A coating device and method for use on a visual double-lumen bronchial tube

Abstract

The application is a coating device and method applied to a visual double-lumen bronchial cannula, belonging to the technical field of coating on visual double-lumen bronchial cannula, comprising a plasma cleaning mechanism and a vacuum coating mechanism, the plasma cleaning mechanism comprises a vacuum treatment box, the inside of the vacuum treatment box is placed with a visual double-lumen bronchial cannula, the inner bottom wall of the vacuum treatment box is rotationally connected with a support, and the top of the support supports the visual double-lumen bronchial cannula. The application solves the problems that the coating is easy to fall off, the overall thickness is uneven, and local sputum adhesion occurs when the coating material is directly sprayed on the surface of the product. In the application, the surface of the visual double-lumen bronchial cannula is treated by the plasma cleaning mechanism, and a hydrophilic group is generated on the surface of the visual double-lumen bronchial cannula, thereby improving the hydrophilicity of the surface of the visual double-lumen bronchial cannula. There are hydrophilic and hydrophobic parts in the coating material.

Description

Technical Field

[0001] This invention belongs to the field of coating technology for visual dual-lumen endotracheal tubes, specifically relating to a coating device and method for visual dual-lumen endotracheal tubes. Background Technology

[0002] A double-lumen endotracheal tube includes a main endotracheal tube and a bronchial tube. The main endotracheal tube has a cuff located outside its lower end, and the bronchial tube has a cuff located outside its lower end. A double-lumen endotracheal tube is one type of endotracheal tube, characterized by its ability to temporarily separate the ventilation of the left and right main bronchi. It allows for the inhalation of anesthetic gas through both lumens, or for anesthesia and ventilation using only the lateral lumens. Secretions can be suctioned separately at any time. The lens, being inside or outside the body, is subject to temperature differences, which can cause the lens to fog up, resulting in blurred vision and affecting practical use. Respiratory sputum is sticky and adheres to the outside of the tube, leading to incomplete suctioning. A common method is to use physical spraying to apply a coating material to the product surface.

[0003] However, directly spraying the coating material onto the product surface can lead to problems such as easy coating peeling, uneven overall thickness, and localized adhesion of sputum. Therefore, a coating device and method for use on visual dual-lumen endotracheal tubes are proposed. Summary of the Invention:

[0004] This invention provides a coating device and method for use on visual dual-lumen endotracheal cannulas, which aims to solve the problems of easy coating peeling, uneven overall thickness, and local adhesion of sputum when coating materials are directly sprayed onto the product surface.

[0005] This invention provides a coating device and method for use on a visual dual-lumen endotracheal cannula, comprising a plasma cleaning mechanism and a vacuum coating mechanism. The plasma cleaning mechanism includes a vacuum treatment chamber, inside which the visual dual-lumen endotracheal cannula is placed. A support is rotatably connected to the inner bottom wall of the vacuum treatment chamber, and the top of the support supports the visual dual-lumen endotracheal cannula. A ventilation pipe is installed at the bottom of the vacuum treatment chamber, and a vacuum machine is installed at one end of the ventilation pipe. The top of the vacuum treatment chamber... A low-temperature plasma generator is installed, and a fourth gas pipe is installed at the top of the low-temperature plasma generator. Three pneumatic diaphragm three-way valves are installed sequentially on the fourth gas pipe. The three pneumatic diaphragm three-way valves are respectively connected to the first gas pipe, the second gas pipe, and the third gas pipe. A vacuum gauge, a mass flow meter, and a manual shut-off valve are installed sequentially on the top of the fourth gas pipe away from the pneumatic diaphragm three-way valves and on the first, second, and third gas pipes. The tops of the first, second, third, and fourth gas pipes are respectively connected to the first, second, third, and fourth gas cylinders.

[0006] Furthermore, the vacuum coating mechanism includes a coating box, a sprayer, a second vent pipe, a second vacuum machine, and a fifth air pipe. The bottom of the coating box is provided with the second vent pipe, and one end of the second vent pipe is provided with the second vacuum machine. The inner side of the coating box contains a visible double-lumen bronchus tube that has been treated by a plasma cleaning mechanism. The inner bottom wall of the coating box is rotatably connected to a bracket, and the upper part of the bracket contains the visible double-lumen bronchus tube. The top of the coating box is provided with a sprayer, and the top of the sprayer is provided with a fifth air pipe. The fifth air pipe is provided with a pneumatic diaphragm valve, a vacuum gauge, a mass flow meter, and a manual shut-off valve. The top of the fifth air pipe is connected to a container bottle, and the inner side of the container bottle is coated with material.

[0007] By adopting the above method, the sprayer applies coating material to the surface of the visual double-lumen endotracheal tube.

[0008] Furthermore, the inner side of gas cylinder one contains ammonia, the inner side of gas cylinder two contains oxygen, the inner side of gas cylinder three contains a mixture of hydrogen and nitrogen, and the inner side of gas cylinder four contains argon.

[0009] By adopting the above scheme, the release and shut-off of gas in gas cylinders 2, 1, 4 and 3 are controlled by using manual shut-off valves and pneumatic diaphragm three-way valves.

[0010] Furthermore, by manually shutting off the gas and controlling the gas flow into the inner cavity of the coating chamber in sequence, polar groups are deposited on the surface of the visible dual-lumen endotracheal cannula. The steps are as follows:

[0011] ① Place the visual double-lumen endotracheal tube into the inner cavity of the vacuum treatment chamber, then seal the vacuum treatment chamber and close all manual shut-off valves and pneumatic diaphragm three-way valves.

[0012] ② Start vacuum machine one. Vacuum machine one draws gas from the inner cavity of the vacuum treatment box through the vent pipe one, so that the inner cavity of the vacuum treatment box is evacuated and the gas pressure in the inner cavity of vacuum machine one is lower than 0.1Pa. Then continue to run vacuum machine one.

[0013] ③ Open all pneumatic diaphragm three-way valves, and simultaneously open the manual shut-off valves connected to air pipe one, air pipe three, and air pipe four, allowing the gas in air cylinder one, air cylinder three, and air cylinder four to enter the low-temperature plasma generator. Then open the manual shut-off valve connected to air pipe two, allowing the gas in air cylinder two to enter. The internal pressure of the vacuum treatment chamber is maintained at 25-400 Pa. The operation of the low-temperature plasma generator causes these gases to generate charged plasma. These plasmas enter the internal cavity of the vacuum treatment chamber and come into contact with the surface of the visible dual-lumen bronchial cannula, thoroughly cleaning the surface of the visible dual-lumen bronchial cannula. During the contact process, a reaction occurs, generating polar groups on the surface of the visible dual-lumen bronchial cannula. The polar groups are hydroxyl functional groups or amino functional groups, which significantly increase the surface energy and wettability of the material surface.

[0014] Furthermore, the coating material is an acrylic-polystyrene-polydimethylsiloxane copolymer.

[0015] By adopting the above-mentioned method, acrylic-polystyrene-polydimethylsiloxane copolymer as a coating can reduce sputum adhesion.

[0016] Furthermore, a coating material is sprayed onto the surface of the visual double-lumen endotracheal cannula after it has been treated by the plasma cleaning mechanism using a vacuum coating mechanism, so that a dense coating is formed on the surface of the visual double-lumen endotracheal cannula. The steps are as follows:

[0017] ① Place the visual double-lumen endotracheal tube, which has been treated by the plasma cleaning mechanism, into the inner cavity of the coating box, and close the manual shut-off valve and pneumatic diaphragm valve on the endotracheal tube, and completely seal the inner cavity of the coating box.

[0018] ② Start vacuum machine two. Vacuum machine two will evacuate the inner cavity of the coating box through air pipe two, so that the air pressure in the inner cavity of the coating box is lower than 0.1 Pa.

[0019] ③ Open the pneumatic diaphragm valve and manual shut-off valve on the endotracheal tube in sequence. Under the action of pressure difference, the coating material in the container is sprayed into the inner cavity of the coating box through the endotracheal tube and the sprayer. Due to the extremely low air pressure in the coating box, the coating material turns into vapor molecules that fill the inner cavity of the coating box. The vapor molecules of the coating material come into full contact with the surface of the visual double-lumen endotracheal tube after being treated by the plasma cleaning mechanism. Since the surface energy and wettability of the material surface of the visual double-lumen endotracheal tube after being treated by the plasma cleaning mechanism are significantly increased, the vapor molecules of the coating material effectively wet the material surface and better fill the micro-molecular structure through capillary action, finally forming a dense coating that is not easy to fall off on the surface of the visual double-lumen endotracheal tube.

[0020] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects:

[0021] In this invention, the surface of the visual dual-lumen endotracheal cannula is treated with a plasma cleaning mechanism, generating hydrophilic groups on the surface of the cannula, thereby increasing the hydrophilicity of the surface. Typically, coating materials contain both hydrophilic and hydrophobic portions. By bonding the hydrophilic groups on the surface of the visual dual-lumen endotracheal cannula to the surface of the lens requiring anti-fog treatment, the hydrophilicity of the cannula surface is improved. The overall thickness of the coating is more uniform, preventing localized adhesion of sputum, and significantly increasing the adhesion between the coating and the surface of the visual dual-lumen endotracheal cannula.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the plasma cleaning mechanism of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the vacuum coating mechanism of the present invention.

[0026] Reference numerals in the attached diagram: 1. Vacuum processing chamber; 2. Visual dual-chamber endotracheal tube; 3. Low-temperature plasma generator; 4. Pneumatic diaphragm three-way valve; 5. Gas tube one; 6. Vacuum gauge; 7. Mass flow meter; 8. Manual shut-off valve; 9. Gas cylinder two; 10. Gas tube two; 11. Gas tube three; 12. Gas cylinder one; 13. Gas tube four; 14. Ventilation tube one; 15. Vacuum machine one; 16. Coating box; 17. Sprayer; 18. Pneumatic diaphragm valve; 19. Container bottle; 20. Gas cylinder four; 21. Gas cylinder three; 22. Ventilation tube two; 23. Vacuum machine two; 24. Gas tube five; 25. Magnetohydrodynamic sealer; 26. Filter. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1-2 As shown, this invention proposes a coating device and method for use on a visual dual-lumen endotracheal cannula, including a plasma cleaning mechanism and a vacuum coating mechanism. The plasma cleaning mechanism includes a vacuum treatment chamber 1, on the inner side of which the visual dual-lumen endotracheal cannula 2 is placed. A support is rotatably connected to the inner bottom wall of the vacuum treatment chamber 1, and the top of the support supports the visual dual-lumen endotracheal cannula 2. A ventilation pipe 14 is installed at the bottom of the vacuum treatment chamber 1, and a vacuum generator 15 is installed at one end of the ventilation pipe 14. A low-temperature plasma generator is installed at the top of the vacuum treatment chamber 1. 3. The top of the low-temperature plasma generator 3 is provided with a gas pipe 4 13. Three pneumatic diaphragm three-way valves 4 are sequentially provided on the gas pipe 4 13. The three pneumatic diaphragm three-way valves 4 are respectively connected to gas pipe 1 5, gas pipe 2 10 and gas pipe 3 11. A vacuum gauge 6, a mass flow meter 7 and a manual shut-off valve 8 are sequentially provided on the top of the gas pipe 4 13 away from the pneumatic diaphragm three-way valves 4 and on gas pipe 1 5, gas pipe 2 10 and gas pipe 3 11. The tops of gas pipe 1 5, gas pipe 2 10, gas pipe 3 11 and gas pipe 4 13 are respectively connected to gas cylinder 1 12, gas cylinder 2 9, gas cylinder 3 21 and gas cylinder 4 20.

[0029] The vacuum coating mechanism includes a coating box 16, a sprayer 17, a second air pipe 22, a second vacuum machine 23, and a fifth air pipe 24. The bottom of the coating box 16 is provided with the second air pipe 22, and one end of the second air pipe 22 is provided with the second vacuum machine 23. The inner side of the coating box 16 is placed with a visible double-lumen bronchial tube 2 that has been treated by the plasma cleaning mechanism. The inner bottom wall of the coating box 16 is rotatably connected to a bracket, and the upper part of the bracket is placed with the visible double-lumen bronchial tube 2. The top of the coating box 16 is provided with a sprayer 17, and the top of the sprayer 17 is provided with a fifth air pipe 24. The fifth air pipe 24 is provided with a pneumatic diaphragm valve 18, a vacuum gauge 6, a mass flow meter 7, and a manual shut-off valve 8. The top of the fifth air pipe 24 is connected to a container bottle 19, and the inner side of the container bottle 19 is coated with material.

[0030] Sprayer 17 sprays coating material onto the surface of the visual double-lumen endotracheal tube 2.

[0031] The inner side of cylinder 12 contains ammonia, the inner side of cylinder 9 contains oxygen, the inner side of cylinder 3 contains a mixture of hydrogen and nitrogen, and the inner side of cylinder 4 contains argon.

[0032] The release and shut-off of gas in cylinders 2 (9), 1 (12), 4 (20), and 3 (21) are controlled by a manual shut-off valve 8 and a pneumatic diaphragm three-way valve 4.

[0033] The gas is introduced into the inner cavity of the coating chamber 16 in sequence by manually shutting off valve 8, so that polar groups are attached to the surface of the visible dual-lumen endotracheal cannula 2. The steps are as follows:

[0034] ① Place the visual double-lumen endotracheal tube 2 into the inner cavity of the vacuum treatment box 1, then seal the vacuum treatment box 1 and close all manual shut-off valves 8 and pneumatic diaphragm three-way valves 4.

[0035] ② Start vacuum machine 15. Vacuum machine 15 extracts gas from the inner cavity of vacuum treatment box 1 through vent pipe 14, so that the inner cavity of vacuum treatment box 1 is evacuated and the gas pressure in the inner cavity of vacuum machine 15 is lower than 0.1Pa. Then continue to run vacuum machine 15.

[0036] ③ Open all pneumatic diaphragm three-way valves 4, and simultaneously open the manual shut-off valves 8 connected to air pipe 1 5 or air pipe 3 11 and air pipe 4 13, so that the gas in gas cylinder 1 12 or gas cylinder 3 21 and gas cylinder 4 20 can be introduced into the low-temperature plasma generator 3. Then open the manual shut-off valve 8 connected to air pipe 2 10 to introduce the gas in gas cylinder 2 9. The internal pressure of the vacuum treatment chamber 1 is maintained at 25-400 Pa. The operation of the low-temperature plasma generator 3 causes these gases to generate charged plasma. These plasmas enter the internal cavity of the vacuum treatment chamber 1 and come into contact with the surface of the visible double-lumen bronchial cannula 2, so that the surface of the visible double-lumen bronchial cannula 2 is thoroughly cleaned. During the contact process, a reaction occurs, so that polar groups are generated on the surface of the visible double-lumen bronchial cannula 2. The polar groups are hydroxyl functional groups or amino functional groups, which significantly increase the surface energy and wettability of the material surface.

[0037] The coating material is an acrylic-polystyrene-polydimethylsiloxane copolymer;

[0038] The bottom ends of the vacuum treatment chamber 1 and the coating chamber 16 are both equipped with magnetic fluid seals 25. The bottom end pivot of the bracket on the vacuum treatment chamber 1 and the bottom end pivot of the bracket on the coating chamber 16 pass through the inside of the magnetic fluid seals 25 on the vacuum treatment chamber 1 and the coating chamber 16, respectively.

[0039] The magnetohydrodynamic seal 25 ensures good sealing of the vacuum treatment chamber 1 and the coating chamber 16.

[0040] A filter 26 is provided in the middle of both the first vent pipe 14 and the second vent pipe 22;

[0041] The filter 26 can filter the gas entering the first vent pipe 14 and the second vent pipe 22.

[0042] The bracket and support can rotate horizontally, allowing the visual dual-lumen endotracheal tube 2 to make more uniform contact with the gas and coating material.

[0043] Acrylic-polystyrene-polydimethylsiloxane copolymer can be used as a coating to reduce sputum adhesion.

[0044] A coating material is sprayed onto the surface of the visual dual-lumen endotracheal cannula 2 after it has been treated by a plasma cleaning mechanism using a vacuum coating mechanism, so that a dense coating is formed on the surface of the visual dual-lumen endotracheal cannula 2. The steps are as follows:

[0045] ① Place the visual dual-lumen endotracheal tube 2, which has been treated by the plasma cleaning mechanism, into the inner cavity of the coating box 16, and close the manual shut-off valve 8 and the pneumatic diaphragm valve 18 on the endotracheal tube 24, and completely seal the inner cavity of the coating box 16.

[0046] ② Start vacuum machine 23. Vacuum machine 23 evacuates the inner cavity of coating box 16 through air pipe 22, so that the air pressure in the inner cavity of coating box 16 is 0.1 Pa.

[0047] ③ Open the pneumatic diaphragm valve 18 and manual shut-off valve 8 on the trachea 5 24 in sequence. Under the action of pressure difference, the coating material in the container bottle 19 is sprayed into the inner cavity of the coating box 16 through the trachea 5 24 and the sprayer 17. Due to the extremely low air pressure in the coating box 16, the coating material becomes vapor molecules that fill the inner cavity of the coating box 16. The vapor molecules of the coating material come into full contact with the surface of the visible double-lumen bronchial tube 2 after being treated by the plasma cleaning mechanism. Due to the significant increase in surface energy and wettability of the material surface of the visible double-lumen bronchial tube 2 after being treated by the plasma cleaning mechanism, the vapor molecules of the coating material effectively wet the material surface and better fill the micro-molecular structure through capillary action, and finally form a dense coating that is not easy to fall off on the surface of the visible double-lumen bronchial tube 2.

[0048] The model of the low-temperature plasma generator 3 is Litmas RPS 1501.

[0049] Example 1: The surface of the visual double-lumen endotracheal tube 2 that has not been treated by the cleaning mechanism is directly coated with a coating material by a vacuum coating mechanism, so that a coating is formed on the surface of the visual double-lumen endotracheal tube 2. Hereinafter, the "visual double-lumen endotracheal tube 2 that has not been treated by the cleaning mechanism" will be referred to as "untreated visual double-lumen endotracheal tube 2".

[0050] The coating material is an acrylic-polystyrene-polydimethylsiloxane copolymer;

[0051] The untreated visual double-lumen endotracheal cannula 2 is placed directly into the inner cavity of the coating box 16 and then the following steps are performed:

[0052] ① Place the untreated visual double-lumen endotracheal tube 2 into the inner cavity of the coating box 16, and close the manual shut-off valve 8 and pneumatic diaphragm valve 18 on the endotracheal tube 24, and completely seal the inner cavity of the coating box 16.

[0053] ② Start vacuum machine 23. Vacuum machine 23 evacuates the inner cavity of coating box 16 through air pipe 22, so that the air pressure in the inner cavity of coating box 16 is lower than 0.1 Pa.

[0054] ③ Open the pneumatic diaphragm valve 18 and manual shut-off valve 8 on the trachea 5 24 in sequence. Under the action of pressure difference, the coating material in the container bottle 19 is sprayed into the inner cavity of the coating box 16 through the trachea 5 24 and the sprayer 17. Due to the extremely low air pressure in the coating box 16, the coating material becomes vapor molecules that fill the inner cavity of the coating box 16. The vapor molecules of the coating material come into full contact with the surface of the untreated visual double-lumen bronchial tube 2, and finally a dense coating is formed on the surface of the visual double-lumen bronchial tube 2.

[0055] Example 2: First, the visual double-lumen endotracheal cannula 2 is treated by a plasma cleaning mechanism to clean the visual double-lumen endotracheal cannula 2 and to attach polar groups to the surface of the visual double-lumen endotracheal cannula 2.

[0056] Then, after being treated by the plasma cleaning mechanism, a coating material is sprayed onto the surface of the visual dual-lumen endotracheal tube 2 using a vacuum coating mechanism to form a dense coating on the surface of the visual dual-lumen endotracheal tube 2.

[0057] The coating material uses an acrylic-polystyrene-polydimethylsiloxane copolymer, and the steps are as follows:

[0058] (1) The surface of the visual double-lumen endotracheal cannula 2 was treated using a plasma cleaning system:

[0059] ① Place the visual double-lumen endotracheal tube 2 into the inner cavity of the vacuum treatment box 1, then seal the vacuum treatment box 1 and close all manual shut-off valves 8 and pneumatic diaphragm three-way valves 4.

[0060] ② Start vacuum machine 15. Vacuum machine 15 draws gas from the inner cavity of vacuum treatment box 1 through vent pipe 14, so that the inner cavity of vacuum treatment box 1 is evacuated and the gas pressure in the inner cavity of vacuum machine 15 reaches 0.1Pa. Then continue to run vacuum machine 15.

[0061] ③ Open all pneumatic diaphragm three-way valves 4, and simultaneously open the manual shut-off valves 8 connected to the third gas pipe 11 and the fourth gas pipe 13, so that the gas in the third gas cylinder 21 and the fourth gas cylinder 20 can be introduced into the low-temperature plasma generator 3. Then open the manual shut-off valve 8 connected to the second gas pipe 10, so that the gas in the second gas cylinder 9 can be introduced. The low-temperature plasma generator 3 operates to generate charged plasma from these gases. These plasmas enter the inner cavity of the vacuum treatment chamber 1 and come into contact with the surface of the visible double-lumen bronchial tube 2, so that the surface of the visible double-lumen bronchial tube 2 is thoroughly cleaned. During the contact process, a reaction occurs, so that polar groups are generated on the surface of the visible double-lumen bronchial tube 2. The polar groups are hydroxyl functional groups, which significantly increase the surface energy and wettability of the material surface. The contact angle of the coating is 80°.

[0062] (2) Apply a coating material to the surface of the visual dual-lumen endotracheal cannula 2 using a vacuum coating mechanism:

[0063] ① Place the visual dual-lumen endotracheal tube 2, which has been treated by the plasma cleaning mechanism, into the inner cavity of the coating box 16, and close the manual shut-off valve 8 and the pneumatic diaphragm valve 18 on the endotracheal tube 24, and completely seal the inner cavity of the coating box 16.

[0064] ② Start vacuum machine 23. Vacuum machine 23 evacuates the inner cavity of coating box 16 through air pipe 22, so that the air pressure in the inner cavity of coating box 16 is 0.1 Pa.

[0065] ③ Open the pneumatic diaphragm valve 18 and manual shut-off valve 8 on the trachea 24 in sequence. Under the action of pressure difference, the coating material in the container bottle 19 is sprayed into the inner cavity of the coating box 16 through the trachea 24 and the sprayer 17. Due to the extremely low air pressure in the coating box 16, the coating material becomes vapor molecules that fill the inner cavity of the coating box 16. The vapor molecules of the coating material are in full contact with the surface of the visible double-lumen bronchial tube 2 after being treated by the plasma cleaning mechanism. Due to the significant increase in surface energy and wettability of the material surface of the visible double-lumen bronchial tube 2 after being treated by the plasma cleaning mechanism, the vapor molecules of the coating material effectively wet the material surface and better fill the micro-molecular structure through capillary action. Finally, a dense coating that is not easy to fall off is formed on the surface of the visible double-lumen bronchial tube 2. The contact angle of the coating is 48°.

[0066] Comparing Examples 1 and 2, it was found that the contact angle of the coating of the untreated dual-lumen bronchial cannula 2 (80°) was significantly enhanced compared to the contact angle of the coating of the treated dual-lumen bronchial cannula 2 (48°). This significantly increased the hydrophilicity of the coating material, making it much easier to bond the coating material to the material of the dual-lumen bronchial cannula 2. This is something that traditional surface treatment processes cannot match. The hydrophilic groups—hydroxyl or amino functional groups—enhance the hydrophilicity. Typically, coating materials contain both hydrophilic and hydrophobic portions. By bonding the hydrophilic layer to the surface of the lens requiring anti-fog treatment, the hydrophilicity of the substrate surface is increased under the action of plasma, resulting in a significant increase in coating adhesion.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a coating applied to a visual dual-lumen endotracheal cannula, characterized in that, The preparation method is implemented using a device including a plasma cleaning mechanism and a vacuum coating mechanism. The plasma cleaning mechanism includes a vacuum treatment chamber (1), and a visible double-lumen endotracheal tube (2) is placed inside the vacuum treatment chamber (1). A ventilation pipe (14) is installed at the bottom of the vacuum treatment chamber (1), and a vacuum machine (15) is installed at one end of the ventilation pipe (14). A low-temperature plasma generator (3) is installed at the top of the vacuum treatment chamber (1), and a gas pipe (13) is installed at the top of the low-temperature plasma generator (3). Three pneumatic diaphragm three-way valves (4) are installed sequentially on the gas pipe (13). The three pneumatic diaphragm three-way valves (4) are respectively connected to gas pipe (5), gas pipe (10), and gas pipe (11). The top of the gas pipe (13) is away from the top of the pneumatic diaphragm three-way valves (4) and gas pipes (5), (10), and (11). The vacuum coating mechanism includes a coating box (16), a sprayer (17), a ventilation pipe (22), a vacuum machine (23), and a gas pipe (5). The top of the gas pipe (5), the gas pipe (22), the gas pipe (23), and the gas pipe (4) are respectively connected to the top of the gas cylinder (12), the gas cylinder (9), the gas cylinder (21), and the gas cylinder (20). The vacuum coating mechanism includes a coating box (16), a sprayer (17), a ventilation pipe (22), a vacuum machine (23), and a gas pipe (5). The bottom of the coating box (16) is provided with a ventilation pipe (22). One end of the ventilation pipe (22) is provided with a vacuum machine (23). The inner side of the coating box (16) is placed with a visible double-lumen bronchial tube (2) after being treated by the plasma cleaning mechanism. The inner bottom wall of the coating box (16) is rotatably connected to a bracket, and a visual double-lumen endotracheal tube (2) is placed on the upper part of the bracket. A sprayer (17) is set on the top of the coating box (16), and a gas pipe five (24) is set on the top of the sprayer (17). A pneumatic diaphragm valve (18), a vacuum gauge (6), a mass flow meter (7), and a manual shut-off valve (8) are set on the gas pipe five (24). The top of the gas pipe five (24) is connected to a container bottle (19), and the inner side of the container bottle (19) is coated with material. The inner side of the gas cylinder one (12) contains ammonia, the inner side of the gas cylinder two (9) contains oxygen, the inner side of the gas cylinder three (21) contains a mixture of hydrogen and nitrogen, and the inner side of the gas cylinder four (20) contains argon. The gas is controlled by the manual shut-off valve (8) to be introduced into the coating box in sequence. 16) The inner lumen is used to attach polar groups to the surface of the visual double-lumen endotracheal cannula (2), and the steps are as follows: ① Place the visual double-lumen endotracheal tube (2) into the inner cavity of the vacuum processing box (1), then seal the vacuum processing box (1), and close all manual shut-off valves (8) and pneumatic diaphragm three-way valves (4). ② Start vacuum machine one (15). Vacuum machine one (15) extracts gas from the inner cavity of vacuum processing box (1) through vent pipe one (14), so that the inner cavity of vacuum processing box (1) is evacuated and the gas pressure in the inner cavity of vacuum machine one (15) is lower than 0.1Pa. Then continue to run vacuum machine one (15). ③ Open all pneumatic diaphragm three-way valves (4), and simultaneously open the manual shut-off valves (8) connected to gas pipe one (5) or gas pipe three (11) and gas pipe four (13), so that the gas in gas cylinder one (12) or gas cylinder three (21) and gas cylinder four (20) is introduced into the low-temperature plasma generator. (3) Then open the manual shut-off valve (8) connected to the second gas pipe (10) to allow the gas in the second gas cylinder (9) to enter the vacuum treatment box. The internal pressure of (1) is maintained at 25~400Pa. The operation of the low-temperature plasma generator (3) causes these gases to generate charged plasma. These plasmas enter the internal cavity of the vacuum processing chamber (1) and come into contact with the surface of the visual dual-lumen bronchial cannula (2), causing the visual dual-lumen bronchial cannula to... (2) The surface is thoroughly cleaned and reacts during contact, generating polar groups on the surface of the visual double-lumen endotracheal cannula (2). These polar groups are hydroxyl or amino functional groups, which significantly increase the surface energy and wettability of the material. The coating material is an acrylic-polystyrene-polydimethylsiloxane copolymer. The coating material is sprayed onto the surface of the visual double-lumen endotracheal cannula (2) after plasma cleaning using a vacuum coating mechanism, forming a dense coating on the surface of the visual double-lumen endotracheal cannula (2). The steps are as follows: ① Place the visual double-lumen endotracheal tube (2) after plasma cleaning into the inner cavity of the coating box (16), and close the endotracheal tube. (24) The manual shut-off valve (8) and the pneumatic diaphragm valve (18) on the coating box (16) are completely sealed. ② Start vacuum machine two (23). Vacuum machine two (23) evacuates the inner cavity of the coating box (16) through the air vent two (22), so that the coating box (16) The internal air pressure is maintained below 0.1 Pa; ③ Open the pneumatic diaphragm valve (18) and manual shut-off valve (8) on the trachea (24) in sequence. Under the action of pressure difference, the coating material in the container (19) is sprayed into the inner cavity of the coating box (16) through the trachea (24) and the sprayer (17). Due to the extremely low air pressure in the coating box (16), the coating material becomes vapor molecules that fill the inner cavity of the coating box (16). The vapor molecules of the coating material are in full contact with the surface of the visual double-lumen bronchial tube (2) after being treated by the plasma cleaning mechanism. Due to the significant increase in surface energy and wettability of the material surface of the visual double-lumen bronchial tube (2) after being treated by the plasma cleaning mechanism, the vapor molecules of the coating material effectively wet the material surface and better fill the micro-molecular structure through capillary action. Finally, a dense coating that is not easy to fall off is formed on the surface of the visual double-lumen bronchial tube (2).

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