming portion according to at least one embodiment of the present disclosure;

FIG31 is a schematic structural diagram of a first forming portion according to at least one embodiment of the present disclosure;

32 is a cross-sectional view of a stapler according to at least one embodiment of the present disclosure when it moves toward a forming portion;

33 is a schematic structural diagram of at least one embodiment of the present disclosure when the staples abut against the first guide wall;

34 is a schematic structural diagram of a stapler reaching the head end of a first path according to at least one embodiment of the present disclosure;

35 is a schematic diagram of the positional relationship between the first guide line and the first path when the staples of at least one embodiment of the present disclosure are at the head end of the first path;

FIG36 is a schematic structural diagram of a stapler in at least one embodiment of the present disclosure during a forming process;

FIG. 37 is a schematic structural diagram of a stapler in at least one embodiment of the present disclosure when the stapler is in a formed state; and

FIG38 is a partial schematic diagram of point A in FIG29 .

Reference numerals:
100. end effector; 110. nail magazine seat;
200, anvil; 210, molding surface; 211, spacing groove; 220, molding part; 221, first molding part; 2211, first path; 2212, first molding bottom surface; 22121, head end; 22122, tail end; 2213, first limiting wall; 22141, 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;
300, shaft assembly;
400, operation component;
500, nail magazine assembly; 510, nail magazine body; 511, knife groove; 512, nail cavity; 513, nail pusher; 5131, arc-shaped supporting groove; 514, nail pusher; 5141, convex rib; 5142, riding piece; 515, travel groove; 516, bracket;
600, staple; 610, first side staple leg; 611, first connecting portion; 612, first staple leg;
6121, first nail tip; 6122, first inclined plane; 6123, first straight line; 6124, first guide line; 6125, first direction; 620, second side nail leg; 621, second connecting portion; 622, second nail leg; 6221, second nail tip; 6222, second inclined plane; 6223, second straight line; 6224, second guide line; 6225, second direction; 630, nail crown; 631, first arc line; 632, first tangent line;
700. Cutting knife assembly.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

It should be understood that the terms "proximal (also referred to as the proximal end, the proximal end)" and "distal (also referred to as the distal end, the distal end)" used herein are relative to the clinician who manipulates the handle of the stapler. The term "proximal" refers to the part close to the clinician, and the term "distal" refers to the part away from the clinician. That is, the handle is the proximal side, and the jaw assembly is the distal side. For example, the proximal end of a component refers to the end relatively close to the handle, and the distal end refers to the end relatively close to the jaw assembly. The terms "upper" and "lower" are based on the relative positions of the anvil and the staple magazine seat of the jaw assembly. Specifically, the anvil is at the "upper" and the staple magazine seat is at the "lower". However, the stapler can be used in many directions and positions, so these terms expressing relative positional relationships are not restrictive and absolute.

In the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, movably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements such as abutment. For ordinary technicians, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances. It should be noted that when there is a qualifier before "connected" or "connection", it has the meaning defined by the corresponding qualifier, excluding only the situations that obviously need to be excluded, and does not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, not including integration, but movable connection, etc. are not excluded.

The surgical instrument includes an end effector, which includes a staple cartridge seat and a staple support seat, wherein the staple cartridge seat is used to receive a staple cartridge assembly; the staple cartridge assembly includes a staple cartridge body and staples disposed in the staple cartridge body, wherein a plurality of staple cavities for receiving staples are disposed in the staple cartridge body, and the staple cartridge body includes a top end surface, wherein a staple outlet is provided on the top end surface formed by the staple cavities penetrating the top end surface. Once the doctor determines that the end effector has clamped the target tissue, the surgical cutting stapler can be fired to cut and suture the tissue. During suturing, the top end surface contacts the sutured tissue, and the cutting member in the surgical cutting stapler pushes the wedge-shaped staple pusher block in the staple cartridge to move, thereby causing the staple driver to drive the staples in the staple cartridge to move upward from the staple cavity, pierce and suture the target tissue (i.e., the staples are ejected).

In thoracic surgery, the stapler generally extends the end effector from between two adjacent ribs into the chest cavity to clamp the tissue and cut and suture the tissue. Given the narrow gap between the two ribs, the size of the end effector is made as narrow as possible, and the stapler body is changed from the conventional single-sided three-row staple cavity to a two-row staple cavity to reduce the width of the end effector. The staples in the two rows of staple cavities are arc-shaped staples, but after the arc-shaped staples are formed, the force of the nail crown on the tissue and the force of the bent nail legs on the tissue are staggered, resulting in poor clamping effect of the staples on the tissue, making the tissue incision prone to bleeding, air leakage, etc. Some embodiments of the present disclosure provide a stapler assembly 500 for a surgical instrument, which can be a stapler. As shown in FIGS. 1 to 3 , the surgical instrument includes an end effector 100, a cutting knife assembly 700, a shaft assembly 300, and an operating assembly 400. The end effector 100 includes a jaw assembly and a stapler assembly 500. The jaw assembly includes a stapler seat 110 and an anvil seat 200. The stapler assembly 500 is detachably mounted on the stapler seat 110. The anvil seat 200 is rotatably connected to the stapler seat 110. The jaw assembly has an open state and a closed state. In response to the operation of the operating assembly 400 by medical staff, the sleeve of the shaft assembly 300 moves forward and backward so that the anvil seat 200 can selectively move between the open position and the closed position, so that the jaw assembly switches between the open state and the closed state. When the jaw assembly is in the open state, human tissue can enter the jaw assembly, and when the jaw assembly is in the closed state, the human tissue is clamped. In response to the medical staff's operation of the operating assembly 400, the shaft assembly 300 moves to drive the cutting knife assembly 700 to cut the tissue. The staples 600 in the staple cartridge assembly 500 suture the tissue incision to prevent blood from seeping out of the tissue incision.

The surgical instrument in this embodiment is a stapler used in thoracic surgery. The end actuator 100 generally needs to be inserted into the body through the gap between two ribs. Therefore, the width of the end actuator 100 is relatively narrow, that is, the width of the nail magazine seat 110, the width of the nail support seat 200 and the width of the nail magazine assembly 500 are all relatively narrow. The nail magazine assembly includes a nail magazine body 510 and a bracket 516. The nail magazine body 510 is provided with a knife groove 511 and a nail cavity 512. The knife groove 511 is provided for the movement of the cutting knife assembly 700 and provides guidance for the movement of the cutting knife. The nail cavity 512 is located on the left and right sides of the knife groove 511. In the width direction of the nail magazine assembly 500, multiple nail cavities 512 arranged in the longitudinal direction form a row, and multiple rows of nail cavities 512 are arranged on both sides of the knife groove 511. In this embodiment, the nail cavity 512 body is provided with two rows of nail cavities 512 on both sides of the knife groove 511. Compared with the ordinary nail magazine with three rows of nail cavities 512 on both sides of the knife groove 511, the width of the nail magazine body 510 in this embodiment is narrower, so the width of the nail magazine seat 110 and the nail support seat 200 can also be smaller, so that the width of the end actuator 100 is smaller, and it can be better inserted into the body from the gap between the two ribs, avoiding rib pain caused by the large width of the end actuator 100, facilitating surgical operations, and reducing patient pain.

As shown in FIGS. 2 to 4 , the staple cartridge assembly 500 further includes a plurality of staples 600, which are respectively arranged in a plurality of staple cavities 512 in a one-to-one correspondence, and the staples 600 include a staple crown 630, a first side staple leg 610, and a second side staple leg 620. The cutting knife assembly 700 can move along the cutting groove 511 to cut the tissue. The staple cartridge assembly 500 further includes a staple pusher 514, which is located at the end of the staple cartridge body 510 in the initial position. When the cutting knife assembly 700 moves in the cutting groove 511, it can push the staple pusher 514 to move along the longitudinal direction of the staple cartridge body 510. The moving staple pusher 514 fires the staples 600 in the staple cavity 512, so that the staples 600 are pushed out of the staple cavity 512 along the Z-axis direction (for example, in the process of suturing tissue with a plurality of staples 600, the tissue is The stapler 600 is clamped, and the Z-axis direction is the direction perpendicular to the paper plane and inward), and moves toward the anvil 200, and the staple cartridge assembly 500 cooperates with the anvil 200 to form the staples 600. Specifically, the staples 600 moving toward the anvil 200 pass through the clamped tissue through the first side staple leg 610 and the second side staple leg 620, and abut against the anvil 200, and the anvil 200 bends and deforms the first side staple leg 610 and the second side staple leg 620, so that the staples 600 are in a formed state. Multiple staples 600 are changed from the initial state to the formed state, and the tissue incision cut by the cutting knife assembly 700 is sutured.

As shown in FIG. 5 and FIG. 6 , the first side nail leg 610 includes: a first connecting portion 611 and a first nail leg 612, one end of the first connection part 611 is connected to the nail crown 630, and the other end is connected to the first nail leg 612; the second side nail leg 620 includes a second connection part 621 and a second nail leg 622, one end of the second connection part 621 is connected to the nail crown 630, and the other end is connected to the second nail leg 622. When the staple 600 is in the initial state, the first connection part 611 and the first nail leg 612 are located on the same straight line, and the second connection part 621 and the second nail leg 622 are located on the same straight line. When the staple 600 switches from the initial state to the forming state, the first nail leg 612 passes through the tissue and is bent under the action of the anvil 200; the second nail leg 622 passes through the tissue and is bent under the action of the anvil 200. When the staple 600 is in the forming state, the first connection part 611 is located in the tissue, and the first nail leg 612 is in a bent state; the second connection part 621 is located in the tissue, and the second nail leg 622 is in a bent state.

FIG. 7 shows a top view of the stapler 600 in the formed state. In the formed state, the crown 630 located on one side of the tissue compresses the tissue, and the first leg 612 and the second leg 622 located on the other side of the tissue also compress the tissue, so that the crown 630 applies pressure to the tissue from one side of the tissue, and the first leg 612 and the second leg 622 apply pressure to the tissue from the other side of the tissue to clamp the tissue. In this embodiment, the crown 630 is located on the first side of the tissue, and the first leg 612 and the second leg 622 are located on the second side of the tissue for illustration. In the process of suturing tissues with multiple staples 600, the tissue is clamped so that the plane where the tissue is located is perpendicular to the Z-axis direction, the crown 630 applies pressure to the tissue along the Z-axis direction on the first side, and the first leg 612 and the second leg 622 apply pressure to the tissue along the Z-axis direction on the second side.

FIG8 is a schematic diagram of the first side of the tissue after the stapler 600 is formed. In combination with FIG7 and FIG8 , it can be seen that the projection of the nail crown 630 in the Z-axis direction is a first arc 631, that is, the nail 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; FIG9 is a schematic diagram of the second side of the tissue after the stapler 600 is formed. In combination with FIG7 and FIG9 , it can be seen that the projection M1 of the first nail leg 612 in the Z-axis direction, the first nail leg 612 applies pressure to the tissue along the Z-axis direction on the second side, the applied pressure is distributed along the projection M1, and the direction of the applied pressure is opposite to the pressure applied by the nail crown 630; the projection M2 of the second nail leg 622 in the Z-axis direction, the second nail leg 622 applies pressure to the tissue along the Z-axis direction on the second side, the applied pressure is distributed along the projection M2, and the direction of the applied pressure is opposite to the pressure applied by the nail crown 630.

In this embodiment, as shown in Figure 7, in the formed state, the projection M1 of the first nail leg 612 in the Z-axis direction is tangent 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 or approximately tangent to the first arc 631.

It should be noted that, in the embodiments of the present disclosure, the substantially tangent (or approximately tangent, approximately The tangent) allows a certain error range of tangency, for example, the error range includes ±10 degrees, ±8 degrees, ±5 degrees, etc., and the embodiments of the present disclosure are not limited to this.

For example, the cross-sectional shape of the crown 630 includes a circle. In the embodiment of the present disclosure, the cross-sectional shape of the crown 630 may be a circle or substantially a circle, and the embodiment of the present disclosure is not limited thereto. The center line of the crown 630 is a line connecting the centers of the circles of the cross-sections of the crown 630, and the first arc 631 is specifically a projection of the center line of the crown 630 in the Z-axis direction. It is also worth noting that during the process of switching the staple 600 from the initial state to the formed state, the staple 600 is displaced in the Z-axis direction, and there is no or substantially no deformation and left-right offset. Therefore, the projection of the crown 630 in the Z-axis direction in the initial state and the projection of the crown 630 in the Z-axis direction in the formed state substantially overlap, and both are the first arc 631. The shape of the first nail leg 612 includes a cylindrical shape. In the embodiment of the present disclosure, the shape of the first nail leg 612 can be cylindrical or substantially cylindrical, and the embodiment of the present disclosure is not limited to this. The projection M1 of the first nail leg 612 in the Z-axis direction is specifically the projection of the central axis of the first nail leg 612 in the Z-axis direction. The shape of the second nail leg 622 includes a cylindrical shape. In the embodiment of the present disclosure, the shape of the second nail leg 622 can be cylindrical or substantially cylindrical, and the embodiment of the present disclosure is not limited to this. The projection M2 of the second nail leg 622 in the Z-axis direction is specifically the projection of the central axis of the second nail leg 622 in the Z-axis direction. As shown in combination with Figures 5, 7, 10 and 11, the first arc 631 has a first end point and a second end point. The tangent line of the first arc 631 through the first end point is the first tangent line 632, and the tangent line of the first arc 631 through the second end point is the second tangent line 633.

The projection M1 of the first nail leg 612 in the Z-axis direction is tangent to the first arc 631, which means: as shown in Figure 10, the Z-axis direction in Figure 10 is perpendicular to the paper plane and inward, and the projection M1 of the first nail leg 612 in the Z-axis direction coincides with the first tangent 632; the projection M1 of the first nail leg 612 in the Z-axis direction is substantially tangent to the first arc 631, which means: as shown in Figure 11, the Z-axis direction in Figure 11 is perpendicular to the paper plane and inward, and the angle between the projection M1 of the first nail leg 612 in the Z-axis direction and the first tangent 632 is less than 10 degrees. The projection M2 of the second nail leg 622 in the Z-axis direction is tangent to the first arc 631, which means that: as shown in FIG. 10, the projection M2 of the second nail leg 622 in the Z-axis direction coincides with the second tangent 633; the projection M2 of the second nail leg 622 in the Z-axis direction is substantially tangent to the first arc 631, which means that: as shown in FIG. 12, the angle between the projection M2 of the second nail leg 622 in the Z-axis direction and the second tangent 633 is less than 10 degrees. When the angle between the projection M1 of the first nail leg 612 in the Z-axis direction and the first tangent 632 is less than 10 degrees, and the angle between the projection M2 of the second nail leg 622 in the Z-axis direction and the second tangent 633 is less than 10 degrees, the first nail leg 612/the second nail leg 622 can be aligned with the nail crown 630 in the Z-axis direction. Roughly relative, the effect of clamping the tissue is better.

Such arrangement makes the distribution path of the pressure applied by the first nail leg 612 on the second side to the tissue (the projection M1 of the first nail leg 612 in the Z-axis direction) close to the distribution path of the pressure applied by the nail crown 630 on the first side to the tissue (the first arc 631), so that the pressure applied by the first nail leg 612 on the second side is roughly opposite to the pressure applied by the nail crown 630 on the first side, so that the clamped tissue is subjected to pressure on both sides of the Z-axis direction at the same time, so that the clamping effect of the tissue is better; the distribution path of the pressure applied by the second nail leg 622 on the second side to the tissue (the projection M2 of the second nail leg 622 in the Z-axis direction) is close to the distribution path of the pressure applied by the nail crown 630 on the first side to the tissue (the first arc 631), that is, the pressure applied by the second nail leg 622 on the second side is roughly opposite to the pressure applied by the nail crown 630 on the first side, so that the clamped tissue is subjected to pressure on both sides of the Z-axis direction at the same time, so that the clamping effect of the tissue is better. Therefore, the incised tissue part is more closely anastomosed, reducing the probability of bleeding and air leakage in the tissue incision. When the stapler 600 clamps tissue, the distribution path of the clamping force on both sides of the tissue in the Z-axis direction is substantially the first arc 631 . It can be considered that on the first arc 631 , the tissue is clamped by the force on both sides of the tissue in the Z-axis direction.

During the operation of the stapler, the tissue is cut into two parts, and any part is sutured by two rows of staples 600. The path of the clamping force applied by each staple 600 to the tissue is generally the first arc 631, that is, the path of the clamping force applied to the inside of the tissue (the first arc 631) is generally the same as the outer shape arrangement of the staple crown 630 on the first side of the tissue surface. As shown in FIG2 and FIG3, in the staple cartridge body 510, there are two rows of staples 600 on both sides of the knife groove 511, wherein the row of staples 600 close to the knife groove 511 is the first row, and the row of staples 600 away from the knife groove 511 is the second row. As shown in FIG. 2 and FIG. 12 , the incision of the tissue in FIG. 12 is located at the lower side of the staples 600 in the figure, and the staple crowns 630 of the staples 600 are arc-shaped, with a convex surface and a concave surface. The convex surface of the staples 600 in the first row faces the knife groove 511, and the concave surface of the staples 600 in the second row faces the knife groove 511. After suturing the tissue, the first row of staples 600 is located between the incision and the second row of staples 600. The line connecting the gap between any two adjacent staple crowns 630 in the second row and the gap between any two adjacent staple crowns 630 in the first row intersects with at least one staple crown 630, that is, the blood flow and gas inside the tissue cannot flow from the gap between the two adjacent first arcs 631 in the first row, and then flow out of the incision after passing through the gap between the two adjacent first arcs 631 in the second row, so that the blood and gas in the incision cannot freely pass through the incision, further reducing the probability of bleeding and gas leakage in the tissue incision.

In addition, on the first side surface of the tissue, as shown in FIG. 12 , the nail crowns 630 of the two rows of staples 600 are arranged The staple legs of the two rows of staples 600 are arranged in a row to block the tissue fluid on the first side of the tissue from flowing toward the incision; on the second side surface of the tissue, as shown in FIG. 13 , the staple legs of the two rows of staples 600 are arranged in a row, the incision of the tissue in FIG. 13 is located at the lower side of the staples 600 in the figure, and the line between the gap between any two adjacent staples 600 in the second row and the gap between any two adjacent staples 600 in the first row intersects with at least one staple 600, blocking the tissue fluid on the second side of the tissue from flowing toward the incision. Therefore, after the staples 600 in this embodiment are sutured, the probability of bleeding and air leakage in the tissue incision can be reduced, and the tissue fluid on the tissue surface can be prevented from flowing toward the incision.

Specifically, as shown in FIGS. 14 and 15 , the first nail leg 612 has a first inclined surface 6122 on the side away from the nail crown 630, and a first nail tip 6121 is formed by the first inclined surface 6122. The second nail leg 622 has a second inclined surface 6222 on the side away from the nail crown 630, and a second nail tip 6221 is formed by the second inclined surface 6222. The first nail leg 612 pierces the tissue through the first nail tip 6121 and abuts against the anvil 200, and the second nail leg 622 pierces the tissue through the second nail tip 6221 and abuts against the anvil 200, thereby achieving the formation of the staples 600 and the suturing of the tissue. When the stapler 600 is fired, the stapler 600 moves toward the tissue and the anvil 200 along the Z-axis direction. In conjunction with FIG. 15 and FIG. 16 , the first staple tip 6121 pierces the tissue, causing the first staple leg 612 to penetrate the tissue and continue to move toward the anvil 200; the second staple tip 6221 pierces the tissue, causing the second staple leg 622 to penetrate the tissue and continue to move toward the anvil 200. During the process of the first staple leg 612 being pressed against the anvil 200 and deformed, the first inclined surface 6122 is in contact with the anvil 200 to guide the first staple leg 612 to be formed. During the process of the second staple leg 622 being pressed against the anvil 200 and deformed, the second inclined surface 6222 is in contact with the anvil 200 to guide the second staple leg 622 to be formed. The first inclined surface 6122 is fitted with the anvil 200, which means that the first inclined surface 6122 is completely fitted with the anvil 200 or the first inclined surface 6122 is partially fitted with the anvil 200, so that the first inclined surface 6122 can better guide the movement of the first nail leg 612, thereby guiding the first nail leg 612 to be formed. The second inclined surface 6222 is fitted with the anvil 200, which means that the second inclined surface 6222 is completely fitted with the anvil 200 or the second inclined surface 6222 is partially fitted with the anvil 200, so that the second inclined surface 6222 can better guide the movement of the second nail leg 622, thereby guiding the second nail leg 622 to be formed. After the staple 600 is formed, the first nail tip 6121 and the second nail tip 6122 are close to the nail crown 630, and the staple 600 is generally in a B shape, so that the staple 600 is closed to improve the stability of the staple 600 in suturing tissues.

As shown in FIGS. 16 to 20 , 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. The stapler 600 is switched from the initial state During the process of reaching the forming state, the first nail leg 612 is formed along the first path 2211, and the second nail leg 622 is formed along the second path 2221. The specific process of the first inclined surface 6122 and the anvil 200 being fitted together is as follows: the first inclined surface 6122 is first fitted together with the first guide wall 2214, and then enters the first path 2211 along the first guide wall 2214 due to the cooperation between the first inclined surface 6122 and the first guide wall 2214. At this time, the first inclined surface 6122 is fitted together with the first path 2211 to guide the first nail leg 612 to move in the first path 2211, thereby forming the first nail leg 612. The specific process of the second inclined surface 6222 and the anvil 200 is as follows: the second inclined surface 6222 firstly fits with the second guide wall 2224, and then enters the second path 2221 along the second guide wall 2224 due to the cooperation between the second inclined surface 6222 and 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 in the second path 2221, thereby forming the second nail leg 622. As shown in FIG. 21, the projection of the extension direction of the first path 2211 in the Z-axis direction is tangent to or substantially 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 to or substantially tangent to the first arc 631, so that the projection M1 of the first nail leg 612 in the Z-axis direction after forming is tangent to the first arc 631, and the projection M2 of the second nail leg 622 in the Z-axis direction after forming is tangent to the first arc 631. The projection of the extension direction of the first path 2211 in the Z-axis direction is tangent to the first arc 631, which means that the projection of the extension direction of the first path 2211 in the Z-axis direction coincides with the first tangent 632; the projection of the extension direction of the first path 2211 in the Z-axis direction is substantially tangent to the first arc 631, which 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 632 is less than 10 degrees. The projection of the extension direction of the second path 2221 in the Z-axis direction is tangent to the first arc 631, which means that the projection of the extension direction of the second path 2221 in the Z-axis direction coincides with the second tangent 633; the projection of the extension direction of the second path 2221 in the Z-axis direction is substantially tangent to the first arc 631, which means that the angle between the projection of the extension direction of the second path 2221 in the Z-axis direction and the second tangent 633 is less than 10 degrees. At the same time, the first inclined surface 6122 guides the first nail leg 612 to move in the first path 2211 in the same direction as the direction of the first path 2211, so that the first nail leg 612 can be formed along the first path 2211, and the second inclined surface 6222 guides the second nail leg 622 to move in the second path 2221 in the same direction as the direction of the second path 2221, so that the second nail leg 622 can be formed along the second path 2221.

As shown in FIG. 14 , the direction of the first inclined surface 6122 from the high side to the low side is the first direction 6125, and a straight line parallel to the first direction 6125 is drawn through the first nail tip 6121 to obtain a 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 tip, and the first straight line 6123 is the direction in which the tip of the first inclined surface 6122 faces. In FIG. 20 , when the stapler 600 is in the initial state, the projection of the first straight line 6123 in the Z-axis direction is the first guide line 6124. When the stapler 600 is fired and moves along the Z-axis direction, the first inclined surface 6122 first fits against the first guide wall 2214 of the staple holder 200. At this time, the first staple leg 612 is not deformed. The first inclined surface 6122 cooperates with the first guide wall 2214 to guide the first staple leg 612 to move in the direction of the first straight line 6123, so that the first staple leg 612 passes through the first guide wall 2214 and enters the first path 22 11, and the first inclined surface 6122 is in contact with the first end 22121 of the first path 2211. At this time, the first nail leg 612 has been 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 substantially 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 facing. 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 substantially tangent to the first arc line 631, so that the projections of the first guide line 6124 and the extension direction of the first path 2211 in the Z axis direction substantially coincide, so that the first nail leg 612 can move along the first path 2211 to be smoothly formed along the first path 2211. As shown in Fig. 22, the first guide line 6124 is tangent to the first arc line 631, which means that the first guide line 6124 coincides with the first tangent line 632; as shown in Fig. 23, the first guide line 6124 is substantially tangent to the first arc line 631, which means that the angle between the first guide line 6124 and the first tangent line 632 is less than 10 degrees. In the process of moving along the first path 2211, the first nail leg 612 is further bent to be formed.

Similarly, the direction of the second inclined surface 6222 from the high side toward the low side is the second direction 6225, and a straight line parallel to the second direction 6225 is drawn through the second nail tip 6221 to obtain a second straight line 6223. Since the second inclined surface 6222 forms a second nail tip 6221 on the second nail leg 622, the second inclined surface 6222 has a tip, and the second straight line 6223 is the direction where the tip of the second inclined surface 6222 is located. When the staple 600 is in the initial state, the projection of the second straight line 6223 in the Z-axis direction is the second guide line 6224. When the staple 600 is fired and moves along the Z-axis direction, the second inclined surface 6222 first fits against the second guide wall 2224 of the staple seat 200. At this time, the second nail leg 622 is not deformed, and the second inclined surface 6222 cooperates with the second guide wall 2224 to guide the second nail leg 622 to move along the direction where the second straight line 6223 is located, so that the second nail leg 622 passes through the second guide wall 2224 to move. The second bevel 6222 is inserted into the head end of the second path 2221, and the second bevel 6222 is in contact with the head end of the second path 2221. At this time, the second nail leg 622 has been partially bent. After the second bevel 6222 is in contact with the head end of the second path 2221, the second bevel 6222 is substantially 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 bevel 6222 is facing. The second bevel 6222 can guide the second nail leg 622 along the direction of the second guide line 6224 by cooperating with the second path 2221. The second guide line 6224 is tangent to or substantially tangent to the first arc line 631, so that the projection of the second guide line 6224 and the extension direction of the second path 2221 in the Z-axis direction substantially coincides, so that the second nail leg 622 can move along the second path 2221 to be smoothly formed along the second path 2221. The second guide line 6224 is tangent to the first arc line 631 means that the second guide line 6224 coincides with the first tangent line 632; the second guide line 6224 is substantially tangent to the first arc line 631 means that the angle between the second guide line 6224 and the second tangent line is less than 10 degrees. In the process of moving along the second path 2221, the second nail leg 622 is further bent to be formed.

For example, in one embodiment, the shape of the first inclined surface 6122 includes an ellipse. In the embodiment of the present disclosure, the shape of the first inclined surface can be an ellipse or substantially an ellipse, which is not limited in the embodiment of the present disclosure. The tip of the first inclined surface 6122 is the highest point of the first inclined surface 6122, the first straight line 6123 passes through the lowest point and the highest point of the first inclined surface 6122 at the same time, and the shape of the second inclined surface 6222 is the same as the first inclined surface 6122. In other embodiments, the first inclined surface 6122 can also be other shapes, such as a triangle, a teardrop shape, etc., which is not specifically limited in this embodiment.

It is also worth noting that in different embodiments, the inclination direction (first direction 6125) of the first inclined surface 6122 can be different, as long as the projection of the first straight line 6123 in the Z-axis direction (first guide line 6124) is tangent to or substantially 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 is not equal to 0° or 90°. The first direction 6125 in each embodiment makes the projection of the first straight line 6123 in the Z-axis direction, that is, the first guide line 6124, tangent to or substantially 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 is not equal to 0° or 90°.

When the stapler 600 is in the initial state, as shown in FIG. 24 , the projection N1 of the first staple leg 612 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the shape of the first staple leg 612 includes a cylindrical shape with a pointed tip. In the embodiment of the present disclosure, the shape of the first staple leg can be a cylindrical shape with a pointed tip or substantially a cylindrical shape with a pointed tip, and the embodiment of the present disclosure is not limited thereto; the projection N1 of the first staple leg 612 in the Z-axis direction is specifically the projection of the central axis of the first staple leg 612 in the Z-axis direction. In the process of the first staple leg 612 abutting and forming with the anvil 200, the first staple leg 612 is formed along the direction of the first guide line 6124, and the projection N1 of the first staple leg 612 in the Z-axis direction substantially coincides with the first guide line 6124. As can be seen from the above, when the stapler 600 is in the formed state, the first staple leg 612 is inclined along the direction where the first guide line 6124 is located, and when the stapler 600 is in the initial state, the first staple leg 612 is generally along the direction where the first guide line 6124 is located (the first staple leg 612 in the Z-axis direction is inclined). The projection N1) is tilted, that is, the projection of the first nail leg 612 in the initial state and the first nail leg 612 in the forming state in the Z-axis direction substantially overlap, and during the forming process, the first nail leg 612 only needs to be deformed in the Z-axis direction; if the first nail leg 612 in the initial state and the first nail leg 612 in the forming state are staggered in the Z-axis direction, during the forming process, the first nail leg 612 needs to undergo additional deformation in the horizontal direction, which increases the deformation amount during the forming process. Therefore, the projection N1 of the first nail leg 612 in the Z-axis direction is tangent or substantially tangent to the first arc 631, which can reduce the deformation amount of the first nail leg 612 during the forming process, making it easier for the first nail leg 612 to be formed, and can improve the forming probability. When the stapler 600 is in the initial state, the projection N2 of the second staple leg 622 in the Z-axis direction is tangent or substantially tangent to the first arc 631. Similar to the first staple leg 612, such a setting can reduce the deformation of the second staple leg 622 during the molding process, making the molding of the second staple leg 622 easier and increasing the molding probability.

In addition, the staples 600 in the staple magazine assembly 500 are fired along the Z-axis direction through the following structure: as shown in Figures 25 to 28, the staple magazine assembly 500 also includes a plurality of staple pushing pieces 513, and the plurality of staple pushing pieces 513 are respectively and correspondingly arranged in the plurality of staple cavities 512, that is, each staple cavity 512 is provided with a staple pushing piece 513 and a staple 600. When the staple 600 is not fired, part of the staple pushing piece 513 is located in the staple cavity 512 to support the staple 600 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 pushing piece 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 staple pushing piece 513 is arranged in an arc shape, and the arc is the same as the arc of the nail crown 630 of the staple 600, and can be adapted to the arc of the inner surface of the nail cavity 512; an arc-shaped supporting groove 5131 is provided on the top of the staple pushing piece 513, and the arc of the arc-shaped supporting groove 5131 is the same as the arc of the nail crown 630, and the bottom wall of the arc-shaped supporting groove 5131 is an arc-shaped wall recessed downward along the depth direction of the arc-shaped supporting groove 5131. When the arc-shaped supporting groove 5131 supports the nail crown 630, the nail crown 630 can fit with the inner wall of the arc-shaped supporting groove 5131, providing a better supporting effect, and preventing the staple 600 from shaking relative to the staple pushing piece 513. The nail pusher 514 includes a convex rib 5141 and four riding pieces 5142. The convex rib 5141 is arranged in the knife groove 511. When the nail pusher 514 moves with the cutting knife assembly 700, the convex rib 5141 moves forward in the knife groove 511; four advancing grooves 515 are opened on the bottom of the nail magazine body 510, and each advancing groove 515 is opened along the longitudinal direction of the nail magazine body 510. One row of advancing grooves 515 corresponds to a row of nail cavities 512. A part of the nail pushing piece 513 is located in the nail cavity 512, and the other part is located in the advancing groove 515. When the riding piece 5142 moves in the advancing groove 515, it can contact the part of the nail pushing piece 513 located in the advancing groove 515 to push the nail pushing piece 513 to move in the Z-axis direction, thereby realizing the firing of the anastomosis staple 600.

In this embodiment, the staple cartridge assembly 500 cooperates with the anvil seat 200 to allow the staples 600 to be inserted into the staple cartridge assembly 500. After forming, the projection of the first nail leg 612 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the projection of the second nail leg 622 in the Z-axis direction is tangent or substantially tangent to the first arc 631, so that the first nail leg 612 and the second nail leg 622 are substantially opposite to the nail crown 630 in the Z-axis direction, thereby improving the clamping effect of the anastomosis staple 600 on the tissue, thereby reducing the probability of bleeding and air leakage in the tissue incision.

The present disclosure further provides an anvil 200, which is used for a surgical instrument, wherein the surgical instrument is the stapler for thoracic surgery in the above-mentioned embodiment. The anvil 200 is used to hold the staples 600 and shape the staples 600 after the staples 600 are fired.

In this embodiment, as shown in FIGS. 1 to 7 and 29, the anvil 200 is rotatably connected to the staple cartridge seat 110, and is generally in the shape of a plate. The anvil 200 includes a molding surface 210 and a plurality of molding portions 220. The molding surface 210 is a side surface of the anvil 200 facing the staple cartridge seat 110. The plurality of molding portions 220 are formed by being recessed from the molding surface 210 in a direction away from the staple cartridge seat 110. The molding portions 220 are used to mold the staples 600. The staples 600 are the staples 600 of the staple cartridge assembly 500 in the above-mentioned embodiment, and include a nail crown 630, a first side nail leg 610, and a second side nail leg 620. The nail crown 630 is arc-shaped. The first side nail leg 610 includes a first nail leg 612 and a first connecting portion 611 connected between the nail crown 630 and the first nail leg 612. The second side nail leg 620 includes a second nail leg 622 and a second connecting portion 621 connected between the nail crown 630 and the second nail 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 nail leg 612, and the second forming part 222 forms the second nail leg 622, so that the staple 600 is in a forming state. When the staple 600 is in the initial state and the forming state, the projection of the nail crown 630 in the Z-axis direction is the first arc 631. When the staple 600 is in the forming state, the projection of the first nail leg 612 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the projection of the second nail leg 622 in the Z-axis direction is tangent or substantially tangent to the first arc 631. In this way, the staple 600 has a better clamping effect on the tissue, and the probability of bleeding and air leakage can be reduced when multiple staples 600 are sutured.

The molding direction of the first nail leg 612 is determined by the structure of the first molding portion 221, and the molding direction of the second nail leg 622 is determined by the structure of the second molding portion 222. As shown in FIG. 20 and FIG. 30, the first molding portion 221 has a first path 2211, and the second molding portion 222 has a second path 2221. After the stapler 600 is fired along the Z-axis direction, the first nail leg 612 can be molded along the first path 2211, and the second nail leg 622 can be molded along the second path 2221. The molding process of the first nail leg 612 along the first path 2211 is that the first nail tip 6121 moves along the direction of the first path 2211, the first nail leg 612 is bent and accommodated in the first path 2211, and when the first nail leg 612 reaches the molding state, it is still partially The first nail leg 612 is accommodated in the first path 2211 , so the extending direction of the first path 2211 determines the forming direction of the first nail leg 612 . Similarly, the extending direction of the second path 2221 determines the forming direction of the second nail leg 622 .

In this embodiment, as shown in FIG. 21 , the projection of the first path 2211 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the projection of the second path 2221 in the Z-axis direction is tangent or substantially tangent to the first arc 631. This allows the projection of the first nail leg 612 in the Z-axis direction to be tangent or substantially tangent to the first arc 631 after it is formed; and the projection of the second nail leg 622 in the Z-axis direction to be tangent or substantially tangent to the first arc 631 after it is formed.

Specifically, as shown in FIGS. 31 and 32 , the first molding portion 221 includes a first molding bottom surface 2212 and a first limiting wall 2213, wherein a first path 2211 is formed between the head end 22121 and the tail end 22122 of the first molding bottom surface 2212, and the first nail leg 612 moves from the head end 22121 to the tail end 22122 of the first molding bottom surface 2212 to be molded along the first path 2211. The first molding bottom surface 2212 is lower than the molding surface 210, so that the molding portion 220 is recessed relative to the molding surface 210, and the first limiting wall 2213 is arranged 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, and the first molding bottom surface 2212 and the two first limiting walls 2213 surround 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 deviating 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 portion 222 includes a second molding bottom surface 2222 and a second limiting wall 2223, wherein a second path 2221 is formed between the head end and the tail end of the second molding bottom surface 2222, and the second nail leg 622 moves from the head end to the tail end of the second molding bottom surface 2222 to be molded along the second path 2221. The second limiting walls 2223 are arranged on both sides of the second molding bottom surface 2222 in the width direction. 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 body 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.

Furthermore, the first molding portion 221 further includes a first guide wall 2214, one end of the first guide wall 2214 is connected to the head end 22121 of the first molding bottom surface 2212, and the other end is connected to the molding surface 210, and the first nail leg 612 moves to the head end 22121 of the first molding bottom surface 2212 under the guidance of the first guide wall 2214. The stapler 600 is then formed along the first path 2211. Since the landing point of the first staple tip 6121 on the first forming portion 221 is not unique when the stapler 600 is fired, and there is a certain probability that it is offset from the head end 22121 of the first path 2211, the first guide wall 2214 is used to guide the first staple leg 612 whose landing point is offset from the head end 22121 of the first path 2211 to the head end 22121 of the first path 2211, so as to better allow the first staple leg 612 with an offset landing point. In this embodiment, the first guide wall 2214 is arranged at the periphery of the first end 22121 of the first molding bottom surface 2212, including an inner side edge 2216 connected to the first end 22121 of the first molding bottom surface 2212 and an outer side edge 2215 connected to the molding surface 210. The first end 22121 of the first molding bottom surface 2212 is arranged in an arc shape, so the inner side edge 2216 is also an arc side. The inner diameter of the outer side edge 2215 is greater than the inner side edge 2216. The central angle of the outer side edge 2215 is substantially the same as the central angle of the inner side edge 2216. The outer side edge 2215 is arranged in an arc shape. Compared with other shapes, the area of the first guide wall 2214 on the molding surface 210 can be greatly increased, and the probability of receiving the landing point of the first nail leg 612 can be greatly increased. Of course, in other embodiments, the shape of the first guide wall 2214 can also be other. In this embodiment, only the first guide wall 2214 with both sides of the arc side is used as an example for explanation, and no specific limitation is made. The second molding portion 222 further includes a second guide wall 2224, one end of which is connected to the head end of the second molding bottom surface 2222, and the other end is connected to the molding surface 210. The second nail leg 622 is guided by the second guide wall 2224 to move to the head end of the second molding bottom surface 2222, and then molded along the second path 2221. The second guide wall 2224 has the same structure as the first guide wall 2214, and is used to guide the second nail leg 622 whose landing point is offset from the head end of the second path 2221 to the head end of the second path 2221 to better allow the second nail leg 622 with an offset landing point, thereby enabling the second nail leg 622 to be molded along the second path 2221.

Furthermore, the width of the head end 22121 of the first path 2211 is greater than the width of the tail end 22122 of the first path 2211 and the width of the middle section of the first path 2211, so that the first nail leg 612 can more easily enter the head end 22121 of the first path 2211. Since the width of the head end 22121 of the first path 2211 is greater than the width of the tail end 22122, the first limiting wall 2213 extends from the head end 22121 of the first path 2211 to the tail end 22122 of the first path 2211, so the distance between the two first limiting walls 2213 gradually widens from the tail end 22122 to the head end 22121 of the first path 2211, and the first limiting wall 2213 has a first edge line 22141 on the molding surface 210, and the first edge lines 22141 of the two first limiting walls 2213 are two straight lines that are away from each other from the tail end 22122 to the head end 22121 of the first path 2211. The outer side 2215 of the first guide wall 2214 is arc-shaped, and the two ends of the outer side 2215 are respectively connected to the two first edge lines 22141, so that the first forming part 221 has a teardrop shape. The teardrop-shaped first forming part 221 is wider on the side of the head end 22121 of the first path 2211, which can better receive the first A nail leg 612 is narrower at the end 22122 side of the first path 2211, so that the first nail leg 612 can be formed more stably. The structure of the second forming part 222 is the same as that of the first forming part 221, and will not be repeated here.

After the stapler 600 is fired, the first nail tip 6121 of the first nail leg 612 has a certain probability of falling on the head end 22121 of the first path 2211, and then the first nail leg 612 is directly formed along the first path 2211. The first nail tip 6121 of the first nail leg 612 has a high probability of falling on the first guide wall 2214. At this time, since the first nail leg 612 has a first inclined surface 6122, the first inclined surface 6122 can be fitted with the first guide wall 2214. Fitting means: the first inclined surface 6122 is completely fitted with the first guide wall 2214, or the first inclined surface 6122 is partially fitted with the first guide wall 2214. At least partial fitting of the first inclined surface 6122 with the first guide wall 2214 can ensure that the first inclined surface 6122 can guide the movement of the first nail leg 612. In this embodiment, the curvature of the first guide wall 2214 is as small as possible, that is, the first guide wall 2214 is as flat as possible, so that the first inclined surface 6122 can be as close to the first guide wall 2214 as possible under the action of the deformation of the first nail leg 612, and the connection between the first guide wall 2214 and the head end 22121 of the first path 2211 is smoother. After the staple 600 is fired until the first nail tip 6121 contacts the first guide wall 2214, part of the first inclined surface 6122 is close to the first guide wall 2214; the movement direction of the staple 600 is along the Z-axis direction. Since the first guide wall 2214 is an inclined arc wall, the first guide wall 2214 is inclined toward the head end 22121 of the first path 2211, and the first inclined surface 6122 can move along the arc wall toward the head end 22121 of the first path 2211, thereby causing the first nail leg 612 to move in the direction of the first path 2211.

The first nail leg 612 moves toward the beginning 22121 of the first path 2211 guided by 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 substantially a plane and perpendicular to the Z-axis. When the first nail leg 612 moves to the beginning 22121 of the first path 2211 and separates from the first guide wall 2214, the first nail leg 612 bends to the first inclined surface 6122 and is completely in contact with the first path 2211.

After the first inclined surface 6122 of the first nail leg 612 is completely attached to the first path 2211, the first inclined surface 6122 guides the first nail leg 612 to move, so that the first nail leg 612 moves in the horizontal direction along the direction of the first guide line 6124, and the direction of the first guide line 6124 is substantially consistent with the extension direction of the first path 2211. If the direction of the first guide line 6124 is significantly different 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, the first nail leg 612 will deviate from the first path 2211 during the movement along the first guide line 6124. The first guide line 6124 is arranged along the first path 2211 and abuts against the first limiting wall 2213 of the first forming portion 221. Under the abutting effect of the first limiting wall 2213, the first nail leg 612 is bent and re-enters the first path 2211 for forming. The projection of the first straight line 6123 of the first nail leg 612 that has returned to the first path 2211 in the Z-axis direction is substantially the same as the extension direction of the first path 2211. During the forming process, the first nail leg 612 is additionally bent and deformed, which affects the forming effect of the staple 600. Therefore, the setting of the direction of the first guide line 6124 in this embodiment being substantially consistent with the extension direction of the first path 2211 enables the first nail leg 612 to be better formed along the first path 2211.

Specifically, as shown in FIGS. 33 to 34 , the shape of the first molding bottom surface 2212 includes an arcuate surface. In the embodiment of the present disclosure, the shape of the first molding bottom surface can be an arcuate surface or substantially an arcuate surface, and the embodiment of the present disclosure is not limited thereto. The head end 22121 of the first molding bottom surface 2212 is the lowest point of the first molding portion 221, and the tail end 22122 of the first molding bottom surface 2212 is the highest point of the first molding portion 221. The first nail tip 6121 moves along the first path 2211 in the horizontal direction along the first guide line 6124 and in the Z-axis direction toward the molding surface 210, so that the first nail leg 612 is deformed into an arc shape.

As shown in Figures 35 to 37, 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 with 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 separates from the first path 2211. At this time, the first nail leg 612 is partially located in the first molding portion 221, specifically, in the groove surrounded by the first molding bottom surface 2212 and the first limiting wall 2213. The stapler 600 continues to move toward the staple holder 200 along the Z-axis direction. A nail leg 612 continues to move along the first path 2211 in the first forming portion 221. The movement of this process is not guided by the first inclined surface 6122 that is separated from the first path 2211, but is generated by the cooperation between the first nail leg 612 and the first forming portion 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 staple 600 no longer has the tendency to move along the Z axis. At this time, the staple 600 reaches the formed state, and the formed state of the second nail leg 622 is the same as that of the first nail leg 612, which will not be repeated in this embodiment.

After the stapler 600 is in the formed state, the first staple leg 612 and the second staple leg 622 are in close contact or substantially in close contact. Wherein, close contact means that the first staple leg 612 and the second staple leg 622 are partially in contact, and substantially in close contact means that the distance between the first staple leg 612 and the second staple leg 622 is small, close to the close contact state. The first staple leg 612 and the second staple leg 622 are in close contact or substantially in close contact so that the distribution path of the force applied to the tissue by the first staple leg 612 is substantially connected to the distribution path of the force applied to the tissue by the second staple leg 622, so that There is no gap between the first nail leg 612 and the second nail leg 622 that does not apply force to the tissue, thereby improving the clamping effect of the staple 600 on the tissue. The first nail leg 612 and the second nail leg 622 are both fitted with the nail crown 630, so that the staples are generally closed in a B shape, so that the suture is more stable.

In this embodiment, the first molding part 221 and the second molding part 222 are both 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°, and the angle is specifically selected according to the size of the nail crown 630. Within this range, the stapler 600 has a better suturing effect on the tissue. Further, in this embodiment, as shown in FIG. 38, the first molding part 221 and the second molding part 222 are spaced apart in the longitudinal direction, that is, the first molding part 221 is not connected to the second molding part 222, so that the first nail leg 612 will not enter the second molding part 222 when molding along the first molding part 221, causing the problem of affecting the molding effect of the first nail leg 612. Of course, in other embodiments, the end of the first path 2211 in the first molding part 221 can also be connected to the end of the second path 2221 in the second molding part 222, which is not specifically limited in this embodiment.

In addition, in the present embodiment, a spacing groove 211 is provided on the molding surface 210 of the nail holder 200, and the nail holder 200 is divided into two parts by the spacing groove 211. The spacing groove 211 is opposite to the cutting groove 511 of the nail magazine assembly 500. When the cutting knife moves in the cutting groove 511, part of it moves in the spacing groove 211. The first part and the second part of the nail holder 200 are respectively provided with two rows of molding parts 220, and each row of molding parts 220 is respectively opposite to each row of nail cavities 512 of the nail magazine assembly 500, and is respectively used to mold the anastomosis staples 600 fired from the corresponding nail cavities 512. The two rows of forming parts 220 on one side of the spacing groove 211 of the anvil seat 200 are respectively the first row away from the spacing groove 211 and the second row between the first row and the spacing groove 211. The two rows of forming parts 220 are offset in the longitudinal direction so that the first forming parts 221 of the first row and the second forming parts 222 of the second row are opposite in the transverse direction of the anvil seat 200, wherein the first forming parts 221 of the first row and the second forming parts 222 of the second row have the same inclination direction (the extension directions of the two are parallel). The second forming parts 222 of the first row and the first forming parts 221 of the second row are arranged in the transverse direction of the anvil seat 200, and the second forming parts 222 of the first row and the first forming parts 221 of the second row have the same inclination direction (the extension directions of the two are parallel). The forming parts 220 of the first row and the forming parts 220 of the second row can be stacked to save space. Stacking means that any one forming part 220 of any row partially overlaps with the forming parts 220 of another row in the longitudinal direction.

The anvil in this embodiment can form an arc-shaped nail so that the projection of the first nail leg 612 of the formed arc-shaped nail in the Z-axis direction is tangent to or substantially tangent to the first arc line 631, and the second nail leg 622 The projection in the Z-axis direction is tangent or substantially tangent to the first arc 631. Thus, the incised tissue portion is sutured more tightly, reducing the probability of bleeding and air leakage at the tissue incision.

The present disclosure also provides a surgical instrument, which may be a stapler, specifically a stapler used in thoracic surgery, the surgical instrument comprising an end actuator 100, a cutting knife assembly 700, a shaft assembly 300, and an operating assembly 400, the end actuator 100 comprising a jaw assembly and a staple magazine assembly 500, the jaw assembly comprising a staple magazine seat 110 and a staple anvil seat 200 as in the above embodiment, the staple anvil seat 200 being rotatably connected to the staple magazine seat 110, the staple magazine seat 110 having the staple magazine assembly 500 as in the above embodiment installed therein. When the surgical instrument is working, it can extend 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 stapler 600 is in a formed state, and the projection of the first staple leg 612 of each stapler 600 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the projection of the second staple leg 622 in the Z-axis direction is tangent or substantially tangent to the first arc 631, thereby reducing the probability of bleeding and air leakage from the tissue incision.

It should be understood that although the present disclosure is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the present disclosure is only for the sake of clarity. Those skilled in the art should regard the present disclosure as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the protection scope of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the protection scope of the present disclosure.

Claims (10)

1. A staple cartridge assembly for a surgical instrument, wherein the surgical instrument comprises an end effector, the end effector comprising a staple cartridge seat and an anvil seat rotatably connected to the staple cartridge seat;

   The staple cartridge assembly comprises a staple cartridge body and a plurality of staples, wherein the staple cartridge body is provided with a plurality of staple cavities, and the plurality of staples are arranged in the staple cavities.

   The staple is configured to be pushed out of the staple cavity along the Z-axis direction and move toward the staple seat when fired.

   The anvil is configured to abut against the staple to form the staple.

   The stapler comprises a staple crown, a first staple leg and a second staple leg.

   The nail crown is arranged in an arc shape, and the projection of the nail crown in the Z-axis direction is a first arc line;

   When the staple is configured to be in a formed 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.
2. The nail cartridge assembly according to claim 1, wherein the first nail leg has a first inclined surface on a side away from the nail crown, and is configured to form a first nail tip through the first inclined surface.

   The second nail leg has a second inclined surface on a side away from the nail crown, and is configured to form a second nail tip through the second inclined surface;

   The staple is configured such that during the process of switching from the initial state to the formed state, the first inclined surface is in contact with the staple holder to guide the first staple leg to be formed, and the second inclined surface is in contact with the staple holder to guide the second staple leg to be formed.
3. The nail magazine assembly according to claim 2, wherein the first inclined surface is inclined along a first direction, and a straight line passing through the first nail tip and along the first direction is a first straight line;

   When the stapler is in the initial state, the projection of the first straight line in the Z-axis direction is a first guide line;

   The stapler is configured such that during the process of switching from the initial state to the formed state, the first inclined surface is in contact with the anvil to guide the first staple leg to be formed along the first guide line, and the first guide line is tangent or substantially tangent to the first arc line;

   The second inclined surface is inclined along a second direction, and a straight line passing through the second nail tip and drawn along the second direction is a second straight line;

   When the stapler is in the initial state, the projection of the second straight line in the Z-axis direction is a second guide line;

   The stapler is configured such that during the process of switching from the initial state to the formed state, the second inclined surface is in contact with the staple support to guide the second staple leg to form along the second guide line, and the second guide line is tangent or approximately tangent to the first arc line.
4. The staple cartridge assembly according to claim 3, wherein the staple is configured such that when it is in the initial 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.
5. The nail magazine assembly according to any one of claims 1 to 4, wherein the nail magazine assembly further comprises a nail pusher and a plurality of nail pushing pieces.

   The staple pusher is partially located in the staple cavity and supports the staples.

   The staple pusher is configured to move along the Z-axis direction in response to the movement of the staple pusher to fire the staples.
6. A surgical instrument comprises 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 of the shaft assembly is connected to the jaw assembly.

   The jaw assembly includes a nail magazine seat and a nail anvil seat rotatably connected to the nail magazine seat;

   The surgical instrument further comprises a staple cartridge assembly according to any one of claims 1 to 5, wherein the staple cartridge assembly is detachably mounted on the staple cartridge seat;

   The operating assembly is configured to drive the shaft assembly to move, thereby firing the plurality of staples of the staple cartridge assembly to move from the staple cavity opening of the staple cartridge assembly toward the staple anvil;

   The staple support is provided with a plurality of forming parts, and the plurality of forming parts correspond one by one to the plurality of staple cavity openings of the staple cartridge assembly so as to form the anastomosis staples ejected from the plurality of staple cavity openings.
7. The surgical instrument according to claim 6, wherein each of the moldings comprises a first molding and a second molding, the first molding having a first path, the second molding having a second path;

   The staples are configured such that after being fired along the Z-axis, the first staple legs are formed along the first path, and the second staple legs are formed along the second path.
8. The surgical instrument according to claim 7, wherein the first path is longitudinally The included angle is 10°-40°, and the included angle between the second path and the longitudinal direction is 10°-40°.
9. The surgical instrument according to claim 7 or 8, wherein the first molding portion comprises a first molding bottom surface and a first limiting wall,

   The first molding bottom surface includes the first path formed between a head end and a tail end of the first molding bottom surface,

   The first limiting walls are configured to be disposed on both sides of the first molding bottom surface to guide the first nail legs so that the first nail legs move along the first path to be molded;

   The second molding portion includes a second molding bottom surface and a second limiting wall,

   The second molding bottom surface includes the second path formed between a head end and a tail end of the second molding bottom surface,

   The second limiting walls are configured to be disposed on both sides of the second molding bottom surface to guide the second nail legs so that the second nail legs move along the second path to be molded.
10. The surgical instrument according to claim 9, wherein the anvil includes a molding surface, each of the molding portions is disposed on the molding surface,

    The first molding portion further includes a first guide wall, one end of the first guide wall is connected to the head end of the first molding bottom surface, and the other end of the first guide wall is connected to the molding surface.

    The first nail leg is configured to move to the first end of the first molding bottom surface through the guidance of the first guide wall;

    The second molding portion further includes a second guide wall, one end of the second guide wall is connected to the head end of the second molding bottom surface, and the other end of the second guide wall is connected to the molding surface.

    The second nail leg is configured to move to a head end of the second molding bottom surface through the guidance of the second guide wall.