CN219763439U - Surgical instrument and end effector assembly thereof - Google Patents

Abstract

The utility model discloses a surgical instrument and an end execution assembly thereof, and belongs to the field of medical instruments. The end execution assembly comprises a nail bin assembly, wherein the nail bin assembly comprises a nail bin, a chute suitable for the movement of a cutting knife is arranged on the outer surface of the nail bin, the chute extends from the proximal end to the distal end of the nail bin and divides the nail bin into a first nail outlet area and a second nail outlet area, three rows of nail hole groups are respectively arranged in the first nail outlet area and the second nail outlet area of the nail bin, a plurality of nail hole lists are arranged in each row of nail hole group, the nail bin further comprises a plurality of groups of guide ribs between the first row of nail hole groups and the second row of nail hole groups, and a part of guide ribs or part of guide ribs extend in a direction intersecting with the extending direction of the nail holes and incline towards the second row of nail hole groups from the proximal end to the distal end. The present utility model reduces distal slippage stacking of tissue within the jaws of the end effector assembly during cutting by the cutting blade, thereby improving the cutting effect.

Description

Surgical instrument and end effector assembly thereof

Technical Field

The present utility model relates to the field of surgical instruments, and in particular to a surgical instrument for clamping, cutting and stapling.

Background

Linear clamping, cutting and stapling surgical instruments may be used in surgical procedures to clamp, staple/stapling, cut, etc., tissue. Conventional linear clamping, cutting and stapling surgical instruments include a handle assembly, an elongated body and an end effector assembly. The end effector assembly includes a cartridge assembly and an anvil assembly between which tissue to be cut to anastomose is clamped. The cartridge assembly includes a cartridge having a staple cartridge and a mechanism for driving staples through tissue and against an anvil of the anvil assembly, and the end effector assembly further includes a firing member for cutting tissue driven by a drive mechanism disposed on a side of the handle assembly and a drive mechanism disposed within the handle assembly and the elongate body; when the electric firing mechanism is used, a user can control the driving mechanism to start to enable the firing member to move so as to cut tissues by triggering the firing button on the handle assembly.

In the existing surgical instrument, the nail bin assembly and the nail anvil assembly are relatively and pivotally connected to form a jaw for clamping tissues, as the clamping surfaces are generally smooth structures, the resistance to the tissues is generally small, the tissues are easy to slip in the jaw members, when the tissues are cut, the distal movement of the cutting knife easily causes the jaws between the nail bin assembly and the nail anvil assembly to slide distally, so that the tissues are accumulated distally, the cutting is inconvenient, and the cutting effect is poor; in order to solve the above problems, ribs are generally added on the surface of the clamping tissue in the staple cartridge assembly or the anvil assembly to increase friction force with the tissue so as to prevent the tissue from slipping, but the conventional rib structure can only prevent the tissue from slipping, can not effectively flatten the tissue, and the cutting and anastomosis effects of the tissue in the wrinkled state are still not ideal.

Disclosure of Invention

To this end, the present utility model provides a surgical instrument and end effector assembly thereof that reduces tissue slippage and flattens tissue to enhance cutting and anastomosis.

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

an end effector assembly of a surgical instrument, comprising: the nail bin assembly comprises a nail bin, wherein a chute suitable for moving a cutting knife is arranged on the outer surface of the nail bin, the chute extends from the proximal end to the distal end of the nail bin and divides the nail bin into a first nail outlet area and a second nail outlet area, three rows of nail hole groups are respectively arranged in the first nail outlet area and the second nail outlet area along the sliding direction of the cutting knife, a plurality of rows of nail hole groups are arranged in each row of nail hole group, and a first row of nail hole groups, a second row of nail hole groups and a third row of nail hole groups are arranged in sequence from the near to the far from the chute; the nail bin is arranged between the first row of nail hole groups and the second row of nail hole groups, and between the second row of nail hole groups and the third row of nail hole groups, a plurality of groups of guide ribs are further arranged, part of areas or parts of the guide ribs are intersected with the extending direction of the nail holes, and the direction of the second row of nail hole groups is inclined along the direction from the near end to the far end.

In some embodiments of the present utility model, a set of the guide ribs is disposed in each of the first staple discharging area and the second staple discharging area, and each set of the guide ribs is composed of a plurality of guide ribs arranged from a proximal end to a distal end of the staple cartridge.

In some embodiments of the present utility model, the guide rib includes a first sloped region between the first row of pin hole sets and the second row of pin hole sets, a second sloped region between the second row of pin hole sets and the third row of pin hole sets, a transition region connecting the first sloped region and the second sloped region, and a first extension region at a proximal end of the first sloped region, and a second extension region at a proximal end of the second sloped region.

In some embodiments of the present utility model, along a proximal end to a distal end of the staple cartridge, the staple holes of the three rows of staple hole groups are arranged in a positive "delta" shape, the transition region of the guide rib surrounds the distal end of the staple holes of the second row of staple hole groups, the first extension region surrounds the proximal end of the staple holes of the first row of staple hole groups, and the second extension region surrounds the proximal end of the staple holes of the second row of staple hole groups.

In some embodiments of the present utility model, the proximal hole wall and the distal hole wall of the nail hole are respectively formed with semicircular arc-shaped nail leg guiding grooves, the nail leg guiding grooves extend to the surface of the nail bin along the nail outlet direction of the nail outlet hole, and the internal shapes of the transition region, the first extension region and the second extension region are matched with the shapes of the proximal hole wall and the distal hole wall of the nail outlet hole.

In some embodiments of the present utility model, the guide ribs are symmetrically disposed with respect to a longitudinal center line of the second row of nail hole groups.

In some embodiments of the present utility model, the first staple discharging area and the second staple discharging area are respectively provided with two rows of guide ribs along a sliding direction of the cutter, and the two rows of guide ribs are respectively located between the first row of staple hole groups and the second row of staple hole groups, and between the second row of staple hole groups and the third row of staple hole groups.

In some embodiments of the present utility model, along the proximal end to the distal end of the staple cartridge, the staple outlet holes of the three rows of staple hole groups are arranged in an inverted "character" shape, and the proximal end portion area of the staple outlet holes of the second row of staple hole groups is located in the area between the staple outlet holes of the first row of staple hole groups and the third row of staple hole groups, and the guide rib is located in the area between the proximal end of the staple outlet holes of the second row of staple hole groups and the distal ends of the staple outlet holes of the first row of staple hole groups and the third row of staple hole groups.

In some embodiments of the present utility model, the two rows of guide ribs are symmetrically disposed on two sides of the second row of nail hole groups.

In some embodiments of the present utility model, auxiliary guide ribs are further disposed between adjacent nail outlet holes of the first row of nail hole groups, the second row of nail hole groups and the third row of nail holes, and an extension direction of the auxiliary guide ribs is consistent with an extension direction of the nail outlet holes.

In some embodiments of the present utility model, an auxiliary guiding rib is further disposed between adjacent nail outlet holes of the second row of nail hole groups and the third row of nail holes, and an extending direction of the auxiliary guiding rib is consistent with an extending direction of the nail outlet holes.

In some embodiments of the present utility model, the width of the auxiliary guiding rib is consistent with the width of the nail hole.

In some embodiments of the present utility model, the first row of nail hole groups and the third row of nail hole groups are symmetrically disposed on two sides of the second row of nail hole groups with a longitudinal center line of the second row of nail hole groups as an axis.

In some embodiments of the present utility model, the staple cartridge further comprises a staple pusher and staples, at least a portion of the staple pusher being positioned within the staple apertures of the staple cartridge, the staples being supported on the staple pusher, the staple pusher sliding along the inside to the outside of the staple apertures to eject the staples.

In some embodiments of the present utility model, the staple cartridge further includes a staple cartridge base, the staple cartridge is detachably connected to the staple cartridge base, a staple pushing slider is disposed between the staple cartridge and the staple cartridge base, and when the staple pushing slider moves from the proximal end to the distal end of the staple cartridge, the staple pusher is pushed to slide along the staple hole so as to move the staples to the outside of the staple cartridge.

In some embodiments of the present utility model, there is further included an anvil assembly that is pivotable relative to the cartridge assembly or the cartridge assembly is pivotable relative to the anvil assembly, a jaw for clamping tissue is formed between the anvil assembly and the cartridge assembly.

The present utility model also provides a surgical instrument comprising: a handle assembly, an elongate body assembly, and the end effector assembly described above connected in sequence from a proximal end to a distal end.

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

in the end execution assembly of the surgical instrument provided by the utility model, a plurality of guide ribs are further arranged on the surface of the clamping tissue of the nail bin, and at least part of the guide ribs or part of the regions of the guide ribs are arranged between the first row of nail hole groups and the second row of nail hole groups, and between the second row of nail hole groups and the third row of nail hole groups. The extending direction of the guide ribs in the area is inconsistent with the extending direction of the nail hole, and the guide ribs incline to the direction of the second row of nail hole groups along the proximal end to the distal end. A plurality of guide ribs are combined together to form a guide structure for flattening a guide tissue, and the tissue slides to the left side and the right side of the chute along the arrangement direction of the guide ribs; the guiding ribs gradually extend from the proximal end to the distal end, so that tissues can be prevented from sliding and stacking distally in the firing process, and the cutting effect of the cutting knife is improved.

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 a schematic illustration of the structure of an end effector assembly in one embodiment of a surgical instrument of the present utility model;

FIG. 3 is a schematic view of the structure of a cartridge assembly in one embodiment of a surgical instrument of the present utility model;

FIG. 4 is a schematic view of the internal structure of a cartridge assembly in one embodiment of a surgical instrument of the present utility model;

FIG. 5 is a schematic view of the structure of a pusher sled of one embodiment of a surgical instrument according to the present utility model;

FIG. 6 is a schematic view of the structure of a staple pusher in one embodiment of the surgical instrument of the present utility model;

FIG. 7 is a diagram illustrating the cooperation between a pusher sled, a pusher and staples in an embodiment of a surgical instrument according to the present utility model;

FIG. 8 is a cross-sectional view taken at A-A of FIG. 7;

FIG. 9 is a schematic view of the structure of a staple cartridge in a first embodiment of a surgical instrument of the present utility model;

FIG. 10 is an enlarged view of portion D of FIG. 9;

FIG. 11 is a schematic view of the structure of a staple cartridge in a second embodiment of a surgical instrument of the present utility model;

FIG. 12 is an enlarged view of a portion of a staple cartridge in a second embodiment of a surgical instrument of the present utility model;

FIG. 13 is a schematic view of the structure of a staple cartridge in a third embodiment of a surgical instrument of the present utility model;

FIG. 14 is an enlarged view of a portion of a staple cartridge in a third embodiment of a surgical instrument of the present utility model;

FIG. 15 is an enlarged view of a portion of a staple cartridge in a fourth embodiment of a surgical instrument of the present utility model;

fig. 16 is a schematic view of another embodiment of a 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 of the surgical instrument that is distal from the operator when operated, and "proximal" refers to the end/side of the surgical instrument that is proximal to the operator when operated.

Fig. 1 is a schematic view of a specific 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 the surgical instrument may also be a non-endoscopic surgical cutting anastomosis instrument, such as an open surgical instrument for open surgery.

In particular, fig. 1 shows a surgical instrument 100 that includes a handle assembly 10, an elongate body assembly 20, and an end effector assembly 30. Wherein the handle assembly 10 is adapted to allow an operator to manipulate the surgical instrument, the handle assembly 10 may control movement of the end effector assembly 30 through the elongate body assembly 20 to perform surgical procedures, such as clamping/closing, stapling/stapling, cutting, etc. of tissue. The handle assembly 10 includes a handle body 12 that may be capable of being grasped by a user in a conventional manner. The handle assembly 10 further includes a button by which a user can manipulate the end effector assembly 30 to close, fire, retract, or open, etc., to cause the end effector assembly 30 to sever and staple. Alternatively, the user may manipulate the end effector assembly 30 to close, fire, retract, open, etc., by a trigger provided on the handle assembly 10.

As further shown in fig. 1 and 2, the elongate body assembly 20 is elongate and tubular in shape, and the elongate body assembly 20 transmits the driving force of the handle assembly 10 to the distal end of the surgical instrument 100. The end effector assembly 30 is removably mounted to the distal end of the elongate body assembly 20 and includes a proximal body portion 30a and a distal effector portion 30b, the proximal body portion 30a and the distal effector portion 30b being pivotally connected by a joint assembly 30 c. Distal actuating portion 30b includes a cartridge assembly 31 and an anvil assembly 32, and cartridge assembly 31 and anvil assembly 32 are relatively movable to close the jaws to grasp tissue. In a particular embodiment, the anvil assembly 32 is operable to pivot toward the cartridge assembly 31 until the jaws of the end effector assembly 30 are closed to grasp tissue; anvil assembly 32 is pivoted away from cartridge assembly 31 until the jaws of end effector assembly 30 are opened to release tissue. In an alternative embodiment, the cartridge assembly 31 of the end effector assembly 30 may be operable to pivot the anvil assembly 32 until the jaws of the end effector assembly 30 are closed to grasp tissue; and cartridge assembly 31 is operatively pivoted away from cartridge assembly 31 until the jaws of end effector assembly 30 are opened to release tissue.

As shown in fig. 3 and 4 in particular, the cartridge assembly 31 includes a cartridge 312, a cartridge base 311, and a pusher block 316 disposed within a cavity between the cartridge 312 and the cartridge base 311, with a distal end of the firing member 35 abutting the pusher block 316 and being integrally slidable/movable in a longitudinal axis direction to perform a corresponding surgical procedure. Cartridge assembly 31 further includes staple pusher 313 and staples 314 positioned within staple exit aperture 3122 of staple cartridge 312; when the firing member 35 is driven to move from the proximal end to the distal end, the staple pusher block 316 is pushed to move, and the staple pusher block 316 acts on the staple pusher 313 to push the staples 314 out of the staple cartridge 312, effecting a stapling operation on the tissue.

Specifically, the nail bin base 311 is connected with the joint assembly 30c, the nail bin 312 is used as a disposable part, and the nail bin 312 is inserted into the detachable nail bin base 311 in a clamping and fixing mode. In other alternative embodiments, cartridge mount 311 of cartridge assembly 31 is fixedly coupled to cartridge 312 or integrally formed therewith as a single component that is removably coupled to elongate body assembly 20.

Specifically, as shown in FIG. 9, the cartridge base 311 is formed as an open housing structure having a U-shaped or semi-circular cross-section that is attached to the distal end of the elongate body assembly 20, the cartridge base 311. The cartridge 312 is formed in an elongated housing, including an outer surface or staple exit surface distal from the cartridge base 311 for engagement with tissue, and a chute 3121 extending proximally to distally of the cartridge 312 is provided on the staple exit surface, the chute 3121 being adapted for the passage of a cutting knife 33 for cutting tissue clamped between the outer surface and the anvil assembly 32 proximally to distally of the cartridge 312. In an alternative embodiment, the sliding slot 3121 is located at a middle position of the upper surface of the nail cartridge 312, and the central line of the sliding slot 3121 along the extending direction forms a longitudinal axis C of the nail cartridge 312; the staple cartridge 312 is divided into a first staple discharging zone and a second staple discharging zone by the chute 3121.

The first staple discharging area and the second staple discharging area of the staple cartridge 312 are respectively provided with three rows of staple hole groups, each row of staple hole groups is provided with a plurality of staple hole 3122, the staple hole 3122 is arranged along the direction of the longitudinal axis C of the staple cartridge 312, the staple hole 3122 can be used for accommodating the staples 314 and the staple pusher 313, and one side of the staple pusher 313 facing the staple discharging surface of the staple cartridge 312 is provided with the staples 314; staple pusher 313 can implant staples 314 into tissue to effect suturing. Wherein, the first row of nail hole groups A1, the second row of nail hole groups A2 and the third row of nail hole groups A3 are arranged from the near to the far from the sliding chute 3121; the first row of nail hole groups A1 and the third row of nail hole groups A3 are symmetrically arranged on two sides of the second row of nail hole groups A2 by taking a longitudinal center line of the second row of nail hole groups A2 (i.e. a center line of the second row of nail hole groups A2 along the longitudinal axis direction of the nail bin 312) as an axis, and the sizes and shapes of the nail outlet holes 3122 of the first row of nail hole groups A1, the second row of nail hole groups A2 and the third row of nail hole groups A3 are the same. Specifically, the staple ejection hole 3122 is formed as a long hole, and the extending direction of the staple ejection hole 3122 is the same as the sliding direction of the cutter 33 (the direction of the longitudinal axis C of the staple cartridge 312).

As shown in fig. 5, the pushing slide block includes a connecting plate 3161, the connecting plate 3161 is slidably matched with the pushing slide rail 318, and the pushing slide block further includes two wedge blocks disposed on the connecting plate 3161 at intervals, so as to form the first pushing slide block 3163 and the second pushing slide block 3162 respectively. The pushing block is provided with a block 3164 between the two wedge blocks, the cutter 33 is pushed against the proximal end of the block 3164, and when the cutter 33 slides along the proximal end to the distal end of the sliding slot 3121, the pushing block 3164 is pushed to enable the pushing block and the cutter 33 to synchronously move.

As shown in fig. 6, in the embodiment of the surgical instrument 100 of the present utility model, the staple pusher 313 includes a staple pushing body portion 3131 and at least two support portions 3132 respectively connected to the staple pushing body portion 3131, and the staples 314 are disposed on the support portions 3132. The nail pushing main body 3131 is formed into a block shape as a base of the supporting portion 3132, the supporting portion 3132 is formed into a sheet shape or a plate shape which are arranged at intervals, the number of the supporting portions 3132 is the same as the number of the nail hole rows on the first nail discharging area or the second nail discharging area, for example, as shown in fig. 4, three rows of nail hole groups are arranged on the first nail discharging area or the second nail discharging area, the supporting portions 3132 of the nail pushing device 313 are three, the three supporting portions 3132 are arranged in the same manner as the three rows of nail holes, and the three supporting portions 3132 are arranged like a Chinese character 'pin'.

Referring to fig. 7 and 8, the supporting portion 3132 is provided with an arc-shaped mounting groove 3132a which is matched with the outer surface of the suture nail 314. The staple 314 includes a support arm 3141 and a plugging arm 3142, wherein the support arm 3141 is located in the mounting groove 3132a of the support portion 3132 of the staple pusher 313, and the plugging arm 3142 is disposed at an obtuse angle with respect to the support arm 3141. When the ejector pin slider 316 moves along the proximal end to the distal end of the staple cartridge 312, the ejector pin slider 316 cooperates with the pushing inclined surface of the ejector pin body 3131 of the ejector pin 313 to move the ejector pin 313 along the inner side of the staple hole 3122 to the outer side of the staple hole 3122, the ejector pin 313 drives the staples 314 to synchronously move, and the insertion arm 3142 of the staples 314 passes through the tissue to be stapled and performs stapling of the tissue under the action of the anvil assembly 32.

As shown in fig. 7, the pusher 313 is slidable in the nail hole 3122 with a slight gap therebetween, and the pusher slide 316 pushes the pushing ramp of the pusher 313, translating the axial movement of the pusher slide 316 into a slightly inclined movement of the pusher 313 along the nail hole 3122. Specifically, the ejector 313 receives the pushing force of the longitudinal axis C, and under the action of the pushing inclined plane and the nail hole 3122, the ejector 313 ejects along the nail hole 3122 in the slightly inclined state of the supporting part 3132, at this time, the moment of maximum resistance generated by deformation of the nail 314 supported by the supporting part 3132 at the proximal end of the ejector 313 is earlier than the moment of maximum resistance generated by deformation of the nail 314 supported by the supporting part 3132 at the distal end, which can achieve sequential forming of nails at different positions, and not achieve maximum resistance, and the force required by the firing member 35 to drive the nail pushing slider 316 is the firing force. Specifically, the staple pusher 316 drives the staple ejectors 313 on both sides of the slide slot 3121, staples 314 sequentially pushed out by the same staple ejector 313 along the driving direction of the staple pusher 316, the laterally arranged staples are ejected simultaneously, and the longitudinally arranged staples are ejected sequentially.

In order to avoid that the tissue slides between the cartridge assembly 31 and the anvil assembly 32 during the process of driving the cutter 33 by the staple pushing slider 316, the tissue is further accumulated to the distal end; as shown in fig. 9-15, a plurality of guiding ribs 3123 are further disposed on the upper surface (i.e. the surface that clamps the tissue) of the staple cartridge 312, wherein at least a portion of the guiding ribs 3123 or a partial area of the guiding ribs 3123 is disposed between the first row of staple hole groups A1 and the second row of staple hole groups A2, and between the second row of staple hole groups A2 and the third row of staple hole groups A3. The extending direction of the guide ribs 3123 in this area is inconsistent with the extending direction of the nail hole 3122, that is, the extending direction of the two extending directions intersect and incline towards the direction of the second row of nail hole groups A2 along the proximal end to the distal end, and a plurality of guide ribs 3123 are combined together to form a guide structure for guiding tissue flattening; in the firing process, the guiding ribs 3123 extending from the proximal end to the distal end in a tapered manner can guide the tissue to slide to the left and right sides of the sliding groove 3121 along the direction of the guiding ribs 3123, so as to reduce the distal sliding of the tissue along the firing direction and further improve the cutting effect of the cutting knife.

The specific structural form of the guide ribs 3123 is not unique; the following sections describe four different forms of guide ribs 3123, respectively.

Fig. 9-10 illustrate a first embodiment of the guide ribs 3123, wherein in this embodiment, a first staple ejection zone and a second staple ejection zone are each provided with a set of said guide ribs 3123, each set of said guide ribs 3123 being comprised of a plurality of guide ribs 3123 arranged along the proximal to distal end of the staple cartridge 312.

The guiding ribs 3123 are axisymmetric protruding structures, which are axisymmetric with respect to the longitudinal center line of the second row of nail hole groups A2. The guide ribs 3123 include a first inclined region 3123a between the first row of nail hole groups A1 and the second row of nail hole groups A2, a second inclined region 3123b between the second row of nail hole groups A2 and the third row of nail hole groups A3, a transition region 3123c connecting the first inclined region 3123a and the second inclined region 3123b, and a first extension region 3123d at a proximal end of the first inclined region 3123a, and a second extension region 3123e at a proximal end of the second inclined region 3123 b. Wherein the first inclined region 3123a and the second inclined region 3123b are inclined with respect to the extending direction of the nail hole 3122, and the proximal ends of the first inclined region 3123a and the second inclined region 3123b are closer to the second row of nail hole groups A2 than the distal ends thereof. The guide ribs 3123 extend continuously in a curved line perpendicular to the longitudinal axis, and the guide tissue slides and flattens in a direction away from the slide groove 3121 along the curved line of the guide ribs 3123.

Along the proximal end to the distal end of the staple cartridge 312, the staple holes 3122 of the three rows of staple hole groups are arranged in a positive "delta" shape, and in each of the delta-shaped staple hole groups, a distal end portion of the staple holes 3122 of the second row of staple hole groups A2 is in an area between the staple holes 3122 of the first row of staple hole groups A1 and the third row of staple hole groups A3. The transition region 3123c of the guide rib 3123 surrounds the distal end of the staple holes 3122 of the second row of staple hole groups A2, the first extension region 3123d surrounds the proximal end of the staple holes 3122 of the first row of staple hole groups A1, and the second extension region 3123e surrounds the proximal end of the staple holes 3122 of the second row of staple hole groups A2.

As shown in fig. 10, the proximal hole wall and the distal hole wall of the staple discharging hole 3122 are respectively formed with semicircular arc-shaped staple leg guiding grooves 3122a, the staple leg guiding grooves 3122a extend to the surface of the staple cartridge 312 along the staple discharging direction of the staple discharging hole 3122, and the inner shapes of the transition region 3123c, the first extending region 3123d and the second extending region 3123e are matched with the shapes of the proximal hole wall and the distal hole wall of the staple discharging hole 3122, so that the staples can continue to smoothly transition along the inner surfaces of the transition region 3123c, the first extending region 3123d and the second extending region 3123e after being extended along the staple discharging hole 3122, and the anastomosis effect is better.

As shown in fig. 9, the guide ribs 3123 are arranged less than the number of the chevron-shaped staple hole sets along the proximal end to the distal end of the staple cartridge 312. In other alternative embodiments, the guide ribs 3123 are arranged in the same number as the pin hole sets.

A second embodiment of the guide ribs 3123 is shown in fig. 11-12. Wherein, the first staple discharging area and the second staple discharging area are respectively provided with two rows of guide ribs 3123 along the sliding direction of the cutter, and the two rows of guide ribs 3123 are respectively positioned between the first row of staple hole groups A1 and the second row of staple hole groups A2, and between the second row of staple hole groups A2 and the third row of staple hole groups A3. The extending direction of the two rows of guide ribs 3123 is intersected with the extending direction of the nail hole 3122, and the two rows of guide ribs 3123 are symmetrically disposed at two sides of the second row of nail hole groups A2, the distal ends of each pair of guide ribs 3123 in the two rows of guide ribs 3123 are closer to the second row of nail hole groups A2 than the proximal ends thereof, that is, each pair of guide ribs 3123 forms a convex form gradually shrinking from the proximal side to the distal side.

Along the proximal end to the distal end of the staple cartridge 312, the staple holes 3122 of the three rows of staple hole groups are arranged in an inverted "delta" shape, and in each of the inverted "delta" staple hole groups, the proximal end portion of the staple hole 3122 of the second row of staple hole group A2 is located in the area between the staple holes 3122 of the first row of staple hole group A1 and the third row of staple hole group A3, and the guiding ribs 3123 are located in the area between the proximal ends of the staple holes 3122 of the second row of staple hole group A2 and the distal ends of the staple holes 3122 of the first row of staple hole group A1 and the third row of staple hole group A3.

Fig. 13-14 show a third embodiment of the guide ridge 3123, the guide ridge 3123 in this embodiment being an addition of an auxiliary guide ridge 3123' to the guide ridge 3123 of the second embodiment.

Specifically, as shown in fig. 14, auxiliary guiding ribs 3123' are further disposed between adjacent nail hole 3122 of the first row of nail hole groups A1, the second row of nail hole groups A2 and the third row of nail hole groups A3, the extending direction of the auxiliary guiding ribs 3123' is consistent with the extending direction of the nail hole 3122, and the width of the auxiliary guiding ribs 3123' is consistent with the width of the nail hole 3122. The addition of the auxiliary guide ribs 3123' provides a more uniform gripping force and a greater gripping resistance to the tissue in each region of the cartridge 312, which provides a smoother gripped tissue and prevents distal stacking of the tissue.

As shown in fig. 15, a fourth embodiment of the guide rib 3123 is shown, the guide rib 3123 in this embodiment being added with an auxiliary guide rib 3123' on the basis of the guide rib 3123 of the second embodiment.

Specifically, as shown in fig. 15, the auxiliary guiding ribs 3123' are disposed between the adjacent nail holes 3122 of the second row of nail hole groups A2 and the third row of nail hole groups A3, that is, the auxiliary guiding ribs 3123' are not disposed between the adjacent nail holes 3122 of the first row of nail hole groups A1, and because the first row of nail hole groups A1 are closer to the sliding groove 3121, the cutting force is larger, and the problem of tissue rupture caused by excessive force when performing anastomosis cutting on thinner tissue can be avoided by not disposing the auxiliary guiding ribs 3123'. More specifically, the extending direction of the auxiliary guiding ribs 3123 'coincides with the extending direction of the nail hole 3122, and the width of the auxiliary guiding ribs 3123' coincides with the width of the nail hole 3122.

As an alternative embodiment, the end effector assembly of the surgical instrument of the present utility model may also fit within a surgical instrument 200 as shown in FIG. 16. For example, the surgical instrument 200 includes a handle assembly 210, an elongate body assembly 220, and an end effector assembly 230, wherein the end effector assembly 230 includes a cartridge assembly 231 and an anvil assembly 232, wherein a cartridge base of the cartridge assembly 231 is coupled to the elongate body assembly 220, and wherein the end effector assembly 230 has the same structure as the end effector assembly 30 of the surgical instrument 100 described above, and further description thereof is omitted herein.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. 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 (17)

1. An end effector assembly of a surgical instrument, comprising: the nail bin assembly comprises a nail bin, wherein a chute suitable for the movement of a cutting knife is arranged on the outer surface of the nail bin, the chute extends from the proximal end to the distal end of the nail bin and divides the nail bin into a first nail outlet area and a second nail outlet area, three rows of nail hole groups are respectively arranged in the first nail outlet area and the second nail outlet area along the sliding direction of the cutting knife, each row of nail hole groups is provided with a plurality of nail hole listing groups, and a first row of nail hole groups, a second row of nail hole groups and a third row of nail hole groups are sequentially arranged from the near to the far from the chute;

the nail bin is arranged between the first row of nail hole groups and the second row of nail hole groups, and between the second row of nail hole groups and the third row of nail hole groups, a plurality of groups of guide ribs are further arranged, part of areas or parts of the guide ribs are intersected with the extending direction of the nail holes, and the direction of the second row of nail hole groups is inclined along the direction from the near end to the far end.

2. The end effector assembly of a surgical instrument of claim 1,

the first nail outlet area and the second nail outlet area are respectively provided with a group of guide convex ribs, and each group of guide convex ribs consists of a plurality of guide convex ribs which are arranged from the proximal end to the distal end of the nail bin.

3. An end effector assembly of a surgical instrument as recited in claim 2, wherein,

the guide ribs include a first sloped region between the first and second rows of pin hole sets, a second sloped region between the second and third rows of pin hole sets, a transition region connecting the first and second sloped regions, and a first extension region at a proximal end of the first sloped region, and a second extension region at a proximal end of the second sloped region.

4. An end effector assembly of a surgical instrument as recited in claim 3, wherein,

along the proximal end to the distal end of the nail storehouse, the nail hole of three rows of nail hole groups is positive "article" font and arranges, the transition zone of guide protruding muscle encircles the distal end of the nail hole of second row of nail hole group, first extension zone encircles the proximal end of the nail hole of first row of nail hole group, the second extension zone encircles the proximal end of the nail hole of second row of nail hole group.

5. The end effector assembly of a surgical instrument of claim 4,

the nail-discharging hole comprises a nail-discharging hole, a transition zone, a first extension zone, a second extension zone, a proximal hole wall and a distal hole wall, wherein the proximal hole wall and the distal hole wall of the nail-discharging hole are respectively formed with semicircular arc-shaped nail leg guide grooves, the nail leg guide grooves extend to the surface of a nail bin along the nail-discharging direction of the nail-discharging hole, and the inner shapes of the transition zone, the first extension zone and the second extension zone are matched with the shapes of the proximal hole wall and the distal hole wall of the nail-discharging hole.

6. The end effector assembly of a surgical instrument of claim 5,

the guide ribs are symmetrically arranged by taking the longitudinal center line of the second row of nail hole groups as an axis.

7. The end effector assembly of a surgical instrument of claim 1,

the first nail outlet area and the second nail outlet area are respectively provided with two rows of guide convex ribs along the sliding direction of the cutting knife, and the two rows of guide convex ribs are respectively positioned between the first row of nail hole groups and the second row of nail hole groups and between the second row of nail hole groups and the third row of nail hole groups.

8. The end effector assembly of claim 7, wherein,

along the proximal end to the distal end of the nail bin, the nail outlet holes of the three rows of nail hole groups are arranged in an inverted-Chinese character 'pin', and the partial region of the nail outlet holes of the second row of nail hole groups is positioned in the region between the nail outlet holes of the first row of nail hole groups and the third row of nail hole groups, and the guide ribs are positioned in the region between the nail outlet holes of the second row of nail hole groups and the distal ends of the nail outlet holes of the first row of nail hole groups and the third row of nail hole groups.

9. The end effector assembly of claim 7, wherein,

the two rows of guide ribs are symmetrically arranged on two sides of the second row of nail hole groups.

10. The end effector assembly of claim 7, wherein,

an auxiliary guide convex rib is further arranged between the adjacent nail outlet holes of the first row of nail hole groups, the second row of nail hole groups and the third row of nail holes, and the extending direction of the auxiliary guide convex rib is consistent with that of the nail outlet holes.

11. The end effector assembly of claim 7, wherein,

auxiliary guide ribs are further arranged between adjacent nail outlet holes of the second row of nail hole groups and the third row of nail holes, and the extending direction of the auxiliary guide ribs is consistent with that of the nail outlet holes.

12. An end effector assembly of a surgical instrument according to claim 10 or 11,

the width of the auxiliary guide convex rib is consistent with the width of the nail outlet hole.

13. The end effector assembly of a surgical instrument of claim 1,

the first row of nail hole groups and the third row of nail hole groups are symmetrically arranged on two sides of the second row of nail hole groups by taking the longitudinal center line of the second row of nail hole groups as an axis.

14. The end effector assembly of a surgical instrument of claim 1 or 2, further comprising a staple pusher and staples, at least a portion of said staple pusher being positioned within a staple aperture of said staple cartridge, said staples being supported on said staple pusher, said staple pusher sliding along an inside-to-outside of said staple aperture to eject said staples.

15. The end effector assembly of claim 12, further comprising a cartridge base, wherein the cartridge is removably coupled to the cartridge base, wherein a pusher block is disposed between the cartridge and the cartridge base, wherein the pusher block moves along the proximal to distal ends of the cartridge to push the staple along the staple aperture to move the staples out of the cartridge.

16. The end effector assembly of claim 1 or 2, further comprising an anvil assembly, said anvil assembly being pivotable relative to said cartridge assembly or said cartridge assembly being pivotable relative to said anvil assembly, said anvil assembly and said cartridge assembly defining therebetween a jaw for clamping tissue.

17. A surgical instrument, comprising: a handle assembly, an elongate body assembly, and an end effector assembly as claimed in any one of claims 1 to 16 connected in sequence from proximal to distal.