An automatic closed suction device and suction method thereof

Abstract

This invention discloses an automatic closed suction device and its suction method. The device includes a main body, a suction tube, and a drive mechanism. The main body houses a waste liquid collection container connected to a negative pressure unit. The suction tube has an inner tube and a sheath. A negative pressure valve is connected to the rear end of the suction tube, and the negative pressure valve is connected to the waste liquid collection container via a negative pressure pipe. A multi-channel connector is connected to the front end of the suction tube, allowing the inner tube to pass through. The drive mechanism drives the inner tube to move and the sheath to stack, allowing the inner tube to be inserted into the patient's trachea to form a suction channel. The negative pressure unit and the negative pressure valve are activated, and waste liquid flows through the suction tube, the negative pressure pipe, and into the waste liquid collection container for unified collection and treatment. The multi-channel connector is connected to a humidification and flushing mechanism. This invention enables automatic tube insertion, suction, and tube withdrawal. The inner tube is humidified while being inserted into the trachea to protect the patient's trachea. After suctioning, the suction tube can be automatically flushed, greatly reducing the workload of medical staff and minimizing patient discomfort.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to an automatic closed suction device and a suction method thereof. Background Technology

[0002] When a patient's ability to swallow or expectorate is impaired or unable to clear respiratory secretions, a suction catheter is used to suction the patient's airway.

[0003] Currently, suction catheters on the market come in two types: conventional suction catheters and closed suction catheters. Closed suction catheters are favored because they maintain a sealed environment throughout use, reducing the possibility of patients being infected by airborne pathogens. Furthermore, a single closed suction catheter can be used repeatedly over a long period, lowering the cost of medical care for patients. Closed suction catheters represent the future direction and trend in respiratory health maintenance.

[0004] Normally, patients need 10 to 20 suctioning sessions per day to keep their airways clear. Suctioning is performed by doctors or nurses. However, due to the need to allocate some nursing staff to various streets for nucleic acid sampling, and the fact that critically ill COVID-19 patients have lung infections requiring daily rounds and suctioning by medical staff, the combined pressure from both sides has led to a significant shortage of medical personnel.

[0005] When using a closed suction catheter for sputum suction, it is all done manually, including manually inserting the catheter and manually pressing the negative pressure valve. Throughout the entire suctioning process, medical staff need to hold the closed suction catheter and cannot leave it. Suctioning is performed multiple times a day, which puts a lot of pressure on them.

[0006] In addition, because suctioning is performed multiple times a day, the suction catheter is not easily inserted into the patient's trachea, and the tracheal wall is relatively dry after a period of breathing. These factors can easily cause tracheal abrasions. After each suctioning, the inner wall of the suction catheter needs to be cleaned manually, otherwise bacteria can easily grow, making the work very tedious. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides an automatic closed suction device and its suction method, which can automatically insert the suction tube, automatically press to suction sputum, and automatically withdraw the tube. The inner tube of the suction tube is moistened while being inserted into the trachea to protect the patient's trachea. After suctioning, the suction tube can be automatically flushed, and the sputum and flushing waste can be collected and treated in a waste collection container, greatly reducing the workload of medical staff and minimizing patient suffering.

[0008] According to one aspect of the present invention, an automatic closed suction device is provided, comprising:

[0009] The machine body has a vertical rod connected to a horizontal support. Inside the machine body is a waste liquid collection container with a suction port and an inlet. The suction port is connected to a negative pressure machine.

[0010] The suction catheter has an inner tube and a sheath. The rear part of the suction catheter is placed in a transverse support. The rear end of the suction catheter is connected to a negative pressure valve, which is connected to the inlet of a waste collection container through a negative pressure tube. The front end of the suction catheter is connected to a multi-channel connector, which includes a proximal port, a distal port, and an oxygen inlet port. The oxygen inlet port is used to connect to a ventilator, and the distal port is used to connect to an artificial airway. The distal port is axially aligned with the proximal port and allows the inner tube to pass through.

[0011] The drive mechanism moves the inner tube and stacks the membrane. The inner tube is sent into the patient's trachea through the distal port and artificial airway to form a suction channel. The negative pressure machine and negative pressure valve are opened, and the waste liquid enters the waste liquid collection container through the suction tube and negative pressure tube for unified collection and treatment.

[0012] Therefore, during suctioning, the drive mechanism advances the inner tube of the suction catheter, and the outer sheath of the inner tube automatically stacks together. The inner tube is sequentially delivered into the patient's trachea from the proximal port, distal port, and artificial airway, forming a suction channel. The negative pressure machine and negative pressure valve are turned on, and sputum enters the inner tube. Due to the negative pressure suction, the sputum passes through the inner tube and negative pressure tube in sequence, and enters the waste liquid collection container from the inlet. This automatic closed suctioning device can automatically deliver the inner tube of the suction catheter into the patient's trachea and can automatically suction sputum mechanically, reducing the workload of medical staff.

[0013] In some embodiments, the drive mechanism includes a rear drive mechanism, which comprises a moving block, a long rack, and a gear. The transverse support has a guide rail for the moving block to pass through. The long rack is fixed within the transverse support. The gear is rotatably mounted within the moving block and meshes with the long rack. The gear is connected to a drive element. The gear rotates and meshes with the long rack to drive the moving block to move, thereby controlling the forward or backward movement of the inner tube and the stacking or expansion of the sheath. Thus, the drive element drives the gear to rotate, and the gear meshes with the long rack. The gear and the moving block move along the guide rail of the transverse support. When suctioning is required, the moving block moves forward, pushing the suction tube forward and inserting the inner tube into the patient's trachea. The sheath stacks as the inner tube moves forward. After suctioning is completed, the moving block retracts through the meshing of the gear and the long rack, and the suction tube returns to its original position.

[0014] In some embodiments, the movable block includes a movable pressing block that abuts against the switch of the negative pressure valve. A rack is located on the side of the pressing block, and a gear is meshed with the rack. The gear is connected to a driving component, which rotates and meshes with the rack to drive the pressing block to move and control the opening and closing of the negative pressure valve. Thus, by meshing the gear and rack, the left and right movement of the pressing block is controlled, simulating manual pressing of the negative pressure valve.

[0015] In some embodiments, the driving mechanism includes a front driving mechanism, which includes a front end frame and rotatable rollers symmetrically arranged relative to the suction tube. The front end frame is connected to a transverse support. The rollers are connected to a driving component four. A displacement block is provided below the rollers. A rack three is provided on the side of the displacement block. The rack three is meshed with a gear three. The gear three is connected to the driving component three. The gear three rotates and meshes with the rack three to drive the displacement block to drive the symmetrical rollers to clamp inward or separate outward. When the rollers clamp inward and rotate, they can drive the inner tube forward and the sleeves to stack. Therefore, when suctioning is required, the gear three meshes with the rack three to control the displacement blocks on both sides of the suction tube to move inward. The rollers on both sides clamp the suction tube, and the drive unit four drives the rollers to rotate. The rotating rollers allow the sheath and inner tube to move forward. The inner tube enters the patient's trachea through the multi-channel connector, and the sheath is stacked in the front frame. When the rollers rotate, the rear drive device can synchronously drive the suction tube to move from the rear end of the suction tube. During suctioning, the rollers separate to both sides to ensure smooth suctioning. After suctioning is completed, the rear drive device meshes with the gear one and the long rack, the displacement blocks retract, the inner tube retracts, the sheath expands, and the suction tube is reset.

[0016] In some implementations, the front-end frame and the transverse support are connected via a universal joint. This allows the front-end frame to rotate or be slightly adjusted up and down relative to the transverse support to adjust its height relative to the patient's artificial airway or ventilator, facilitating operation by healthcare personnel.

[0017] In some embodiments, the automatic closed suction device further includes a moist rinsing mechanism, which includes a reservoir and a rinsing tube. The multi-channel connector also includes a rinsing connector. The two ends of the rinsing tube are respectively connected to the reservoir and the rinsing connector, and a rinsing pump is provided on the rinsing tube.

[0018] As the inner tube moves forward, the liquid in the storage bottle is transported to the outer wall of the inner tube through the flushing tube to wet the inner tube;

[0019] After suctioning, the liquid in the storage bottle is transported through the flushing tube to the distal end of the inner tube to clean the inner tube and the negative pressure tube. The waste liquid is collected and treated in a waste liquid collection container.

[0020] Therefore, when inserting the inner tube, slowly adding liquid can moisten the surface of the inner tube, making it easier for the inner tube to slide into the patient's trachea and reducing the risk of tracheal abrasion. In addition, after a period of breathing, the inner wall of the patient's trachea is relatively dry, which can help moisten the inner wall of the patient's trachea and protect the trachea. After suctioning is completed and the suction tube is repositioned, the negative pressure machine and negative pressure valve are turned on, and liquid is injected to clean the negative pressure tube and the inside of the suction tube, preventing the tube from becoming blocked and breeding bacteria. Cleaning can be performed after each suctioning, which helps to reduce the chance of infection for the patient.

[0021] In some implementations, the multi-channel connector also includes a dosing tube. This allows for convenient administration of medication via the dosing tube when needed.

[0022] In some embodiments, the end of the negative pressure tube near the negative pressure valve is coiled, and the coiled negative pressure tube is housed within a transverse support. As the inner tube advances, the coiled negative pressure tube is elongated. Thus, the connection end between the negative pressure tube and the negative pressure valve is a coiled structure formed by heating and coiling. During installation, the negative pressure tube within the transverse support is installed in a coiled state. This coiled negative pressure tube structure allows for the necessary slack for the suction catheter to move. When the inner tube is inserted into the patient's airway, the coiled negative pressure tube is elongated, and after the suction catheter is reset, the negative pressure tube also resets.

[0023] In some implementations, the horizontal support and the vertical rod are connected by a universal joint. This allows for fixing and moving at any angle, facilitating connection of the automatic sealed suction device to the patient end and enabling medical staff to perform cleaning, back percussion, and other nursing care on the patient.

[0024] According to one aspect of the present invention, a method for suctioning sputum using the above-described automatic closed suctioning device is provided, characterized by comprising the following steps:

[0025] S1: Tube insertion: Drive the inner tube of the suction catheter forward and stack the sheath. The inner tube is inserted into the patient's trachea through the distal port and artificial airway to form a suction channel. When inserting the tube, turn on the flushing pump. The liquid in the reservoir is delivered to the outer wall of the inner tube through the flushing tube. The liquid wets the surface of the inner tube, making it easier for the inner tube to slide into the patient's trachea. It can also wet the inner wall of the patient's trachea.

[0026] S2: Suctioning: After the inner tube is inserted into the patient's trachea, the negative pressure machine and negative pressure valve are turned on. The sputum flows through the suction tube, the negative pressure tube, and into the waste liquid collection container for unified collection and treatment.

[0027] S3: Tube Retraction: After suctioning is completed, drive the inner tube of the suction catheter to retract, the sheath to expand, and the suction catheter to be reset.

[0028] S4: Flushing: Turn on the negative pressure machine and negative pressure valve. At the same time, turn on the flushing pump. The liquid in the storage bottle is transported through the flushing tube to the far end of the inner tube. The liquid enters the waste liquid collection container through the inner tube and negative pressure tube for unified collection and treatment, thus completing the flushing of the suction tube and negative pressure tube.

[0029] Therefore, when inserting the tube, wetting the inner surface of the tube makes it easier for the suction tube to slide into the patient's trachea, reducing the risk of tracheal abrasion. At the same time, wetting the inner wall of the patient's trachea, and cleaning the negative pressure tube and the inside of the suction tube after suctioning are completed, prevents the tube from becoming blocked and breeding bacteria.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: The automatic closed suction device provided by the present invention has a reasonable structure, and its suction method can reduce patient pain. Through the front drive mechanism and the rear drive mechanism, the front and rear parts of the suction tube are pushed simultaneously. Using the rotatable rollers on both sides of the suction tube, the rollers are rotated after clamping the suction tube, and at the same time, the moving block pushes the suction tube forward to drive the inner tube forward and the sheath stack, realizing the automatic delivery of the suction tube. At the same time as the tube is delivered, the liquid in the reservoir bottle is delivered to moisten the outer wall of the inner tube, making it easier for the inner tube to slide into the patient's trachea and reducing the risk of tracheal abrasion. After the tube is delivered in place, the rollers separate to both sides and release the inner tube. The negative pressure can be automatically applied by the left and right moving pressing block. The device automatically activates the negative pressure machine and valve to perform suctioning, collecting sputum in a waste collection container for centralized treatment. After suctioning, a moving block retracts the suction tube, which then automatically retracts and resets. By activating the negative pressure machine and valve, the liquid in the storage bottle is used to automatically flush the suction tube and negative pressure tubing. Sputum and flushing waste are collected and treated in the waste collection container. This automatic closed suctioning device reduces the need for medical staff to make rounds, significantly decreasing their workload. When connected to the patient, the device's position is easily adjustable, facilitating cleaning, back percussion, and other nursing care, thus reducing patient discomfort. Attached Figure Description

[0031] Figure 1 This is a perspective view of one embodiment of an automatic closed suction device of the present invention;

[0032] Figure 2 This is a structural diagram of the automatic closed suction device with removal of the moving block and front frame;

[0033] Figure 3 This is a schematic diagram of the connection structure of the vertical rod, horizontal support, suction tube, and drive component;

[0034] Figure 4 This is a structural schematic diagram of an automatic closed suction device from another perspective;

[0035] Figure 5This is a schematic diagram of the connection structure between the multi-channel connector and the suction catheter;

[0036] Figure 6 This is a schematic diagram of the internal structure of the flushing pump. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments.

[0038] It should be noted that in the following specific implementation, the term "distal" refers to the end closer to the patient, and the term "proximal" refers to the end further away from the patient.

[0039] like Figure 1 As shown, an automatic closed suction device according to one embodiment of the present invention includes a body 1, a suction tube 3, and a drive mechanism for feeding and withdrawing the suction tube 3.

[0040] like Figure 2 As shown, the lower part of the body 1 is a box-type structure, and a vertical rod 11 is installed on the top of the body 1, which is connected to a horizontal support 12. A waste liquid collection container 2 is placed inside the body 1. The waste liquid collection container 2 has a suction port 201 and an inlet port 202. The suction port 201 is connected to a negative pressure machine 21 through a pipe (not shown in the figure). The negative pressure machine 21 is also placed inside the body 1.

[0041] The suction catheter 3 is a closed suction catheter, which has an inner tube 31 and a sheath 32. Figure 5 As shown). Figures 1 to 3 As shown, the rear portion of the suction catheter 3 is placed within the transverse support 12. The rear end of the suction catheter 3 has a negative pressure valve 33, which is connected to the inlet 202 of the waste collection container 2 via a negative pressure tube 22. The front end of the suction catheter 3 is connected to a multi-channel connector 4, which includes at least a proximal port 41, a distal port 42, and an oxygen inlet port 43. The oxygen inlet port 43 is used to connect to a ventilator, the distal port 42 is used to connect to an artificial airway, and the proximal port 41 is connected to the suction catheter 3. The distal port 42 and proximal port 41 of the multi-channel connector 4 are axially aligned, and the inner tube 31 can pass through when the suction catheter 3 needs to be inserted into the patient's airway.

[0042] During suctioning, the drive mechanism advances the inner tube 31 of the suction catheter 3. The outer sheath 32 of the inner tube 31 automatically stacks together. The inner tube 31 is sequentially inserted into the patient's trachea through the proximal port 41, the distal port 42, and the artificial airway, forming a suction channel. The negative pressure machine 21 and the negative pressure valve 33 are activated, and sputum enters the inner tube 31. Due to the negative pressure suction, the sputum sequentially passes through the inner tube 31 and the negative pressure tube 22, and enters the waste collection container 2 through the inlet 202. This automatic closed suctioning device can automatically deliver the inner tube 31 of the suction catheter 3 into the patient's trachea and can perform mechanized automatic suctioning, reducing the workload of medical staff.

[0043] The negative pressure pipe 22 can be made of PVC. The connection end between the negative pressure pipe 22 and the negative pressure valve 33 is a spiral structure formed by thermoforming and heating. During installation, the negative pressure pipe 22 is installed in a spiral state within the horizontal bracket 12, and the spiral negative pressure pipe 22 is housed within the horizontal bracket 12. Figure 3 and 4 As shown, the spiral-shaped negative pressure tube 22 has reserved the slack required for the movement of the suction tube 3. When the inner tube 31 is inserted into the patient's airway, the spiral-shaped negative pressure tube 22 is stretched. After the suction tube 3 is reset, the negative pressure tube 22 will also be reset.

[0044] like Figure 1 As shown, the drive mechanism may include two parts: a front drive mechanism 6 and a rear drive mechanism 5. The front drive mechanism 6 mainly controls the suction tube 3 at the front end and can apply force to the inner tube 31 during tube insertion. The rear drive mechanism 5 mainly controls the suction tube 3 at the rear end, pushing the entire suction tube 3 from the rear end during insertion and resetting the entire suction tube 3 during tube withdrawal.

[0045] like Figures 1 to 3 As shown, the rear drive mechanism 5 specifically includes a moving block 51, a long rack 52, and a gear 53. The transverse support 12 includes a housing 121 and a top cover 122. The housing 121 and the top cover 122, when combined, form a guide rail 120 through which the moving block 51 passes. The long rack 52 is fixedly installed on the inner side wall of the transverse support 12. The gear 53 is rotatably installed inside the moving block 51. The gear 53 is connected to a drive element 54, which is a motor. The gear 53 meshes with the long rack 52. The drive element 54 drives the gear 53 to rotate, and the gear 53 moves along the long rack 52. The moving block 51 moves with the gear 53. In this way, driving the moving block 51 to move controls the insertion or withdrawal of the suction tube 3, that is, the forward or backward movement of the inner tube 31, and the stacking or unfolding of the membrane 32. When suctioning is required, the moving block 51 moves forward, pushing the suction tube 3 forward and inserting the inner tube 31 into the patient's trachea. The sheath 32 stacks up as the inner tube 31 moves forward. After suctioning is completed, the moving block 51 retracts through the engagement of gear 53 and long rack 52, and the suction tube 3 returns to its original position.

[0046] The control structure for the negative pressure valve 33 switch is integrated on the moving block 51, which makes suctioning after tube insertion and suctioning the inner wall of the suction tube 3 more convenient.

[0047] A movable pressing block 55 is installed inside the movable block 51. The pressing block 55 can be designed in a stepped shape, with the stepped part of the pressing block 55 abutting against the switch of the negative pressure valve 33. A rack 56 is machined on the side of the pressing block 55, which meshes with a gear 57. The gear 57 is connected to a driving component 58, which is a motor. The driving component 58 drives the gear 57 to rotate, and the gear 57 meshes with the rack 56, driving the pressing block 55 to move left and right relative to the switch of the negative pressure valve 33, thereby controlling the opening and closing of the negative pressure valve 33. The left and right movement of the pressing block 55 simulates manually pressing the switch of the negative pressure valve 33.

[0048] If the front drive mechanism 6 is not configured, the front end of the suction tube 3 needs to be fixed inside the transverse support 12, and the multi-channel connector 4 is located outside the transverse support 12. This ensures that when the inner tube 31 is inserted into the patient's trachea, the sheath 32 is stacked inside the transverse support 12 and does not affect the suctioning of the inner tube 31.

[0049] like Figure 2 and 3 As shown, the front drive mechanism 6 specifically includes a front end frame 61 and rotatable rollers 62 symmetrically arranged relative to the suction tube 3. The front end frame 61 is connected to the front end of the transverse support 12. Each roller 62 is connected to a drive component 63, which is a motor. Each roller 62 has a displacement block 64 below it, and the drive component 63 is fixed to the displacement block 64. The side of the displacement block 64 is provided with a rack 65, which is meshed with a gear 66. The gear 66 is connected to a drive component 67, which is a motor. When the drive component 67 drives the gear 66 to rotate, the gear 66 meshes with the rack 65, driving the displacement block 64 to separate to both sides or move inward, causing the two symmetrical rollers 62 on the displacement block 64 to separate outward or clamp inward. When the rollers 62 clamp inward and rotate, they can drive the inner tube 31 forward and the sleeves to stack.

[0050] When suctioning is required, the gear 366 meshes with the rack 365 to control the displacement blocks 64 on both sides of the suction tube 3 to move inward. The rollers 62 on both sides clamp the suction tube 3. The drive component 463 drives the rollers 62 to rotate. The rotating rollers 62 can make the sheath 32 and the inner tube 31 move forward. At the same time, the rear drive mechanism 5 is also activated. The moving block 51 pushes the suction tube 3 from the rear end of the suction tube 3. The inner tube 31 enters the patient's trachea through the multi-channel connector 4. The sheath 32 is stacked in the front frame 61. When the rollers 62 rotate, after the inner tube 31 is delivered into place, the gear 36 meshes with the rack 365 to control the displacement blocks 64 on both sides to move outward. The rollers 62 on both sides release the suction tube 3, start the negative pressure machine 21 and the negative pressure valve 33, and start automatic suctioning. After suctioning is completed, the rear drive device retracts the moving block 51 through the meshing of gear 53 and long rack 52, the inner tube 31 retracts, the sheath 32 expands, and the suction tube 3 is reset.

[0051] like Figure 5 As shown, the automatic closed suction device also includes a moist rinsing mechanism, which includes a storage bottle 71 and a rinsing tube 72. A rinsing pump 73 is installed on the rinsing tube 72. The rinsing pump 73 is a peristaltic pump, and the pump internally can employ... Figure 6 The structure is shown. The multi-channel connector 4 has a flushing connector 44, and both ends of the flushing tube 72 are connected to the reservoir bottle 71 and the flushing connector 44, respectively. The reservoir bottle 71 contains physiological saline. A valve can be installed inside the multi-channel connector 4. During suctioning, the inner tube 31 passes through the valve and enters the patient's trachea from the distal port 42; when not suctioning, the valve can prevent the flushing fluid from flowing into other ports of the multi-channel connector 4, so that the fluid can only enter the inner tube 31 of the suction tube 3.

[0052] When suctioning is required, the tube is inserted first. As the inner tube 31 advances, the flushing pump 73 is activated, and the saline solution in the reservoir 71 is delivered to the outer wall of the inner tube 31 through the flushing tube 72 to moisten the inner tube 31. Slowly adding liquid during insertion of the inner tube 31 moistens its surface, making it easier for the inner tube 31 to slide into the patient's trachea and reducing the risk of tracheal abrasion. Additionally, after a period of breathing, the inner wall of the patient's trachea is relatively dry, and this fluid helps to moisten the inner wall, protecting the patient's trachea.

[0053] After suctioning, the suction catheter 3 and the negative pressure tube 22 need to be flushed. The flushing pump 73, negative pressure machine 21, and negative pressure valve 33 are activated. The saline solution in the storage bottle 71 is delivered through the flushing tube 72 to the distal end of the inner tube 31 and enters the interior of the inner tube 31 to clean it and the negative pressure tube 22. The flushing waste liquid is collected and disposed of in the waste liquid collection container 2. Cleaning the inside of the negative pressure tube 22 and the suction catheter 3 prevents blockage and bacterial growth. This cleaning can be performed after each suctioning session, which helps reduce the patient's risk of infection.

[0054] like Figure 5 As shown, the multi-channel connector 4 also includes a drug delivery tube 45, which can be used to administer medication when needed, making it very convenient.

[0055] like Figure 4 As shown, the front frame 61 is connected to the transverse support 12 via a universal joint 123. This allows the front frame 61 to rotate or be slightly adjusted up and down relative to the transverse support 12 to adjust its height relative to the artificial airway or ventilator at the patient end. The transverse support 12 is connected to the vertical rod 11 via a universal joint 124. Therefore, it can be fixed and moved at any angle, facilitating connection of the automatic closed suction device to the patient end and enabling medical staff to perform cleaning, back percussion, and other nursing care on the patient.

[0056] The automatic closed suction device has an automated control system with automated procedures for tube feeding, tube withdrawal, suctioning, and rinsing. It can also set the suction interval and the duration of each suctioning session, and is equipped with a complete self-testing system and alarm system.

[0057] The following describes in detail the suctioning method using the aforementioned automatic closed suctioning device, including the following steps:

[0058] After the system detects that the automatic closed suction device is functioning normally, operation begins:

[0059] S1: Tube delivery: Start drive component three 67, gear three 66 meshes with rack three 65, two displacement blocks 64 drive symmetrical rollers 62 to move closer to suction tube 3, the two rollers 62 clamp suction tube 3, at the same time start drive component four 63, drive component one 54 and flushing pump 73, drive component four 63 makes rollers 62 rotate, drive component one 54 makes moving block 51 move forward, the inner tube 31 advances from the front and rear ends of suction tube 3, during the advance of inner tube 31, the physiological saline in the reservoir bottle 71 is delivered to the outer wall of inner tube 31 through flushing tube 72, the liquid wets the surface of inner tube 31, making it easier for inner tube 31 to slide into the patient's trachea and wet the inner wall of the patient's trachea. When inner tube 31 advances, the sheath 32 stacks, inner tube 31 is delivered into the patient's trachea through distal port 42 and artificial airway to form suction channel. After the inner tube 31 is delivered into place, the roller 62 stops rotating. The drive component 3 67 drives the displacement block 64 to separate the roller 62 to both sides. The roller 62 releases the suction tube 3 to ensure smooth subsequent suctioning.

[0060] S2: Suctioning: After the inner tube 31 is inserted into the patient's trachea, the negative pressure machine 21 is turned on, the second drive component 58 is turned on, the second gear 57 rotates and meshes with the second rack 56, driving the pressing block 55 to move left and right, controlling the opening and closing of the negative pressure valve 33, and the sputum enters the waste liquid collection container 2 through the suction tube 3, the negative pressure tube 22, and is collected and treated uniformly.

[0061] S3: Tube Retraction: After suctioning is completed, the drive component 54 causes the gear 53 to rotate. The gear 53 meshes with the long rack 52, causing the moving block 51 to move backward. The moving block 51 drives the negative pressure valve 33, which pulls the suction tube 3 backward. The inner tube 31 of the suction tube 3 retracts, the sheath 32 expands, and the suction tube 3 is reset.

[0062] S4: Flushing: Turn on the negative pressure machine 21, start the drive unit 2 58, open the negative pressure valve 33, and at the same time, turn on the flushing pump 73. The saline in the storage bottle 71 is transported through the flushing tube 72 to the far end of the inner tube 31 and enters the interior of the inner tube 31. The liquid enters the waste liquid collection container 2 through the inner tube 31 and the negative pressure tube 22 for unified collection and treatment, thus completing the flushing of the suction tube 3 and the negative pressure tube 22.

[0063] This suctioning method moistens the surface of the inner tube 31 during insertion, making it easier for the suction tube 3 to slide into the patient's trachea and reducing the risk of tracheal abrasion. At the same time, it moistens the inner wall of the patient's trachea. After suctioning is completed, the negative pressure tube 22 and the inside of the suction tube 3 are cleaned in time to prevent the tube from becoming blocked and causing bacteria to grow.

[0064] The automatic closed suction device provided by this invention pushes the front and rear parts of the suction tube 3 simultaneously through the front drive mechanism 6 and the rear drive mechanism 5. Rotatable rollers 62 on both sides of the suction tube 3 clamp the tube 3, and the rollers 62 rotate while the moving block 51 pushes the suction tube 3 forward, driving the inner tube 31 forward and the sheath 32 to stack, thus achieving automatic insertion of the suction tube 3. Simultaneously, liquid from the storage bottle 71 is delivered to moisten the outer wall of the inner tube 31, making it easier for the inner tube 31 to slide into the patient's trachea and reducing the risk of tracheal abrasion. After insertion, the rollers 62 separate to both sides, releasing the inner tube 31. The left-right moving pressing block 55 automatically presses the negative pressure valve 33, activating the negative pressure machine 21 and the negative pressure valve 33 switch, achieving automatic suctioning. The sputum is collected in the waste collection container 2 for unified collection and treatment. After suctioning is completed, the moving block 51 drives the suction tube 3 backward, and the suction tube 3 automatically retracts and resets. By turning on the negative pressure machine 21 and the negative pressure valve 33, the liquid in the liquid storage bottle 71 is used to automatically flush the suction tube 3 and the negative pressure tube 22. The sputum and the waste liquid after flushing can be collected and treated in the waste liquid collection container 2.

[0065] Automatic sputum suction using this closed-loop suction device eliminates the need for medical staff to make rounds, significantly reducing their workload. The device is also easy to adjust when connected to the patient, making it convenient for medical staff to perform cleaning, back patting, and other nursing care, thus reducing patient discomfort.

[0066] The above descriptions are merely some embodiments of the present invention. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An automatic closed suction device, characterized in that, include: The machine body is provided with a vertical rod, which is connected to a horizontal support. A waste liquid collection container is provided inside the machine body. The waste liquid collection container is provided with a suction port and an inlet port. The suction port is connected to a negative pressure machine. A suction catheter, comprising an inner tube and a sheath, wherein the rear portion of the suction catheter is placed within a transverse support, and a negative pressure valve is connected to the rear end of the suction catheter, the negative pressure valve being connected to the inlet of a waste fluid collection container via a negative pressure tube, and a multi-channel connector is connected to the front end of the suction catheter, the multi-channel connector including a proximal port, a distal port, and an oxygen inlet port, the oxygen inlet port being used to connect to a ventilator, the distal port being used to connect to an artificial airway, and the distal port being axially aligned with the proximal port and allowing the inner tube to pass through; The driving mechanism includes a rear driving mechanism, which comprises a moving block, a long rack, and a gear. The transverse support has a guide rail for the moving block to pass through. The long rack is fixed inside the transverse support. The gear is rotatably mounted inside the moving block and meshes with the long rack. The gear is connected to a driving component. The gear rotates and meshes with the long rack to drive the moving block to move, thereby controlling the forward or backward movement of the inner tube and the stacking or expansion of the membrane. The inner tube is delivered into the patient's trachea through the distal port and the artificial airway to form a suction channel. The negative pressure machine and negative pressure valve are opened, and waste liquid is collected and treated uniformly through the suction tube, the negative pressure tube, and the waste liquid collection container.

2. The automatic closed suction device according to claim 1, characterized in that, The movable block contains a movable pressing block that abuts against the switch of the negative pressure valve. The side of the pressing block is provided with a rack, which is meshed with a gear. The gear is connected to a driving component. The gear rotates and meshes with the rack to drive the pressing block to move and control the switch of the negative pressure valve.

3. The automatic closed suction device according to claim 2, characterized in that, The driving mechanism includes a front driving mechanism, which includes a front end frame and rotatable rollers symmetrically arranged relative to the suction tube. The front end frame is connected to a transverse support. The rollers are connected to a driving component four. A displacement block is provided below the rollers. A rack three is provided on the side of the displacement block. The rack three is meshed with a gear three. The gear three is connected to the driving component three. The gear three rotates and meshes with the rack three, driving the displacement block to drive the symmetrical rollers to clamp inward or separate outward. When the rollers clamp inward and rotate, they can drive the inner tube forward and the sleeves to stack.

4. The automatic closed suction device according to claim 3, characterized in that, The front frame and the transverse support are connected by a universal joint.

5. The automatic closed suction device according to any one of claims 1 to 4, characterized in that, It also includes a humidifying rinsing mechanism, which includes a liquid storage bottle and a rinsing tube. The multi-channel connector also includes a rinsing connector. The two ends of the rinsing tube are respectively connected to the liquid storage bottle and the rinsing connector. A rinsing pump is provided on the rinsing tube. As the inner tube moves forward, the liquid in the storage bottle is transported to the outer wall of the inner tube through the flushing tube to moisten the inner tube; After suctioning, the liquid in the storage bottle is transported through the flushing tube to the distal end of the inner tube to clean the inner tube and the negative pressure tube. The waste liquid is collected and treated in a waste liquid collection container.

6. The automatic closed suction device according to claim 5, characterized in that, The multi-channel connector also includes a dosing tube.

7. The automatic closed suction device according to claim 1, characterized in that, The negative pressure tube is coiled at one end near the negative pressure valve. The coiled negative pressure tube is housed in a horizontal support. When the inner tube moves forward, the coiled negative pressure tube is elongated.

8. The automatic closed suction device according to claim 1, characterized in that, The horizontal support and the vertical rod are connected by a universal joint.

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