Bidirectional closed sputum suction tube

Abstract

The invention discloses a bidirectional closed sputum suction tube, which relates to the technical field of sputum suction tubes, and comprises a negative pressure connector, a pressure valve, a protective film, a sputum suction inner tube, a three-way valve, a breathing machine interface, an artificial airway interface, a cleaning tube and a medicine injection tube, one end of the negative pressure connector is connected with negative pressure equipment, and the negative pressure connector is connected with the pressure valve and the sputum suction inner tube; the end, close to the pressure valve, of the sputum suction inner tube is sleeved with a protective film, the other end of the sputum suction inner tube is connected with a three-way valve, the three-way valve is provided with a breathing machine connector and an artificial airway connector, the three-way valve is connected with a cleaning tube and a medicine injection tube, and the end, away from the negative pressure connector, of the sputum suction inner tube extends into the airway from the artificial airway connector. By arranging the inner tube cleaning assembly, the sputum suction inner tube can be cleaned, high sputum suction efficiency is kept, in addition, by arranging the flushing switch assembly, liquid medicine can be prevented from entering the flushing tube during injection, residues of the liquid medicine in the three-way valve can be reduced, and waste of the liquid medicine is reduced.

Description

Technical Field

[0001] This invention relates to the field of suction catheter technology, and more particularly to a bidirectional closed suction catheter. Background Technology

[0002] A bidirectional closed suction catheter is a medical device used to remove secretions from a patient's respiratory tract. Its main feature is that it can perform suctioning without interrupting mechanical ventilation, and it has bidirectional functions, which can both suction secretions and perform flushing or drug administration.

[0003] A search revealed that Chinese patent application number 2021218695833 discloses a user-friendly bidirectional closed suction catheter, comprising a negative pressure connector and a pressure valve. A suction inner tube is fixedly installed inside the negative pressure connector. A protective film is fitted over the outer surface of the suction inner tube. A three-way connector for an artificial airway is fixedly connected to the outer wall of the end of the suction inner tube away from the negative pressure connector. A cleaning port for flushing is fixedly installed on the outer surface of the three-way connector for the artificial airway. A medication inlet is fixedly installed at the end of the outer surface of the three-way connector for the artificial airway away from the cleaning port. A three-way connector for a breathing circuit is fixedly installed on the side of the outer surface of the three-way connector for the artificial airway opposite to the cleaning port.

[0004] The existing technology has the following shortcomings: the surface of the suction tube is easily absorbed by sputum, causing blockage and reducing the suction effect; when injecting medication through the injection port, the medication is easily left in the three-way valve and enters the irrigation port; therefore, the present invention proposes a bidirectional closed suction tube. Summary of the Invention

[0005] The purpose of this invention is to address the deficiencies in the existing technology by proposing a bidirectional closed suction tube.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A bidirectional closed suction catheter includes a negative pressure connector, a pressure valve, a protective membrane, a suction inner tube, a three-way valve, a ventilator interface, an artificial airway interface, a cleaning tube, and a medication infusion tube. One end of the negative pressure connector is connected to a negative pressure device, and the negative pressure connector is connected to the pressure valve and the suction inner tube. The end of the suction inner tube near the pressure valve is fitted with a protective membrane, and the other end of the suction inner tube is connected to the three-way valve. The three-way valve has a ventilator interface, an artificial airway interface, and is connected to a cleaning tube and a medication infusion tube. The end of the suction inner tube away from the negative pressure connector extends from the artificial airway interface into the airway. A flushing switch assembly is installed on the three-way valve at a position between the cleaning pipe and the injection pipe; An inner tube cleaning assembly is installed on the three-way valve at the end near the artificial airway interface.

[0007] Furthermore, the negative pressure connector, cleaning tube, and injection tube are all equipped with removable sealing protective covers.

[0008] Furthermore, the flushing switch assembly includes two symmetrically fixed closed tubes on the three-way valve. The two closed tubes are symmetrically fixed as one piece with the suction inner tube as the center, and a channel is provided at the connection of the two closed tubes. The suction inner tube passes through the channel and is sealed to the channel. Multiple flow holes are opened at the end of each of the two closed tubes near the suction inner tube. An insert rod is fixed on the inner side of each of the two closed tubes near the suction inner tube. A pressure rod is slidably sleeved on the end of the insert rod away from the suction inner tube. The end of the pressure rod away from the insert rod slides through to the outside of the closed tube and is equipped with a pressure plate. A first sealing plate and a second sealing plate are fixedly installed on the end of the pressure rod located on the inner side of the closed tube. A gap is left between the first sealing plate and the second sealing plate. The second sealing plate is located on the side of the pressure rod near the suction inner tube.

[0009] Furthermore, a rubber layer is fixed to the circumferential surface of both the first and second sealing plates.

[0010] Furthermore, a plurality of sealing balls are fixed on the circumferential surface of the second sealing plate, and the sealing balls correspond to the flow holes.

[0011] Furthermore, a sliding cavity is provided at one end of the pressure rod near the suction tube, and a spring is installed in the sliding cavity. One end of the insertion rod slides into the sliding cavity and abuts against one end of the spring.

[0012] Furthermore, the inner tube cleaning assembly includes a magnetic rotating ring rotatably sleeved on the outer circumferential surface of the three-way valve, and multiple connecting rings sleeved on the outer surface of the suction inner tube. Multiple flexible cleaning strips are fixed between the connecting rings. The inner surface of the flexible cleaning strips has multiple friction contact points with the outer surface of the suction inner tube. One end of the flexible cleaning strip extends to the inside of the three-way valve and is fixed with multiple transmission rods. A magnetic slider is fixed at the end of the transmission rod away from the flexible cleaning strip. The magnetic slider has a different magnetism from the magnetic rotating ring.

[0013] Furthermore, the inner circumferential surface of the three-way valve is fixed with two inner slip rings, and the magnetic slider is slidably disposed within the annular slide rail formed by the two inner slip rings. The outer circumferential surface of the three-way valve is fixed with two outer slip rings, and the magnetic rotating ring is slidably disposed within the annular slide rail formed by the two outer slip rings.

[0014] Furthermore, the outer circumferential surface of the magnetic rotating ring is fixedly fitted with an anti-slip rubber sleeve, and the outer circumferential surface of the anti-slip rubber sleeve is fixed with multiple anti-slip protrusions.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, a flushing switch assembly is provided at the three-way valve. The flushing switch assembly is located between the cleaning tube and the injection tube. Under normal conditions, the flushing switch assembly is in the closed state. When medication is needed, medication is injected into the three-way valve and airway through the injection tube for treatment. At this time, the medication will not enter the cleaning tube, which also reduces the residue of medication in the three-way valve. When it is necessary to flush the suction tube and airway, simply press the pressure plate of the flushing switch assembly to open the flushing switch assembly. At this time, the flushing tube can inject flushing fluid into the three-way valve and airway to flush the airway and suction tube.

[0016] 2. In this invention, an inner tube cleaning component is provided at the three-way valve for cleaning the front end of the suction tube, i.e., the end inserted into the airway. By rotating the magnetic rotating ring, the magnetic slider, transmission rod, and flexible cleaning strip in the three-way valve can be rotated relative to the suction tube. The friction action can clean the sputum on the surface of the suction tube, preventing the micropores on the surface of the suction tube from being blocked, thereby ensuring that the suction tube can smoothly extract sputum and ensuring suction efficiency.

[0017] In summary, the present invention can clean the suction tube by setting an inner tube cleaning component, so as to maintain its high suction efficiency. In addition, the flushing switch component can prevent the medicine from entering the flushing tube during injection, and can also reduce the residue of medicine in the three-way valve, thus reducing medicine waste. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A partial cross-sectional view of the three-way valve near the artificial airway interface; Figure 3 A schematic diagram showing the installation and assembly of the inner tube cleaning assembly and the suction inner tube; Figure 4 for Figure 3 Cross-sectional view of the inner tube cleaning assembly near the three-way valve; Figure 5 for Figure 3 Exploded view of the structure of the inner tube cleaning assembly, three-way valve and suction tube; Figure 6 This is a schematic diagram showing the installation of the flushing switch assembly relative to the suction tube; Figure 7 This is an internal cross-sectional view of the enclosed tube in the flushing switch assembly; Figure 8 for Figure 7 Enlarged view of part a of the structure; Figure 9 This is a schematic diagram showing the installation of the closed tube relative to the three-way valve and the suction tube.

[0020] In the diagram: Inner tube cleaning assembly, flushing switch assembly, 1 negative pressure connector, 2 pressure valve, 3 protective membrane, 4 suction inner tube, 5 three-way valve, 6 ventilator interface, 7 artificial airway interface, 8 cleaning tube, 9 medication infusion tube, 10 sealing tube, 11 magnetic rotating ring, 12 flexible cleaning strip, 13 connecting ring, 14 transmission rod, 15 magnetic slider, 16 inner slip ring, 17 outer slip ring, 18 pressure plate, 19 flow hole, 20 pressure rod, 21 first sealing plate, 22 second sealing plate, 23 insertion rod, 24 spring, 25 sealing ball. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; Reference Figure 1-9 A bidirectional closed suction catheter includes a negative pressure connector 1, a pressure valve 2, a protective membrane 3, a suction inner tube 4, a three-way valve 5, a ventilator interface 6, an artificial airway interface 7, a cleaning tube 8, and a medication injection tube 9. One end of the negative pressure connector 1 is connected to a negative pressure device. The negative pressure connector 1 is connected to the pressure valve 2 and the suction inner tube 4. The end of the suction inner tube 4 near the pressure valve 2 is fitted with a protective membrane 3. The other end of the suction inner tube 4 is connected to the three-way valve 5. The three-way valve 5 has a ventilator interface 6 and an artificial airway interface 7, and the three-way valve 5 is connected to the cleaning tube 8 and the medication injection tube 9. The end of the suction inner tube 4 away from the negative pressure connector 1 extends from the artificial airway interface 7 into the airway. A flushing switch assembly is installed on the three-way valve 5 at a position between the cleaning pipe 8 and the injection pipe 9; An inner tube cleaning assembly is installed on the three-way valve 5 at the end near the artificial airway interface 7.

[0022] Furthermore, removable sealing protective covers are installed on the negative pressure connector 1, cleaning pipe 8, and injection pipe 9. The sealing protective covers can seal the negative pressure connector 1, cleaning pipe 8, and injection pipe 9 to prevent them from being contaminated before they are idle or unused.

[0023] Furthermore, the flushing switch assembly includes two symmetrically fixed closed tubes 10 on the three-way valve 5. The two closed tubes 10 are symmetrically fixed as one piece with the suction inner tube 4 as the center, and a channel is provided at the connection of the two closed tubes 10. The suction inner tube 4 passes through the channel and is sealed to the channel. Multiple flow holes 19 are opened at the end of each of the two closed tubes 10 near the suction inner tube 4. Insert rods 23 are fixed on the inner side of each of the two closed tubes 10 and at the end near the suction inner tube 4. A pressure rod 20 is slidably sleeved on the end of the insert rod 23 away from the suction inner tube 4. The end of the pressure rod 20 away from the insert rod 23 slides through to the outside of the closed tube 10 and is equipped with a pressure plate 18. A first sealing plate 21 and a second sealing plate 22 are fixedly installed on the end of the pressure rod 20 located inside the closed tube 10. A gap is left between the first sealing plate 21 and the second sealing plate 22. The second sealing plate 22 is located on the side of the pressure rod 20 near the suction inner tube 4.

[0024] Furthermore, a rubber layer is fixed to the circumferential surface of both the first sealing plate 21 and the second sealing plate 22.

[0025] Furthermore, a plurality of sealing balls 25 are fixed on the circumferential surface of the second sealing plate 22, and the sealing balls 25 correspond to the flow holes 19.

[0026] Furthermore, a sliding cavity is provided at one end of the pressure rod 20 near the suction tube 4, and a spring 24 is installed in the sliding cavity. One end of the insertion rod 23 slides into the sliding cavity and abuts against one end of the spring 24.

[0027] When the flushing switch assembly is closed, the spring 24 is in its normal state. At this time, the second sealing plate 22 is directly opposite the flow hole 19, and the sealing ball 25 is inside the flow hole 19, so the flow hole 19 can be closed. When it is necessary to open, simply press the pressure plate 18 to control the pressure rod 20 to push the first sealing plate 21 and the second sealing rod 22 towards the side of the sealing tube 10 closer to the suction tube 4. At this time, both the sealing ball 25 and the second sealing plate 22 can be moved, thereby removing the seal on the flow hole 19. At this time, the flow hole 19 can communicate with the inside of the sealing tube 10, and the flushing switch assembly is in the open state. Then, flushing fluid can be injected into the three-way valve 5 through the flushing tube 8, thereby flushing the three-way valve 5, the suction tube 4, and the airway.

[0028] Furthermore, the inner tube cleaning assembly includes a magnetic rotating ring 11 rotatably sleeved on the outer circumferential surface of the three-way valve 5, and a plurality of connecting rings 13 sleeved on the outer surface of the suction inner tube 4. A plurality of flexible cleaning strips 12 are fixed between the connecting rings 13. The inner surface of the flexible cleaning strips 12 has a plurality of friction contact points with the outer surface of the suction inner tube 4. One end of the flexible cleaning strip 12 extends to the inner side of the three-way valve 5 and is fixed with a plurality of transmission rods 14. A magnetic slider 15 is fixed at the end of the transmission rod 14 away from the flexible cleaning strip 12. The magnetic slider 15 has a different magnetism from the magnetic rotating ring 11.

[0029] Furthermore, two inner slip rings 16 are fixed on the inner circumferential surface of the three-way valve 5, and the magnetic sliders 15 are slidably disposed in the annular slide rail formed by the two inner slip rings 16. Two outer slip rings 17 are fixed on the outer circumferential surface of the three-way valve 5, and the magnetic rotating ring 11 is slidably disposed in the annular slide rail formed by the two outer slip rings 17.

[0030] Furthermore, an anti-slip rubber sleeve is fixedly fitted on the outer circumferential surface of the magnetic rotating ring 11, and multiple anti-slip protrusions are fixed on the outer circumferential surface of the anti-slip rubber sleeve.

[0031] Rotating the magnetic rotating ring 11 allows the magnetic slider 15 to slide within the inner sliding ring 16, utilizing the magnetic attraction between it and the magnetic slider 15. This, in turn, controls the rotation of the transmission rod 14 and the flexible cleaning strip 12 relative to the suction tube 4. The friction between the flexible cleaning strip 12 and the suction tube 4 effectively cleans the suction tube 4, preventing blockage of the micropores and ensuring a stable and unobstructed suctioning effect.

Claims

1. A bidirectional closed suction catheter, comprising a negative pressure connector (1), a pressure valve (2), a protective membrane (3), a suction inner tube (4), a three-way valve (5), a ventilator interface (6), an artificial airway interface (7), a cleaning tube (8), and a medication infusion tube (9), characterized in that, One end of the negative pressure connector (1) is connected to a negative pressure device. The negative pressure connector (1) is connected to a pressure valve (2) and a suction tube (4). The suction tube (4) is fitted with a protective film (3) at one end near the pressure valve (2). The other end of the suction tube (4) is connected to a three-way valve (5). The three-way valve (5) has a ventilator interface (6) and an artificial airway interface (7). The three-way valve (5) is connected to a cleaning tube (8) and a drug injection tube (9). The end of the suction tube (4) away from the negative pressure connector (1) extends from the artificial airway interface (7) into the airway. A flushing switch assembly is installed on the three-way valve (5) at a position between the cleaning pipe (8) and the injection pipe (9); An inner tube cleaning assembly is installed on the three-way valve (5) at one end near the artificial airway interface (7).

2. The bidirectional closed suction catheter according to claim 1, characterized in that, The negative pressure connector (1), cleaning pipe (8), and injection pipe (9) are all equipped with removable sealing protective covers.

3. The bidirectional closed suction catheter according to claim 1, characterized in that, The flushing switch assembly includes two symmetrically fixed closed tubes (10) on a three-way valve (5). The two closed tubes (10) are symmetrically fixed as one unit with the suction tube (4) as the center, and a channel is provided at the connection of the two closed tubes (10). The suction tube (4) passes through the channel and is sealed to the channel. Multiple flow holes (19) are opened at the end of each of the two closed tubes (10) near the suction tube (4). An insertion rod (23) is fixed on the inner side of each of the two closed tubes (10) near the end of the suction tube (4). (23) A pressure rod (20) is slidably sleeved at one end away from the suction tube (4). The end of the pressure rod (20) away from the insertion rod (23) slides through to the outside of the closed tube (10) and is fitted with a pressure plate (18). The end of the pressure rod (20) located inside the closed tube (10) is fixedly fitted with a first sealing plate (21) and a second sealing plate (22). There is a gap between the first sealing plate (21) and the second sealing plate (22). The second sealing plate (22) is located on the side of the pressure rod (20) close to the suction tube (4).

4. The bidirectional closed suction catheter according to claim 3, characterized in that, Both the first sealing plate (21) and the second sealing plate (22) have rubber layers fixed on their circumferential surfaces.

5. A bidirectional closed suction catheter according to claim 3 or 4, characterized in that, The second sealing plate (22) has a plurality of sealing balls (25) fixed on its circumferential surface, and the sealing balls (25) correspond to the flow holes (19).

6. A bidirectional closed suction catheter according to claim 3, characterized in that, The pressure rod (20) has a sliding cavity at one end near the suction tube (4), and a spring (24) is installed in the sliding cavity. One end of the insertion rod (23) slides into the sliding cavity and abuts against one end of the spring (24).

7. A bidirectional closed suction catheter according to claim 1, characterized in that, The inner tube cleaning assembly includes a magnetic rotating ring (11) rotatably sleeved on the outer circumferential surface of the three-way valve (5), and multiple connecting rings (13) sleeved on the outer surface of the suction inner tube (4). Multiple flexible cleaning strips (12) are fixed between the connecting rings (13). The inner surface of the flexible cleaning strip (12) and the outer surface of the suction inner tube (4) have multiple friction contact points. One end of the flexible cleaning strip (12) extends to the inner side of the three-way valve (5) and is fixed with multiple transmission rods (14). A magnetic slider (15) is fixed at the end of the transmission rod (14) away from the flexible cleaning strip (12). The magnetic slider (15) has a different magnetism from the magnetic rotating ring (11).

8. A bidirectional closed suction catheter according to claim 7, characterized in that, The inner circumferential surface of the three-way valve (5) is fixed with two inner slip rings (16), and the magnetic slider (15) is slidably disposed in the annular slide rail formed by the two inner slip rings (16). The outer circumferential surface of the three-way valve (5) is fixed with two outer slip rings (17), and the magnetic rotating ring (11) is slidably disposed in the annular slide rail formed by the two outer slip rings (17).

9. A bidirectional closed suction catheter according to claim 7 or 8, characterized in that, The outer circumferential surface of the magnetic rotating ring (11) is fixedly fitted with an anti-slip rubber sleeve, and the outer circumferential surface of the anti-slip rubber sleeve is fixed with multiple anti-slip protrusions.

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