WO2020133167A1

WO2020133167A1 - Laparoscopic surgery instrument placing bag

Info

Publication number: WO2020133167A1
Application number: PCT/CN2018/124716
Authority: WO
Inventors: 袁松林
Original assignee: 袁松林
Priority date: 2018-12-27
Filing date: 2018-12-28
Publication date: 2020-07-02
Also published as: CN112587249A; CN109512524B; CN109512524A; CN112587249B

Abstract

A laparoscopic surgery instrument placing bag, comprising a functional block (1), wherein the interior of the functional block (1) is separately provided with a functional cavity (3) and power cavities (2); the inner wall of the functional cavity (3) is fixedly communicated with the upper surface of the functional block (1); the inner walls of multiple power cavities (2) all are fixedly communicated with the inner wall of the functional cavity (3); the inner wall of the functional cavity (3) is slidably connected with a power plate (4); the upper surface of the power plate (4) is fixedly connected with push rods (5); the surfaces of multiple push rods (5) all are slidably inserted into the inner walls of the corresponding power cavities (2). During actual use, medical instruments having long rods have different lengths, and multiple second functional rods (23) of the laparoscopic surgery instrument placing bag can slide in corresponding first functional rods (13) by means of movable blocks (22), so that a distance between a first functional cylinder (11) and a second functional cylinder (14) is changed; when the operating handle of the medical instrument having the long rod is fixed by a first protective block (15) and a second protective block (18), a transmission rod is fixed by multiple fixing blocks (8), and the degree of expansion and contraction of the second functional rods (23) in the first functional rod (13) is also determined and cannot be casually changed.

Description

Laparoscopic surgery bag

Technical field

The present invention relates to the technical field of medical devices, and more specifically, it relates to a laparoscopic surgery placement bag.

Background technique

Laparoscopic surgery is different from traditional open surgery. Due to the advancement of technology, it is possible to perform surgery through a smaller incision. Endoscopic surgery causes less tissue damage than traditional surgical procedures. During the implementation, through the keyhole-sized incision, the surgeon inserts a small light source, a camera and a surgical instrument, and guides the operation of the surgical instrument to perform the operation through the image transmitted to the monitor. Such surgical methods are collectively referred to as endoscopic surgery. Endoscopic surgery has many advantages, such as shorter hospital stay, less pain after surgery, being able to return to work earlier, and smaller scars.

During the implementation of endoscopic surgery, not only common surgical instruments such as scalpels, scissors, and tissue forceps are required, but also because of the need to operate in smaller wounds, the tissue scissors, titanium clamps, and curved types used Surgical instruments such as separating forceps are equipped with long rods, which is a major feature of endoscopic surgical instruments. These endoscopic surgical instruments with long rods are roughly composed of an operating handle, a transmission rod and a functional head. Many of these surgical instruments with long rods, as well as camera and imaging equipment, have precision structures inside. After the end of an operation, the instruments used should be strictly performed in accordance with the endoscopic cleaning operation specifications. First rinse with running water, remove the blood and dry it, then put in the multi-enzyme lotion and soak it for 10 minutes, then thoroughly clean the parts. The detachable part must be Disassemble and clean, and thoroughly wash the shaft, bend and lumen of the instrument with a soft brush. It is not possible to dismantle some parts to manually scrub and pick up dirt in the cracks with a brush, needle or sharp knife. Instruments with lumens are rinsed with a high-pressure water gun. Flowing water is used to carefully wash all parts of the instrument, then rinse with running water, and then blow dry with a high-pressure air gun. After cleaning, apply lubricant to form a stable protective layer on the surface of the instrument and store it properly for next use.

However, these surgical instruments with long rods currently do not have professional storage tools. These surgical instruments with long rods have different lengths and different functions, making storage more difficult. If the original packaging is used, not only the cleanliness is difficult to guarantee, but also the workload is huge and the space is huge, which is unrealistic. If it is convenient to stack them together, it is not only difficult to separate the instruments, which makes it difficult to access the next time, but also easily bumps and damages each other. Many instruments contain precision structures, and poor storage will not only affect the service life, but also affect the surgical effect and cause huge losses.

Summary of the invention

In view of the shortcomings of the prior art, the object of the present invention is to provide a laparoscopic surgery placement bag, which has the characteristics that various endoscopic surgical instruments with long rods can be properly stored.

To achieve the above objectives, the present invention provides the following technical solutions:

A laparoscopic surgery bag includes a functional block, and a functional cavity and a power cavity are respectively opened inside the functional block, the inner wall of the functional cavity is in fixed communication with the upper surface of the functional block, and the inner walls of multiple power cavities are in fixed communication with the inner wall of the functional cavity , The inner wall of the functional cavity is slidingly inserted with a power plate, the upper surface of the power plate is fixedly connected with a push rod, the surfaces of multiple push rods are slidingly inserted with the corresponding inner wall of the power cavity, and the inner walls of the multiple power cavity are slidingly inserted The power block has a power rod fixedly connected to the surface of the power block, one end of the power rod penetrates and extends out of the inner side wall of the functional cavity, one end of the multiple power rods are fixedly connected to the fixed block, and the inner bottom wall of the functional block is provided with the first power The inner wall of the power hole is screwed with a threaded rod, and the lower surface of the power plate is provided with a second power hole. The inner wall of the second power hole is fixedly connected with a first bearing, and the inner ring of the first bearing is fixedly connected to one end of the threaded rod. The other end of the threaded rod is fixedly connected with a rotating block.

The upper surface of the functional block is screw-connected with the first functional cylinder. The inner wall of the first functional cylinder is in fixed communication with the inner wall of the functional cavity. The upper surface of the first functional cylinder is fixedly connected with a protection bag and a first functional rod. The inner wall of the first functional cylinder is fixedly connected, the upper end of the protective bag is fixedly connected with the second functional cylinder, and the inner bottom wall of the second functional cylinder is fixedly connected with the inner wall of the protective bag.

A first protection block is fixedly connected to the inner wall of the second functional cylinder, a first protection cavity is opened on the upper surface of the first protection block, the inner wall of the first protection cavity is fixedly connected to the inner wall of the protection bag, and the surface of the second functional cylinder is threaded The protective cover is provided with a second bearing fixedly connected to the inner side wall of the protective cover, a second protective block is fixedly connected to the inner ring of the second bearing, and a second protective cavity is opened on the lower surface of the second protective block.

Further, the manufacturing material of the fixed block includes natural rubber, and hydraulic oil is provided in the cavity between the push rod and the power block.

Further, the surface of the functional block is screwed to the base, and the lower surface of the base is fixedly connected to a non-slip mat.

Further, a plurality of first functional rods are all provided with a telescopic cavity, and the inner wall of the telescopic cavity is in fixed communication with the upper surface of the first functional rod.

Further, a movable block is slidingly inserted into the inner wall of the telescopic cavity, and a second functional rod is fixedly connected to the upper surface of the movable block.

Further, the upper surface of the first functional rod is fixedly connected to the limiting ring, the surface of the second functional rod is slidingly inserted into the inner wall of the limiting ring, and the upper ends of the plurality of second functional rods are all fixedly connected to the lower surface of the second functional barrel.

Further, a suspension rod is fixedly connected to the upper surface of the protective cover, and a suspension ring is fixedly connected to the upper end of the suspension rod.

Furthermore, the inner wall of the protective bag is fixedly connected with an antibacterial layer. The antibacterial layer is made of chitin. The protective bag is provided with a reinforced cavity, and the reinforced rings are fixedly connected to the inner walls of the multiple reinforced cavity.

Further, a protective layer is fixedly connected to the surface of the protective bag, the protective layer is made of natural rubber, and a protective block is fixedly connected to the surface of the protective layer.

Further, the manufacturing method of chitin in the claims is: S1, prepare a number of crustacean shells, a concentration of 4mol/L hydrochloric acid leaching solution, a concentration of 5mol/L sodium hydroxide treatment solution; S2, the crustaceans The animal shell was crushed into a powder with a diameter of less than 1 mm. After adding 5 times hydrochloric acid leaching solution, the mixture was stirred at a temperature of 50°C and immersed for 20 min. Then it was centrifuged at 2500 rpm and the supernatant was decanted. Repeat 3 times; S3, add 5 times of sodium hydroxide treatment solution, water bath at 95°C for 30 min, centrifuge at 3000 rpm after cooling, pour out supernatant, repeat three times; S4, add demineralized water to Immerse it at 60℃ for 30min, wash, dry, and crush to obtain chitin powder for antibacterial layer.

In summary, the present invention has the following beneficial effects:

1. By setting the first functional rod, a plurality of first functional rods are all provided with a telescopic cavity, and the inner wall of the telescopic cavity is in fixed communication with the upper surface of the first functional rod, so that it has a long rod that can adapt to and protect different lengths The characteristics of the medical devices in the actual use process, the length of the medical device with a long rod is different, and the plurality of second functional rods of the present invention can slide inside the corresponding first functional rod through the movable block, thereby changing the first The distance between a functional cylinder and a second functional cylinder, when the operating handle of a medical device with a long rod is fixed by the first protective block and the second protective block, the transmission rod is fixed by a plurality of fixed blocks, the second functional rod is at The degree of internal expansion and contraction of the first functional rod is determined and will not be changed arbitrarily. The first functional rod and the second functional rod can be made of metal, which not only increases the strength of the present invention, has a longer service life, but also plays a certain role The effect of protecting internal medical devices, when the staff accidentally falls or crashes when using the present invention, the first functional rod and the second functional rod can resist part of the impact force, so that the present invention can adapt and protect different lengths of belt Features of long-bar medical devices.

2. By setting a protective bag, the inner wall of the protective bag is fixedly connected with an antibacterial layer. The antibacterial layer is made of chitin, which ensures the high cleanliness of the medical devices with long rods that are kept in storage. The medical devices with long rods are put into the invention after cleaning, disinfecting, sterilizing and applying lubricant, and the self-cleaning degree is extremely high, and the antibacterial layer is made of chitin, which is also called chitosan and has good inhibition. The effect of bacterial growth makes it difficult for bacteria to grow inside the present invention, thereby ensuring the cleanliness of the medical equipment with long rods stored, so that the present invention has the characteristics of ensuring that the medical equipment with long rods stored are highly clean.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the structure of the present invention;

2 is an enlarged view of area A in FIG. 1 of the present invention;

3 is a perspective view of the base structure of the present invention;

4 is a perspective view of the structure of the fixed block of the present invention;

5 is a cross-sectional view of the protective bag structure of the present invention;

6 is a top view of the structure of the protective bag of the present invention;

7 is a schematic diagram of the functional block structure of the present invention after the fixed block is gathered;

8 is a schematic view of the structure of a endoscopic surgical instrument with a long rod.

In the picture: 1. Function block; 2. Power cavity; 3. Function cavity; 4. Power board; 5. Push rod; 6. Power block; 7. Power rod; 8. Fixed block; 9. Threaded rod; 10. Rotating block; 11. The first functional tube; 12. The protective bag; 13. The first functional rod; 14. The second functional tube; 15. The first protective block; 16. The first protective cavity; 17. The protective cover; 18. Second protection block; 19, second protection cavity; 20, base; 21, non-slip mat; 22, movable block; 23, second function rod; 24, limit ring; 25, suspension rod; 26, suspension ring; 27 , Antibacterial layer; 28, reinforced ring; 29, protective layer; 30, protective block.

detailed description

Example:

The present invention will be further described in detail below with reference to FIGS. 1-8.

A laparoscopic surgery placement bag, as shown in FIGS. 1-4, includes a functional block 1, a surface of the functional block 1 is screwed to a base 20, and a lower surface of the base 20 is fixedly connected to a non-slip pad 21 to ensure the stability of the present invention ; The functional block 1 is respectively provided with a functional cavity 3 and a power cavity 2, the inner wall of the functional cavity 3 is in fixed communication with the upper surface of the functional block 1, the inner walls of multiple power cavities 2 are in fixed communication with the inner wall of the functional cavity 3, the functional cavity 3 A power board 4 is slidingly inserted into the inner wall, and a push rod 5 is fixedly connected to the upper surface of the power board 4. The surfaces of the multiple push rods 5 are slidingly inserted into the corresponding inner walls of the power chamber 2 and the inner walls of the multiple power chambers 2 are sliding A power block 6 is inserted, a power bar 7 is fixedly connected to the surface of the power block 6, one end of the power bar 7 penetrates and extends out of the inner side wall of the functional cavity 3, and a fixed block 8 is fixedly connected to one end of a plurality of power bars 7 The manufacturing material of the block 8 includes natural rubber, the cavity between the push rod 5 and the power block 6 is provided with hydraulic oil; the inner bottom wall of the functional block 1 is provided with a first power hole, and the inner wall of the power hole is screwed with a threaded rod 9. The lower surface of the power board 4 is provided with a second power hole. The inner wall of the second power hole is fixedly connected with a first bearing. The inner ring of the first bearing is fixedly connected to one end of the threaded rod 9 and the other end of the threaded rod 9 is fixedly connected. There are spin blocks 10;

The upper surface of the functional block 1 is screw-connected with the first functional cylinder 11, the inner wall of the first functional cylinder 11 is in fixed communication with the inner wall of the functional cavity 3, and the upper surface of the first functional cylinder 11 is fixedly connected with the protection bag 12 and the first functional rod respectively 13. A plurality of first functional rods 13 are all provided with a telescopic cavity, and the inner wall of the telescopic cavity is in fixed communication with the upper surface of the first functional rod 13; the inner wall of the telescopic cavity is slidingly connected with a movable block 22, and the upper surface of the movable block 22 The second functional rod 23 is fixedly connected; the upper surface of the first functional rod 13 is fixedly connected to the limit ring 24, the surface of the second functional rod 23 is slidably inserted into the inner wall of the limit ring 24, and the upper ends of the plurality of second functional rods 23 Both are fixedly connected to the lower surface of the second functional barrel 14; the inner wall of the protective bag 12 is in fixed communication with the inner wall of the first functional barrel 11, the upper end of the protective bag 12 is fixedly connected to the second functional barrel 14, the inner bottom wall of the second functional barrel 14 It is fixedly connected to the inner wall of the protective bag 12; as shown in FIGS. 5-6, the inner wall of the protective bag 12 is fixedly connected with an antibacterial layer 27. The antibacterial layer 27 is made of chitin, and the manufacturing method of the chitin is: S1, preparing crustaceans Several shells, a concentration of 4mol/L hydrochloric acid leaching solution, a concentration of 5mol/L sodium hydroxide treatment solution; S2, Crustacean shell crushed into a powder with a diameter of less than 1mm, add 5 times hydrochloric acid leaching solution at 50 ℃ After stirring and soaking for 20 minutes at a temperature of 20°C, use a centrifuge, centrifuge at a rotation speed of 2500 rpm, pour out the supernatant and repeat 3 times; S3, add 5 times of sodium hydroxide treatment solution at 95℃ Water bath for 30 minutes at temperature, centrifuge at 3000 rpm after cooling, pour out the supernatant, and repeat three times; S4, add demineralized water and soak at 60 ℃ for 30 minutes, wash, dry and crush to obtain carapace The plain powder is used to make the antibacterial layer 27; the protective bag 12 is provided with a reinforced cavity, and the inner walls of the multiple reinforced cavities are fixedly connected with a reinforcing ring 28, which can increase the overall strength of the protective bag 12; the surface of the protective bag 12 is fixedly connected The protective layer 29 is made of natural rubber, and the protective layer 30 is fixedly connected to the surface of the protective layer 29, which can prevent the protective bag 12 from being scratched by a sharp device without affecting the flexibility of the protective bag 12;

A first protection block 15 is fixedly connected to the inner wall of the second functional cylinder 14, and a first protection cavity 16 is opened on the upper surface of the first protection block 15, the inner wall of the first protection cavity 16 is in fixed communication with the inner wall of the protection bag 12, the second function A protection cover 17 is screwed on the surface of the barrel 14, a suspension rod 25 is fixedly connected to the upper surface of the protection cover 17, and a suspension ring 26 is fixedly connected to the upper end of the suspension rod 25; a second bearing is fixedly connected to the inner side wall of the protection cover 17 A second protection block 18 is fixedly connected to the inner ring of the two bearings, and a second protection cavity 19 is opened on the lower surface of the second protection block 18;

By providing the first functional rod 13, a plurality of first functional rods 13 are all provided with a telescopic cavity, and the inner wall of the telescopic cavity is in fixed communication with the upper surface of the first functional rod 13, so that it can adapt to and protect different lengths. The characteristics of the medical device of the rod, in actual use, the length of the medical device with a long rod is different, and the plurality of second functional rods 23 of the present invention can be moved to the corresponding first functional rod 13 through the movable block 22 Slide inside to change the distance between the first functional barrel 11 and the second functional barrel 14, when the operating handle of the medical device with a long rod is fixed by the first protective block 15 and the second protective block 18, the transmission rod is The fixing block 8 is fixed, and the degree of expansion and contraction of the second functional rod 23 within the first functional rod 13 is determined and will not be changed at will. The first functional rod 13 and the second functional rod 23 can be made of metal, which not only increases the cost The invention has its own strength, longer service life, and can play a certain role in protecting internal medical devices. When the staff accidentally falls or crashes when using the invention, the first functional rod 13 and the second functional rod 23 can resist Part of the impact force, so that the invention has the characteristics of adapting to and protecting medical devices with long rods of different lengths;

The protective bag 12 is provided, and the inner wall of the protective bag 12 is fixedly connected with an antibacterial layer 27. The antibacterial layer 27 is made of chitin, so as to ensure that the medical equipment with long rods kept in storage is highly clean. In actual use The medical device with a long rod is placed in the present invention after cleaning, disinfecting, sterilizing, and applying lubricant. The self-cleaning degree is extremely high, and the antibacterial layer 27 is made of chitin, which is also called chitosan. The good effect of inhibiting the growth of bacteria makes the inside of the present invention difficult to breed bacteria, thereby ensuring the cleanliness of the medical equipment with long rods stored, so that the present invention ensures that the medical equipment with long rods stored are highly clean specialty.

Working principle: In the actual use process, we can hold the first functional cylinder 11 with one hand, pinch the rotating block 10 with the other hand, and turn the rotating block 10 clockwise to make the threaded rod 9 move downward, and the threaded rod 9 drives The power board 4 and the push rod 5 move downward, so that the multiple power blocks 6, the power rod 7 and the fixed block 8 all move in the direction of the push rod 5, at this time the gap between the multiple fixed blocks 8 is the largest, as shown in FIG. 8 As shown, the surgical instrument with a long rod is inserted into the protective bag 12 from the first protective cavity 16, so that the functional head of the surgical instrument with a long rod is placed in the functional cavity 3, and the transmission rod is placed in the protective bag 12 to operate The handle is placed in the first protective cavity 16, and we rotate the rotating block 10 counterclockwise. According to the above transmission relationship, as shown in FIG. 7, a plurality of fixing blocks 8 fix the transmission rod of the surgical instrument with a long rod, we will The protective cover 17 is sleeved on the operating handle of the surgical instrument with a long rod, so that the operating handle is caught in the second protective cavity 19, and the protective cover 17 is rotated to make the protective cover 17 and the second functional cylinder 14 threadedly connected. The surgical instruments with long rods are properly stored inside the present invention. If you need to save space, you can unscrew the base 20 and hang the hanging ring 26 on the hook. If you need to place it on the table or the ground, rotate the base 20 on the surface of the functional block 1 Just tight, the first protection block 15 and the second protection block 18 can be made of silicone, has a certain elasticity, can adapt to the operation handle of surgical instruments with long rods of different shapes and sizes, and then make the first protection cavity 16 And the second protective cavity 19 can accommodate the operating handle of most surgical instruments with long rods, and the volume of the functional cavity 3 above the power board 4 should be adapted to the functional head of most surgical instruments with long rods to fix the block 8 It is better that the function head does not contact the power board 4 after fixing the transmission rod.

This specific embodiment is merely an explanation of the present invention, and it is not a limitation of the present invention. A person skilled in the art may make modifications without creative contribution to this embodiment after reading this specification, but as long as the rights of the present invention Within the scope of the requirements are protected by patent law.

Claims

A laparoscopic surgery bag includes a functional block (1), which is characterized in that: a functional cavity (3) and a power cavity (2) are respectively opened inside the functional block (1), and the functional cavity (3) The inner wall of the functional block (1) is in fixed communication with the upper surface of the functional block (1), the inner walls of the plurality of power chambers (2) are in fixed communication with the inner wall of the functional chamber (3), and the inner wall of the functional chamber (3) is slidingly connected with a power board (4), the upper surface of the power board (4) is fixedly connected with a push rod (5), a plurality of surfaces of the push rod (5) are slidingly inserted into the inner wall of the corresponding power chamber (2), and a plurality of A power block (6) is slidingly inserted into the inner wall of the power cavity (2), a power rod (7) is fixedly connected to the surface of the power block (6), and one end of the power rod (7) penetrates and extends out A fixed block (8) is fixedly connected to one end of each of the plurality of power rods (7) on the inner side wall of the functional cavity (3), and a first power hole is provided in the inner bottom wall of the functional block (1). A threaded rod (9) is threadedly connected to the inner wall of the hole, and a second power hole is opened on the lower surface of the power board (4), and an inner wall of the second power hole is fixedly connected with a first bearing, and the first bearing The inner ring is fixedly connected with one end of the threaded rod (9), and the other end of the threaded rod (9) is fixedly connected with a rotating block (10);

The upper surface of the functional block (1) is screwed with a first functional cylinder (11), the inner wall of the first functional cylinder (11) is in fixed communication with the inner wall of the functional cavity (3), and the first functional cylinder (11) ) The upper surface of which is fixedly connected with a protective bag (12) and a first functional rod (13), the inner wall of the protective bag (12) is in fixed communication with the inner wall of the first functional cylinder (11), and the protective bag (12) The upper end of the is fixedly connected with a second functional cylinder (14), the inner bottom wall of the second functional cylinder (14) is in fixed communication with the inner wall of the protective bag (12);

A first protection block (15) is fixedly connected to the inner wall of the second functional cylinder (14), and a first protection cavity (16) is opened on the upper surface of the first protection block (15), and the first protection cavity The inner wall of (16) is in fixed communication with the inner wall of the protective bag (12), a protective cover (17) is screwed on the surface of the second functional cylinder (14), and a second In the bearing, a second protection block (18) is fixedly connected to the inner ring of the second bearing, and a second protection cavity (19) is opened on the lower surface of the second protection block (18).
The laparoscopic surgery placement bag according to claim 1, characterized in that: the manufacturing material of the fixing block (8) includes natural rubber, and the cavity between the push rod (5) and the power block (6) Hydraulic oil is provided in the body.
The storage bag for endoscopic surgery according to claim 1, characterized in that: the surface of the functional block (1) is screwed with a base (20), and the lower surface of the base (20) is fixedly connected with a non-slip pad (twenty one).
The storage bag for endoscopic surgery according to claim 1, characterized in that: a plurality of first functional rods (13) are all provided with a telescopic cavity, and the inner wall of the telescopic cavity and the first functional rod ( 13) The upper surface is fixedly connected.
The placement bag for endoscopic surgery according to claim 4, wherein a movable block (22) is slidingly inserted into the inner wall of the telescopic cavity, and a second block is fixedly connected to the upper surface of the movable block (22) Function lever (23).
The laparoscopic surgery placement bag according to claim 5, characterized in that: the upper surface of the first functional rod (13) is fixedly connected to a limit ring (24), and the surface of the second functional rod (23) Slidingly inserted into the inner wall of the limit ring (24), the upper ends of the plurality of second functional rods (23) are all fixedly connected to the lower surface of the second functional cylinder (14).
The storage bag for endoscopic surgery according to claim 1, characterized in that: a hanging rod (25) is fixedly connected to the upper surface of the protective cover (17), and an upper end of the hanging rod (25) is fixedly connected to Hanging ring (26).
The laparoscopic surgery placement bag according to claim 1, characterized in that: the inner wall of the protective bag (12) is fixedly connected with an antibacterial layer (27), and the material for manufacturing the antibacterial layer (27) includes chitin, A reinforcement cavity is opened inside the protection bag (12), and the inner walls of the plurality of reinforcement cavities are all fixedly connected with a reinforcement ring (28).
The laparoscopic surgery placement bag according to claim 1, characterized in that: a protective layer (29) is fixedly connected to the surface of the protective bag (12), and the protective layer (29) is made of natural rubber A protective block (30) is fixedly connected to the surface of the protective layer (29).
The laparoscopic surgery placement bag according to claim 8, characterized in that: the manufacturing method of chitin in claim 8 is: S1, preparing a number of crustacean shells, a concentration of 4mol/L hydrochloric acid leaching solution , 5mol/L sodium hydroxide treatment solution; S2, crush the crustacean shell into a powder with a diameter of less than 1mm, add 5 times hydrochloric acid leaching solution and stir at 50℃ for 20min, use a centrifuge, Centrifuge at 2500 rpm/min, pour out the supernatant and repeat 3 times; S3, add 5 times of sodium hydroxide treatment solution, water bath at 95 ℃ for 30 min, and cool at 3000 rpm Centrifuge at a rotating speed, pour out the supernatant, and repeat three times; S4. Add demineralized water and soak for 30 min at a temperature of 60°C. Wash, dry, and pulverize to obtain chitin powder for the antibacterial layer (27).