CN115944339A - Nail abutting seat and surgical instrument - Google Patents

Abstract

The invention discloses a nail abutting seat and a surgical instrument, wherein the nail abutting seat is used for forming anastomotic nails, and comprises a forming surface and a plurality of forming parts of a forming part which are formed by respectively sinking from the forming surface; the forming part comprises a first forming part and a second forming part, the first forming part forms the first nail leg, and the second forming part forms the second nail leg; when the anastomosis nail is in a forming state, the projection of the nail crown in the Z-axis direction is a first arc line; the projection of the first leg in the direction of the Z-axis is tangent or substantially tangent to the first arc and the projection of the second leg in the direction of the Z-axis is tangent or substantially tangent to the first arc. Under the effect of propping up the nail seat, first nail leg and crown, second nail leg and crown coincide basically in the Z axle direction, and the tissue that is held by the anastomotic nail has some both sides in the Z axle direction and all receives pressure, and the effect that the tissue was held is better, and then makes the tissue part of being cut obtain comparatively tight sewing up, has reduced the tissue incision and has taken place the probability of oozing blood, gas leakage.

Description

Nail abutting seat and surgical instrument

Technical Field

The invention relates to the technical field of surgical instruments, in particular to a propping seat and a surgical instrument.

Background

The surgical cutting anastomat is a common medical instrument for replacing manual suture, and the main working principle is to use a cutting knife to break tissue and titanium nails to perform anastomosis on the tissue, which is similar to a stapler. The surgical cutting staplers, which can be divided into several types according to their application to different body parts, work on the principle of entering the patient through the cannula of a puncture instrument positioned precisely at the operation site, making a longitudinal incision in the tissue and applying staples on opposite sides of the incision, thereby severing and stapling the tissue.

The surgical instrument comprises an end effector comprising a staple cartridge seat for receiving a staple cartridge assembly and a staple anvil; the nail bin assembly comprises a nail bin body and anastomotic nails arranged in the nail bin body, a plurality of nail cavities used for containing the anastomotic nails are arranged in the nail bin body, the nail bin body comprises a top end face, and nail outlets formed by the nail cavities penetrating through the top end face are formed in the top end face. Once the surgeon determines that the end effector is gripping the target tissue, the surgical cutting stapler can be fired, thereby severing and stapling the tissue. When suturing, the top end surface is contacted with the tissue to be sutured, a cutting piece in the surgical cutting anastomat pushes a wedge-shaped nail pushing block in a nail bin to move, so that the staples in the nail bin are driven by a staple driver to move upwards from a staple cavity, and the target tissue is punctured and sutured (namely the staples are taken out).

In thoracic surgery, staplers are typically used to grasp and cut and staple tissue by extending an end effector into the chest cavity between two adjacent ribs. In view of the narrow clearance between two ribs, consequently the end effector size is done narrowly as far as possible, among the prior art, change nail storehouse body into two rows of nail chambeies by conventional unilateral three rows of nail chambeies in order to reduce end effector's width, and the anastomotic nail in two rows of nail chambeies chooses for use the arc nail, but the arc nail is after the shaping, and the effort of its nail crown on the tissue staggers each other with the effort of the nail leg of buckling on the tissue, leads to the anastomotic nail to the clamping effect of tissue relatively poor, makes the condition such as oozing blood, gas leakage appear easily in the tissue incision.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the nail abutting seat and the surgical instrument, which can improve the clamping effect of the anastomosis nail on tissues and reduce the probability of blood leakage and air leakage of tissue cuts.

The invention is realized by the following technical scheme: a nail pushing seat is used for forming staples and forming the staples, and comprises a forming surface and forming parts, wherein the forming parts are formed by being sunken from the forming surface respectively; the anastomosis nail comprises a nail crown, a first nail leg and a second nail leg, wherein the first nail leg and the second nail leg are connected with the nail crown; each forming part comprises a first forming part and a second forming part, the first forming part forms the first nail leg, and the second forming part forms the second nail leg so that the anastomotic nail is in a forming state; when the anastomotic nail is in the forming state, the projection of the nail crown in the Z-axis direction is a first arc line; the projection of the first leg in the Z-axis direction is tangent or substantially tangent to the first arc and the projection of the second leg in the Z-axis direction is tangent or substantially tangent to the first arc.

Further, the first molding portion has a first path, and the second molding portion has a second path;

a projection of the first path in the Z-axis direction is tangent or substantially tangent to the first arc line, and a projection of the second path in the Z-axis direction is tangent or substantially tangent to the first arc line; after the anastomosis nail is fired along the Z-axis direction, the first nail leg is formed along the first path; the second staple leg is formed along the second path to place the staple in the formed condition.

Further, the included angle between the first path and the longitudinal direction is 10-40 degrees, and the included angle between the second path and the longitudinal direction is 10-40 degrees.

Further, the first forming portion includes a first forming bottom surface and a first limiting wall, the first forming bottom surface further includes the first path formed between a head end and a tail end of the first forming bottom surface, the first nail leg moves from the head end to the tail end of the first forming bottom surface to be formed along the first path, and the first limiting wall is disposed on two sides of the first forming bottom surface to guide the first nail leg to move along the first path; the second forming part comprises a second forming bottom surface and a second limiting wall, the second forming bottom surface further comprises a second path formed between the head end and the tail end of the second forming bottom surface, the second nail legs move towards the tail end from the head end of the second forming bottom surface to form along the second path, and the second limiting wall is arranged on two sides of the second forming bottom surface to guide the second nail legs to enable the second nail legs to move along the second path.

Further, the first forming portion further comprises a first guide wall, one end of the first guide wall is connected with the head end of the first forming bottom surface, the other end of the first guide wall is connected with the forming surface, and the first nail leg is guided by the first guide wall to move to the head end of the first forming bottom surface; the second forming part further comprises a second guide wall, one end of the second guide wall is connected with the head end of the second forming bottom surface, the other end of the second guide wall is connected with the forming surface, and the second nail leg moves to the head end of the second forming groove through the guide of the second guide wall.

Further, the first guide wall and the second guide wall are both arc-shaped walls.

Further, the first forming portion and the second forming portion are arranged at intervals along the longitudinal direction.

Further, the nail abutting seat comprises a spacing groove, the forming surface is divided into two parts by the spacing groove, and two rows of forming parts are arranged on each part.

The present invention also provides a surgical instrument comprising: an operating assembly, a shaft assembly, a jaw assembly and a cartridge assembly, wherein the shaft assembly is connected with the handle at the proximal end and is connected with the jaw assembly at the distal end, and the jaw assembly comprises a cartridge seat and the nail pushing seat as claimed in any one of claims 1 to 8; the nail bin seat is used for detachably mounting the nail bin assembly, and the nail abutting seat is rotatably connected with the nail bin seat; the handle is used for driving the rod body assembly to move so as to further fire a plurality of staples of the staple cartridge assembly to move from the staple cavity opening to the staple abutting seat; the forming parts of the nail abutting seat correspond to the nail cavity openings of the nail bin assembly one by one, so that anastomotic nails shot from the nail cavity openings are formed, and the anastomotic nails are in a forming state.

Further, the first leg has a first angled surface on a side away from the crown and a first spike is formed by the first angled surface, and the second leg has a second angled surface on a side away from the crown and a second spike is formed by the second angled surface; in the process that the anastomosis nail is switched from the initial state to the forming state, the first inclined surface is attached to the first forming portion to guide the first nail leg to be formed, and the second inclined surface is attached to the second forming portion to guide the second nail leg to be formed.

Furthermore, the first inclined plane inclines along a first direction, and a straight line passing through the first nail tip 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 during the process of switching the staple from the initial state to the forming state, the first inclined surface is attached to the first forming portion to guide the first staple leg to form along the first guide line, and the first guide line is tangent or approximately tangent to the first curved line;

the second inclined plane inclines along a second direction, and a straight line passing through the second nail tip and made along the second direction is a second straight line; when the staple is in the initial state, a projection of the second straight line in the Z-axis direction is a second guide line, and during the process of switching the staple from the initial state to the forming state, the second inclined surface is attached to the second forming portion 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.

Furthermore, the nail bin assembly comprises a nail bin body, a nail pusher, a plurality of anastomotic nails and a plurality of nail pushing sheets, the nail bin body is provided with a plurality of nail cavities, the anastomotic nails are arranged in the nail cavities in a one-to-one correspondence mode, the nail pushing sheets are partially positioned in the nail cavities and support the anastomotic nails, and the nail pushing sheets move in the Z-axis direction to trigger the anastomotic nails in response to the movement of the nail pusher.

Compared with the prior art, the invention has the beneficial effects that: under the effect of propping the nail seat, the projection of first nail leg in Z axle direction is tangent with first pitch arc behind the arc nail shaping of nail storehouse subassembly, and is basically relative in Z axle direction for the tissue by the anastomotic nail centre gripping receives pressure simultaneously in Z axle direction both sides, makes the tissue by the effect of centre gripping better. Therefore, the incised tissue part can be tightly sutured, and the probability of blood leakage and air leakage of the tissue incision is reduced.

Drawings

FIG. 1 is a schematic structural view of a surgical instrument according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a staple cartridge assembly according to a first embodiment of the present invention;

FIG. 3 is an exploded view of the staple cartridge assembly of the first embodiment of the present invention;

FIG. 4 is a schematic structural view of a staple according to a first embodiment of the present invention;

FIG. 5 is a front view of the first embodiment staple of the present invention in an initial condition;

FIG. 6 is a schematic structural view of the first embodiment staple of the present invention in the as-formed condition;

FIG. 7 is a top view of the first embodiment staple of the present invention in a formed condition;

FIG. 8 is a schematic view of the first side of the tissue with the staple of the first embodiment of the present invention in the as-formed condition;

FIG. 9 is a schematic view of the first embodiment of the staple of the present invention in a formed condition, on a second side of the tissue;

FIG. 10 is a schematic view of the projection of the first and second legs in the Z-axis direction being tangent to the first arc when the staple is in the as-formed condition;

FIG. 11 is a schematic view of the first and second legs projecting in a Z-axis direction generally tangent to a first arc when the staple is in a formed condition;

FIG. 12 is a schematic view of the first side of the tissue with the staple of the first embodiment of the present invention in the formed condition;

FIG. 13 is a structural schematic view of the second side of the tissue with the first embodiment of the staple of the present invention in the as-formed condition;

FIG. 14 is a schematic structural view of the first embodiment staple of the present invention in an initial condition;

FIG. 15 is a schematic structural view of the first embodiment of the present invention with the staples penetrating tissue;

FIG. 16 is a schematic view of the first embodiment of the present invention following penetration of the staples through the tissue and continued movement in the Z-axis direction;

FIG. 17 is a schematic view of the staple approaching anvil configuration of the first embodiment of the present invention;

FIG. 18 is a schematic structural view of a first guide wire according to the first embodiment of the present invention;

FIG. 19 is a schematic structural view of the first embodiment staple of the present invention during the forming process;

FIG. 20 is a schematic structural view of the first embodiment staple of the present invention in a formed condition;

FIG. 21 is a schematic diagram showing the projection of the first path and the second path in the Z-axis direction and the position relationship of the first arc line according to the first embodiment of the present invention;

figure 22 is a schematic view of the first and second guide lines of the first embodiment of the present invention shown tangent to the first arc;

figure 23 is a schematic view of the first and second guide lines of the first embodiment of the present invention shown substantially tangent to the first arc;

FIG. 24 is a schematic view of the projection of the first and second legs of the first embodiment of the present invention in the Z-axis direction in relation to the position of the first arc;

FIG. 25 is a schematic structural view of a staple cartridge assembly according to a first embodiment of the present invention;

FIG. 26 is a schematic structural view of the ejector pin sheet according to the first embodiment of the present invention;

FIG. 27 is a schematic structural view of the staple pusher of the first embodiment of the present invention;

FIG. 28 is a schematic structural view of the first embodiment of the staple of the present invention as it is fired;

FIG. 29 is a schematic structural view of a nail anvil according to a second embodiment of the present invention;

FIG. 30 is a schematic structural view of a molding section of a second embodiment of the present invention;

fig. 31 is a schematic structural view of a first molding part according to a second embodiment of the present invention;

fig. 32 is a cross-sectional view of the staple moving toward the profile portion in accordance with the second embodiment of the present invention;

fig. 33 is a schematic structural view of the staples of the second embodiment of the present invention held against the first guide wall;

fig. 34 is a schematic view of the structure of the second embodiment of the staple of the present invention reaching the head end of the first path;

FIG. 35 is a schematic view of a first guide wire in positional relationship with the first path when the staple of the second embodiment of the present invention is at the beginning of the first path;

FIG. 36 is a schematic structural view of a second embodiment staple of the present invention during formation;

FIG. 37 is a schematic structural view of a second embodiment staple of the present invention in a formed condition;

fig. 38 is a partial schematic view at a in fig. 29.

Wherein:

100. an end effector; 110. a nail magazine base; 200. a nail abutting seat; 210. molding surface; 211. a spacing groove; 220. a molding section; 221. a first molding section; 2211. a first path; 2212. a first contoured bottom surface; 22121. a head end; 22122. a tail end; 2213. a first limiting wall; 2214. a first guide wall; 22141. a first edge line; 2215. an outer side edge; 2216. an inner side edge; 222. a second molding section; 2221. a second path; 2222. a second contoured bottom surface; 2223. a second limiting wall; 2224. a second guide wall; 300. a shaft assembly; 400. an operating component; 500. a staple cartridge assembly; 510. a nail bin body; 511. a chute; 512. a staple cavity; 513. a nail pushing sheet; 5131. an arc-shaped bearing groove; 514. a nail pusher; 5141. a rib is protruded; 5142. riding the piece; 515. a nail pushing groove; 516. a bracket; 600. anastomosis nails; 610. a first side nail leg; 611. a first connection portion; 612. a first nail leg; 6121. a first nail tip; 6122. a first inclined plane; 6123. a first straight line; 6124. a first guide wire; 6125. a first direction; 620. a second side nail leg; 621. a second connecting portion; 622. a second nail leg; 6221. a second nail tip; 6222. a second inclined surface; 6223. a second straight line; 6224. a second guide wire; 6225. a second direction; 630. crown nailing; 631. a first arc line; 632. a first tangent line; 700. a cutter assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle of a stapler. The term "proximal" refers to the portion closer to the clinician and the term "distal" refers to the portion further from the clinician. I.e., the handle is proximal and the jaw assembly is distal, e.g., the proximal end of a component is shown relatively close to one end of the handle and the distal end is shown relatively close to one end of the jaw assembly. The terms "upper" and "lower" are used with reference to the relative positions of the staple abutting seat and the magazine seat of the jaw assembly, specifically, the staple abutting seat is "upper" and the magazine seat is "lower". However, staplers can be used in many orientations and positions, and thus these terms of expressing relative positional relationships are not intended to be limiting and absolute.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be understood broadly, and may be, for example, fixedly connected, detachably connected, movably connected, or integrated; either directly or indirectly through intervening media, either internally or in any combination, or in any other relationship or combination. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. It is to be noted that when a definite term is used before "connected" or "connected", it has the meaning defined by the corresponding definite term, only excluding the case where it is obviously necessary to exclude, and not excluding other possible cases, for example, "detachably connected" means detachably connected, not integrally included, but movable connection and the like are not excluded.

Example 1

The present embodiment discloses a cartridge assembly 500 for a surgical instrument, which may be a stapler, as shown in fig. 1-3, the surgical instrument includes an end effector 100, a cutting knife assembly 700, a shaft assembly 300, a handle assembly 400, the end effector 100 includes a jaw assembly including a cartridge seat 110 and a staple abutting seat 200, and a cartridge assembly 500, the cartridge assembly 500 is detachably mounted to the cartridge seat 110. The anvil 200 is rotatably coupled to the cartridge housing 110 and the jaw assembly has an open state and a closed state, and in response to operation of the operating assembly 400 by a medical professional, the cannula of the shaft assembly 300 is moved back and forth such that the anvil 200 can be selectively moved between the open position and the closed position to switch the jaw assembly between the open state and the closed state. When the jaw assembly is in an open state, human tissue can enter the jaw assembly, and when the jaw assembly is in a closed state, the human tissue is clamped. In response to operation of operating assembly 400 by a health care provider, shaft assembly 300 moves to drive cutter assembly 700 forward to cut tissue, and simultaneously fire staples 600 in cartridge assembly 500 to staple the incision of tissue and prevent blood from leaking out of the incision during cutter advancement.

The surgical instrument in this embodiment is a stapler for thoracic surgery, and the end effector 100 generally needs to be inserted into the body from the gap between two ribs, so the width of the end effector 100 is narrow, that is, the width of the staple cartridge seat 110, the width of the staple abutting seat 200 and the width of the staple cartridge assembly 500 are narrow, the staple cartridge assembly includes a staple cartridge body 510 and a bracket 516, the staple cartridge body 510 is provided with a notch 511 and a staple cavity 512, and the notch 511 is used for moving the cutting knife assembly 700 and providing a guide for the movement of the cutting knife. The nail cavities 512 are positioned at the left side and the right side of the knife slot 511, in the width direction of the nail bin assembly 500, the plurality of nail cavities 512 arranged along the longitudinal direction are formed into a row, the two sides of the knife slot 511 are respectively provided with a plurality of rows of nail cavities 512, in this embodiment, the nail cavity 512 body is respectively provided with two rows of nail cavities 512 at the two sides of the knife slot 511, compared with the common nail bin in which three rows of nail cavities 512 are arranged at the two sides of the knife slot 511, the width of the nail bin body 510 in this embodiment is narrower, therefore, the widths of the nail bin base 110 and the nail abutting base 200 can also be smaller, so that the end effector 100 has a smaller width, can be better inserted into the body from the gap between two ribs, rib pain caused by the larger width of the end effector 100 is avoided, the operation is convenient, and the pain of a patient is reduced.

As seen in fig. 2-4, cartridge assembly 500 further includes a plurality of staples 600, the plurality of staples 600 being disposed within the plurality of staple cavities 512 in a one-to-one correspondence, respectively, staples 600 including a crown 630, a first side leg 610 and a second side leg 620. Cutting blade assembly 700 can be moved along the cutting slot 511 to sever tissue. The cartridge module 500 further includes a staple pusher 514, the staple pusher 514 is located at the end of the cartridge body 501 when in the initial position, the cutting knife assembly 700 can push the staple pusher 514 to move along the longitudinal direction of the cartridge body 501 when moving in the knife path 511, the moving staple pusher 514 triggers the staples 600 located in the staple cavities 512, so that the staples 600 are pushed out from the staple cavities 512 along the Z-axis direction and move towards the staple abutting seat 200, the staples 600 are formed by the cooperation of the cartridge module 500 and the staple abutting seat 200, specifically, the staples 600 moving towards the staple abutting seat 200 penetrate through the clamped tissue through the first side staple legs 610 and the second side staple legs 620 and abut against the staple abutting seat 200, and the staple abutting seat 200 bends and deforms the first side staple legs 610 and the second side staple legs 620, so that the staples 600 are in the formed state. The plurality of staples 600 are transformed from an initial state to a formed state, suturing the tissue incision made by cutting knife assembly 700.

As shown in fig. 5 and 6, the first side staple leg 610 includes: a first coupling portion 611 and a first leg 612, first coupling portion 611 being connected at one end to crown 630 and at the other end to first leg 612; second side leg 620 includes a second connecting portion 621 and a second leg 622, second connecting portion 621 connected at one end to crown 630 and at the other end to second leg 622. When the staple 600 is in the initial state, the first connection portion 611 and the first leg 612 are aligned, and the second connection portion 621 and the second leg 622 are aligned. When the staple 600 is switched from the initial state to the forming state, the first staple leg 612 passes through the tissue and is bent under the action of the staple abutting seat 200; the second leg 622 passes through the tissue and is bent under the influence of the anvil 200. When the staple 600 is in the forming state, the first connecting portion 611 is located in the tissue, and the first staple leg 612 is in the bending state; the second connecting portion 621 is located in the tissue, and the second staple leg 622 is in a bent state.

Fig. 7 illustrates a top view of staple 600 in a formed condition. In the as-formed state, crown 630 on one side of the tissue compresses the tissue and first and second legs 612, 622 on the other side of the tissue also compress the tissue such that crown 630 applies pressure to the tissue from one side of the tissue and first and second legs 612, 622 apply pressure to the tissue from the other side of the tissue to clamp the tissue. In this embodiment, crown 630 is illustrated on a first side of the tissue and first leg 612 and second leg 622 are illustrated on a second side of the tissue. During stapling of tissue by plurality of staples 600, the tissue is clamped such that the plane of the tissue is perpendicular to the Z-axis direction, crown 630 applies pressure to the tissue along the Z-axis direction on a first side, and first and second legs 612, 622 apply pressure to the tissue along the Z-axis direction on a second side, fig. 8 shows a schematic view of the first side of the tissue after staple 600 has been formed, and with reference to fig. 7 and 8, it can be seen that the projection of crown 630 in the Z-axis direction is a first arc 631, i.e., 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; fig. 9 is a schematic view of a second side of the tissue after formation of staple 600. Referring to fig. 7 and 9, it can be seen that first leg 612 has a projection M1 in the Z-axis direction, and first leg 612 applies pressure to the tissue in the Z-axis direction on the second side, the applied pressure being distributed along projection M1 and being directed opposite to the pressure applied by crown 630; projection M2 of second leg 622 in the Z-axis direction, and second leg 622 applies pressure to the tissue on a second side in the Z-axis direction, the applied pressure being distributed along projection M2 and being applied in a direction opposite to the pressure applied by crown 630. In this embodiment, as shown in FIG. 7, in the as-molded state, the projection M1 of first leg 612 in the Z-axis direction is tangent or substantially tangent to first arc 631, and the projection M2 of second leg 622 in the Z-axis direction is tangent or substantially tangent to first arc 631.

Where crown 630 is generally circular in cross-section, the centerline of crown 630 is the line joining the centers of the various cross-sections of crown 630, and first arc 631 is specifically the projection of the centerline of crown 630 in the Z-axis direction. It should be noted 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 substantially no deformation or left-right offset, so that the projection of the crown 630 in the Z-axis direction in the initial state substantially coincides with the projection of the crown 630 in the Z-axis direction in the formed state, both of which are the first arc line 631. The first leg 612 is generally cylindrical, and the projection M1 of the first leg 612 in the Z-axis direction is specifically the projection of the central axis of the first leg 612 in the Z-axis direction; second leg 622 is generally cylindrical, and the projection M2 of second leg 622 in the Z-axis direction is specifically the projection of the central axis of second leg 622 in the Z-axis direction. Referring to fig. 5, 7, 10 and 11, the first arc 631 has a first end point and a second end point, the first end point is a first tangent 632 as a tangent of the first arc 631, and the second end point is a second tangent 633 as a tangent of the first arc 631.

The projection M1 of the first leg 612 in the Z-axis direction is tangent to the first arc 631 by: as shown in FIG. 10, the Z-axis direction in FIG. 10 is perpendicular to the paper surface, and the projection M1 of the first leg 612 in the Z-axis direction coincides with the first tangent line 632; the projection M1 of the first leg 612 in the Z-axis direction is substantially tangent to the first arc 631 by: as shown in FIG. 11, the Z-axis direction is perpendicular to the plane of the paper in FIG. 11, and the projection M1 of the first leg 612 in the Z-axis direction forms an angle of less than 10 degrees with the first tangent 632. The projection M2 of the second leg 622 in the Z-axis direction tangent to the first arc 631 means: as shown in fig. 10, a projection M2 of the second staple leg 622 in the Z-axis direction coincides with a second tangent line 633; the projection M2 of the second leg 622 in the Z-axis direction is generally tangent to the first arc 631 by: as shown in fig. 12, the projection M2 of the second staple leg 622 in the Z-axis direction is at an angle less than XX degrees to the second tangent line 633. When the projection M1 of the first leg 621 in the Z-axis direction is less than XX degrees from the first tangent line 632 and the projection M2 of the second leg 622 in the Z-axis direction is less than 10 degrees from the second tangent line 633, the first leg 621/second leg 622 can be substantially opposite to the crown 630 in the Z-axis direction, resulting in better tissue clamping.

The arrangement is such that the path of the distribution of the pressure applied to the tissue by first leg 612 on the second side (projection M1 of first leg 612 in the Z-axis) is closer to the path of the distribution of the pressure applied to the tissue by crown 630 on the first side (first arc 631), such that the pressure applied by first leg 612 on the second side is substantially opposite to the pressure applied by crown 630 on the first side, thereby subjecting the clamped tissue to pressure on both sides in the Z-axis simultaneously, and further providing better clamping of the tissue; the path of the second leg 622 along which the second side applies pressure to the tissue (projection M2 of second leg 622 in the Z-axis) is closer to the path of the crown 630 along which the first side applies pressure to the tissue (first arc 631), i.e., the second leg 622 applies pressure on the second side substantially opposite the crown 630 on the first side, so that the clamped tissue is compressed on both sides of the Z-axis simultaneously, resulting in better tissue clamping. Thereby ensuring that the incised tissue parts are anastomosed more closely and reducing the probability of blood leakage and air leakage of the tissue incision. When the staple 600 is used to clamp tissue, the clamping force applied to the tissue on both sides in the Z-axis direction is distributed along a substantially first arc 631, and it can be considered that the tissue is clamped by the force applied to both sides in the Z-axis direction on the first arc 631.

During operation of the stapler, tissue is cut into two portions, either of which is stapled by two rows of staples 600, and the path of the clamping force applied to the tissue by each staple 600 is generally first arc 631, i.e., the path of the clamping force experienced within the tissue (first arc 631) is substantially the same as the contoured arrangement of crown 630 on the first side of the tissue surface. As shown in fig. 2 and 3, in cartridge body 510, there are two rows of staples 600 on both sides of knife path 511, wherein the staple 600 in one row near knife path 511 is the first row and the staple 600 in one row far from knife path 511 is the second row. As shown in fig. 2 and 12, the cut of the tissue in fig. 12 is located on the underside of staple 600 in the figures, with crown 630 of staple 600 being arcuate with convex and concave surfaces, with the convex surface of staple 600 in the first row facing channel 511 and the concave surface of staple 600 in the second row facing channel 511. After stapling the tissue, the first row of staples 600 is positioned between the incision and the second row of staples 600. The connecting line between the gap between any two adjacent crowns 630 in the second row and the gap between any two adjacent crowns 630 in the first row intersects with at least one crown 630, that is, blood and gas inside the tissue cannot flow from the gap between two adjacent first arcs 631 in the first row, and then flow out from the incision after flowing through the gap between two adjacent first arcs 631 in the second row, so that the blood and gas in the incision cannot freely pass through the incision, and the probability of blood leakage and gas leakage of the tissue incision is further reduced.

In addition, on the surface of the first side of the tissue, as shown in fig. 12, crowns 630 of two rows of staples 600 are arranged in an array to block the tissue on the first side of the tissue from flowing to the incision; on the surface of the second side of the tissue, as shown in fig. 13, the legs of two rows of staples 600 are arranged, the cut of the tissue in fig. 13 is located at the lower side of the staple 600 in the figure, and the connecting 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, so that the tissue fluid on the second side of the tissue is prevented from flowing to the cut. Therefore, the staple 600 in this embodiment can not only reduce the probability of bleeding and air leakage in the tissue incision, but also prevent the tissue fluid on the surface of the tissue from flowing to the incision after suturing the tissue.

Specifically, as seen in FIGS. 14-15, first leg 612 has a first bevel 6122 on the side away from crown 630 and defines a first spike 6121 with first bevel 6122, and second leg 622 has a second bevel 6222 on the side away from crown 630 and defines a second spike 6221 with second bevel 6222. The first leg 612 is engaged with the anvil 200 after piercing through the tissue by the first pointed tip 6121, and the second leg 622 is engaged with the anvil 200 after piercing through the tissue by the second pointed tip 6221, so as to form the staple 600 and suture the tissue. When the staples 600 are fired, the staples 600 move towards the tissue and the staple holder 200 along the Z-axis direction, and with reference to fig. 15 and 16, the first staple points 6121 pierce the tissue, so that the first staple legs 612 continue to move through the tissue towards the staple holder 200; the second staple point 6221 pierces the tissue and causes the second staple leg 622 to continue moving through the tissue toward the anvil 200. In the process that the first nail leg 612 abuts against the nail abutting seat 200 and is deformed and molded, the first inclined surface 6122 abuts against the nail abutting seat 200 to guide the first nail leg 612 to be molded. During the process of pressing and deforming the second nail leg 622 against the nail seat 200, the second inclined face 6222 is attached to the nail seat 200 to guide the second nail leg 622 to be formed. Wherein, the first inclined surface 6122 is attached to the nail seat 200: the first inclined surface 6122 is completely attached to the nail abutting seat 200 or a part of the first inclined surface 6122 is attached to the nail abutting seat 200, so that the first inclined surface 6122 can better guide the movement of the first nail leg 612, and further guide the first nail leg 612 to be formed. The fitting of the second inclined surface 6222 and the nail abutting seat 200 means: the second inclined surface 6222 completely abuts against the nail seat 200 or a part of the second inclined surface 6222 abuts against the nail seat 200, so that the second inclined surface 6222 can better guide the movement of the second nail leg 622, and further guide the formation of the second nail leg 622. After staple 600 is formed, first staple point 6121 and second staple point 6122 are close to crown 630, and staple 600 is approximately in a B shape, so that staple 600 is closed, and the stability of staple 600 in suturing tissues is improved.

As shown in fig. 16 to 20, the nail seat 200 has a first path 2211, a first guide wall 2214, a second path 2221 and a second guide wall 2224, the first guide wall 2214 is connected to the first path 2211, and the second guide wall 2224 is connected to the second path 2221. During switching of staple 600 from the initial condition to the formed condition, first leg 612 is formed along first path 2211 and second leg 622 is formed along second path 2221. The process of attaching the first inclined surface 6122 to the nail seat 200 is that the first inclined surface 6122 is first attached to the first guide wall 2214, and the first inclined surface 6122 is attached to the first path 2211 along the first guide wall 2214 due to the cooperation of the first inclined surface 6122 and the first guide wall 2214, so as to guide the first nail leg 612 to move in the first path 2211, and further to form the first nail leg 612. The process of attaching the second inclined surface 6222 to the staple abutting seat 200 is that the second inclined surface 6222 is first attached to the second guiding wall 2224, and the second inclined surface 6222 is attached to the second path 2221 along the second guiding wall 2224 due to the engagement between the second inclined surface 6222 and the second guiding wall 2224, so as to guide the second staple leg 622 to move in the second path 2221, thereby forming the second staple leg 622. 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, such that the projection M1 of the first molded leg 612 in the Z-axis direction is tangent to the first arc 631, and the projection M2 of the second molded leg 622 in the Z-axis direction is tangent to the first arc 631. The projection of the extending direction of the first path 2211 in the Z-axis direction is tangent to the first arc 631, which means that: a projection of the extending direction of the first path 2211 in the Z-axis direction coincides with the first tangent 632; the projection of the extending direction of first path 2211 in the Z-axis direction is substantially tangent to first arc 631, which means that: the projection of the extending direction of the first path 2211 in the Z-axis direction forms an angle smaller than 10 degrees with the first tangent 632. The projection of the extending direction of second path 2221 in the Z-axis direction is tangent to first arc 631, meaning that: a projection of the extending direction of the second path 2221 in the Z-axis direction coincides with the second tangent line 633; the projection of the extending direction of second path 2221 in the Z-axis direction substantially tangent to first arc 631 means that: an angle between a projection of the extending direction of the second path 2221 in the Z-axis direction and the second tangent line 633 is less than 10 degrees. At the same time, the first ramp 6122 directs the first staple leg 612 to move in the same direction within first path 2211 as the first path 2211 is in, so that the first staple leg 612 can be formed along first path 2211, and the second ramp 6222 directs the second staple leg 622 to move in the same direction within second path 2221 as the second path 2221 is in, so that the second staple leg 622 can be formed along second path 2221.

As shown in fig. 14, a direction of the first inclined surface 6122 from the high side to the low side is a first direction 6125, and the first nail tip 6121 makes a straight line parallel to the first direction 6125 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 toward which the tip of the first inclined surface 6122 faces. With reference to fig. 17 to 20, when the staple 600 is in an initial state, a projection of the first straight line 6123 in the Z-axis direction is a first guide line 6124, when the staple 600 is fired and moves along the Z-axis direction, the first inclined surface 6122 first abuts against the first guide wall 2214 of the staple abutting seat 200, at this time, the first staple leg 612 is not deformed, the first inclined surface 6122 cooperates with the first guide wall 2214, the first staple leg 612 is guided to move along the direction of the first straight line 6123, so that the first staple leg 612 enters the head end 22121 of the first path 2211 through the first guide wall 2214, the first inclined surface 6122 abuts against the head end 22121 of the first path 2211, at this time, the first staple leg 612 is partially bent, after the first inclined surface 6122 abuts against the head 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 faces, and the first path 2211 can guide line move along the direction of the first guide line 2211. The first guide line 6124 is tangent or substantially tangent to first arc 631 such that the first guide line 6124 is generally coincident with the projection of the direction of extension of first path 2211 in the Z-axis direction, enabling first staple leg 612 to move along first path 2211 to successfully form along first path 2211. As shown in fig. 22, the tangency of the first guide line 6124 with the first arc 631 means that: the first guide line 6124 coincides with the first tangent 632; as shown in fig. 23, the first guide line 6124 being substantially tangent to the first arc 631 means that: the angle between the first guiding line 6124 and the first tangent 632 is less than 10 degrees. During movement along first path 2211, first leg 612 is bent further to shape.

Similarly, the direction from the high side to the low side of the second inclined surface 6222 is the second direction 6225, and the second nail tip 6221 makes a straight line parallel to the second direction 6225 to obtain a second straight line 6223. Since the second angled face 6222 forms the second staple point 6221 on the second staple leg 622, the second angled face 6222 has a pointed end, and the second straight line 6223 is the direction in which the pointed end of the second angled face 6222 is located. When the staples 600 are 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 staples 600 are fired and move in the Z-axis direction, the second inclined surface 6222 first abuts against the second guide wall 2224 of the staple abutment 200, when the second staple leg 622 is undeformed, the second inclined surface 6222 engages with the second guide wall 2224, the second staple leg 622 is guided in the direction in which the second straight line 6223 is located, so that the second staple leg 622 enters the head end of the second path 2221 through the second guide wall 2224, and the second inclined surface 6222 abuts against the head end of the second path 2221, when the second staple leg 622 is partially bent, after the second inclined surface 6222 abuts against the head end of the second path 2221, the second inclined surface 6222 is substantially perpendicular to the Z-axis, when the direction of the second inclined surface 6224 is the direction in which the tip of the second guide line 6222 faces, the second inclined surface 6222 can guide the second staple leg 6224 can be guided along the direction of the second guide line 6224 by the second path 222621, when the second inclined surface 6222 engages with the second path 2221, the second staple leg 622, the projection of the second straight line 24 is substantially tangential to the second guide line 24, so that the projection of the second staple leg 24 extends along the direction of the second guide line 621, and the second staple leg 24 is substantially tangential to the direction, and the second guide line 22224 extends along the direction, and the second path 22224. The tangency of the second guide line 6224 to the first arc 631 means: the second guide line 6224 coincides with the first tangent 632; the second guide line 6224 is generally tangent to the first arc 631 by: the angle between the second guide line 6224 and the second tangent line is less than 10 degrees. During movement along second path 2221, second leg 622 is bent further to shape.

In a preferred embodiment, the first inclined surface 6122 is substantially elliptical, 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, and the second inclined surface 6222 has the same shape as the first inclined surface 6122. In other embodiments, the first inclined surface 6122 may also have other shapes, such as a triangle shape, a drop shape, etc., and this embodiment is not limited in particular.

It should be noted that, in different embodiments, the inclination direction (the first direction 6125) of the first inclined surface 6122 may be different, and only the projection (the first guide line 6124) of the first straight line 6123 in the Z-axis direction needs to be tangent or substantially tangent to the first arc line 631. The first direction 6125 is at an angle greater than 0 ° and less than 90 ° and not equal to 0 ° or 90 ° to the Z-axis, and the first direction 6125 in various embodiments is such that the projection of the first line 6123 in the Z-axis direction, i.e., the first guide line 6124 is tangent or substantially tangent to the first arc 631. Similarly, the second direction 6225 also includes an angle greater than 0 ° and less than 90 ° with respect to the Z-axis, and is not equal to 0 ° or 90 °.

In the initial state of staple 600, as shown in fig. 24, a projection N1 of first leg 612 in the Z-axis direction is tangent or substantially tangent to first arc 631, first leg 612 is generally cylindrical with a pointed end, and projection N1 of first leg 612 in the Z-axis direction is specifically a projection of a central axis of first leg 612 in the Z-axis direction. In the process of abutting and forming the first nail leg 612 with the nail abutting seat 200, the first nail leg 612 is formed along the first guide line 6124, and a projection N1 of the first nail leg 612 in the Z-axis direction substantially coincides with the first guide line 6124. As can be seen from the above, in the formed state of the staple 600, the first leg 612 is inclined along the direction of the first guide line 6124, while in the initial state of the staple 600, the first leg 612 is inclined substantially along the direction of the first guide line 6124 (the projection N1 of the first leg 612 in the Z-axis direction), that is, the projection of the first leg 612 in the Z-axis direction in the initial state substantially coincides with the projection of the first leg 612 in the formed state, and during the forming process, the first leg 612 only needs to be deformed in the Z-axis direction; if the first leg 612 in the initial state is offset from the first leg 612 in the forming state in the Z-axis direction, the first leg 612 needs to be deformed in the horizontal direction during the forming process, which increases the amount of deformation during the forming process. Therefore, the projection N1 of the first leg 612 in the Z-axis is tangent or substantially tangent to the first arc 631 to reduce the amount of deformation of the first leg 612 during forming, making forming of the first leg 612 easier and increasing the likelihood of forming. When staple 600 is in the initial state, projection N2 of second staple leg 622 in the Z-axis direction is tangent or approximately tangent to first arc 631, and in the same way as first staple leg 612, such an arrangement can reduce the amount of deformation of second staple leg 622 during the forming process, so that second staple leg 622 is formed more easily, and the forming probability can be improved.

In addition, the firing of the staples 600 in the cartridge assembly 500 along the Z-axis is achieved by: as shown in fig. 25 to 28, the cartridge module 500 further includes a plurality of staple pushing sheets 513, the plurality of staple pushing sheets 513 are respectively disposed in the plurality of staple cavities 512 in a one-to-one correspondence manner, that is, one staple pushing sheet 513 and one staple 600 are disposed in each staple cavity 512, when the staple 600 is not fired, a portion of the staple pushing sheet 513 is located in the staple cavity 512 and supports the staple 600 located in the staple cavity 512, another portion of the staple pushing sheet 513 is located at a lower side of the staple cavity 512, and a length direction of the staple pushing sheet 513 is parallel to the Z-axis direction, so as to ensure that the staple 600 is pushed along the Z-axis direction. The top of the nail pushing sheet 513 is arc-shaped, and the radian of the nail pushing sheet is the same as that of the crown 630 of the anastomosis nail 600 and can be matched with that of the inner surface of the nail cavity 512; arc bearing groove 5131 has been seted up at the top of ejector pad 513, and arc bearing groove 5131's radian is the same with the radian of crown 630, and arc bearing groove 5131's diapire is for following arc bearing groove 513 depth direction undercut's arc wall, and during arc bearing groove 5131 bearing crown 630, crown 630 can be laminated with arc bearing groove 5131's inner wall, provides better bearing effect, avoids anastomotic nail 600 to rock for ejector pad 513. The nail pusher 514 comprises a convex rib 5141 and four riding pieces 5142, the convex rib 5141 is arranged in the cutter slot 511, and the convex rib 5141 advances in the cutter slot 511 when the nail pusher 514 moves along with the cutter assembly 700; four advancing grooves 515 are formed in the bottom of the staple cartridge body 510, each advancing groove 515 is formed in the longitudinal direction of the staple cartridge body 510, one advancing groove 515 corresponds to one row of staple cavities 512, one part of the staple pushing sheet 513 is located in the staple cavities 512, the other part of the staple pushing sheet is located in the advancing groove 515, and when the riding sheet 5142 moves in the advancing groove 515, the riding sheet can be in contact with the part of the staple pushing sheet 513 located in the advancing groove 515 to push the staple pushing sheet 513 to move in the Z-axis direction, so that the staple 600 is fired.

In the cartridge assembly 500 of the present embodiment, through cooperation with the staple abutting seat 200, after the formation of the staple 600, the projection of the first leg 612 in the Z-axis direction is tangent or substantially tangent to the first arc 631, and the projection of the second leg 622 in the Z-axis direction is tangent or substantially tangent to the first arc 631, so that the first leg 612 and the second leg 622 are substantially opposite to the crown 630 in the Z-axis direction, which improves the clamping effect of the staple 600 on the tissue, and further reduces the probability of bleeding and air leakage of the tissue incision.

Example 2

A second embodiment of the present application discloses a staple abutment 200, wherein the staple abutment 200 is used for a surgical instrument, the surgical instrument is a thoracic surgical stapler of embodiment 1, and the staple abutment 200 is used for abutting against the staples 600 and forming the staples 600 after the staples 600 are fired.

In this embodiment, as shown in fig. 1 to 7 and 29, the staple abutting seat 200 is rotatably connected to the magazine seat 110 and is substantially in the shape of a plate, the staple abutting seat 200 includes a forming surface 210 and a plurality of forming portions 220, the forming surface 210 is a side surface of the staple abutting seat 200 facing the magazine seat 110, the plurality of forming portions 220 are formed by being recessed from the forming surface 210 in a direction away from the magazine seat 110, and the forming portions 220 are used for forming the staples 600. Staple 600, which is staple 600 of cartridge assembly 500 of example 1, includes a crown 630, a first side leg 610 and a second side leg 620, where crown 630 has an arcuate shape, first side leg 610 includes a first leg 612 and a first connecting portion 611 connected between crown 630 and first leg 612, and second side leg 620 includes a second leg 622 and a second connecting portion 621 connected between crown 630 and second leg 622. Forming portion 220 includes a first forming portion 221 and a second forming portion 222, and during formation of staple 600, first forming portion 221 forms first leg 612 and second forming portion 222 forms second leg 622 so that staple 600 is in a formed state. When staple 600 is in the initial and formed states, the projection of crown 630 in the Z-axis direction is first arc 631, and when staple 600 is in the formed state, the projection of first leg 612 in the Z-axis direction is tangent or substantially tangent to first arc 631, and the projection of second leg 622 in the Z-axis direction is tangent or substantially tangent to first arc 631. Therefore, the clamping effect of the anastomosis nail 600 on the tissue is better, and the probability of blood seepage and air leakage can be reduced when the plurality of anastomosis nails 600 are used for suturing the tissue.

Wherein the direction of formation of first leg 612 is determined by the configuration of first formation 221 and the direction of formation of second leg 622 is determined by the configuration of second formation 222. As seen in fig. 20 and 30, first contoured portion 221 has a first path 2211 and second contoured portion 222 has a second path 2221, and after staple 600 is fired in the Z-axis direction, first staple leg 612 can be contoured along first path 2211 and second staple leg 622 can be contoured along second path 2221. First leg 612 is formed along first path 2211 by moving first spike 6121 along first path 2211, bending first leg 612 and receiving first leg 2211, and by reaching the formed state, first leg 612 is still partially received in first path 2211, so the direction of extension of first path 2211 determines the direction of formation of first leg 612, and similarly the direction of extension of second path 2221 determines the direction of formation of second leg 622.

In the present embodiment, as shown in fig. 21, the projection of first path 2211 in the Z-axis direction is tangent or substantially tangent to first arc 631, and the projection of second path 2221 in the Z-axis direction is tangent or substantially tangent to first arc 631. Such that after first leg 612 is formed, its projection in the Z-axis direction is tangent or substantially tangent to first arc 631; second leg 622 is shaped such that its projection in the Z-direction is tangent or substantially tangent to first arc 631.

Specifically, as shown in fig. 31 and 32, the first forming portion 221 includes a first forming bottom surface 2212 and a first limiting wall 2213, wherein a first path 2211 is formed between a head end 22121 and a tail end 22122 of the first forming bottom surface 2212, and the first pin leg 612 moves from the head end 22121 to the tail end 22122 of the first forming bottom surface 2212 to be formed along the first path 2211. And the first forming bottom 2212 is lower than the forming surface 210, so that the forming portion 220 is recessed relative to the forming surface 210, the first limiting walls 2213 are disposed on two sides of the first forming bottom 2212, specifically on two sides of the first forming bottom 2212 in the width direction, one end of each first limiting wall 2213 is connected to the first forming bottom 2212, the other end of each first limiting wall 2213 is connected to the forming surface 210, and the first forming bottom 2212 and the two first limiting walls 2213 enclose a groove body extending along the first path 2211. When the first leg 612 is partially disposed in the slot, the first stop walls 2213 on the two sides of the width of the first shaped bottom surface 2212 can stop the first leg 612 in the width direction to prevent the first leg 612 from shifting in the width direction of the first shaped bottom surface 2212, thereby guiding the first leg 612 to move along the first path 2211. The second forming portion 222 includes a second forming 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 forming bottom surface 2222, and the second nail legs 622 move from the head end to the tail end of the second forming bottom surface 2222 to be formed along the second path 2221. Second limiting walls 2223 are disposed on two sides of second molded bottom surface 2222 in the width direction, one end of second limiting wall 2223 is connected to second molded bottom surface 2222, the other end is connected to molded surface 210, second molded bottom surface 2222 and two second limiting walls 2223 enclose a groove body extending along second path 2221, and in the same way as first molded portion 221, second molded bottom surface 2222 and two second limiting surfaces can guide second nail leg 622 to move along second path 2221.

Further, the first forming portion 221 further includes a first guiding wall 2214, one end of the first guiding wall 2214 is connected to the head end 22121 of the first forming bottom 2212, the other end is connected to the forming surface 210, and the first nail leg 612 moves to the head end 22121 of the first forming bottom 2212 through the guiding of the first guiding wall 2214 and is formed along the first path 2211. Since the first staple tip 6121 has a non-unique drop point on the first forming portion 221 when the staple 600 is fired, and is offset from the first end 22121 of the first path 2211 with a certain probability, the first guide wall 2214 is used to guide the first staple leg 612 having a drop point offset from the first end 22121 of the first path 2211 to the first end 22121 of the first path 2211, so as to better allow for the offset first staple leg 612. In this embodiment, the first guiding wall 2214 is disposed at the periphery of the head end 22121 of the first forming bottom 2212, and includes an inner side 2216 connected to the head end 22121 of the first forming bottom 2212 and an outer side 2215 connected to the forming surface 210, the head end 22121 of the first forming bottom 2212 is disposed in an arc shape, so the inner side 2216 is also an arc-shaped side, the inner diameter of the outer side 2215 is larger than that of the inner side 2216, the central angle of the outer side 2215 is substantially the same as that of the inner side 2216, and the outer side 2215 is disposed in an arc shape, so that the area of the first guiding wall 2214 on the forming surface 210 can be greatly increased compared with other shapes, and the probability of receiving the first pin 612 drop point can be greatly increased. Of course, in other embodiments, the shape of the first guide wall 2214 may be other, and in this embodiment, only the two sides of the first guide wall 2214 are both arc-shaped sides are taken as an example for description, which is not particularly limited. The second forming portion 222 further includes a second guiding wall 2224, one end of the second guiding wall 2224 is connected to the head end of the second forming bottom surface 2222, the other end is connected to the forming surface 210, and the second nail leg 622 moves to the head end of the second forming bottom surface 2222 through the guiding of the second guiding wall 2224 and is formed along the second path 2221. Similar to the first guide wall 2214, the second guide wall 2224 is configured to guide the second staple leg 622 having a landing point offset from the head end of the second path 2221 to better accommodate the second staple leg 622 having an offset landing point, thereby enabling the second staple leg 622 to be formed along the second path 2221.

Further, the width of the first pathway 2211 at the head end 22121 is greater than the width of the first pathway 2211 at the tail end 22122 and the width of the middle portion of the first pathway 2211, such that the first staple leg 612 can more easily enter the head end 22121 of the first pathway 2211. Since the width of the head end 22121 of the first path 2211 is greater than that of the tail end 22122, the first limiting walls 2213 extend from the head end 22121 of the first path 2211 to the tail end 22122 of the first path 2211, so that the distance between the two first limiting walls 2213 gradually increases from the tail end 22122 to the head end 22121 of the first path 2211, the first limiting walls 2213 have first edge lines 22131 on the forming surface 210, and the first edge lines 22131 of the two first limiting walls 2213 are two straight lines which are far 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 both end points of the outer side 2215 are connected to the two first edge lines 22141, respectively, so that the first forming portion 221 has a drop-shaped outer shape. The first forming portion 221, which is formed in a drop shape, is wider at the head end 22121 side of the first path 2211 to receive the first nail leg 612 well, and is narrower at the tail end 22122 side of the first path 2211 to form the first nail leg 612 more stably. The second molding portion 222 has the same structure as the first molding portion 221, and thus, a detailed description thereof is omitted.

After the staple 600 is fired, the first tip 6121 of the first leg 612 has a certain probability of falling onto the head end 22121 of the first path 2211, and then the first leg 612 is formed directly along the first path 2211. The first spike 6121 of the first leg 612 has a greater probability of falling onto the first guide wall 2214, and at this time, because the first leg 612 has the first inclined surface 6122, the first inclined surface 6122 can be attached to the first guide wall 2214. Wherein the laminating is as follows: including the first bevel 6122 fully abutting the first guide wall 2214, or the first bevel 6122 partially abutting the first guide wall 2214. The at least partial engagement of the first angled surface 6122 with the first guide wall 2214 ensures that the first angled surface 6122 can guide the movement of the first staple leg 612. In this embodiment, the curvature of the first guide wall 2214 is as small as possible, i.e., the first guide wall 2214 is as flat as possible, so that the first inclined surface 6122 can be attached to the first guide wall 2214 as much as possible under the deformation of the first 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 staple tip 6121 contacts the first guide wall 2214, a part of the first inclined surface 6122 is attached to the first guide wall 2214; the moving direction of the staple 600 is along the Z-axis direction, and since the first guiding wall 2214 is an inclined arc-shaped wall, the first guiding wall 2214 is inclined towards the head end 22121 of the first path 2211, and the first inclined surface 6122 can move towards the head end 22121 of the first path 2211 along the arc-shaped wall, so that the first staple leg 612 moves towards the direction of the first path 2211.

The first nail leg 612 moves towards the head end 22121 of the first path 2211 through the guiding of the first guiding wall 2214 until the first inclined surface 6122 is attached to the head end 22121 of the first path 2211, specifically, the head end 22121 of the first path 2211 is approximately a plane and perpendicular to the Z axis, the first nail leg 612 moves to the head end 22121 of the first path 2211 and is separated from the first guiding wall 2214, and at this time, the first nail leg 612 bends until the first inclined surface 6122 is completely attached to the first path 2211.

After the first bevel 6122 of the first staple leg 612 completely conforms to the first path 2211, the first bevel 6122 guides the first staple leg 612 to move, so that the first staple leg 612 moves along the first guide line 6124 in the horizontal direction, and the direction of the first guide line 6124 is substantially the same as the extending direction of the first path 2211. If the direction of the first guide line 6124 has a large deviation from the extending direction of the first path 2211, that is, the direction in which the first inclined plane 6122 guides the first staple leg 612 to move is not consistent with the first path 2211, the first staple leg 612 will be separated from the first path 2211 during the movement along the direction of the first guide line 6124 and abut against the first limit wall 2213 of the first forming portion 221, under the abutting action of the first limit wall 2213, the first staple leg 612 is bent to reenter the first path 2211 for forming, the projection of the first straight line 6123 of the first staple leg 612 in the first path 2211 in the Z-axis direction is substantially the same as the extending direction of the first path 2211, and during the forming process, the first staple leg 612 is additionally bent and deformed, which affects the forming effect of the staple 600. Thus, the orientation of the first guide line 6124 in this embodiment generally aligned with the direction of extension of the first pathway 2211 allows the first leg 612 to better follow the first pathway 2211.

Specifically, as shown in fig. 33 to fig. 34, the first forming bottom surface 2212 is substantially an arc-shaped surface, the head end 22121 of the first forming bottom surface 2212 is the lowest point of the first forming portion 221, the tail end 22122 of the first forming bottom surface 2212 is the highest point of the first forming portion 221, and the first nail tip 6121 moves along the first guide line 6124 in the horizontal direction in the process of moving along the first path 2211 and moves towards the forming surface 210 in the Z-axis direction, so that the first side nail leg 612 is arc-shaped after being deformed.

As shown in fig. 35-36, first staple point 6121 moves along first forming bottom surface 2212, first staple leg 612 also partially enters first pathway 2211 and is attached to first forming bottom surface 2212, first inclined surface 6122 moves to tail end 22122 of first pathway 2211 and is detached from first pathway 2211 as the forming process proceeds, first staple leg 612 partially locates in first forming portion 221, specifically locates in a groove surrounded by first forming bottom surface 2212 and first limit wall 2213, staple 600 continues to move in the direction of Z axis toward staple holder 200, first staple leg 612 continues to move along first pathway 2211 in first forming portion 221, the movement of the process is not guided by first inclined surface 6122 detached from first pathway 2211, but is caused by engagement of first staple leg 612 with first forming portion 221 and tendency of first staple leg 612 to move along the Z axis, first staple leg 2211 continues to move along first pathway 221 until the first staple leg 612 is fired by the tendency of staple 600 to move along the Z axis, and the staple 600 reaches the forming state,

the second leg 622 is formed in the same manner as the first leg 612, and the description thereof is omitted here.

With staple 600 in the as-formed condition, first leg 612 is flush or substantially flush with second leg 622. With conforming being a partial contact of first leg 612 with second leg 622, and with substantially conforming being a smaller distance between first leg 612 and second leg 622, close to conforming. The first leg 612 conforms or substantially conforms to the second leg 622 such that the distribution path of the force applied to the tissue by the first leg 612 is substantially continuous with the distribution path of the force applied to the tissue by the second leg 622 such that there is no gap between the first leg 612 and the second leg 622 that does not apply force to the tissue, thereby enhancing the clamping effect of the staple 600 to the tissue. And first staple leg 612 and second staple leg 622 are both attached to crown 630, making the staple approximately closed in a B-shape, making the suture more stable.

In this embodiment, the first forming portion 221 and the second forming portion 222 are both disposed obliquely with respect to the longitudinal direction of the staple holder 200, the extending direction of the first path 2211 forms an angle of 10 ° to 40 ° with the longitudinal direction, the extending direction of the second path 2221 forms an angle of 10 ° to 40 ° with the longitudinal direction, and the angle is specifically selected according to the size of the crown 630, within which range, the stapling effect of the staple 600 on the tissue is good. Further, in this embodiment, as shown in fig. 38, the first molding portion 221 and the second molding portion 222 are spaced apart in the longitudinal direction, that is, the first molding portion 221 is not connected to the second molding portion 222, so that the first leg 612 does not enter the second molding portion 222 when being molded along the first molding portion 221, which may affect the molding effect of the first leg 612. Of course, in other embodiments, the end of the first path 2211 in the first forming portion 221 may be connected with the end of the second path 2221 in the second forming portion 222, and this embodiment is not particularly limited.

In addition, in this embodiment, the forming surface 210 of the nail abutting seat 200 is provided with a spacing groove 211, the nail abutting seat 200 is divided into two parts by the spacing groove 211, the spacing groove 211 is opposite to the knife slot 511 of the nail bin assembly 500, when the cutting knife moves in the knife slot 511, some parts move in the spacing groove 211, the first part and the second part of the nail abutting seat 200 are respectively provided with two rows of forming parts 220, and each row of forming parts 220 is respectively opposite to each row of nail cavities 512 of the nail bin assembly 500 and is respectively used for forming the nails 600 fired from the corresponding nail cavities 512. The two rows of forming parts 220 of the nail abutting seat 200 on one side of the spacing groove 211 are respectively a first row far away from the spacing groove 211 and a second row arranged between the first row and the spacing groove 211, the two rows of forming parts 220 are arranged in a longitudinally offset mode, so that a first forming part 221 of the first row is opposite to a second forming part 222 of the second row in the transverse direction of the nail abutting seat 200, and the inclined directions of the first forming part 221 of the first row and the second forming part 222 of the second row are consistent (the extending directions of the first forming part 221 and the second forming part 222 are parallel). The second forming portions 222 of the first row and the first forming portions 221 of the second row are arranged in a row in the transverse direction of the nail seat 200, and the second forming portions 222 of the first row and the first forming portions 221 of the second row are inclined in the same direction (the extending directions of the two are parallel). So that the forming parts 220 of the first row and the forming parts 220 of the second row can be stacked to save space, the stacking means that: any one of the forming portions 220 of any one row overlaps with the forming portions 220 of the other row in the longitudinal direction.

The nail abutting seat in this embodiment can shape the arc-shaped nail, so that the projection of the first leg 612 of the shaped arc-shaped nail in the Z-axis direction is tangent or approximately tangent to the first arc 631, and the projection of the second leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc 631. Therefore, the incised tissue part is tightly sutured, and the probability of blood leakage and air leakage of the tissue incision is reduced.

Example 3

A third embodiment of the present application provides a surgical instrument, which may be a stapler, particularly a stapler applied to thoracic surgery, the surgical instrument includes an end effector 100, a cutting knife assembly 700, a shaft assembly 300, and a manipulating assembly 400, the end effector 100 includes a jaw assembly and a cartridge assembly 500, the jaw assembly includes a cartridge seat 110 and a staple-supporting seat 200 as in embodiment 2, the staple-supporting seat 200 is rotatably connected to the cartridge seat 110, and the cartridge seat 110 has the cartridge assembly 500 as in embodiment 1 mounted therein. When the surgical instrument works, the surgical instrument can extend into the chest cavity of a patient from a gap between two ribs to cut and suture tissues to be operated, after the surgical instrument is sutured, each staple 600 is in a forming state, a projection of a first staple leg 612 of each staple 600 in the Z-axis direction is tangent or approximately tangent to a first arc line 631, a projection of a second staple leg 622 in the Z-axis direction is tangent or approximately tangent to the first arc line 631, and the probability of bleeding and air leakage of a tissue incision is reduced.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (12)

1. The nail abutting seat is used for forming anastomotic nails and is characterized by comprising a forming surface and forming parts, wherein the forming parts are formed by respectively sinking from the forming surface; the anastomosis nail comprises a nail crown, a first nail leg and a second nail leg, wherein the first nail leg and the second nail leg are connected with the nail crown; each forming part comprises a first forming part and a second forming part, the first forming part forms the first nail leg, and the second forming part forms the second nail leg so that the anastomotic nail is in a forming state; when the anastomotic nail is in the forming state, the projection of the nail crown in the Z-axis direction is a first arc line; the projection of the first leg in the Z-axis direction is tangent or substantially tangent to the first arc and the projection of the second leg in the Z-axis direction is tangent or substantially tangent to the first arc.

2. The staple holder of claim 1, wherein the first contoured portion has a first path and the second contoured portion has a second path;

a projection of the first path in the Z-axis direction is tangent or substantially tangent to the first arc line, and a projection of the second path in the Z-axis direction is tangent or substantially tangent to the first arc line; after the anastomosis nail is fired along the Z-axis direction, the first nail leg is formed along the first path; the second staple leg is formed along the second path to place the staple in the formed condition.

3. The staple holder as claimed in claim 2, wherein said first path is angled at 10 ° -40 ° to the longitudinal direction and said second path is angled at 10 ° -40 ° to the longitudinal direction.

4. The nail anvil of claim 2, wherein the first forming portion comprises a first forming bottom surface and a first limiting wall, the first forming bottom surface further comprises the first path formed between a head end and a tail end thereof, the first nail leg moves from the head end to the tail end of the first forming bottom surface to form along the first path, and the first limiting wall is provided at both sides of the first forming bottom surface to guide the first nail leg to move along the first path; the second forming part comprises a second forming bottom surface and a second limiting wall, the second forming bottom surface further comprises a second path formed between the head end and the tail end of the second forming bottom surface, the second nail legs move towards the tail end from the head end of the second forming bottom surface to form along the second path, and the second limiting wall is arranged on two sides of the second forming bottom surface to guide the second nail legs to enable the second nail legs to move along the second path.

5. The nail anvil according to claim 4, wherein the first forming portion further comprises a first guide wall having one end connected to the head end of the first forming bottom surface and the other end connected to the forming surface, and the first nail leg is guided by the first guide wall to move to the head end of the first forming bottom surface; the second forming part further comprises a second guide wall, one end of the second guide wall is connected with the head end of the second forming bottom surface, the other end of the second guide wall is connected with the forming surface, and the second nail leg moves to the head end of the second forming groove through the guide of the second guide wall.

6. The nail seat according to claim 5, wherein the first guide wall and the second guide wall are both arc-shaped walls.

7. The nail anvil of claim 1, wherein the first forming portion and the second forming portion are spaced apart in a longitudinal direction.

8. The nail anvil according to claim 1, wherein the nail anvil comprises a spacing groove dividing the forming surface into two portions, each portion having two rows of the forming portions.

9. A surgical instrument, comprising: the nail-pushing device comprises a handle assembly, a shaft assembly, a jaw assembly and a nail cabin assembly, wherein the shaft assembly is connected with the handle at the proximal end, and is connected with the jaw assembly at the distal end, the jaw assembly is characterized by comprising a nail cabin seat and a nail pushing seat according to any one of claims 1-8; the nail bin seat is used for detachably mounting the nail bin assembly, and the nail abutting seat is rotatably connected with the nail bin seat; the handle is used for driving the rod body assembly to move so as to further fire a plurality of staples of the staple cartridge assembly to move from the staple cavity opening to the staple abutting seat; the forming parts of the nail abutting seat correspond to the nail cavity openings of the nail bin assembly one by one, so that anastomotic nails shot from the nail cavity openings are formed, and the anastomotic nails are in a forming state.

10. The surgical instrument of claim 9 wherein said first leg has a first bevel on a side distal from said crown and a first tip formed by said first bevel, said second leg has a second bevel on a side distal from said crown and a second tip formed by said second bevel; in the process that the anastomosis nail is switched from the initial state to the forming state, the first inclined surface is attached to the first forming portion to guide the first nail leg to be formed, and the second inclined surface is attached to the second forming portion to guide the second nail leg to be formed.

11. The surgical instrument of claim 10, wherein the first bevel is sloped in a first direction, a line drawn in the first direction through the first staple tip being a first 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 during the process of switching the staple from the initial state to the forming state, the first inclined surface is attached to the first forming portion to guide the first staple leg to form along the first guide line, and the first guide line is tangent or approximately tangent to the first curved line;

the second inclined plane inclines along a second direction, and a straight line passing through the second nail tip and made along the second direction is a second straight line; when the staple is in the initial state, a projection of the second straight line in the Z-axis direction is a second guide line, and during the process of switching the staple from the initial state to the forming state, the second inclined surface is attached to the second forming portion 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.

12. The surgical instrument according to claim 9, wherein the cartridge assembly includes a cartridge body provided with a plurality of staple cavities, staples being provided in the staple cavities in one-to-one correspondence, and a plurality of pusher plates partially located in the staple cavities and supporting the staples, the pusher plates moving in the Z-axis direction in response to movement of the pusher to fire the staples.

Images