CN218943409U

CN218943409U - Staple cartridge assembly and surgical instrument

Info

Publication number: CN218943409U
Application number: CN202222557817.1U
Authority: CN
Inventors: 王凯
Original assignee: Reach Surgical Inc
Current assignee: Reach Surgical Inc
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-05-02
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a nail bin assembly and a surgical instrument, and belongs to the field of medical instruments. The cartridge assembly includes: the nail pushing device comprises a nail bin, wherein a plurality of nail pushing devices distributed along the extending direction are arranged in the nail bin; a cutting knife; the pushing part can be connected with the cutting knife, and the cutting knife and the pushing part can synchronously move from the proximal end to the distal end along the extending direction of the nail bin; in the moving process, the pushing part can push at least part of the nail pusher at the corresponding position to extend out of the nail bin; at least one limit structure is arranged on at least one of the nail bin and the pushing part, and the limit structure can enable at least one nail pusher adjacent to one side of the pushing part at the proximal end to be in a state of at least partially extending out of the nail bin. The utility model solves the problems that when the existing surgical instrument is used for cutting and suturing tissues, the tissues are easy to slip and the titanium nails are formed poorly.

Description

Staple cartridge assembly and surgical instrument

Technical Field

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

Background

The surgical instrument is used as a hand-held surgical instrument for cutting and suturing tissues, and the main working principle is that titanium nails are used for separating and anastomosing/connecting/suturing tissues, so that bleeding from soft tissues can be reduced or eliminated in the process of cutting the tissues. The surgical instrument includes a handle assembly, a transmission assembly, and an end effector. Wherein, the end effector includes nail storehouse subassembly and supports the nail seat, and the nail storehouse subassembly includes slider, staple pusher and cutting knife, is provided with the spout that can make the cutting knife pass through on the nail storehouse in the nail storehouse subassembly, is provided with trigger, button or the push button that is used for controlling the cutting knife on the handle subassembly. When the device works, tissues are placed between the nail bin assembly and the nail propping seat, the nail propping seat of the end effector is pivoted to the side of the nail bin assembly to clamp the tissues by pulling the trigger, and after the tissues are clamped, the push button is triggered to control the cutting knife to move along the sliding groove of the nail propping seat so as to cut off the tissues; the cutting knife and the sliding block translate synchronously, the sliding block pushes the nail pusher to lift from the nail bin, and the nail pusher pushes the titanium nails to be implanted into tissues to realize tissue suturing.

At present, the sliding block pushes the nail pusher to realize the movement and the forming of the titanium nails, and the sliding block continuously moves to provide a supporting effect for the nail pusher at the corresponding position. When the titanium nails are in suture molding, the corresponding nail pusher is effectively supported by the sliding block. The titanium nails after suture molding have elastic rebound tendency, and along with the leaving of the sliding blocks, the corresponding nail pusher loses the support of the sliding blocks and falls back into the nail bin, tissues are only compressed on the surface of the nail bin, and when the tissues are operated, the tissues are easy to slide in the pushing direction of the cutting knife on the surface of the nail bin; meanwhile, in the state, the rebound force of the titanium nails is not beneficial to the cohesion force of the titanium nails, so that the titanium nails are poorly formed, and even tissue bleeding is caused.

Disclosure of Invention

The utility model aims to solve the technical problems that when the existing surgical instrument is used for cutting and suturing tissues, the tissues are easy to slip and the titanium nails are formed poorly.

Aiming at the technical problems, the utility model provides the following technical scheme:

a staple cartridge assembly comprising:

the nail pushing device comprises a nail bin, wherein a plurality of nail pushing devices distributed along the extending direction are arranged in the nail bin;

a cutting knife;

the pushing part can be connected with the cutting knife, and the cutting knife and the pushing part can synchronously move from the proximal end to the distal end along the extending direction of the nail bin; in the moving process, the pushing part can push at least part of the nail pusher at the corresponding position to extend out of the nail bin;

at least one limit structure is arranged on at least one of the nail bin and the pushing part, and the limit structure can enable at least one nail pusher adjacent to one side of the pushing part at the proximal end to be in a state of at least partially extending out of the nail bin.

In some embodiments of the present utility model, the limiting structure is connected to one end of the pushing portion facing the proximal end, and the limiting structure can move synchronously with the pushing portion, and the limiting structure can support at least one staple pusher and the pushing portion to support the staple pusher that extends out of the staple cartridge to be flush with each other.

In some embodiments of the present utility model, a chute suitable for moving a cutting knife is provided in the nail bin, the pushing portion includes a connecting plate and two wedge blocks which are opposite to each other and are disposed on the connecting plate at intervals, a stop block is provided between the two wedge blocks, the cutting knife is pushed against the proximal end of the stop block, when the cutting knife slides along the proximal end to the distal end of the chute, the stop block is pushed against the connecting plate to enable the wedge blocks and the cutting knife to move synchronously, and the limiting structure is connected with or integrally formed with the wedge blocks.

In some embodiments of the present utility model, a guide surface and a support surface are sequentially disposed on a side of the wedge block facing the nail pusher, a limit support surface is disposed on a side of the limit structure facing the nail pusher, and the limit support surface and one end of the support surface, which is far away from the guide surface, are connected together and are disposed in a flush manner.

In some embodiments of the present utility model, the staple cartridge is provided with a plurality of staple ejection holes, the staple ejection holes are used for accommodating a staple pusher, the pusher pushes the staple pusher to extend out of the staple ejection holes, and staples in the staple pusher move into tissue outside the staple cartridge along the staple ejection holes.

In some embodiments of the present utility model, the limiting structure includes a first engaging portion provided on the staple pusher and a second engaging portion provided on the staple cartridge, and when the staples are moved to the tissue, the first engaging portion and the second engaging portion are engaged with each other.

In some embodiments of the present utility model, the first engaging portion is at least one snap protrusion disposed on the staple pusher, and the second engaging portion is a limiting step surface disposed in the staple cartridge; after the suturing nail moves into tissues, the limiting step surface stops the buckling protrusions from moving.

In some embodiments of the present utility model, the latch protrusions are disposed on opposite side walls of the staple pusher along a width direction of the staple cartridge, and the limit step surfaces are disposed at corresponding positions of opposite side walls of the staple cartridge overlapping the staple pusher.

In some embodiments of the present utility model, the protruding height of the snap-fit protrusion on the nail pusher gradually decreases from far to near toward the nail-out hole, the limiting step surface includes a first limiting surface, a transition surface, and a second limiting surface, which are sequentially connected from far to near toward the nail-out hole, and the snap-fit protrusion can be abutted to a connection position between the transition surface and the second limiting surface.

The present utility model also provides a surgical instrument comprising: the nail cartridge assembly and the nail propping seat can pivot relative to the nail cartridge assembly or the nail cartridge assembly can pivot relative to the nail propping seat.

Compared with the prior art, the technical scheme of the utility model has the following technical effects:

in the nail bin assembly and the surgical instrument provided by the utility model, the cutting knife and the pushing part are adopted to realize tissue cutting in the process of moving the cutting knife and the pushing part from the proximal end to the distal end along the nail bin, and the pushing part is used for pushing the nail pusher to extend out of the nail bin, so that the nail pusher pushes the suturing nail into the tissue to realize suturing; the limiting structure provides limiting support function for at least one nail pusher adjacent to the pushing part on the side of the proximal end, and limits rapid falling of the nail pusher, so that the nail pusher can fall back in a delayed manner or can not fall back any more; the stitching nails are prevented from falling back into the nail bin under the elastic rebound state, the stitching nails are prevented from increasing in rebound force, the stitching nails form holding force on tissues, and the tissue bleeding is prevented; the ejector part extends out of the surface of the nail bin, so that the friction force on the surface of the nail bin is increased, and the tissue slippage during tissue operation is reduced.

Drawings

The objects and advantages of the present utility model will be better understood by describing in detail preferred embodiments thereof with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of one embodiment of a surgical instrument of the present utility model;

FIG. 2 is an exploded view of one embodiment of an end effector of the surgical instrument of the present utility model;

FIG. 3 is a schematic view of a first embodiment of a staple cartridge assembly of the surgical instrument of the present utility model;

FIG. 4 is a schematic view of a second embodiment of a staple cartridge assembly of the surgical instrument of the present utility model;

FIG. 5 is a schematic view of the pusher portion and one embodiment of a cutting knife of the cartridge assembly of FIG. 4;

FIG. 6 is a schematic view of the configuration of one embodiment of the cutting knife and firing member of the cartridge assembly shown in FIG. 4;

FIG. 7 is a schematic view of the pusher and one embodiment of the staple cartridge assembly of FIG. 4;

FIG. 8 is a schematic view of a third embodiment of a staple cartridge assembly of a surgical instrument of the present utility model in an initial state;

FIG. 9 is a schematic structural view of a third embodiment of a staple cartridge assembly of the surgical instrument of the present utility model in a fired state;

FIG. 10 is a cross-sectional view of the cartridge assembly shown in FIG. 9 at A-A;

FIG. 11 is a top view of a staple cartridge of the staple cartridge assembly shown in FIG. 9;

FIG. 12 is a cross-sectional view of the staple cartridge assembly of FIG. 11 at C-C and a partial enlarged view at D;

FIG. 13 is a perspective view of one embodiment of a staple pusher having a spacing structure of the staple cartridge assembly of the present utility model;

FIG. 14 is a side view of the staple pusher of the staple cartridge assembly shown in FIG. 13;

FIG. 15 is a schematic view of the surgical instrument of the present utility model in use;

FIG. 16 is a schematic view of the staple formation shown in FIG. 15;

FIG. 17 is a schematic view of the structure of one embodiment of the surgical instrument of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In various embodiments of the present utility model, "distal" refers to the end/side of the surgical instrument that is remote from the operator when operated, and "proximal" refers to the end/side of the surgical instrument that is proximate to the operator when operated.

Fig. 1 is a schematic view of one embodiment of a surgical instrument 100 provided by the present utility model. The illustrated embodiment is an endoscopic instrument and, in general, an example of a surgical instrument 100 described herein is an endoscopic surgical cutting anastomosis instrument. However, it should be noted that surgical instrument 100 may also be a non-endoscopic surgical cutting anastomosis instrument, such as an open surgical instrument for open surgery.

Specifically, fig. 1 shows a surgical instrument 100 that includes an end effector 10, a transmission assembly 20, and a handle assembly 30, the transmission assembly 20 including an inner core 21 and a tubular housing 22, the handle assembly 30 including a trigger 31 and a handle body 32. Wherein the handle assembly 30 is adapted to allow an operator to manipulate the surgical instrument 100, the handle assembly 30 may control movement of the end effector 10 via the transmission assembly 20 to perform surgical procedures, such as clamping/closing, stapling/stapling, cutting, etc. of tissue. The handle assembly 30 includes a handle body 32 that may be capable of being grasped by a user in a conventional manner. In a particular embodiment, the surgical instrument 100 is operated to close and/or fire the end effector 10 by a trigger 31; in one particular embodiment, the surgical instrument 100 may also be configured to manipulate the end effector 10 to close and/or fire by pushing a button, push button, or the like provided on the handle body 32 to cause the end effector 10 to perform cutting and stapling operations; in a specific embodiment, the surgical instrument 100 can also be operated to open the jaws of the end effector 10 by means of a trigger 31, push button, or the like provided on the handle body 32 to release tissue. The transmission assembly 20 is elongate and tubular in shape defining a longitudinal axis, and the transmission assembly 20 transmits the driving force of the handle assembly 30 to the end effector 10 at the distal end of the surgical instrument 100.

Fig. 2 is an exploded view of one embodiment of the end effector 10 of the surgical instrument 100 of the present utility model. The end effector 10 includes a cartridge assembly 11 and a anvil 12 attached to a distal end of a surgical instrument 100, the cartridge assembly 11 and anvil 12 being relatively closeable to form a jaw for grasping tissue. In a particular embodiment, the abutment 12 of the end effector 10 can pivot toward the cartridge assembly 11 until the jaws of the end effector 10 are closed to grasp tissue; the anvil 12 is pivoted away from the cartridge assembly 11 until the jaws of the end effector 10 are opened to release tissue. In yet another specific embodiment, the cartridge assembly 11 of the end effector 10 can be pivoted toward the anvil 12 until the jaws of the end effector 10 are closed to grasp tissue.

The transmission assembly 20 includes a tubular housing 22 defining a longitudinal axis; an inner core 21 is disposed within the tubular housing 22, a movable firing bar (not shown in FIG. 2) is disposed within the inner core 21, the firing bar having a proximal end coupled to an output end of a drive mechanism within the handle assembly 30 and a distal end coupled to a firing member 122 of the end effector 10 for transmitting a driving force of the drive mechanism to the firing member 122.

Fig. 3 is a schematic view of a first embodiment of a cartridge assembly 11 of a surgical instrument 100 of the present utility model. The nail bin assembly 11 comprises a nail bin 112, a cutting knife 115, a pushing part 113 and at least one limiting structure, wherein a plurality of nail ejectors 114 distributed along the extending direction are arranged in the nail bin 112; the cutter 115 may be connected to the pushing portion 113, and the cutter 115 and the pushing portion 113 may be synchronously movable from the proximal end to the distal end along the extension direction of the staple cartridge 112; in the moving process, the pushing part 113 can push at least part of the nail pusher 114 at the corresponding position to extend out of the nail bin 112; at least one of the staple cartridge 112 and the pushing portion 113 is provided with a limiting structure, and the limiting structure can be in a state of at least partially extending out of the staple cartridge 112 with at least one ejector 114 adjacent to the pushing portion 113 on the proximal side.

Cartridge assembly 11 is driven by transport assembly 20 for operation. When the user activates the handle assembly 30, the transmission assembly 20 drives the cutter 115 and the pusher 113 to move distally along the staple cartridge 112 from the proximal end, the cutter 115 effecting tissue cutting during movement, and the pusher 113 pushing at least a portion of the staple pusher 114 out of the staple cartridge 112 during movement, the staple pusher 114 pushing staples 1142 (including but not limited to titanium staples) into the tissue to effect stapling (as shown in fig. 15); the pusher 113 and cutter 115 will then continue to move distally. A pusher 114 adjacent to the pushing portion 113 on the proximal side, i.e., the pusher 114 below the staples 1142 which have entered the tissue to be formed, is the following pusher 114; while the pusher 114 being supported by the pusher 113, i.e., the pusher 114 being under the staples 1142 of the stapled tissue, is the leading pusher 114. The subsequent pusher 114 will fall back due to the loss of support from the pusher 113, and at this time, the stop structure provides support to the pusher 114 for at least one of the staples 1142 to enter the tissue, limiting its rapid fall back and allowing it to fall back with a delay or no longer fall back. In one embodiment, the spacing structure provides temporary spacing support, i.e., the pusher 113 provides support to the forward staple pusher 114 and the spacing structure provides spacing support to at least one adjacent, rearward staple pusher 114. The limiting structure moves synchronously along with the pushing part 113, after the suturing nail 1142 in the front nail pusher 114 completes suturing, the pushing part 113 drives the limiting structure to move forwards continuously, the limiting structure leaves the rear nail pusher 114, the rear nail pusher 114 loses the limiting supporting function, but at least one suturing nail 1142 exists between the suturing nail 1142 of the rear nail pusher 114 and the tissue to be sutured, and further, the time delay falling back is formed, so that the influence on the suturing nail 1142 is reduced; in another embodiment, the spacing structure provides a durable spacing support, i.e., whether or not the pusher 113 is moved, the spacing structure provides a continuous spacing support to the subsequent staple pusher 114, thereby preventing further fallback and reducing the impact on the staples 1142.

With the above-mentioned cartridge assembly 11, in the process that the cutter 115 and the pushing part 113 move from the proximal end to the distal end along the cartridge 112, the cutter 115 cuts tissue, the pushing part 113 pushes the staple pusher 114 to extend out of the cartridge 112, and the staple pusher 114 pushes the staples 1142 into the tissue to realize stapling; the pushing part 113 provides a supporting function for the front nail pusher 114, and the limiting structure provides a limiting supporting function for at least one rear nail pusher 114, so that the rear nail pusher 114 is limited to fall back quickly, and is delayed to fall back or no longer fall back; the staples 1142 are prevented from falling back into the staple cartridge 112 rapidly in the state of elastic rebound, the rebound force of the staples 1142 is prevented from being increased, the staples 1142 are facilitated to form holding force on the tissues, and the tissue bleeding is prevented; the staple pusher 114 partially extends beyond the cartridge surface, increasing the friction on the cartridge surface and reducing tissue slippage during tissue manipulation.

In a specific embodiment, referring to fig. 11, the nail bins 112 of the nail bin assembly 11 are all symmetrical, two nail bin cavities arranged in parallel in the width direction are arranged in the nail bins 112, a plurality of uniformly distributed nail outlet holes are formed in each nail bin cavity, and a plurality of nail outlet holes, such as three columns, are staggered in each nail bin cavity; the nail outlet holes on the two nail bin cavities are arranged in mirror symmetry along the central axis of the length direction. Each nail-ejecting hole is provided with a nail pusher 114 in one-to-one correspondence, one side of the nail pusher 114 facing the nail-ejecting hole is provided with a suture nail 1142, and the nail pusher 114 implants the suture nail 1142 into tissues to realize suture.

In a specific embodiment, the cutting knife 115 is positioned between two cartridge cavities and the firing member 122 drives the cutting knife 115 to move along the length of the cartridge cavities. The pushing part 113 provides supporting function for the parallel staple pushers 114 in the two staple cartridge cavities at the same time, and the cutting knife 115 is connected with the pushing part 113 and moves synchronously.

In a specific embodiment, a plurality of independent subchambers are arranged in the staple cartridge chamber, each subchamber is internally provided with a staple pusher 114, each staple pusher 114 comprises a wedge-shaped base and a pushing seat arranged above the wedge-shaped base, the wedge-shaped base can climb along the pushing part 113 through a wedge-shaped surface, the staples 1142 are positioned on one end of the pushing seat far away from the wedge-shaped base, and when the wedge-shaped base climbs on the pushing part 113, the pushing seats are driven to extend out of the staple cartridge chamber so as to implant the staples 1142 into tissues for suturing.

In a specific embodiment, two opposite ends of the bottom surface of the wedge-shaped base are respectively provided with a first wedge surface and a second wedge surface, wherein the first wedge surface is used for climbing along the pushing portion 113, and the second wedge surface is used for reducing friction force when the pushing portion 113 leaves. The included angle between the first wedge-shaped surface and the extended line of the bottom surface is larger than the included angle between the second wedge-shaped surface and the extended line of the bottom surface, the inclined length of the first wedge-shaped surface is larger than that of the second wedge-shaped surface, and the distance between the second wedge-shaped surface and the first wedge-shaped surface gradually increases from the bottom surface to the top surface.

In a particular embodiment, the cutting blade 115 includes a handle coupled to the pushing portion 113 and a blade having a cutting edge disposed toward the distal end of the cartridge assembly 11.

To simplify the structure of the cartridge assembly 11, in an alternative embodiment, a limiting structure is connected to the pushing portion 113 at one end thereof toward the proximal end, the limiting structure can move synchronously with the pushing portion 113, and the limiting structure can support at least one pusher 114 to be flush with the pusher 114 supported by the pushing portion 113 and extending to the exterior of the cartridge 112. By arranging the limiting structure at one end of the limiting structure towards the proximal end, after the pushing part 113 leaves the rear staple pusher 114, the limiting structure continues to provide a limiting supporting function for the rear staple pusher 114, so that the front staple pusher 114 supported by the pushing part 113 is arranged flush with the rear at least one staple pusher 114 supported by the limiting structure. The limiting structure provides temporary limiting support for the staple pusher 114 which is separated due to the forward movement of the pushing portion 113, the limiting structure can move synchronously along with the pushing portion 113, and after the limiting structure is carried away by the pushing portion 113, the staple pusher 114 forms delayed falling back, so that the effect of stitching is reduced or avoided.

In a specific embodiment, the pushing portion 113 is detachably connected to the limiting structure, such as a snap connection, an adhesive connection, or the like.

Fig. 4 is a schematic view of a second embodiment of a staple cartridge assembly 11 of a surgical instrument 100 of the present utility model. Fig. 4 is different from fig. 3 in that the pushing portion 113 and the limiting structure in fig. 4 are integrally formed. Through setting up integrated into one piece structure, can simplify the structure, guarantee the supporting stability.

In a specific embodiment, the nail bin assembly 11 further includes a pushing sliding rail, the pushing sliding rail extends along the length direction of the nail bin cavity, the pushing portion 113 is a pushing sliding block, and the pushing sliding block and the limiting structure both slide along the pushing sliding rail.

FIG. 5 is a schematic view of one embodiment of the pusher portion 113 and the cutting blade 115 of the cartridge assembly 11 of FIG. 4; FIG. 6 is a schematic view of one embodiment of the cutting knife 115 and firing member 122 of the cartridge assembly 11 of FIG. 4; fig. 7 is a schematic view of an embodiment of pusher 113 and staple pusher 114 of staple cartridge assembly 11 shown in fig. 4. In an alternative embodiment, a chute suitable for moving the cutter 115 is provided in the staple cartridge 112, the pushing portion 113 includes a connecting plate and two opposite wedge blocks arranged on the connecting plate at intervals, a stop block is provided between the two wedge blocks, the cutter 115 is pushed against the proximal end of the stop block, and when the cutter 115 slides along the proximal end to the distal end of the chute, the pushing block makes the connecting plate drive the wedge blocks to move synchronously with the cutter 115, and the limiting structure is connected with the wedge blocks or integrally formed. When the firing member 122 drives the cutter 115 to slide along the proximal end to the distal end of the chute, the pushing block enables the connecting plate to drive the wedge block and the cutter 115 to move synchronously, so that the cutter 115 and the staple pusher 114 supported by the wedge block operate synchronously, and the wedge block drives the limiting structure to move synchronously, so that the wedge block and the limiting structure provide a limiting supporting function synchronously.

In order to avoid fluctuation caused by the fall between the wedge block and the limiting structure, in an alternative embodiment, the wedge block is sequentially provided with a guide surface and a supporting surface towards one side of the nail pusher 114, the limiting structure is provided with a limiting supporting surface 1131 towards one side of the nail pusher 114, and the limiting supporting surface 1131 and one end, far away from the guide surface, of the supporting surface are connected together and are arranged in parallel. The staple pusher 114 moves along the guide surface and gradually rises to the support surface, the support surface provides stable support, the limiting support surface 1131 is connected with the support surface and is arranged in a flush manner, and the limiting structure can provide stable support when the limiting support surface 1131 is used for supporting the staple pusher 114 instead of the support surface.

In a specific embodiment, the limiting structure is a limiting plate, the limiting plate comprises a limiting supporting surface 1131, the limiting supporting surface 1131 can support at least one nail pusher 114, the limiting supporting surface 1131 and the supporting surface are of an integrated structure, and smooth transition from the supporting surface to the limiting supporting surface 1131 of the nail pusher 114 is ensured.

In a specific embodiment, the limiting structure is a groove structure, the groove structure includes a substrate and side walls extending from two opposite side edges of the substrate, the same end faces of the substrate and the side walls are connected with the pushing portion 113, the side walls are respectively located in the nail bin cavities on two sides, each side wall is connected with a wedge block, and the side walls on two sides are far away from the end faces of one end of the substrate to limit the supporting face 1131 for supporting the nail pusher 114. Through setting up to groove structure, can improve the stability of spacing holding surface 1131, promote limit structure and wedge's wholeness simultaneously, promote the synchronism. The length of the side walls is set according to the number of supporting staple pushers 114, and typically at least one staple pusher 114 is supported per side wall.

In an alternative embodiment, the staple cartridge 112 is provided with a plurality of staple ejection holes for receiving the staple pusher 114, and the pusher 113 pushes the staple pusher 114 out of the staple ejection holes, along which staples 1142 in the staple pusher 114 are moved into the tissue outside the staple cartridge 112. The cartridge 112 is disposed on a cartridge mount 111, the cartridge mount 111 is coupled to the transport assembly 20, and the cartridge 112 is drivable by the transport assembly 20 for operation. The chute is disposed in the staple cartridge 112, the cutting blade 115 is movable along the staple cartridge 112, the staple outlet is adapted to receive staples 1142 and a staple pusher 114, the staple 1142 is mounted on a side of the staple pusher 114 facing the staple outlet, and the staple pusher 114 is adapted to implant the staples 1142 into tissue to effect stapling. The cartridge cavity is disposed within the cartridge 112, and the cartridge 112 is a disposable component that is removably attached within the cartridge base 111. In other alternative embodiments, cartridge base 111 is fixedly coupled to cartridge 112 or integrally formed therewith as a component that is removably coupled to delivery assembly 20.

In a specific embodiment, the cartridge base 111 is formed as an open housing structure with a U-shaped or semicircular cross section, which is connected to the distal end of the transmission assembly 20, and the cartridge 112 is inserted into the cartridge base 111 by fastening or the like. The staple cartridge 112 is formed in the form of an elongate housing extending along the longitudinal axis of the surgical instrument 100, a side of the housing base 111 being adapted to engage tissue, the contact surface of the staple cartridge 112 adapted to engage tissue being provided with a chute extending along the proximal to distal end of the staple cartridge 112, the chute being located intermediate the upper surface of the staple cartridge 112; the chute is adapted for the passage of a cutting knife 115 to cut tissue clamped between the contact surface and the staple housing 121 of the staple holder 12 along the proximal to distal end of the staple cartridge 112.

FIG. 8 is a schematic view of a third embodiment of a staple cartridge assembly 11 of a surgical instrument 100 of the present utility model in an initial configuration; fig. 9 is a schematic structural view of a third embodiment of a cartridge assembly 11 of a surgical instrument 100 of the present utility model in a fired state. In an alternative embodiment, the limiting structure includes a first engaging portion 1141 disposed on the staple pusher 114 and a second engaging portion 1121 disposed on the staple cartridge 112, and when the staples 1142 are moved to the tissue, the first engaging portion 1141 and the second engaging portion 1121 are engaged with each other. After the pushing part 113 pushes the staple pusher 114 to extend out of the staple cartridge 112, the staples 1142 supported by the staple pusher 114 enter the tissue, at this time, the first clamping part 1141 of the staple pusher 114 and the second clamping part 1121 of the staple cartridge 112 realize clamping connection, and when the pushing part 113 continues to move forward, the clamping connection keeps the relative positions of the staple pusher 114 and the staple cartridge 112 unchanged, so that the staple pusher 114 cannot fall back, and further the supporting and limiting effects on the staples 1142 are ensured.

FIG. 10 is a cross-sectional view of the cartridge assembly 11 shown in FIG. 9 at A-A; FIG. 11 is a top view of the staple cartridge 112 of the staple cartridge assembly 11 shown in FIG. 9; FIG. 12 is a cross-sectional view of the staple cartridge 112 of the staple cartridge assembly 11 shown in FIG. 11 at C-C and a partial enlarged view at D. In an alternative embodiment, the first engaging portion 1141 is at least one engaging protrusion disposed on the staple pusher 114, and the second engaging portion 1121 is a limiting step surface disposed in the staple cartridge 112; after staple 1142 is moved into the tissue, the stop step surface blocks the snap tab from moving.

In a specific embodiment, the fastening protrusion is a spring plate arranged on the nail pusher 114, the spring plate extends along the height direction of the nail pusher 114, the top end of the spring plate is connected to the nail pusher 114, the bottom end of the spring plate keeps a certain distance from the nail pusher 114, when the nail pusher 114 moves along the nail outlet hole, the limiting step surface presses the bottom end of the spring plate, and the bottom end of the spring plate is retracted, namely moves towards one side of the nail pusher 114; the pressing force is removed or reduced by the limiting step surface, the bottom end of the elastic sheet is reset, and the elastic sheet is clamped with the limiting step surface to limit the nail pusher 114 to fall back. In other alternative embodiments, the snap-fit protrusions are made of elastic material, and the snap-fit protrusions are protruding arc-shaped sheets, wedge-shaped sheets or trapezoid-shaped sheets. The inclined planes of the wedge-shaped thin sheet and the trapezoid thin sheet are matched with the step surface of the limit step surface.

FIG. 13 is a perspective view of one embodiment of a staple pusher 114 having a spacing structure of the staple cartridge assembly 11 of the present utility model; fig. 14 is a side view of staple pusher 114 of staple cartridge assembly 11 shown in fig. 13. In an alternative embodiment, the opposite side walls of the nail pusher 114 along the width direction of the nail bin 112 are provided with buckling protrusions, and the corresponding positions of the opposite side walls of the nail bin 112 and the opposite side walls of the nail pusher 114 are provided with limiting step surfaces. By symmetrically providing the snap projections on the staple pusher 114, a stable connection can be formed when the snap projections snap-connect with the stop step surfaces in the staple cartridge 112 to provide stable support for the staple 1142 by the staple pusher 114.

In a specific embodiment, two limiting step surfaces are respectively arranged on two side walls of the opposite sides of the nail bin cavity in the width direction, and two buckling protrusions are respectively connected to the corresponding limiting step surfaces in a clamping mode. The width between two spacing step faces is from bottom to top and reduces earlier and then increases, and the buckle arch is when tightening up the department through spacing step face, receives the extrusion and takes place elastic deformation, then, and the buckle arch gets into spacing step face and enlarges the department, no longer receives the extrusion back and resets, and the buckle arch after the reset makes the ejector 114 by spacing step face spacing support and can't fall back.

In an alternative embodiment, the protruding height of the fastening protrusion on the nail pusher 114 gradually decreases from far to near towards the nail hole, and the limiting step surface includes a first limiting surface, a transition surface and a second limiting surface which are sequentially connected from far to near towards the nail hole, and the fastening protrusion can be abutted to the joint of the transition surface and the second limiting surface. The distance between the first spacing surfaces on both sides of the staple pusher 114 is smaller than the distance between the second spacing surfaces on both sides of the staple pusher 114, when the staple pusher 114 passes through the first spacing surfaces, the buckling protrusions are in a tightened state, and when the staple pusher 114 passes through the transition surfaces and enters the second spacing surfaces, the buckling protrusions are in a released state, so that the staple pusher 114 can only pass through the spacing step surfaces in one direction, and cannot fall back to the first spacing surfaces and the lower parts thereof again through the transition surfaces.

The limiting structure can adopt a mode of adding a limiting supporting surface 1131 on the pushing part 113, or adopting a mode of adding a first clamping part 1141 on each nail pusher 114, adding a second clamping part 1121 on the corresponding position of the nail bin 112, and clamping and connecting the first clamping part 1141 and the second clamping part 1121, or adopting a mode of combining the two, namely adding the limiting supporting surface 1131 on the pushing part 113, adding a first clamping part 1141 on each nail pusher 114, adding a second clamping part 1121 on the corresponding position of the nail bin 112, clamping and connecting the first clamping part 1141 and the second clamping part 1121, and guaranteeing the limiting and supporting effect on the following nail pusher 114 through double limiting and supporting effects.

FIG. 15 is a schematic view of the surgical instrument 100 of the present utility model in use; fig. 16 is a schematic view of the staple 1142 shown in fig. 15 formed. The present utility model also provides a surgical instrument 100 comprising: as with cartridge assembly 11 and anvil 12 described above, anvil 12 may pivot relative to cartridge assembly 11 or cartridge assembly 11 may pivot relative to anvil 12. The surgical instrument 100 described above places tissue between the cartridge assembly 11 and the anvil 12 during a surgical procedure, and when the trigger 31 of the handle assembly 30 is pulled, the anvil 12 pivots toward the cartridge assembly 11 or the cartridge assembly 11 pivots toward the anvil 12 until the jaws of the end effector 10 are closed to grasp tissue; triggering the trigger 31, firing button or push button on the handle assembly 30 to move the cutting knife 115, pushing portion 113 and spacing structure located within the cartridge assembly 11 along the proximal to distal end of the end effector 10 to effect tissue cutting and stapling, the spacing structure being capable of providing a spacing support to at least one subsequent staple pusher 114 in time as the pushing portion 113 is moved to provide support to the preceding staple pusher 114; finally, the open button on the handle assembly 30 is actuated, either to pivot the anvil 12 away from the cartridge assembly 11 or to pivot the cartridge assembly 11 away from the anvil 12, opening the jaws of the end effector 10, releasing tissue.

With the surgical instrument 100 described above, with the clamping force of the end effector 10 unchanged, the ejector 114 is supported on the surface of the partially extended staple cartridge 112 by the restraining support of the restraining structure, increasing the friction between the tissue and the surface of the staple cartridge 112, and reducing tissue slippage during tissue manipulation. The limiting structure supports rebound deformation of the suturing nail 1142 after closing molding, so that the suturing nail 1142 maintains the height of the deformed nail to reduce rebound, thereby being beneficial to increasing the holding force of the suturing nail 1142 and reducing tissue bleeding; the staple pusher 114 partially extends beyond the cartridge surface, increasing the friction on the cartridge surface and reducing tissue slippage during tissue manipulation.

In an alternative embodiment, the surgical instrument 100 includes: an end effector 10, a transmission assembly 20, and a handle assembly 30, the end effector 10 comprising a cartridge assembly 11 and a staple holder 12; the cartridge assembly 11 includes: cartridge base 111, cartridge 112, pusher 113 (or pusher 113'), pusher 114, and cutter 115; the nail propping seat 12 comprises a nail propping shell 121 and a firing member 122; the staple cartridge 112 is formed in the form of an elongate housing extending along the longitudinal axis of the surgical instrument 100, a side of the housing base 111 being adapted to engage tissue, the contact surface of the staple cartridge 112 adapted to engage tissue being provided with a chute extending along the proximal to distal end of the staple cartridge 112, the chute being located intermediate the upper surface of the staple cartridge 112; the chute is adapted for the passage of a cutting knife 115 to cut tissue clamped between the contact surface and the staple housing 121 of the staple holder 12 along the proximal to distal end of the staple cartridge 112.

When the firing member 122 drives the cutter 115 to slide along the proximal end to the distal end of the chute, the pushing block makes the connecting plate drive the wedge block of the pushing part 113 to synchronously move with the cutter 115, so that the cutter 115 and the staple pusher 114 supported by the wedge block synchronously operate, and the wedge block drives the limiting structure to synchronously move, so that the wedge block and the limiting structure synchronously provide a limiting supporting function.

The surgical instrument 100 provided in this embodiment is detachable into multiple removable sections as needed to achieve the effect that the end effector 10/disposable loading unit/delivery assembly 20/handle, etc. can be replaced. That is, the end effector 10/disposable loading unit may be mounted on the transfer assembly 20; the transmission assembly 20 may be mounted on a handle or the like.

Taking the example that the disposable loading unit may be mounted on the transfer set 20, FIG. 17 is a schematic structural view of one embodiment of a surgical instrument 100 of the present utility model. Fig. 17 shows a surgical instrument 100 comprising a handle assembly 30, a delivery assembly 20, and a disposable loading unit removably attached to the distal end of an elongate body, connected in sequence from the proximal end to the distal end. The distal end of the disposable loading unit is provided with an end effector 10. Wherein handle assembly 30 can control movement of loading unit end effector 10 via transmission assembly 20 for performing a surgical procedure.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. The above technical schemes can be combined according to the need to achieve the best technical effect. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present utility model.

Claims

1. A staple cartridge assembly, comprising:

a cutting knife;

2. A staple cartridge assembly as defined in claim 1 wherein,

the limiting structure is connected with one end, facing the proximal end, of the pushing portion, the limiting structure can move synchronously along with the pushing portion, and the limiting structure can support at least one nail pusher to be arranged along with the pushing portion in a supporting mode, and the nail pusher extends out of the nail bin in a supporting mode.

3. A staple cartridge assembly as defined in claim 2 wherein,

be provided with the spout that is suitable for the cutting knife to remove in the nail storehouse, the promotion portion includes connecting plate and two relative and interval wedge that set up on the connecting plate, be provided with the dog between two wedge, the cutting knife push against in the proximal end of dog, the cutting knife is followed when the proximal end to distal end of spout slides, push against the dog makes the connecting plate drives wedge and cutting knife synchronous movement, limit structure with wedge connection or integrated into one piece.

4. A staple cartridge assembly as defined in claim 3 wherein,

the wedge is towards nail pusher one side has set gradually guide surface and holding surface, limit structure is towards nail pusher one side is provided with spacing holding surface, spacing holding surface with the holding surface is kept away from guide surface one end links together, and the parallel and level sets up.

5. A staple cartridge assembly as defined in claim 1 or 4 wherein,

the nail bin is provided with a plurality of nail outlet holes, the nail outlet holes are used for accommodating the nail pusher, the pushing part pushes the nail pusher to extend out of the nail outlet holes, and the stitching nails in the nail pusher move into tissues outside the nail bin along the nail outlet holes.

6. The staple cartridge assembly of claim 5 wherein,

the limiting structure comprises a first clamping part arranged on the staple pusher and a second clamping part arranged on the staple cartridge, and when the staples move to tissues, the first clamping part is in clamping connection with the second clamping part.

7. The staple cartridge assembly of claim 6 wherein,

the first clamping part is at least one clamping protrusion arranged on the nail pusher, and the second clamping part is a limiting step surface arranged in the nail bin; after the suturing nail moves into tissues, the limiting step surface stops the buckling protrusions from moving.

8. The staple cartridge assembly of claim 7 wherein,

the nail pusher is provided with the buckle bulges on the side walls of the two opposite sides of the width direction of the nail bin, and the corresponding positions of the side walls of the two opposite sides of the overlap joint of the nail bin and the nail pusher are provided with the limit step surfaces.

9. The staple cartridge assembly of claim 8 wherein,

the protruding height of the buckle protrusion on the nail pusher gradually decreases from far to near towards the nail outlet, the limiting step surface comprises a first limiting surface, a transition surface and a second limiting surface which are sequentially connected from far to near towards the nail outlet, and the buckle protrusion can be abutted to the joint of the transition surface and the second limiting surface.

10. A surgical instrument, comprising:

the cartridge assembly of any one of claims 1-9 and a staple holder pivotable relative to the cartridge assembly or the cartridge assembly pivotable relative to the staple holder.