CN111870295A - Surgical stitching instrument with protruding nail bins with different characteristics - Google Patents

Surgical stitching instrument with protruding nail bins with different characteristics Download PDF

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Publication number
CN111870295A
CN111870295A CN202010828526.4A CN202010828526A CN111870295A CN 111870295 A CN111870295 A CN 111870295A CN 202010828526 A CN202010828526 A CN 202010828526A CN 111870295 A CN111870295 A CN 111870295A
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CN
China
Prior art keywords
staple cartridge
nail
nail bin
protrusions
tissue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010828526.4A
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Chinese (zh)
Inventor
俞晓立
贲晓松
彭晓维
郑俊杰
乔贵宾
谢佳宏
蔡正信
王宇
张应腾
魏鸿键
徐锦斌
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Second Affiliated Hospital of Guangzhou Medical University
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Second Affiliated Hospital of Guangzhou Medical University
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Publication date
Application filed by Second Affiliated Hospital of Guangzhou Medical University filed Critical Second Affiliated Hospital of Guangzhou Medical University
Priority to CN202010828526.4A priority Critical patent/CN111870295A/en
Publication of CN111870295A publication Critical patent/CN111870295A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214—Stapler heads
    • A61B2017/07235—Stapler heads containing different staples, e.g. staples of different shapes, sizes or materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214—Stapler heads
    • A61B2017/07242—Stapler heads achieving different staple heights during the same shot, e.g. using an anvil anvil having different heights or staples of different sizes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214—Stapler heads
    • A61B2017/07271—Stapler heads characterised by its cartridge

Abstract

The invention provides a surgical stapler with protruding nail bins with different characteristics, which comprises an executing part, wherein the executing part comprises a stapling opening and closing component, a cutting component, a connecting component and a shell component, the stapling opening and closing component comprises a nail bin, a nail anvil, a stapling nail, a nail pushing sheet and a sliding block, wherein the surface of the nail bin is distributed with protrusions with different heights or different unit area quantities or different cross-sectional areas or different shapes, and according to the characteristic of tissue compression, the protrusions with different characteristics are flexibly arranged on the nail bin, so that the squeezing damage to the tissue can be reduced, and the effect of compressing the tissue can be realized.

Description

Surgical stitching instrument with protruding nail bins with different characteristics
Technical Field
The invention relates to the technical field of medical instruments, in particular to a surgical stapler which is suitable for suturing and cutting tissues in surgical operations, such as human tissues of lung, esophagus, stomach, jejunum, ileum, colon, rectum and the like.
Background
The main working principle of surgical staplers is to use titanium staples to sever or staple tissue, similar to a stapler.
Surgical staplers are now used more and more extensively in surgical procedures, and have become an essential medical instrument to assist surgeons in cutting and stapling. It has several major advantages: 1. the operation time can be greatly shortened, and the operation efficiency is obviously improved; 2. the situations that the wound is easily infected and errors are easily caused by manual suture can be effectively avoided; 3. the postoperative recovery time of the operation object is shortened; 4. the disposable use avoids cross infection and the like;
the surgical stapler has the main functions of cutting and suturing tissues, firstly, a nail bin and a nail anvil of the surgical stapler are controlled to clamp the tissues to be sutured and cut, a safety device is opened, a firing handle is continuously pressed to drive a firing cam to move from a near end to a far end (the near end is close to an operator end, and the far end is far away from the operator end), the firing cam drives a push knife and a nail pushing sliding block to move from the near end to the far end, the sliding block pushes a pushing sheet in a nail bin hole to vertically move upwards, further, the titanium staples are pushed to vertically move upwards and are mutually extruded into a B shape with a nail forming groove, the tissues are firmly sutured, the tissues clamped by the nail bin and the nail anvil are cut from the middle by the push knife, and the suturing and cutting of the.
However, in the process of suturing and cutting, because the pressing force of the nail anvil and the nail bin on the tissue is insufficient, the sutured and cut tissue is easy to move towards the far end due to the extrusion of the push broach, so that tissue flowing force is formed, the titanium staples deviate from a preset forming track due to the tissue flowing force, the staples are poorly formed, the tissue is not sutured well, tissue hemorrhage is caused, and the life of a patient is seriously damaged.
Through analysis, a contradiction exists between the two methods, on one hand, the closing gap between the nail anvil and the nail bin is expected to be small, so that the pressing force on the tissue is large, the tissue is prevented from moving during suturing and cutting, but excessive nail forming is easily caused, the blood circulation of the tissue is insufficient, and the pressure of the nail bin and the nail anvil on the whole tissue is too large, so that the damage to the tissue is easily increased, and the postoperative recovery is not facilitated; on the other hand, the closing gap between the nail anvil and the nail bin is expected to be larger, so that the damage to the tissue can be reduced, and the recovery of a patient is facilitated.
The existing surgical stapler has proposed a corresponding solution to the situation, such as adding some bumps on the staple cartridge and the anvil surface to locally enhance the pressing on the tissue, for example, US 10,194,912B2 granted by US 2019, 2/5, the design of which can indeed increase the pressing force on the tissue on the basis of not changing the gap between the staple cartridge and the anvil, but the bumps at all parts have the same height, which causes some troubles, for example, if the bumps are too high, the local tissue is greatly damaged, even necrotized, which affects the healing of the anastomotic orifice; on the other hand, if the height of the projections is too low, tissue damage may be reduced, but compression of the tissue may not work well.
Disclosure of Invention
Therefore, the design of the convex block on the existing nail bin needs to be improved according to the tissue compression characteristics so as to obtain better clinical effect.
The technical scheme is as follows: a surgical stapler with protruding nail bins with different characteristics comprises an execution part, wherein the execution part comprises a stapling opening and closing component, a cutting component, a connecting component and a shell component; the nail closing and opening assembly comprises a nail bin, a nail anvil, a sewing nail, a nail pushing sheet and a sliding block, the nail bin and the nail anvil can be closed and opened in a rotating mode, and the sewing nail, the nail pushing sheet and the sliding block are movably arranged in the nail bin; the cutting assembly comprises a cutting knife and a push rod, and the cutting knife is fixedly connected with the push rod; the connecting assembly comprises a hinge and a steering connecting piece; the shell assembly comprises an upper shell and a lower shell, wherein the upper shell is fixedly connected with the lower shell; the cutting assembly is slidably fixed in the stapling opening and closing assembly and the shell assembly, the cutting assembly pushes the sliding block to move, the sliding block pushes the staple pushing sheet to move, the staple pushing sheet pushes the staples to move, and finally the staples are abutted against the staple anvil to form a B shape so as to staple tissues;
the surface of the nail bin is distributed with bulges with different heights or different unit area quantities or different cross-sectional areas or different shapes. According to the tissue compression characteristics, various bulges with different characteristics are flexibly arranged on the nail bin, so that the squeezing damage to the tissue can be reduced, and the tissue can be compressed.
In example 1, the surface of the staple cartridge is distributed with protrusions with different heights, wherein the protrusion near the distal side of the staple cartridge is higher than the protrusion near the proximal side of the staple cartridge, the distal side is the side near the head of the staple cartridge, and the proximal side is the side far away from the head of the staple cartridge.
Preferably, the design can well balance the tissue squeezing force of the nail anvil of the nail bin, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the near side to the far side, the pressing force of the far side of the nail anvil of the nail bin can be smaller than that of the near side, the pressing force of the far side of the nail anvil of the nail bin can be increased by designing the bulge of the far side of the nail bin to be higher, and the pressing force of the nail anvil of the nail bin on the far side of the nail bin can be increased within the range of the.
In example 2, the protrusions with different heights are distributed on the surface of the nail bin, wherein the protrusion close to the outer side of the nail bin is higher than the protrusion close to the inner side of the nail bin, the inner side is the side close to the nail bin cutter groove, and the outer side is the side far away from the nail bin cutter groove.
Preferably, the design can well balance the force of the nail anvil of the nail bin for squeezing the tissues, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the inner side to the outer side, the pressing force of the outer side of the nail anvil of the nail bin is smaller than that of the inner side, the pressing force of the outer side of the nail anvil of the nail bin can be increased by designing the bulge of the outer side of the nail bin to be higher, and the pressing force of the nail anvil of the nail bin on the tissues is improved within the range of the force for safely squeezing the tissues.
In embodiment 3, the surface of the nail bin is distributed with protrusions with different heights, wherein the nail bin is divided into two sides by taking a cutter groove of the nail bin as a center line, and the height of the protrusion on one side of the nail bin is higher than that of the protrusion on the other side of the nail bin.
Preferably, in most tissue removal procedures, the other portion to be removed by the surgical stapler is the tissue (e.g., cancerous tissue) that needs to be removed from the body, and for this reason, the portion of the tissue does not need to be crushed, and the cartridge bulge corresponding to the side tissue can be designed higher, thereby greatly enhancing the compressive force of the cartridge anvil as a whole, without increasing the crushing damage of the tissue that needs to be preserved.
In example 4, protrusions with different numbers of unit areas are distributed on the surface of the staple cartridge, wherein the number of the protrusions distributed on the unit area close to the far side of the staple cartridge is greater than the number of the protrusions distributed on the unit area close to the near side of the staple cartridge, the far side is the side close to the head of the staple cartridge, and the near side is the side far away from the head of the staple cartridge.
Preferably, the design can well balance the tissue squeezing force of the nail anvil of the nail bin, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the near side to the far side, the pressing force of the far side of the nail anvil of the nail bin is smaller than that of the near side, the pressing force and the friction force of the far side of the nail anvil of the nail bin can be increased by arranging a plurality of bulges on the far side of the nail bin, and the pressing force and the friction force on the tissue are improved within the range of the tissue safe squeezing force.
In example 5, the number of protrusions distributed on the surface of the nail bin is different, wherein the number of protrusions distributed on the surface of the nail bin is larger than the number of protrusions distributed on the surface of the nail bin, the protrusions are distributed on the surface of the nail bin.
Preferably, the design can well balance the force of the nail anvil of the nail bin for squeezing the tissues, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the inner side to the outer side, the pressing force of the outer side of the nail anvil of the nail bin is smaller than that of the inner side, the pressing force and the friction force of the outer side of the nail anvil of the nail bin can be increased by arranging a plurality of bulges on the outer side of the nail bin, and the pressing force and the friction force on the tissues are improved within the range of the force for safely squeezing the tissues.
In example 6, protrusions with different cross-sectional areas are distributed on the surface of the staple cartridge, wherein the cross-sectional area of the protrusion near the distal side of the staple cartridge is larger than that of the protrusion near the proximal side of the staple cartridge, the distal side is the side near the head of the staple cartridge, and the proximal side is the side far away from the head of the staple cartridge.
Preferably, the design can well balance the tissue squeezing force of the nail anvil of the nail bin, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the near side to the far side, the pressing force of the far side of the nail anvil of the nail bin is smaller than that of the near side, the pressing force and the friction force of the far side of the nail anvil of the nail bin can be increased by arranging the cross section area of the bulge of the far side of the nail bin to be larger, and the pressing force and the friction force of the nail anvil of the nail bin on the far side of the nail anvil can be increased.
In example 7, protrusions with different cross-sectional areas are distributed on the surface of the nail bin, wherein the cross-sectional area of the protrusion close to the inner side of the nail bin is larger than that of the protrusion close to the outer side of the nail bin, the inner side is the side close to the nail bin cutter groove, and the outer side is the side far away from the nail bin cutter groove.
Preferably, the design can well balance the force of the nail anvil of the nail bin for squeezing the tissues, because the pressing force of the nail anvil of the nail bin is gradually transmitted from the inner side to the outer side, the pressing force of the outer side of the nail anvil of the nail bin is smaller than the pressing force of the inner side, the pressing force and the friction force of the outer side of the nail anvil of the nail bin can be increased by arranging the cross section area of the bulge of the outer side of the nail bin to be larger, and the pressing force and the friction force of the tissue are improved within the range of the force for safely squeezing the.
In embodiment 8, the surface of the nail bin is distributed with protrusions of different shapes, wherein the nail bin is divided into two sides by taking a cutter groove of the nail bin as a center line, the protrusion on one side of the nail bin is in a shape of a spine like a cone and the like, and the protrusion on the other side of the nail bin is a cylinder.
Preferably, in most tissue resection operations, the other part to be resected by the surgical stapler is the tissue (such as cancerated tissue) to be removed from the body, and for this reason, the tissue of the part does not need to be considered to be pressed or punctured, and the cartridge bulge corresponding to the tissue at the side can be designed to be in a cone-like and spine-like shape, so that the pressing force or gripping force of the whole cartridge anvil can be greatly enhanced, and the pressing damage of the tissue to be kept is not increased.
Drawings
FIG. 1 is an axial view of an actuator according to the present invention.
Fig. 2 is an exploded view of a front view of an implement portion of the present invention.
Fig. 3 is an exploded perspective view of an actuator of the present invention.
FIG. 4 is an isometric view of a staple cartridge of example 1 of the present invention.
FIG. 5 is a front view of a staple cartridge of example 1 of the present invention and a cross-sectional view taken along the axis A-A thereof.
FIG. 6 is an isometric view of a staple cartridge of example 2 of the present invention.
FIG. 7 is a front view of a staple cartridge of example 2 of the present invention.
FIG. 8 is an isometric view of a staple cartridge of example 3 of the present invention.
FIG. 9 is a front view of a staple cartridge of example 3 of the present invention.
FIG. 10 is an isometric view of a staple cartridge of example 4 of the present invention.
FIG. 11 is a top view of the staple cartridge of example 4 of the present invention and a graph showing the number of proximal and distal protrusions per unit area thereof.
FIG. 12 is an isometric view of a staple cartridge of example 5 of the present invention.
FIG. 13 is a top view of the staple cartridge of example 5 of the present invention and a graph showing the number of protrusions per unit area on the inside and outside of the staple cartridge.
FIG. 14 is an isometric view of a staple cartridge of example 6 of the present invention.
FIG. 15 is a top view of a staple cartridge according to example 6 of the present invention.
FIG. 16 is a top view of a staple cartridge according to example 7 of the present invention.
FIG. 17 is an isometric view and a close-up view of a staple cartridge of example 8 of the present invention.
FIG. 18 is a front view of a staple cartridge of example 8 of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description of the present invention, Y represents the distal side (i.e., the side closer to the cartridge head 113), J represents the proximal side (i.e., the side farther from the cartridge head 113), N represents the inner side (the side closer to the knife slot 112), and W represents the outer side (the side farther from the knife slot 112).
As shown in fig. 1 to 3, a surgical stapler with a staple cartridge 11 having different characteristic projections 111 comprises an executing part 0, wherein the executing part comprises a stapling opening and closing assembly 1, a cutting assembly 2, a connecting assembly 3 and a shell assembly 4; the stapling opening and closing assembly 1 comprises a nail bin 11, a nail anvil 12, a stapling nail 13, a nail pushing sheet 14 and a slide block 15, wherein the nail bin 11 and the nail anvil 12 can be rotatably closed and opened, and the stapling nail 13, the nail pushing sheet 14 and the slide block 15 are movably arranged in the nail bin 11; the cutting assembly 2 comprises a cutting knife 21 and a push rod 22, and the cutting knife 21 is fixedly connected with the push rod 22; the connecting component 3 comprises a hinge 31 and a steering connecting piece 32; the shell assembly 4 comprises an upper shell 41 and a lower shell 42, wherein the upper shell 41 is fixedly connected with the lower shell 42; the stapling opening and closing component 1 and the shell component 4 are fixed together through the connecting component 3, the cutting component 2 is slidably fixed in the stapling opening and closing component 1 and the shell component 4, the cutting component 2 pushes the sliding block 15 to move, the sliding block 15 pushes the staple pushing sheet 14 to move, the staple pushing sheet 14 pushes the staples 13 to move, and finally the staples 13 are abutted against the nail anvil 12 to form a B shape so as to suture tissues;
the surface of the nail bin 11 is distributed with bulges 111 with different heights or different unit area numbers or different cross-sectional areas or different shapes. According to the tissue compression characteristics, the various protrusions 111 with different characteristics are flexibly arranged on the nail bin 11, so that the effects of reducing the compression damage to the tissue and compressing the tissue can be achieved.
As shown in FIGS. 4 and 5, in the embodiment 1, the surface of the nail cartridge 11 is distributed with the protrusions 111 with different heights, wherein the protrusion 111 near the far side Y of the nail cartridge 11 is higher than the protrusion 111 near the near side J of the nail cartridge 11 (i.e. the height of the protrusion 111 is compared with H1 & gtH 2 & gtH 3 & gtH 4 & gtH 5 & gtH 6 & gtH 7).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the near side J to the far side Y, the pressing force of the far side Y of the nail bin 11 is smaller than that of the near side J, the pressing force of the far side Y of the nail bin 11 can be increased by designing the bulge 111 of the far side Y of the nail bin 11 to be higher, and the pressing force of the tissue is improved within the range of the tissue safe squeezing force.
As shown in fig. 6 and 7, in example 2, the protrusions 111 with different heights are distributed on the surface of the nail bin 11, wherein the protrusions 111 near the outer side W of the nail bin 11 are higher than the protrusions 111 near the inner side N of the nail bin 11 (i.e., the heights of the protrusions 111 are compared, H8-H13-H9-H12-H10-H11).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the inner side N to the outer side W, the pressing force of the outer side W of the nail bin 11 is smaller than that of the inner side N, the pressing force of the outer side W of the nail bin 11 can be increased by designing the bulge 111 of the outer side W of the nail bin 11 to be higher, and the pressing force of the tissue is improved within the range of the tissue safe squeezing force.
As shown in FIGS. 8 and 9, in the embodiment 3, the surface of the nail bin 11 is distributed with the protrusions 111 with different heights, wherein the nail bin 11 is divided into two sides by taking the cutting knife groove 112 of the nail bin 11 as a center line, the height of the protrusion 111 at one side of the nail bin 11 is higher than that of the protrusion 111 at the other side of the nail bin 11 (i.e. the height of the protrusion 111 is compared with H14 > H15).
In most tissue removal procedures, the other portion to be removed by the surgical stapler is the tissue (e.g., cancerous tissue) that needs to be removed from the body, and for this reason, the protrusion 111 of the staple cartridge 11 corresponding to the tissue on the side of the surgical stapler can be designed higher to greatly increase the compressive force of the staple cartridge 11 on the anvil 12 as a whole, without increasing the compressive force of the tissue that needs to be retained.
As shown in fig. 10 and 11, in example 4, the protrusions 111 with different numbers per unit area are distributed on the surface of the staple cartridge 11, wherein the number of the protrusions 111 distributed per unit area Y near the distal side of the staple cartridge 11 is greater than the number of the protrusions 111 distributed per unit area J near the proximal side of the staple cartridge 11 (i.e., the size relationship between the total number M1 of the protrusions 111 per unit area on the proximal side J and the total number M2 of the protrusions 111 per unit area on the distal side Y is M1 < M2 < 22).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the near side J to the far side Y, the pressing force of the far side Y of the nail bin 11 is smaller than that of the near side J, the pressing force and the friction force of the far side Y of the nail bin 11 and the nail anvil 12 can be increased by arranging more protrusions 111 of the far side Y of the nail bin 11, and the pressing force and the friction force of the tissue are improved within the range of the tissue safe squeezing force.
As shown in fig. 12 and 13, in example 5, the protrusions 111 with different numbers per unit area are distributed on the surface of the nail bin 11, wherein the number of the protrusions 111 distributed per unit area W near the outer side of the nail bin 11 is greater than the number of the protrusions 111 distributed per unit area N near the inner side of the nail bin 11 (i.e., the relationship between the total number M3 of the protrusions 111 per unit area on the inner side N and the total number M4 of the protrusions 111 per unit area on the outer side W is M3 ═ 5 < M4 ═ 15).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the inner side N to the outer side W, the pressing force of the outer side W of the nail bin 11 is smaller than that of the inner side N, the pressing force and the friction force of the outer side W of the nail bin 11 can be increased by arranging more protrusions 111 on the outer side W of the nail bin 11, and the pressing force and the friction force on the tissue are improved within the range of the tissue safe squeezing force.
In example 6, as shown in fig. 14 and 15, the projections 111 with different cross-sectional areas are distributed on the surface of the staple cartridge 11, wherein the cross-sectional area of the Y-shaped projection 111 near the distal side of the staple cartridge 11 is larger than that of the J-shaped projection 111 near the proximal side of the staple cartridge 11 (i.e. the cross-sectional area S1 of one projection 111 at the distal side Y is larger than that of one projection 111 at the proximal side J is larger than that of S2).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the near side J to the far side Y, the pressing force of the far side Y of the nail bin 11 is smaller than that of the near side J, the cross section area of the bulge 111 of the far side Y of the nail bin 11 is larger, the pressing force and the friction force of the far side Y of the nail bin 11 and the nail anvil 12 can be increased, and the pressing force and the friction force of the tissue are improved within the range of the tissue safe squeezing force.
As shown in FIG. 16, in example 7, protrusions 111 with different cross-sectional areas are distributed on the surface of the staple cartridge 11, wherein the cross-sectional area of the protrusion 111 near the inner side N of the staple cartridge 11 is larger than the cross-sectional area of the protrusion 111 near the outer side W of the staple cartridge 11 (i.e. the cross-sectional area S3 of a certain protrusion 111 on the outer side W is larger than the cross-sectional area S4 of a certain protrusion 111 on the inner side N).
The design can well balance the tissue squeezing force of the nail anvil 12 of the nail bin 11, because the pressing force of the nail anvil 12 of the nail bin 11 is gradually transmitted from the inner side N to the outer side W, the pressing force of the outer side W of the nail bin 11 is smaller than that of the inner side N, the cross section area of the bulge 111 of the outer side W of the nail bin 11 is larger, the pressing force and the friction force of the outer side W of the nail bin 11 and the nail anvil 12 can be increased, and the pressing force and the friction force of the tissue are improved within the range of the tissue safe squeezing force.
As shown in fig. 17 and 18, in the embodiment 8, the surface of the nail bin 11 is distributed with the protrusions 111 with different shapes, wherein the nail bin 11 is divided into two sides by taking the cutting knife groove 112 of the nail bin 11 as a center line, the protrusion 111 on one side of the nail bin 11 is in a shape of a spine like a cone, and the protrusion 111 on the other side of the nail bin 11 is in a cylinder shape, as can be seen from the figure.
In most tissue resection operations, another part to be resected by the surgical stapler is the tissue (e.g. cancerated tissue) to be removed, and for this reason, the tissue of the part does not need to be considered to be pressed or punctured, and the protrusion 111 of the nail box 11 corresponding to the tissue of the side can be designed to be in a cone-like and spine-like shape, so that the pressing force or gripping force of the nail 12 of the nail box 11 as a whole is greatly enhanced, and the pressing damage of the tissue to be kept is not increased.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent should be defined by the appended claims.

Claims (9)

1. A surgical stapler with protruding nail bins with different characteristics comprises an execution part, wherein the execution part comprises a stapling opening and closing component, a cutting component, a connecting component and a shell component;
the nail closing and opening assembly comprises a nail bin, a nail anvil, a sewing nail, a nail pushing sheet and a sliding block, the nail bin and the nail anvil can be closed and opened in a rotating mode, and the sewing nail, the nail pushing sheet and the sliding block are movably arranged in the nail bin;
the cutting assembly comprises a cutting knife and a push rod, and the cutting knife is fixedly connected with the push rod;
the connecting assembly comprises a hinge and a steering connecting piece;
the shell assembly comprises an upper shell and a lower shell, wherein the upper shell is fixedly connected with the lower shell;
the stapling opening and closing assembly and the shell assembly are fixed together through a connecting assembly, and the cutting assembly is slidably fixed in the stapling opening and closing assembly and the shell assembly;
the nail bin is characterized in that the surface of the nail bin is distributed with bulges with different heights or different unit area quantities or different cross-sectional areas or different shapes.
2. The surgical stapler of claim 1, wherein the surface of the staple cartridge has protrusions of different heights distributed thereon, wherein the protrusions are higher near a distal side of the staple cartridge than near a proximal side of the staple cartridge, the distal side being a side closer to the head of the staple cartridge, and the proximal side being a side farther from the head of the staple cartridge.
3. The staple cartridge of claim 1, wherein said surface of said staple cartridge comprises protrusions of different heights, wherein said protrusions are higher near the outside of said staple cartridge than near the inside of said staple cartridge, said inside being the side near said staple cartridge cutting channel and said outside being the side away from said staple cartridge cutting channel.
4. The surgical stapler of claim 1, wherein the surface of the staple cartridge is distributed with protrusions having different heights, wherein the staple cartridge is divided into two sides by using the knife slot of the staple cartridge as a center line, and the height of the protrusion at one side of the staple cartridge is higher than the height of the protrusion at the other side of the staple cartridge.
5. The surgical stapler of claim 1, wherein the surface of the staple cartridge has a different number of protrusions per unit area distributed thereon, wherein the number of protrusions per unit area is greater proximate a distal side of the staple cartridge than proximate a proximal side of the staple cartridge, the distal side being a side proximate the head of the staple cartridge and the proximal side being a side distal to the head of the staple cartridge.
6. The surgical stapler of claim 1, wherein the surface of the staple cartridge has a different number of protrusions per unit area distributed thereon, wherein the number of protrusions per unit area is greater proximate the outside of the staple cartridge than proximate the inside of the staple cartridge, the inside being the side proximate the staple cartridge slot and the outside being the side distal from the staple cartridge slot.
7. The surgical stapler of claim 1, wherein the surface of the staple cartridge has protrusions of different cross-sectional areas distributed thereon, wherein the cross-sectional area of the protrusion is greater proximate the distal side of the staple cartridge than proximate the proximal side of the staple cartridge, the distal side being the side proximate the head of the staple cartridge and the proximal side being the side distal to the head of the staple cartridge.
8. The surgical stapler of claim 1, wherein the surface of the staple cartridge has protrusions of different cross-sectional areas distributed thereon, wherein the protrusion has a cross-sectional area closer to the inside of the staple cartridge than the protrusion has a cross-sectional area closer to the outside of the staple cartridge, the inside being the side closer to the staple cartridge cutting slot and the outside being the side away from the staple cartridge cutting slot.
9. The surgical stapler of claim 1, wherein the surface of the staple cartridge is distributed with protrusions of different shapes, wherein the staple cartridge is divided into two sides by using the cutter groove of the staple cartridge as a center line, the protrusion of one side of the staple cartridge is in a shape of a spine like a cone, and the protrusion of the other side of the staple cartridge is in a similar geometry like a cylinder, a cube, a ladder column, or the like.
CN202010828526.4A 2020-08-17 2020-08-17 Surgical stitching instrument with protruding nail bins with different characteristics Pending CN111870295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010828526.4A CN111870295A (en) 2020-08-17 2020-08-17 Surgical stitching instrument with protruding nail bins with different characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010828526.4A CN111870295A (en) 2020-08-17 2020-08-17 Surgical stitching instrument with protruding nail bins with different characteristics

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CN111870295A true CN111870295A (en) 2020-11-03

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CN202010828526.4A Pending CN111870295A (en) 2020-08-17 2020-08-17 Surgical stitching instrument with protruding nail bins with different characteristics

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113974737A (en) * 2021-12-14 2022-01-28 苏州法兰克曼医疗器械有限公司 Endoscope electric cutting anastomat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113974737A (en) * 2021-12-14 2022-01-28 苏州法兰克曼医疗器械有限公司 Endoscope electric cutting anastomat
CN113974737B (en) * 2021-12-14 2023-12-22 苏州法兰克曼医疗器械有限公司 Electric cutting anastomat for endoscope

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Application publication date: 20201103