CN216060618U

CN216060618U - Nail bin assembly and surgical instrument

Info

Publication number: CN216060618U
Application number: CN202122093195.7U
Authority: CN
Inventors: 孙宝峰; 杨庆辉
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-03-18
Anticipated expiration: 2031-09-01

Abstract

The utility model provides a nail bin assembly and a surgical instrument. A staple cartridge assembly comprising: the nail bin comprises a nail bin main body, a nail feeding mechanism and a nail clamping mechanism, wherein the nail bin main body is provided with a plurality of nail cavities, and the nail cavities are provided with nail cavity openings on the nail outlet surface of the nail bin main body; the staple comprises a base part and two staple legs, each staple leg is connected to one of two end parts of the base part, and the base part is bent when viewed along the extending direction of the two staple legs; the gasket is arranged on the nail outlet surface and covers the nail cavity opening; when the staples are fired, the staples are pushed out of the staple cavity openings and the staples carry the pads apart from the staple exit surface. The utility model can effectively avoid the tissues from being crushed by the anastomosis nail and effectively avoid the risk of blood leakage and air leakage.

Description

Nail bin assembly and surgical instrument

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a nail bin assembly and a surgical instrument.

Background

The surgical instrument may include an end effector comprising a cartridge seat for receiving a cartridge assembly and a staple abutment seat; the nail bin assembly comprises a nail bin main body and anastomotic nails arranged in the nail bin main body, a plurality of nail cavities used for containing the anastomotic nails are arranged in the nail bin main body, the nail bin main 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 the prior art, the anastomotic nails are directly nailed on tissues, the contact area of the anastomotic nails and the tissues is small, the pressure is high, the tissues are easy to be damaged, and particularly, the risks of air leakage and blood seepage are easy to occur in the lung operation. In addition, in the forming process of the staples, gaps exist between the corresponding staple holes and the staples, and air leakage and blood seepage can be caused. In addition, the width of the nail bin assembly adopted by the prior art is too large, and when the nail bin assembly is inserted into a body from a gap between two ribs through an end effector, the ribs are easily damaged, so that postoperative rib pain of a patient is caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a nail bin assembly and a surgical instrument, which can effectively avoid tissues from being crushed by anastomosis nails and effectively avoid the risks of blood leakage and air leakage.

The utility model provides a staple cartridge assembly, comprising:

the nail bin comprises a nail bin main body, a nail cavity and a cutting knife assembly, wherein the nail cavity is provided with a plurality of nail cavities, the nail cavities are provided with nail cavity openings on a nail outlet surface of the nail bin main body, the nail cavity openings are arranged on the nail outlet surface of the nail bin main body, the nail cavity grooves are used for allowing the cutting knife assembly to move, the nail cavity grooves extend along the front-back direction of the nail bin assembly, two rows of the nail cavities are arranged on two sides of the nail cavity grooves respectively, and each row of the nail cavities extends along the front-back direction;

a plurality of staples disposed within the plurality of staple cavities, the staples including a base portion and two staple legs, each of the staple legs being connected to one of both end portions of the base portion, the base portion being curved as viewed in a direction in which the two staple legs extend;

a shim mounted to the nail exit face and covering the nail cavity opening;

as the staples are fired, the staples are pushed out of the staple cavity openings and the staples carry the shim apart from the staple exit surface.

In at least one embodiment, the gasket is sheet-like.

In at least one embodiment, the spacer has a thickness to width ratio of 1: 5 to 1: 20.

in at least one embodiment, the spacer has a thickness to width ratio of 1: 8 to 1: 15.

in at least one embodiment, the thickness of the shim is 0.1 mm to 0.5 mm.

In at least one embodiment, a straight line passing through a gap between the staples located on the same side of the channel and adjacent in the front-rear direction always intersects at least one of the staples located on the same side of the channel.

In at least one embodiment, the cartridge assembly includes a plurality of the pads, and a straight line passing through a gap between the pads located on the same side of the channel and adjacent in the front-to-rear direction always intersects at least one of the pads located on the same side of the channel.

In at least one embodiment, the width of the gap between the shims adjacent in the fore-aft direction is less than 1/15 the length of an individual shim; and/or

The gap between the two rows of shims on the same side of the gate is less than 1/15 the width of a single shim.

In at least one embodiment, the base portion is curved or V-shaped or W-shaped, and in the two rows of staples on the same side of the knife track, both end portions of the base portion of the staple in one row are bent toward the staple in the other row to be close to the staple in the other row, and the cross section of the staple cavity is adapted to the base portion so as to guide the staples to move in the thickness direction of the cartridge assembly.

In at least one embodiment, the two rows of staple cavities on the same side of the gate are staggered.

In at least one embodiment, the cartridge assembly includes a plurality of the spacers, each of the spacers covering a plurality of the staple cavity openings such that each of the spacers is accessible for a plurality of staples.

In at least one embodiment, the plurality of staple cavity openings covered by each shim includes a different row of staple cavity openings located on one side of the channel.

In at least one embodiment, one shim covers an entire row of staple cavities on one side of the channel or covers all of the staple cavities on one side of the channel.

In at least one embodiment, the spacer includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are staggered in the front-rear direction and the left-right direction of the cartridge assembly, the first plate portion and the second plate portion are integrally formed, the first plate portion is provided with two through holes for fitting with one staple, and the second plate portion is provided with two through holes for fitting with the other staple.

In at least one embodiment, the staple cartridge assembly comprises a plurality of said spacers, two or more of said spacers being connected together by a frangible connection.

In at least one embodiment, the staple cartridge assembly comprises a plurality of said spacers, the staple exit face of said staple cartridge body comprising a recess disposed about said staple cavity opening, said spacers being mounted to said staple exit face by an interference fit with said recess.

In at least one embodiment, the gasket is affixed to the pin-out face.

In at least one embodiment, the spacer has a through hole for the nail leg to pass through, and the through hole may be a shaped hole that opens toward the side of the spacer.

There is also provided a surgical instrument comprising an end effector comprising a jaw assembly, the jaw assembly comprising: the nail bin seat is used for installing the nail bin assembly; and a staple abutting seat which can be opened and closed relative to the staple cartridge seat,

the end effector also comprises an end effector sleeve which can be sleeved on the nail bin seat and/or the nail abutting seat.

In at least one embodiment, the end effector further comprises the cartridge assembly mounted to the cartridge seat, which may be a cartridge assembly according to the present application; the end effector is sleeved on the nail bin assembly and the nail bin seat.

In at least one embodiment, the end effector sleeve includes a first piece and a second piece, the first piece being detachably connectable to the second piece, the first piece being positioned between the cartridge seat and the staple seat when the end effector sleeve is nested in the cartridge seat and/or the staple seat.

Optionally, the first sheet may be made of an absorbable, dissolvable or degradable material.

In at least one embodiment, the first panel portion and the second panel portion are sewn together by a thread, the first panel portion and the second panel portion are separable by removal of the thread, or the first panel portion and the second panel portion are connected together by a frangible connection.

In at least one embodiment, the end effector is sleeved on the nail abutting seat,

the end effector further comprises a staple cartridge assembly mounted to the staple cartridge seat, the staple cartridge assembly being in accordance with the present application.

According to the utility model, the gasket is arranged on the nail bin main body, so that the anastomotic nails and the gasket are nailed together on the tissue, the contact area between the anastomotic nails and the gasket and the tissue is increased, the pressure in the contact area is uniform, the tissue is prevented from being crushed when tissues or organs such as lung tissues, lung interstitium and the like are sutured, and meanwhile, the risk of blood seepage and air leakage is avoided; meanwhile, the gasket can be pressed near a nail hole formed on the tissue of the anastomotic nail, and the gap between the nail hole and the anastomotic nail can be reduced by applying pressure to the tissue near the nail hole, so that the phenomena of blood seepage and air leakage of the nail hole can be avoided. In addition, the base of the staples are curved, such as curved or V-shaped or W-shaped staples, which enable the staples to be more closely overlapped than conventional straight staples, resulting in a staple line with greater staple coverage over the same area to reduce the likelihood of tearing, leakage and/or bleeding after the stapling step.

The end effector sleeve may function similarly to a shim. The end effector sleeve and the shim may be used together or separately.

The present invention also provides staplers comprising the staple cartridge assembly and/or end effector described above.

Drawings

Fig. 1 shows a schematic structural view of a stapler according to an embodiment of the present application.

FIG. 2 illustrates an exploded view of an end effector of a stapler according to one embodiment of the present application.

FIG. 3 illustrates a schematic view of one possible cartridge assembly.

FIG. 4 illustrates a top view of one possible staple cartridge assembly.

Fig. 5 shows a cross-sectional view taken along line a-a in fig. 4.

FIG. 6 illustrates a schematic view of the distribution of staples of one possible cartridge assembly.

FIG. 7 illustrates a schematic structural view of a staple cartridge assembly according to a first embodiment of the present application.

Fig. 8 shows a cross-sectional view taken along line B-B in fig. 7.

Fig. 9 shows a schematic view of the distribution of shims and staples of a cartridge assembly according to a first embodiment of the present application.

Fig. 10 shows a schematic view of a stapler according to a first embodiment of the present application for pulmonary surgery.

Fig. 11 shows a schematic structural view of a staple of one possible cartridge assembly according to the present application.

Fig. 12 shows a schematic view of another angled configuration of staples of one possible cartridge assembly according to the present application.

Fig. 13 shows a schematic structural view of a staple of another possible cartridge assembly according to the present application.

Fig. 14 shows a structural schematic view of another angle of staples of another possible cartridge assembly according to the present application.

Fig. 15 shows a schematic view of the distribution of staples of one possible cartridge assembly according to the present application.

Fig. 16 shows a schematic view of the distribution of staples of another possible cartridge assembly according to the present application.

Fig. 17 illustrates a schematic view of the distribution of shims and staples of one possible cartridge assembly according to the present application.

Fig. 18 illustrates a schematic view of the distribution of shims and staples of another possible cartridge assembly according to the present application.

FIG. 19 illustrates a schematic structural view of a staple cartridge assembly according to a second embodiment of the present application.

Fig. 20 shows a cross-sectional view taken along line C-C in fig. 19.

Fig. 21 shows a schematic view of the distribution of shims and staples of a cartridge assembly according to a second embodiment of the present application.

Fig. 22 shows an enlarged schematic view of a spacer and staples of a cartridge assembly according to a second embodiment of the present application.

FIG. 23 shows a schematic structural view of an end effector according to an embodiment of the present application.

Fig. 24 shows a schematic view of the structure of the staple not contacting the staple abutment.

Fig. 25 shows a schematic view of the structure of the staple deformed by contact with the anvil.

Description of the reference numerals

10 operating assembly 20 shaft assembly

30 end effector 301 jaw assembly 302 staple cartridge assembly 303 staple cartridge mount 304 abuts staple mount 3041 abuts staple mount channel

40 cutter assembly 401 cutter bar 402 ejector pin plate

1 nail outlet surface of nail cavity 13 of trough 12 of nail bin main body 11

2 nail pushing sheet

3 shim 31 first plate 32 second plate 33 through hole

Base of leg 42 of 4-staple 41

5 bracket

6 first piece 62 second piece of end effector sheath 61

100 lung

S channel S10 first gap S20 second gap S1 third gap S2 fourth gap

X front-back direction Y left-right direction.

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 utility model and are not intended to limit the utility model. 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", "posterior" and "distal", "anterior" are used herein with respect to the clinician manipulating the stapler. The terms "proximal" and "posterior" refer to portions that are relatively close to the clinician (or, alternatively, to the operating assembly 10 of the stapler, see FIG. 1), and the terms "distal" and "anterior" refer to portions that are relatively far from the clinician (or, alternatively, to the operating assembly 10 of the stapler, or, alternatively, to the end effector 30 of the stapler, see FIG. 1). 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 other relationship, such as abutment. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

(first embodiment)

As shown in fig. 1 and 2, the present application provides a stapler including a handle assembly 10, a shaft assembly 20 extending forward from the handle assembly 10, an end effector 30 provided at one end (front end) of the shaft assembly 20, and a cutter assembly 40 for performing tissue cutting.

The operating assembly 10 includes a housing and a power source module. In one embodiment, the power source module includes a handle that is manually operated by a user and is connected to a transmission as described below. In another embodiment, the power source module includes an electric motor disposed within the housing and a power module including a battery for providing electrical power for the electric motor for rotation, the electric motor being connected to a transmission as described below. The type of power source module does not limit the scope of the present application. In the following, the overall function of the stapler will be described by taking the power source module including the motor and the power source module as an example.

The housing of the operating assembly 10 may include, in positional relationship, a handle housing and a head housing connected, the head housing may house the transmission mechanism, and the handle housing may be held by a user.

The shaft assembly 20 may include a mandrel and a sleeve disposed over the mandrel. The stapler may further include a transmission connected to the power source module, and the transmission may include a first transmission mechanism and a second transmission mechanism. The sleeve may be driven in axial movement (relative to the operating assembly 10, or housing of the operating assembly 10) by a first transmission mechanism, and the mandrel may be driven in axial movement (relative to the operating assembly 10, or housing of the operating assembly 10) by a second transmission mechanism, both of which may be moved axially forward or backward.

End effector 30 may include a jaw assembly 301 and a cartridge assembly 302. The jaw assembly 301 can include a cartridge receptacle 303 and a staple abutment 304 pivotally connected to the cartridge receptacle 303, the cartridge receptacle 303 being configured to operably support a staple cartridge assembly 302 therein. The anvil 304 is selectively movable between an open position and a closed position to switch between an open state and a closed state such that the anvil 304 and the cartridge assembly 302 cooperate to unclamp or clamp tissue.

One end (front end) of the sleeve is connected to the nail abutting seat 304, and the other end (rear end) is connected to a first transmission mechanism which can drive the sleeve to move backwards or forwards. Rearward movement of the cannula can cause the anvil 304 to pivot upward to open the jaw assembly 301, and forward movement of the cannula can cause the anvil 304 to pivot downward to close the jaw assembly 301.

The cutter assembly 40 is coupled to the spindle for being driven by the spindle to perform a firing or retracting motion. Specifically, the cutting blade assembly 40 includes a blade bar 401 and a nail pushing plate 402 located at a front end of the blade bar 401.

One end (front end) of the mandrel is positioned in the sleeve, and the other end (rear end) of the mandrel is connected to the second transmission mechanism. A portion of the cutter assembly 40 is located within the sleeve and is connected to the forward end of the mandrel. During stapling and cutting, the ejector plate 402 is located in the space formed between the cartridge seat 303 and the anvil seat 304. The second transmission mechanism can drive the mandrel to move forwards and backwards. When cartridge assembly 302 is installed, forward movement of the mandrel may cause staple pusher plate 402 to move forward, pushing staples 4 of cartridge assembly 302 out of the staples to staple tissue and cut the tissue by the cutting knife of cutting knife assembly 40. The rearward movement of the mandrel may cause the cutting knife assembly 40 to move rearward to return to the initial position.

It is understood that staplers use staples to staple tissue, which are also commonly referred to as anastomoses or sutures, as known to those skilled in the art.

The process of stapling and severing tissue with the (motorized) stapler will now be briefly described.

The jaw assembly 301 is closed and the motor drives the jaw assembly 301 closed via the first transmission mechanism to clamp tissue.

The cutter assembly 40 is fired and the motor drives the cutter assembly 40 through a second transmission mechanism to advance to staple and cut tissue.

The cutter assembly 40 retracts, and the motor drives the cutter assembly 40 to retract through the second transmission mechanism.

The jaw assembly 301 is opened, and the motor drives the jaw assembly 301 to open through the first transmission mechanism to loosen the tissue, so that the suturing and cutting functions of the anastomat are realized.

As shown in fig. 2-6, one possible cartridge assembly 302 may include a cartridge body 1, a staple pusher sheet 2, staples 4, and a carrier 5.

The cartridge body 1 is provided with a knife path 11 and a staple cavity 12, the knife path 11 provides movement of the cutter assembly 40 and provides guidance for the movement of the cutter assembly 40, and therefore, the knife path 11 may also be referred to as a guide groove. In the left-right direction Y (which may also be referred to as a width direction) of the magazine assembly 302, the staple cavities 12 are located on both left and right sides of the pocket 11, a plurality of staple cavities 12 extending in the front-rear direction X are formed in a row, and a plurality of rows of staple cavities 12 may be provided on both sides of the pocket 11, for example, three rows of staple cavities 12 are provided on both sides of the pocket 11 in the example shown in fig. 3 and 4. The multiple rows of staple cavities 12 can accommodate multiple rows of staples, which can result in a wider width of staple stapled tissue.

Each staple cavity 12 may be provided with one staple 4 therein, and the staple pusher 2 is located at the bottom of the staple 4, and the staple pusher 2 is used to push the staple 4 out of the staple cavity 12. The cartridge main body 1 is connected with the bracket 5, and the bracket 5 can block the lower openings of the channel 11 and the nail cavity 12, so that the nail pushing sheet 2 and the staples 4 can be kept in the nail cavity 12.

As cutting knife assembly 40 moves forward, pusher plate 402 fires pusher plate 2 toward the staple exiting face, moving staples 4 away from staple cavities 12, thereby stapling the tissue.

In fig. 5, three states of staples 4 are shown, from right to left in order that staples 4 completely exit staple cavities 12 after being fired, staples 4 partially exit staple cavities 12 during firing, and staples 4 remain unfired within staple cavities 12.

Referring to fig. 6, looking down on rows of staples 4, or rows of staples 4 formed in tissue after staples 4 in cartridge assembly 302 are fired into engagement with the tissue, a first gap S10 between adjacent staples in one row of staples 4 and a second gap S20 between adjacent staples in another row of staples 4 may be connected by a linear path S. That is, the inner and outer portions of the staple (the upper and lower sides of the two rows of staples in fig. 6) are connected by a straight channel S. It will be appreciated that suture outer may refer to the side closer to the wound and suture inner may refer to the side further from the wound.

The above-mentioned cartridge assembly 302 has the following problems when used in lung surgery.

(i) The width of cartridge assembly 302 is increased by the three rows of staples shown in fig. 4, which can cause rib pain when end effector 30 is inserted into the body from the gap between two ribs.

(ii) The nail hole is easy to cause the phenomena of blood seepage and air leakage.

(iii) The contact area between the base part of the anastomosis nail and the tissue is small, the pressure is strong, the tissue is easy to be damaged, and blood and air leakage are easy to occur.

Referring to fig. 6, blood vessels in the lung tissue, the pulmonary interstitium, such as capillaries, may be located in the channel S without being fixed by the staples 4, with a greater risk of bleeding. Also for pulmonary surgery, the straight passage S presents a greater risk of air leakage due to the presence of air in the lung tissue.

As shown in fig. 7 to 9, to solve the above problem, a cartridge assembly 302 of the present application may include a cartridge body 1, a staple pushing plate 2, a spacer 3, staples 4, and a carrier 5.

The cartridge body 1 is provided with a chute 11 and a staple cavity 12. The staple cavity 12 forms a staple cavity opening on a staple outlet surface 13 of the cartridge body 1, and when the staples 4 in the staple cavity 12 are fired, the staples 4 are pushed out from the staple cavity opening. In the left-right direction Y of the magazine assembly 302, the staple cavities 12 may be located on the left and right sides of the channel 11, and the plurality of staple cavities 12 extending in the front-rear direction X are formed in a row, and in the example shown in fig. 7, two rows of staple cavities 12 are provided on each side of the channel 11. The two rows of staple cavities 12 allow the cartridge assembly 302 to be smaller in size in the left-right direction Y as compared to the three rows of staple cavities 12. As shown in FIG. 10, it can be understood that when the lung 100 is operated by using the stapler, the end effector 30 is inserted into the body from the gap between two ribs to hold the lung 100. The width of the nail bin assembly 302 in the left-right direction Y is small, so that the end effector 30 can be conveniently inserted into a body from a gap between two ribs, the operation is convenient, and the pain of a patient is reduced.

Staples 4 are provided within the plurality of staple cavities 12, the staples 4 comprising a base 42 and two legs 41 (see e.g. fig. 11 to 14), each leg 41 being connected to one of the two ends of the base 42, the base 42 being curved as seen in the direction of extension of the two legs 41, enabling the staples to be arranged more closely overlapping compared to conventional straight staples, resulting in staple lines with greater staple coverage over the same area to reduce the likelihood of tearing, leakage and/or bleeding after the stapling step. See below for a more detailed description of staples. Meanwhile, the structure of the gasket is used for increasing the contact area with tissues, avoiding injuring the tissues by pressure and effectively realizing the effect of avoiding blood seepage and air leakage.

As shown in fig. 8 and 9, the shim 3 may be mounted to the nail face 13 and cover the nail cavity opening of the nail cavity 12. Here, preferably, on the same side of the pocket 11, the pads 3 are configured such that a straight line (refer to a solid line L1 and a broken line L2 in fig. 9) passing through the third gap S1 and the fourth gap S2 between the pads 3 adjacent in the front-rear direction X inevitably intersects at least one pad 3, in other words, a passage extending from one side of the mating region to the other side of the mating region through the third gap S1 and the fourth gap S2 of the pads 3 adjacent in the front-rear direction X may not be non-linear. The gasket 3 can increase the contact area of the anastomotic nail 4 and the tissue, thereby reducing the pressure of the anastomotic nail 4 to the tissue, effectively avoiding the risk that the anastomotic nail 4 hurts the tissue due to larger suturing force, and further reducing the risk of blood leakage and air leakage. The gasket 3 can also be pressed near the nail holes formed on the tissue by the staples 4, and the gaps between the nail holes and the staples 4 can be reduced by applying pressure to the tissue near the nail holes, so that the occurrence of blood leakage and air leakage is avoided.

Here, preferably, the third gap S1 and the fourth gap S2 may be almost absent. For example, the widths of the third and fourth gaps S1 and S2 may be less than 1/15 the length of a single shim 3, and more preferably less than 1/25 the length of a shim 3.

Preferably, there is little gap between the two rows of pads 3 on the same side of the gate 11. For example, the gap between two rows of shims 3 on the same side of the gate 11 may be less than 1/15 the width of a single shim 3, and more preferably less than 1/25 the width of a single shim 3.

The nail outlet surface 13 of the nail cartridge main body 1 can comprise a groove arranged around the nail cavity opening, the gasket 3 can be arranged on the nail outlet surface 13 through interference fit with the groove, and when the nail pushing sheet 2 pushes the staples 4 out of the nail cavity 12, the staples 4 can take the gasket 3 to be separated from the nail cartridge main body 1.

In one possible embodiment, the pad 3 may be attached to the nail ejection surface 13 of the cartridge body 1 or a groove of the nail ejection surface 13, and the staples 4 may be detached from the cartridge body 1 with the pad 3 when the staple pusher 2 pushes the staples 4 out of the staple cavities 12.

As shown in fig. 9 and 11, the spacer 3 may be, for example, a rectangular sheet, and the surface of the spacer 3 facing the outside of the staple cavity 12 may be a flat surface, so that the smooth flat surface of the spacer 3 can contact the tissue when the operation is performed. The spacer 3 may be provided with through holes 33 through which the legs 41 of the staples 4 may pass, e.g. the legs 41 may pass through the through holes 33 during firing of the staples 4. The side of the pad 3 facing the base 42 of the staple 4 may also be planar. Thus, the surface of the gasket 3 is flat, the pressing area with the tissue is large, the structure is simple, the cost is low, and a plurality of gaskets 3 can be formed by cutting or cutting the sheet-shaped raw material.

In one possible embodiment, legs 41 of staples 4 may snap into through-holes 33 (e.g., by elastic deformation), and in order to facilitate the snap-fitting of legs 41, through-holes 33 may be, for example, L-shaped profiled holes. Specifically, it is possible to load the legs 41 of the staples 4 into the shaped hole from the side of the pad 3 through the opening of the shaped hole in a state where the legs 41 of the staples 4 are brought slightly closer to each other, and then release the legs 41 of the staples 4 so that the staples 4 are caught in the through holes 33 of the pad 3 by the tension of the two legs 41. In this way, staples 4 and pads 3 can be loaded together (in the assembled state) into staple cavities 12. The assembly process can be simplified.

Of course, the present application is not limited to this, and for example, the through hole 33 may be a through hole that is not open on the side of the gasket 3, such as, but not limited to, a circular hole.

In order to save space, the thickness of the gasket 3 may be as thin as possible while ensuring the strength of the gasket 3, for example, the thickness of the gasket 3 may be 0.1 mm to 0.5 mm.

The ratio of the thickness to the width W of the gasket 3 may be 1: 5 to 1: 20, preferably, 1: 8 to 1: 15. fig. 9 shows the width W of the substantially rectangular spacer 3. Fig. 17 shows the width W of a rectangular sheet-like spacer 3 whose long side is a convex circular arc, which may be the maximum width of the illustrated spacer. Fig. 18 shows the width W of the long sheet-like gasket 3 bent in a circular arc shape. Fig. 22 shows a pad 3 corresponding to a plurality of staples 4, and the width W of the pad 3 may be the width of a portion of the pad corresponding to one (or one row) of staples 4, or the width of a first plate portion 31 or a second plate portion 32 described later.

The pad 3 may remain in the body after surgery and the pad 3 may be made of, but not limited to, absorbable, dissolvable or degradable materials or materials that do not readily react in the body. For example, the absorbable material may be polyglycolic acid and the pad 3 of absorbable material may disappear after a period of engagement with the tissue. For example, the material that does not readily react in the human body may be a metal material, and an example of the metal material may be a titanium alloy.

As shown in fig. 17 and 18, in other possible embodiments, the shape of the spacer 3 is not limited to a rectangle. For example, in the example shown in fig. 17, the pads 3 are formed in a rectangular sheet shape having one long side being a convex circular arc, preferably, the convex circular arc is located on both sides of the two rows of pads 3 away from each other. In the example shown in fig. 18, the spacers 3 are formed in a long sheet shape that is curved, in particular, curved in a circular arc shape, with the convex side of the curve being located on both sides of the two rows of spacers 3 that are away from each other.

Here, on the same side of the gate 11, it is still satisfied that a straight line passing through the third gap S1 and the fourth gap S2 of the adjacent pads 3 in the front-rear direction X inevitably intersects at least one pad 3, in other words, a passage extending from one side of the mating region to the other side of the mating region through the third gap S1 and the fourth gap S2 of the adjacent pads 3 in the front-rear direction X may not be straight.

As shown in fig. 8, one staple 4 may be disposed within each staple cavity 12, with a staple pusher 2 located at the bottom of the staple 4, the staple pusher 2 being used to push the staple 4 out of the staple cavity 12. The cartridge main body 1 is connected with the bracket 5, and the bracket 5 can block the lower openings of the channel 11 and the nail cavity 12, so that the nail pushing sheet 2 and the staples 4 can be kept in the nail cavity 12.

As the cutting knife assembly 40 moves forward (to the left in fig. 8), the pusher plate 402 fires the pusher plate 2 toward the staple ejection face 13 side, causing the staples 4 to move away from the staple cavities 12, thereby stapling the tissue. Referring to fig. 24 and 25 simultaneously, staples 4 in staple cavities 12 are fired away from staple cavities 12, and staple legs 41 are bent against staple seats 304 to staple tissue. Two suturing regions may be formed on both sides of the knife path 11, and the staple pushing plate 402 moves forward along the knife path 11 to cut the tissue from the middle of the two suturing regions.

In fig. 8, three states of staples 4 are shown, from right to left in order for staples 4 to be fully fired and out of staple cavities 12; the staples 4 partially exit the staple cavities 12 during firing; staples 4 remain unfired within staple cavities 12.

Staple 4 may include legs 41 and a base 42, with two legs 41 connected to both ends 422 of base 42 (see fig. 15, 16), and the connection portions of legs 41 and base 42 may transition through rounded corners. The free ends of the two legs 41 may form sharp spikes which facilitate penetration of the staples 4 into the body tissue. The two legs 41 are parallel to each other (including substantially parallel) and the legs 41 are substantially perpendicular to the base 42. When the staples 4 are not fired, the staples 4 are positioned in the staple cavities 12, and the staple points do not exceed the staple outlet surface 13 of the staple cartridge body 1.

It will be appreciated that the parallel (including substantially parallel) of legs 41 is intended to convey the overall shape of staple 4, and in fact, the two legs 41 may be slightly flared at their distal ends (the ends remote from base 42) so that staple 4 assumes a flared U-shape. When loading staples 4 into staple cavities 12, both staple legs 41 may be slightly compressed so that staples 4 may be mounted to staple cavities 12 by virtue of the tension of staple legs 41 so that staples 4 are less likely to fall out of staple cavities 12.

As shown in fig. 11 to 14, the base portion 42 is curved, more specifically, the base portion 42 is curved as viewed in the extending direction of the two legs 41, and for example, the base portion 42 may be circular arc-shaped or V-shaped or W-shaped. Accordingly, the cross-section of staple cavities 12 may be adapted to base 42 to guide the movement of staples 4 through the thickness of cartridge assembly 302, where the cross-section of staple cavities 12 may be adapted to base 42 including the cross-section of staple cavities 12 matching base 42, e.g., the cross-section of staple cavities 12 receiving staples 4 is also circular or V-shaped or W-shaped; also included is a staple cavity 12 having a cross-section that can accommodate the base 42, e.g., the staple cavity 12 can also have a rectangular, oval, etc. cross-section.

Referring to fig. 15, on the same side of knife path 11, preferably, a straight line (refer to a broken line L0 in fig. 15) passing through first gap S10 and second gap S20 between adjacent staples 4 in the front-rear direction X necessarily intersects at least one staple 4, in other words, a passage extending from one side in the left-right direction of cartridge assembly 302 (or one side of the staple region) to the other side in the left-right direction of cartridge assembly 302 (or the other side of the staple region) through first gap S10 and second gap S20 of adjacent staples 4 in the front-rear direction X may not be non-linear. Therefore, the suture inner part and the suture outer part can not be connected through a straight channel, and the risk of blood seepage and air leakage is reduced for the lung operation.

It will be appreciated that this is also satisfied by the examples shown in fig. 9 and 17.

As shown in fig. 15 and 16, in the two rows of staples 4 on the same side of the knife path 11, both end portions 422 of the base portion 42 of one row of staples 4 are bent or bent toward the middle portion 421 of the other row of staples 4 and are closer to the other row of staples (than the middle portion of the base portion 42 of the one row of staples 4). When the rows of staples 4 are viewed in plan, or when the staples 4 are stapled to the tissue, the both end portions 422 of the base portions 42 of two adjacent rows of staples 4 are close to each other and are shifted in the front-rear direction X (i.e., overlap each other in the front-rear direction X, or are shielded from each other in the left-right direction Y), so that the first slit S1 between adjacent staples 4 in one row of staples 4 and the second slit S2 between adjacent staples 4 in the other row of staples 4 are shifted in the front-rear direction X, and the inside and outside of the staple cannot be easily communicated with each other, and the risk of blood leakage and air leakage can be reduced for the lung operation.

(second embodiment)

The cartridge assembly of the second embodiment of the present application is similar in structure to the cartridge assembly of the first embodiment, and the same or similar parts thereof are not repeated and denoted by the same reference numerals.

As shown in fig. 19-22, cartridge assembly 302 may include a cartridge body 1, a staple pusher sheet 2, a spacer 3, staples 4, and a carrier 5. The nail bin main body 1 is provided with a nail cavity 12, the gasket 3 can be installed on a nail outlet surface 13 of the nail bin main body 1, and the gasket 3 covers a nail cavity opening on the nail outlet surface 13 side of the nail cavity 12.

Each shim 3 may cover a plurality of staple cavity openings so that each shim 3 may be penetrated by a plurality of staples 4. Each shim 3 may cover a plurality of different rows of adjacent staple cavities 12 (or, alternatively, cover a plurality of different rows of adjacent staple cavity openings), for example, each shim 3 covers two staple cavities 12, the two staple cavities 12 being different rows of staple cavities 12. When the anastomotic nails 4 are nailed in the tissue, the two anastomotic nails 4 in different rows penetrate through the gasket 3, one gasket 3 is fixed by the two anastomotic nails 4, namely 4 fixing points are used for fixing the gasket 3, so that the gasket 3 is fully contacted with the tissue, the stress is balanced, the gasket 3 is prevented from deflecting when being contacted with the tissue, and the phenomena of blood seepage and air leakage are effectively avoided.

The plurality of staple cavities 12 (a plurality of which are not limited to two as shown in figures 20-22, for example) covered by each shim 3 may comprise different rows of staple cavities 12 located on one side of the channel 11.

In addition, one shim 3 can also cover a whole row of nail cavities 12 on one side of the channel 11 or all nail cavities 12 on one side of the channel 11. In other words, one side of the gate 11 may have only one or two shims 3.

As shown in fig. 21 and 22, the gasket 3 may include a first plate portion 31 and a second plate portion 32, the first plate portion 31 being provided with two through holes 33 that cooperate with the staples 4, and the second plate portion 32 being provided with two through holes 33 that cooperate with another staple 4. First plate portion 31 is penetrated by one staple 4 of one row, and second plate portion 32 is penetrated by one staple 4 of the other row. The first plate portion 31 and the second plate portion 32 are offset in the front-rear direction X and the left-right direction Y, and the first plate portion 31 and the second plate portion 32 may be integrally formed.

In one possible embodiment, the plurality of pads 3 may be connected together when the staples 4 are unfired, and the plurality of pads 3 may be connected by a frangible connection, for example, the frangible connection may be a plurality of connections spaced apart (e.g., connections in a dotted or dashed line configuration). When the staples 4 are fired, the connection portions may be broken and the connected pads 3 may be torn apart into pieces.

In another possible embodiment, a plurality of pads 3 may be connected together (i.e. one pad 3 for a plurality of staples 4, even all staples 4 of the entire cartridge), preferably when pads 3 are made of a resorbable, dissolvable or degradable material.

As shown in fig. 21, when a plurality of staples 4 pass through one spacer 3, the area of the spacer 3 is increased, and the area of the spacer 3 in contact with the tissue is increased. Therefore, for the lung operation, the phenomena of blood leakage and air leakage can be effectively avoided. In addition, this also facilitates the mounting of the spacer 3 to the cartridge body 1.

In addition, when one gasket 3 is used for a plurality of anastomotic nails 4 to pass through, the cutting steps during the formation of the gasket can be reduced, the gasket can be conveniently and quickly and accurately arranged on the nail outlet surface 13 of the nail bin main body 1 in an aligned mode, and the production and assembly costs of the gasket and the nail bin assembly can be reduced.

As shown in fig. 23-25, in one possible embodiment, the staple abutment seat 304 may be sleeved with the end effector sleeve 6, and the end effector sleeve 6 may include a first sheet portion 61 and a second sheet portion 62, the first sheet portion 61 being located between the magazine seat 303 and the staple abutment seat 304, the first sheet portion 61 being opposite to the staple ejection face 13. The first sheet 61 may be made of an absorbable, dissolvable or degradable material, and an example of the absorbable material may be polyglycolic acid. The second tab 62 may be located on the side and above the anvil 304. The first sheet portion 61 and the second sheet portion 62 may be formed into a long sleeve shape and fit over the nail abutting seat 304.

The surface of the staple pushing seat 304 facing the staple outlet surface 13 is a staple pushing surface, a staple pushing seat groove 3041 is formed on the staple pushing surface, and after the staples 4 are fired and the staple legs 41 pierce through the tissue, the staple legs 41 can be pressed against the staple pushing seat groove 3041 to be bent, so that the staples 4 are stapled on the tissue.

After the staples 4 are fired, the staple legs 41 may pass through the first sheet portion 61 and the staple legs 41 may be pressed against the staple abutment groove 3041 to be bent, such that the staples 4 and the first sheet portion 61 are stapled together on the tissue. The first sheet 61 prevents the tissue from bleeding and leaking. The first sheet portion 61 and the second sheet portion 62 may be sewn together by a thread, and after the first sheet portion 61 is stapled to the tissue, the first sheet portion 61 and the second sheet portion 62 may be separated by removing the thread, and the second sheet portion 62 may be taken out of the body. In addition, the first sheet portion 61 and the second sheet portion 62 may be connected by a breakable connection portion, for example, the breakable connection portion may be a plurality of connection portions arranged at intervals (for example, a connection portion of a dotted line or a dotted line structure).

It will be appreciated that the first and

second sheet portions

61, 62 need not be made of the same material.

The end effector sleeve 6 has the effect similar to that of the gasket 3, the end effector sleeve 6 can increase the contact area of the anastomotic nails 4 and tissues, the tissues are prevented from being crushed by the anastomotic nails under large suturing force, and then the risk of blood seepage and air leakage can be reduced. The end effector sheath 6 may be sleeved on the anvil 304. In addition, the end effector sleeve 6 may alternatively or additionally be sleeved on the cartridge seat 303 with the cartridge assembly 302 installed, for example, the end effector sleeve 6 may be sleeved on the cartridge seat 303 with the cartridge assembly 302 installed without a spacer as shown in fig. 3 to 5.

It will be appreciated that the end effector is not limited to the form shown in the drawings, for example, the end effector may also be curved or looped as in some prior art. Thus, the staple ejection face may also be curved or annular.

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

1. A staple cartridge assembly, comprising:

a shim mounted to the nail exit face and covering the nail cavity opening;

2. The staple cartridge assembly of claim 1, wherein said spacer is sheet-like.

3. The staple cartridge assembly of claim 1 or 2, wherein said spacer has a thickness to width ratio of 1: 5 to 1: 20.

4. the staple cartridge assembly of claim 3, wherein said spacer has a thickness to width ratio of 1: 8 to 1: 15.

5. the staple cartridge assembly of claim 1 or 2, wherein said spacer has a thickness of 0.1 mm to 0.5 mm.

6. The cartridge assembly of claim 1, wherein a straight line passing through a gap between the staples on the same side of the channel and adjacent in the fore-aft direction always intersects at least one of the staples on the same side of the channel.

7. The staple cartridge assembly of claim 1, wherein said staple cartridge assembly comprises a plurality of said pads, a line passing through a gap between said pads that are on the same side of said channel and adjacent in said fore-aft direction always intersects at least one of said pads on the same side of said channel.

8. The staple cartridge assembly of claim 7, wherein a width of a gap between said spacers that are adjacent in said fore-aft direction is less than 1/15 for a length of a single spacer; and/or

9. The cartridge assembly of claim 1, wherein the base portion is curved or V-shaped or W-shaped, and in the two rows of staples on the same side of the trough, both end portions of the base portion of the staple in one row are bent toward the staples in the other row to be close to the staples in the other row, and the cross section of the staple cavity is adapted to the base portion so as to guide the staples to move in the thickness direction of the cartridge assembly.

10. The staple cartridge assembly of claim 1, wherein said two rows of said staple cavities on the same side of said channel are staggered.

11. The staple cartridge assembly of claim 1, wherein said staple cartridge assembly comprises a plurality of said spacers, each of said spacers covering a plurality of said staple cavity openings.

12. The staple cartridge assembly of claim 11, wherein the plurality of staple cavity openings covered by each spacer comprises a different row of staple cavity openings located on one side of said channel.

13. The staple cartridge assembly of claim 11, wherein one shim covers an entire row of staple cavities on one side of said channel or covers all of the staple cavities on one side of said channel.

14. The cartridge assembly of claim 11, wherein the spacer includes a first plate portion and a second plate portion, the first plate portion and the second plate portion being offset in the front-to-rear direction and the left-to-right direction of the cartridge assembly, the first plate portion and the second plate portion being integrally formed, the first plate portion being provided with two through holes for engagement with one staple, the second plate portion being provided with two through holes for engagement with another staple.

15. The staple cartridge assembly of claim 1, wherein said staple cartridge assembly comprises a plurality of said spacers, two or more of said spacers being connected together by a frangible connection.

16. The staple cartridge assembly of claim 1, comprising a plurality of said spacers, wherein a staple exit surface of said staple cartridge body comprises a groove disposed about said staple cavity opening, said spacers being mounted to said staple exit surface by an interference fit with said groove.

17. The staple cartridge assembly of claim 1, wherein said spacer is affixed to said staple ejection surface.

18. The staple cartridge assembly of claim 1, wherein said spacer has through holes for said staple legs to pass through.

19. A surgical instrument comprising an end effector comprising a jaw assembly, the jaw assembly comprising: the nail bin seat is used for installing the nail bin assembly; and a staple abutting seat which can be opened and closed relative to the staple cartridge seat,

the end effector is characterized by further comprising an end effector sleeve which can be sleeved on the nail bin seat and/or the nail abutting seat.

20. The surgical instrument of claim 19, wherein the end effector further comprises the staple cartridge assembly mounted to the staple cartridge mount, the staple cartridge assembly being the staple cartridge assembly of any one of claims 1-18; the end effector is sleeved on the nail bin assembly and the nail bin seat.

21. The surgical instrument of claim 19, wherein the end effector sleeve comprises a first piece and a second piece, the first piece being detachably connected to the second piece, the first piece being positioned between the cartridge seat and the staple seat when the end effector sleeve is sleeved on the cartridge seat and/or the staple seat.

22. The surgical instrument of claim 21, wherein the first and second panels are sewn together with a thread, the first and second panels are separable by removal of the thread, or the first and second panels are connected together with a frangible connection.

23. The surgical instrument of claim 19, wherein the end effector sleeve is sleeved over the staple holder,

the end effector further comprises a staple cartridge assembly mounted to the cartridge mount, the staple cartridge assembly of any one of claims 1-18.