Limiting structure of nail bin assembly of endoscope linear cutting anastomat

Abstract

The invention relates to a limiting structure of a nail bin assembly of an endoscope linear cutting anastomat. The limiting structure comprises a jaw assembly, an outer sleeve and a percussion assembly which are sequentially connected in the front-back direction. The jaw assembly comprises a nail abutting seat and a nail bin seat, and a nail bin is installed in the nail bin seat. A pushing block is arranged in the nail bin; a cutter is arranged in the outer sleeve, and a matching groove is formed in the bottom of the cutter; a matching block is arranged at the rear end of the pushing block; the length of the matching groove is L1; two limiting structures are arranged in the nail bin seat, the rear end of the nail bin is matched with the two limiting structures in a limiting mode, after the nail bin is clamped and fixed to the nail bin seat, the distance between the rear end face of the nail bin and the limiting structures is L5, and L5 is smaller than L1. According to the nail bin protecting cover, correct installation of the nail bin can be guaranteed on the premise that the nail bin protecting cover is not arranged, so that the time cost for learning the structure and the function of the nail bin protecting cover is reduced, an operator can install the nail bin more quickly during an operation to conduct the operation, and the operation efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a limiting structure for a cartridge assembly of a laparoscopic linear cutting stapler. Background Art

[0002] A linear cutting stapler is a medical device used for open surgery, laparoscopic dissection, resection and / or anastomosis of digestive tract tissues and lung tissues. The linear cutting stapler drives the anastomosis nails pre-placed in the assembly in multiple rows arranged parallel and offset from each other through a mechanical transmission device into the tissues to be anastomosed, cut and separated. After passing through the tissues, the anastomosis nails are blocked by the anvil in front and bend inward to form a staggered arrangement in a shape similar to "B", permanently anastomosing the two layers of tissues together. Since small blood vessels can pass through the gaps of the "B"-shaped anastomosis nails, it does not affect the blood supply to the anastomosis site and its distal end. This kind of anastomosis can achieve a stable, reasonably relaxed effect beneficial to the healing of the anastomosed tissues.

[0003] In Chinese Patent CN202221119213.2, a safety device for preventing secondary firing of a cartridge assembly of an electric laparoscopic stapler includes a base assembly, a cartridge assembly and a cutting assembly; wherein, a guide groove and a limiting pit located at the end of the guide groove are respectively provided on the cartridge seat; a limiting post is also provided on the side of the cutting knife. The cartridge of this patent is a disposable consumable. During the process of dissecting, resected and / or anastomosing digestive tract tissues and lung tissues, due to different surgical sites (such as stomach, intestine, blood vessels, etc.), different tissue thicknesses and the limitation of the cutting and anastomosis length of the cartridge, it may be necessary to replace the cartridge assembly multiple times according to the actual situation to adapt to different tissue types and lengths. It is found in the actual application of this patent that some operators who are not familiar with the structural relationship between the cartridge and the cartridge seat will ignore the step of installing the cartridge protection cover on the cartridge, and will also send the cartridge straight into the cartridge seat. This installation method is defined as an incorrect installation method herein.

[0004] Combined with Figure 9 and Figure 10 , in the correct installation method, first, it is necessary to confirm the cartridge size, select a cartridge protection cover that matches the cartridge size, install it on the top of the cartridge, so that the limiting strip at the bottom of the cartridge protection cover penetrates into the cartridge and abuts against the front end of the pushing block, and then the cartridge and the cartridge protection cover are sent into the cartridge seat at a certain angle and obliquely. Finally, align the buckle structures of the cartridge and the cartridge seat at an appropriate position and fix the buckle structures to fix the cartridge in the cartridge seat, ensuring a good cooperation relationship between the pushing block and the cutting knife; it should be noted that during this process, the cartridge will swing back and forth to align the buckle position. If it moves backward too much, it needs to be pulled back forward.

[0005] However, due to the incorrect installation method, the front end of the push block is not supported by the limit strip of the nail magazine protective cover, and the nail magazine is pushed into the nail magazine seat. In the process of aligning the buckle position, if the sliding stroke of the nail magazine is greater than the length of the matching groove of the cutting knife when the nail magazine is adjusted backward, the push block will be pushed forward by the cutting knife. At this time, if the nail magazine is pulled forward to align the buckle position to fix the relative position of the nail magazine and the nail magazine seat, the push block will not be able to cooperate with the matching groove. Finally, when used during surgery, the cutting knife is not supported by the push block. Once the firing is matched, the cutting knife will be moved forward by the firing and will enter the limit pit at the end of the guide groove, causing the firing process to be unable to continue, affecting the progress of the operation. The occurrence of this problem not only increases the doctor's operation time and increases the surgical costs for the patient, but may also cause secondary injuries to the patient during the operation, resulting in medical accidents. Summary of the invention

[0006] The purpose of the present invention is to provide a limiting structure for a stapler magazine assembly of a laparoscopic linear cutting stapler, which can allow the stapler to be directly installed on the stapler magazine seat without the cooperation of a stapler magazine protective cover, and can prevent the problem of a pushing block being pushed out by a cutting knife during installation, so that the stapler can be installed more correctly, effectively reducing the possibility of accidents during surgery, thereby allowing the surgery to be completed more quickly and effectively, and reducing the time of the surgery.

[0007] The present invention is achieved through the following technical solutions:

[0008] A limiting structure of a stapler assembly of a laparoscope linear cutting stapler, the main body of which is a linear cutting stapler, and the linear cutting stapler comprises a jaw assembly, an outer sleeve and a firing assembly which are sequentially connected in a front-to-back direction; the jaw assembly comprises a staple support seat and a stapler seat which are mutually hinged at the rear end, a stapler is installed in the stapler seat, and the stapler and the stapler seat are fixedly connected by a buckle structure;

[0009] A push block is provided in the nail magazine; a cutting knife is provided in the outer sleeve, the front end of the cutting knife extends into the nail magazine and is provided at the rear side of the pushing block, and a matching groove is provided at the bottom of the front side of the cutting knife; a matching block for supporting the matching groove at the bottom of the cutting knife is provided at the rear end of the pushing block; the length of the matching groove is L1;

[0010] Two limiting structures are provided in the nail magazine seat, and the two limiting structures are symmetrically arranged on the left and right sides of the rear part of the nail magazine seat. The rear end of the nail magazine is limited and cooperated with the two limiting structures, and when the nail magazine is clamped and fixed to the nail magazine seat, the distance between the rear end surface of the nail magazine and the limiting structure is L5, and L5<L1.

[0011] Compared with the previous technology, the beneficial effects of the present invention are:

[0012] 1. The present invention can ensure the correct installation of the cartridge without being equipped with a cartridge protection cover, thereby reducing the time cost of learning the structure and function of the cartridge protection cover, and enabling the surgeon to install the cartridge faster during the operation to perform the surgery, improving the surgical efficiency and safety.

[0013] 2. The present invention can enable the surgery to be completed more quickly and effectively during the operation, reduce the operation time to a certain extent, reduce unnecessary harm to the patient, and prevent the situation of a second operation due to surgical failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram when the cartridge is installed on the cartridge seat of the present invention;

[0015] Figure 2 It is a schematic structural diagram of the cooperation state between the cooperation block at the rear end of the pushing block and the cooperation groove at the front end of the cutting knife;

[0016] Figure 3 It is a schematic structural diagram of the cartridge seat of the present invention;

[0017] Figure 4 It is a schematic structural diagram of the cartridge seat in the prior art;

[0018] Figure 5 It is a schematic structural diagram of the linear cutting stapler of the present invention;

[0019] Figure 6 It is a schematic diagram of the length L1 of the cooperation groove structure;

[0020] Figure 7 It is a schematic diagram of the length L2 of the cartridge structure and the length L3 of the cartridge seat structure in the prior art;

[0021] Figure 8 It is a schematic diagram of the length L2 of the cartridge structure and the length L4 of the cartridge seat of the present invention;

[0022] Figure 9 It is a schematic structural diagram of the cooperation between the cartridge assembly and the cartridge protection cover in the prior art;

[0023] Figure 10 It is a comparison diagram of the correct and incorrect ways of replacing the cartridge assembly in the prior art.

[0024] Reference numeral description: 1 anvil, 2 cartridge seat, 21 limiting structure, 22 cartridge, 3 articulating head, 4 outer sleeve, 5 buckle, 6 rotary knob, 7 manual knife return button, 8 main housing base, 9 jaw release button, 10 fixed handle, 11 closing handle, 12 firing handle, 13 cutting knife, 131 cooperation groove, 14 pushing block, 141 cooperation block, 15 cartridge protection cover, 151 limiting strip. Detailed implementation mode

[0025] The following will describe the present invention in detail with reference to the attached drawings, but the protection scope of the present invention is not limited to the following:

[0026] As Figures 1 to 9 shown, a limiting structure of a staple cartridge assembly of a laparoscopic linear cutting stapler, the main body is a linear cutting stapler, and the linear cutting stapler includes a jaw assembly, an outer sleeve 4 and a firing assembly connected in sequence along the front-rear direction; the jaw assembly includes an anvil 1 and a staple cartridge seat 2 whose rear ends are hinged to each other, a staple cartridge 22 is installed in the staple cartridge seat 2, and the staple cartridge 22 is fixedly connected to the staple cartridge seat 2 through a snap structure;

[0027] A pushing block 14 is provided in the staple cartridge 22; a cutting knife 13 is provided in the outer sleeve 4, the front end of the cutting knife 13 extends into the staple cartridge 22 and is arranged behind the pushing block 14, and a mating groove 131 is provided at the bottom of the front side of the cutting knife 13; a mating block 141 for supporting the mating groove 131 at the bottom of the cutting knife 13 is provided at the rear end of the pushing block 14; the length of the mating groove 131 is L1;

[0028] Two limiting structures 21 are provided in the staple cartridge seat 2, and the two limiting structures 21 are symmetrically arranged on the left and right sides of the rear part of the staple cartridge seat 2. The rear end of the staple cartridge 22 is in limiting cooperation with the two limiting structures 21, and when the staple cartridge 22 is snap-fitted and fixed to the staple cartridge seat 2, the distance between the rear end face of the staple cartridge 22 and the limiting structure 21 is L5, and L5 < L1.

[0029] It should be noted that during the process of installing the staple cartridge 22 into the staple cartridge seat 2 of the present invention, if the staple cartridge 22 slides backward in the staple cartridge seat 2, the present invention can make the rear end of the staple cartridge 22 abut against the limiting structure 21, so that the maximum backward sliding stroke of the staple cartridge 22 during the adjustment of the snap structure is L5, and L5 is less than the length L1 of the mating groove 131; this structural design greatly reduces the sliding stroke of the staple cartridge 22 and prevents the cutting knife 13 from ejecting the pushing block 14 out of the mating groove 131 during the process of installing the staple cartridge 22 into the staple cartridge seat 2.

[0030] Furthermore, the limiting structure 21 is a convex block provided on the left and right side walls in the staple cartridge seat 2, and the front side surface of the convex block is an arc-shaped surface that is recessed backward.

[0031] As Figure 7 shown, in the prior art, the length of the staple cartridge 22 itself is L2, and the length for installing the staple cartridge 22 in the staple cartridge seat 2 is L3. After actual measurement, L3 - L2 = 2.7 ± 0.1 mm; and the mating groove 131 in front of the cutting knife 13 is as Figure 6As shown, through actual measurement, the length of the mating groove 131 is L1 = 1.27 ± 0.1 mm; in the case of incorrect installation method, that is, without carrying the cartridge protection cover, if the user pushes the cartridge 22 backward too much during the process of installing the cartridge 22 onto the cartridge seat 2 and aligning the buckle structure, it will cause the push block 14 in the cartridge 22 to be pushed forward by the cutting knife 13 with a relatively fixed position for a sliding stroke of 2.7 ± 0.1 mm, and this sliding stroke is greater than the length L1 of the mating groove; finally, during the intraoperative use, the mating groove 131 of the cutting knife 13 is not supported by the mating block 141 at the rear end of the push block 14. Once the firing and anastomosis occur, when the cutting knife 13 moves forward under firing, it will enter the limit pit at the end of the guiding groove, resulting in the inability to continue the firing process and affecting the surgical procedure.

[0032] It should be noted that, as Figure 8 shown, after the improvement of the present invention, on the cartridge seat 2 with the limit structure 21, the length for installing the cartridge 22 in the cartridge seat 2 is reduced from L3 to L4, and the length of the cartridge 22 itself remains L2. Through physical measurement, L4 - L2 = 0.8 ± 0.1 mm < L1; the present invention utilizes the limit structure 21 to enable the limit structure 21 to physically block the cartridge 22 when installing the cartridge 22. This structural design enables the linear cutting stapler of the present invention to ensure the correct installation of the cartridge 22 without being equipped with a cartridge protection cover, thereby reducing the learning cost for the user to learn the structure and function of the cartridge protection cover, and also enabling the surgeon to install the cartridge 22 faster during the operation to perform the surgery, improving the surgical efficiency and safety.

[0033] Further, the main body of the firing assembly is the main housing base 8. A buckle 5 for mating connection with the outer sleeve 4 is connected to the front end of the main housing base 8, and a control assembly for controlling the advancement or retraction of the cutting knife 13 is provided on the main housing base 8;

[0034] The control assembly includes a closing handle 11, a firing handle 12, a manual knife return button 7, and a jaw release button 9;

[0035] The closing handle 11 and the firing handle 12 are hinged to the bottom of the main housing base 8, and the manual knife return button 7 and the jaw release button 9 are provided on the surface of the main housing base 8.

[0036] Further, a fixed handle 10 is also provided at the bottom of the main housing base 8, and the fixed handle 10 is provided at the rear side of the closing handle 11 and the firing handle 12.

[0037] It should be noted that the overall structure of the firing assembly is a conventional technical means, so no more details will be described.

[0038] Further, a rotary knob 6 for rotatably sleeving the outer tube 4 is rotatably connected to the front end of the main housing base 8, and the front end of the rotary knob 6 is fixedly connected to the buckle 5.

[0039] It should be noted that the rotary knob 6 can drive the entire outer tube and the jaw assembly to rotate together, so as to realize the adjustment of the fitting angle between the anvil seat 1 and the cartridge seat 2.

[0040] Further, a joint head 3 is provided at the front end of the outer tube 4, and the joint head 3 is respectively hinged to the anvil seat 1 and the cartridge seat 2. The design of the joint head 3 is a conventional technical means, so no further description will be given.

[0041] Although the present invention is illustrated and described with specific embodiments and their alternative ways, it should be understood that various changes and modifications can be implemented as long as they do not deviate from the spirit of the present invention. Therefore, it should be understood that the present invention is not limited in any sense except by the limitations of the appended claims and their equivalent conditions.

Claims

1. A limiting structure for a cartridge assembly of a laparoscopic linear cutting stapler. The main body is a linear cutting stapler, which includes a jaw assembly, an outer sleeve (4), and a firing assembly connected in sequence along the front-rear direction; the jaw assembly includes an anvil (1) and a cartridge seat (2) hinged to each other at the rear end. A cartridge (22) is installed in the cartridge seat (2), and the cartridge (22) is fixedly connected to the cartridge seat (2) through a snap structure; A pushing block (14) is provided in the cartridge (22); a cutting knife (13) is provided in the outer sleeve (4). The front end of the cutting knife (13) extends into the cartridge (22) and is arranged at the rear side of the pushing block (14), and a mating groove (131) is provided at the bottom of the front side of the cutting knife (13); a mating block (141) for supporting the mating groove (131) at the bottom of the cutting knife (13) is provided at the rear end of the pushing block (14); the length of the mating groove (131) is L1; It is characterized in that: Two limiting structures (21) are provided in the cartridge seat (2), and the two limiting structures (21) are symmetrically arranged on the left and right sides of the rear part of the cartridge seat (2). The rear end of the cartridge (22) is in limiting cooperation with the two limiting structures (21), and when the cartridge (22) is snap-fitted and fixed to the cartridge seat (2), the distance between the rear end face of the cartridge (22) and the limiting structure (21) is L5, and L5 < L1.

2. The limiting structure of a staple cartridge assembly of an endoscopic linear cutting stapler according to claim 1, characterized in that: The limiting structure (21) is a convex block provided on the left and right side walls in the cartridge seat (2), and the front side surface of the convex block is an arc-shaped surface recessed backward.

3. The limiting structure of a staple cartridge assembly of an endoscopic linear cutting stapler according to claim 1, wherein: The main body of the firing assembly is a main housing base (8). A snap (5) for cooperating with the outer sleeve (4) is connected to the front end of the main housing base (8), and a control assembly for controlling the forward or backward movement of the cutting knife (13) is provided on the main housing base (8); The control assembly includes a closing handle (11), a firing handle (12), a manual knife retraction button (7), and a jaw release button (9); The closing handle (11) and the firing handle (12) are hinged to the bottom of the main housing base (8), and the manual knife retraction button (7) and the jaw release button (9) are arranged on the surface of the main housing base (8).

4. The limiting structure of a staple cartridge assembly of a laparoscopic linear cutting stapler according to claim 3, characterized in that: A fixed handle (10) is further provided at the bottom of the main housing base (8), and the fixed handle (10) is arranged at the rear side of the closing handle (11) and the firing handle (12).

5. The limiting structure of the staple cartridge assembly of the laparoscopic linear cutting stapler according to claim 1, characterized in that: A rotary knob (6) for rotating the outer sleeve (4) is rotatably connected to the front end of the main housing base (8), and the front end of the rotary knob (6) is fixedly connected to the snap (5).

Images