Anesthesia catheter system resistant to filter clogging

Abstract

The utility model relates to an anesthetic catheter system capable of preventing filter blockage belongs to the technical field of medical auxiliary instrument, including electromagnetic three -way valve, filter assembly and the interlock component for controlling the open -close state of electromagnetic three -way valve, electromagnetic three -way valve connects the entrance of two filter assemblies respectively, and the outlet of two filter assemblies is communicated with interlock component respectively, and the output end of interlock component is connected with breathing tube, when one group filter assembly appears the blockage, interlock component controls electromagnetic three -way valve to close the valve that one group filter assembly is communicated, the utility model discloses a solution that can automatically detect filter assembly blockage and can replace filter assembly without disturbing the anesthesia process.

Description

Technical Field

[0001] This utility model relates to an anesthesia catheter system that prevents filter blockage, belonging to the field of medical auxiliary device technology. Background Technology

[0002] Anesthesia catheters with a filtration structure are specially designed medical consumables. Their core purpose is to block particles, bubbles, or other foreign objects in liquids or gases through physical barriers, preventing precipitates, fibers, or microorganisms in the medication from entering the patient's body, thereby improving the safety of the anesthesia process.

[0003] Existing anesthetic catheters with filtering structures typically have a filter device connected to one end, which is then connected to the anesthesia machine via the tube body and other equipment. In the prior art, Chinese utility model patent announcement number CN218305746 U discloses a filterable breathing circuit designed to prevent detachment, including an anesthesia machine, a breathing circuit, an endotracheal tube, a breathing threaded tube, and a retractable filter. The breathing circuit is located on one side of the anesthesia machine and has a connection port. One end of the breathing threaded tube connects to the connection port, and the other end connects to one end of the filter. The other end of the filter connects to the endotracheal tube. A fixing device is provided at the connection port to secure the breathing threaded tube, solving the problem of easy detachment at the connection point between the breathing threaded tube and the breathing circuit on the anesthesia machine. However, if the surgery lasts a long time, the filter device may become clogged due to excessive adsorption of impurities, hindering gas flow and making it difficult to accurately control the amount of anesthetic gas entering the patient's body. This affects the anesthetic effect to some extent, thus impacting the safety and success rate of the surgery. Furthermore, while the existing technology can filter, it cannot automatically switch or temporarily bypass clogged filter components, further affecting the anesthetic effect. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model proposes an anesthesia catheter system to prevent filter clogging. The aim is to provide a solution that can automatically detect filter clogging and replace the filter without interfering with the anesthesia process. Specifically, this is achieved through the coordinated operation of an electromagnetic three-way valve, the filter assembly, and a control assembly, enabling automatic switching of the filter assembly.

[0005] The present invention employs a clogging-preventing anesthesia catheter system, comprising an electromagnetic three-way valve, a filter assembly, and a control assembly for controlling the opening and closing of the electromagnetic three-way valve. The electromagnetic three-way valve is connected to the inlet of two filter assemblies, and the outlets of the two filter assemblies are connected to the control assembly. The output end of the control assembly is connected to the breathing tube. When one of the filter assemblies becomes clogged, the control assembly controls the electromagnetic three-way valve to close the valve connected to the clogged filter assembly.

[0006] Furthermore, the control assembly includes a cylinder, branch pipes, a rod, a block, and two sets of microswitches located inside the cylinder. The branch pipes are installed at both ends of the cylinder, and the other end of the branch pipes is connected to the filter assembly. The rod is arranged along the axial direction of the cylinder, and the block is sleeved on the outer wall of the rod and slidably connected to the rod. The two sets of microswitches are respectively arranged between the block and the branch pipe. The two sets of microswitches are connected to the electromagnetic three-way valve through connecting wires. When there is a pressure difference in the gas flowing through the branch pipes at both ends of the cylinder, the gas pushes the block to move along the rod.

[0007] Furthermore, the cylinder is provided with an observation window for observing the position of the block.

[0008] Furthermore, the filter assembly includes a housing and filter screens 1, 2, and 3 located inside the housing, with filter screens 1, 2, and 3 arranged sequentially at intervals.

[0009] Furthermore, the filter holes of filter screen one, filter screen two, and filter screen three gradually decrease in size.

[0010] Furthermore, the first filter screen is made of polypropylene nonwoven fabric, the second filter screen is made of polypropylene electret, and the third filter screen is made of hydrophobic PTFE membrane.

[0011] Furthermore, the electromagnetic three-way valve is connected to two sets of filter components through branch A and branch B, respectively.

[0012] Furthermore, both ends of branch A and branch B are rigid pipes, while the middle part is a flexible pipe.

[0013] Furthermore, the bottom end of the housing is equipped with a connecting pipe, which is detachably connected to the branch pipe.

[0014] This utility model discloses an anesthesia catheter system to prevent filter blockage. Its beneficial effect is that, compared with the prior art, this utility model uses an electromagnetic three-way valve, a filter component, and a control component to work together. The electromagnetic three-way valve design realizes automatic switching of the gas flow path; the control component monitors the operation of the filter component to prevent the filter component on one side from being blocked and affecting the overall anesthesia effect, which significantly reduces the risk of filter component blockage, ensures smooth gas flow during the anesthesia process, and improves the effect and safety of anesthesia treatment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle filter component;

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the middle cylinder;

[0019] Figure 4 for Figure 3 A partial structural diagram of the central rod, block, and micro switch.

[0020] The diagram shows: 1. Solenoid three-way valve; 2. Breathing tube; 3. Branch A; 4. Branch B; 5. Connecting pipe; 6. Sealing ring one; 7. Sealing ring two; 11. Cylinder; 12. Branch pipe A; 13. Rod; 14. Block; 15. Microswitch A; 16. Connecting wire; 17. Branch pipe B; 18. Microswitch B; 20. Housing; 21. Filter screen one; 22. Filter screen two; 23. Filter screen three. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] To further understand the content of this utility model, the technical solution will be further described below in conjunction with specific embodiments.

[0023] Example 1: As Figures 1-4 As shown, this embodiment provides an anesthesia catheter system to prevent filter blockage, including a solenoid three-way valve 1, a filter assembly, and a control assembly for controlling the opening and closing state of the solenoid three-way valve 1. The two valves of the solenoid three-way valve 1 are respectively connected to the inlets of two sets of filter assemblies through branch A3 and branch B4. The outlets of the two sets of filter assemblies are connected to the control assembly. The output end of the control assembly is connected to the breathing tube 2. When one set of filter assemblies is blocked, the control assembly controls the solenoid three-way valve 1 to close the valve connected to the blocked filter assembly.

[0024] In a specific implementation of this embodiment, the control assembly includes a cylinder 11, branch pipes, and a rod 13, a block 14, and two sets of microswitches located inside the cylinder 11. The branch pipes are divided into branch pipe A12 and branch pipe B17, and the two sets of microswitches are microswitch A15 and microswitch B18, respectively. Branch pipes A12 and B17 are threaded to the two ends of the cylinder 11, and the other ends of branch pipes A12 and B17 are respectively connected to two sets of filter assemblies. The rod 13 runs along the cylinder... The cylinder 11 is axially positioned such that block 14 is fitted onto the outer wall of rod 13 and slidably connected to rod 13, which serves as a guide. Microswitch A15 is positioned between block 14 and branch pipe A12, and microswitch B18 is positioned between block 14 and branch pipe B17. Microswitch A15 and microswitch B18 are connected to electromagnetic three-way valve 1 via connecting wire 16. When there is a pressure difference between the gas flowing through branch pipe A12 and branch pipe B17, the gas pushes block 14 to move along rod 13. An observation window for observing the position of block 14 is provided on the cylinder 11. This observation window is not shown in the figure, but it should be noted that those skilled in the art can undoubtedly determine how it is set. When block 14 contacts microswitch A15 or microswitch B18, medical personnel perform filter component replacement operations.

[0025] Example 2: Figures 1-4 As shown, based on Embodiment 1, as a specific implementation of this embodiment, the filter assembly includes a housing 20 and filter screens 21, 22, and 23 located inside the housing 20. Filter screens 21, 22, and 23 are arranged sequentially at intervals. The inlet and outlet of the filter assembly refer to the top of the housing 20 having an inlet and the bottom having an outlet, respectively. Filter screens 21, 22, and 23 are parallel to each other and perpendicular to the straight line where the inlet and outlet of the filter assembly are located.

[0026] Furthermore, the filter pores of filter screen 21, filter screen 22, and filter screen 23 gradually decrease in size. Filter screen 21 is made of polypropylene nonwoven fabric to intercept large particulate impurities. Filter screen 22 can be made of polypropylene electret, which is an electrostatic electret air filter material that captures fine impurities through electrostatic effect. Filter screen 23 can be made of hydrophobic PTFE membrane to intercept droplets. To a certain extent, the step-by-step filtration of filter screen 21, filter screen 22, and filter screen 23 reduces the load on a single layer and extends the service life of the filter assembly.

[0027] Both ends of branch lines A3 and B4 are rigid pipes, while the middle sections are flexible pipes. The flexible pipe design, to some extent, avoids the problem of collision at the connection between branch lines A3 and B4 and the solenoid three-way valve 1 when disassembling the filter assembly.

[0028] The bottom of the housing 20 has two connecting pipes 5, which are threadedly connected to the housing 20 and the connecting pipes 5. The two connecting pipes 5 are respectively threadedly connected to the branch pipe A12 and the branch pipe B17.

[0029] The breathing tube 2 is connected to external tubing and other equipment to deliver anesthetic gas into the patient's trachea for anesthesia. In this embodiment, the two sets of microswitches can be of model SW-1A01A00B130. The SW-1A01A00B130 microswitches are waterproof. The two sets of microswitches are connected to the control circuit of the electromagnetic three-way valve 1 via connecting wire 16 to control the on / off state of the electromagnetic three-way valve 1. Connecting wire 16 passes through the cylinder 11. By separating the connecting pipe 5 from the branch pipe, the filter assembly can be disassembled and replaced. Branches A3 and B4 are connected to the flange of the electromagnetic three-way valve 1. The third valve of the electromagnetic three-way valve 1 is connected to the air inlet. The filter assembly filters the gas delivered by branches A3 and B4 to prevent impurities from entering the patient's trachea. Under normal use, the gas propels the block 14 to run smoothly. When a filter component becomes blocked, the gas flow on that side decreases, forcing the block 14 to move toward the blocked side until it contacts the microswitch on that side. This activates the control circuit to close the solenoid three-way valve 1, allowing the gas to bypass the blocked part and flow to the unobstructed filter component on the other side. This avoids the problem of the anesthetic effect being affected by the blockage of the filter component to a certain extent.

[0030] In addition, sealing rings 7 are adhered at the contact points between the connecting wire 16 and the cylinder 11 to prevent gas from escaping from the contact point and improve the device's sealing performance. Meanwhile, sealing rings 6 are adhered at the connections between the connecting pipe 5 and the branch pipe to prevent impurities from entering from the connection point and improve the device's sealing performance.

[0031] Taking Example 2 as an example, it is assumed that the filter components on the side where branch A3 and branch pipe A12 are located will become clogged during use. In use, the electromagnetic three-way valve 1 is connected to equipment such as an anesthesia machine. The anesthetic gas flows through the electromagnetic three-way valve 1, through branch A3 and branch B4, and is delivered to the two sets of filter components. It is filtered layer by layer by filter screens 21, 22, and 23. This layered filtration design avoids overloading any single layer to a certain extent, extending the service life of the filter components. The filtered gas is then delivered to the cylinder 11 through the connecting pipe 5 and branch pipe. During the filtration process, a large amount of impurities accumulate in the filter components, leading to physical blockage and thus causing poor gas flow. When the filter assembly on the side where branch A3 and branch A12 are located becomes blocked, the amount of gas delivered to the cylinder 11 through connecting pipe 5 and branch A12 decreases. On the other side, the gas delivered to the cylinder 11 through connecting pipe 5 and branch B17 pushes the block 14 to move. When the block 14 contacts the micro switch A15 on the side where branch A12 is located, it controls the solenoid three-way valve 1 to close the valve connected to branch A3, and gas is no longer delivered through the blocked filter assembly. At this time, the blocked filter assembly is removed and replaced. During this period, gas is delivered to the cylinder 11 through connecting pipe 5 and branch B17, and then to the breathing tube 2 through the cylinder 11, and finally delivered to the patient's trachea.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An anesthesia catheter system designed to prevent filter clogging, characterized in that, It includes a solenoid three-way valve (1), a filter assembly, and a control assembly for controlling the opening and closing state of the solenoid three-way valve (1). The solenoid three-way valve (1) is connected to the inlet of two filter assemblies respectively, and the outlet of the two filter assemblies is connected to the control assembly respectively. The output end of the control assembly is connected to the breathing tube (2). When one of the filter assemblies is blocked, the control assembly controls the solenoid three-way valve (1) to close the valve connected to the blocked filter assembly.

2. The anesthesia catheter system for preventing filter clogging according to claim 1, characterized in that, The control assembly includes a cylinder (11), branch pipes, and rods (13), blocks (14), and two sets of microswitches located inside the cylinder (11). The branch pipes are installed at both ends of the cylinder (11), and the other end of the branch pipes is connected to the filter assembly. The rods (13) are arranged along the axial direction of the cylinder (11). The blocks (14) are fitted on the outer wall of the rods (13) and are slidably connected to the rods (13). The two sets of microswitches are respectively set between the blocks (14) and the branch pipes. The two sets of microswitches are connected to the solenoid three-way valve (1) through connecting wires (16). When there is a pressure difference in the gas flowing through the branch pipes at both ends of the cylinder (11), the gas pushes the blocks (14) to move along the rods (13).

3. The anesthesia catheter system for preventing filter clogging according to claim 2, characterized in that, The cylinder (11) is provided with an observation window for observing the position of the block (14).

4. An anesthesia catheter system for preventing filter blockage according to any one of claims 1 to 3, characterized in that, The filter assembly includes a housing (20) and filter screens 1 (21), 2 (22) and 3 (23) located inside the housing (20), with filter screens 1 (21), 2 (22) and 3 (23) arranged sequentially at intervals.

5. The anesthesia catheter system for preventing filter clogging according to claim 4, characterized in that, The pore sizes of filter screen 1 (21), filter screen 2 (22), and filter screen 3 (23) gradually decrease in size.

6. The anesthesia catheter system for preventing filter clogging according to claim 4, characterized in that, Filter screen one (21) is made of polypropylene nonwoven fabric, filter screen two (22) is made of selected polypropylene electret, and filter screen three (23) is made of hydrophobic PTFE membrane.

7. The anesthesia catheter system for preventing filter clogging according to claim 1, characterized in that, The electromagnetic three-way valve (1) is connected to two sets of filter components through branch A (3) and branch B (4) respectively.

8. The anesthesia catheter system for preventing filter clogging according to claim 7, characterized in that, Both ends of branch A(3) and branch B(4) are rigid pipes, while the middle part is a flexible pipe.

9. An anesthesia catheter system for preventing filter clogging according to claim 4, characterized in that, The bottom of the housing (20) is equipped with a connecting pipe (5), which is detachably connected to the branch pipe.

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