Sputum suction device for cardiac monitoring

Abstract

The invention relates to the technical field of medical equipment, in particular to a sputum suction device for extracardiac monitoring, which comprises a device body and an adsorption tube, the device body is detachably connected with a sputum collection bottle, and the device body is communicated with external negative pressure equipment to generate negative pressure suction on the adsorption tube. One end of the adsorption tube is detachably connected with the device body, the other end of the adsorption tube is a free end provided with adsorption holes, and a plurality of arc-shaped protrusions are evenly distributed on the outer wall of the free end of the adsorption tube to prevent mucous membrane tissue of a patient from being attached to the adsorption holes. According to the scheme, the arc-shaped convex points are arranged on the adsorption tube, the adsorption head can be effectively prevented from being tightly attached to the inner wall of the respiratory tract of a patient during negative-pressure adsorption, and then the situation that mucous membrane tissue on the inner wall of the respiratory tract blocks the adsorption holes and consequently the tissue on the inner wall of the respiratory tract is adsorbed and damaged is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a suction device for cardiac monitoring. Background Technology

[0002] In the postoperative monitoring stage of cardiac surgery, such as congenital heart disease, valvular heart disease, coronary heart disease, thoracic aortic aneurysm, pericardial disease, cardiac tumor, etc., it is necessary to use a suction device to absorb and clear sputum in the patient's airway. During the suctioning process, the suction hole on the suction tube of the existing suction device is easily blocked by the mucous membrane tissue on the inner wall of the patient's airway, causing damage to the inner wall tissue of the airway by strong suction, and easily reducing the suctioning effect. Summary of the Invention

[0003] The purpose of this invention is to provide a suction device for cardiac monitoring, in order to solve the problem mentioned in the background art that the suction pores on the suction tube of the existing suction device are easily blocked by the mucous membrane tissue on the inner wall of the patient's respiratory tract, causing damage to the inner wall tissue of the respiratory tract by strong suction, and easily reducing the suction effect.

[0004] To achieve the above objectives, the basic solution of the present invention is as follows: A suction device for cardiac monitoring includes a device body and an adsorption tube. A sputum collection bottle for collecting sputum is detachably connected to the device body. The device body is connected to an external negative pressure device to generate negative pressure to attract the adsorption tube. One end of the adsorption tube is detachably connected to the device body, and the other end of the adsorption tube is a free end with an adsorption hole. Several arc-shaped protrusions are evenly distributed on the outer wall of the free end of the adsorption tube to prevent the patient's mucosal tissue from getting close to the adsorption hole.

[0005] In the above scheme, the evenly distributed arc-shaped protrusions on one end of the suction tube prevent the mucosal tissue in the patient's airway from sticking to the suction hole during the suctioning process, thus avoiding the suction hole being blocked by the mucosal tissue and damaging the airway mucosal tissue.

[0006] Furthermore, the adsorption tube includes a connecting tube and an adsorption head. The adsorption head is connected to one end of the connecting tube, and the other end of the connecting tube is connected to the device body. The arc-shaped protrusion and the adsorption hole are both disposed on the adsorption head.

[0007] Furthermore, the adsorption head includes an inner cylinder with one open end and an elastic membrane covering the outer side of the inner cylinder. The open end of the inner cylinder is sealed and connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the device body. The adsorption holes are strip-shaped holes evenly distributed circumferentially on the side wall of the inner cylinder. The strip-shaped holes are arranged along the length direction of the adsorption head. The elastic membrane is provided with slits along the length direction of the adsorption holes at the corresponding positions. The slits are forced to open when a negative pressure is generated in the inner cavity of the inner cylinder so that the inner cavity of the inner cylinder is connected to the external space of the inner cylinder. The arc-shaped protrusions are provided on the outer wall of the elastic membrane that is in contact with the inner cylinder.

[0008] Furthermore, the device body includes a front end and a rear end. The front end is a rotating body. A connecting shaft protrudes from the end face of the front end near the rear end along the axis of the front end. A channel is provided inside the front end along the axis of the front end. An installation cavity is provided inside the rear end. The installation cavity is connected to an external negative pressure device through a negative pressure pipe. The connecting shaft extends into the installation cavity and is rotatably connected to the rear end.

[0009] During the suctioning of sputum from a patient's airway, the front end can be rotated to drive the suction tube to rotate, continuously changing the position of the suction holes on the suction head to absorb sputum from various parts of the airway. The continuous change in the position of the suction holes on the suction head prevents the suction holes from continuously adsorbing the same mucosal tissue at the same location on the patient's airway wall, which could cause suction injury. When the suction head rotates, the protrusions on the suction head scrape the sputum attached to the airway wall, causing the sputum to detach from the airway wall and be absorbed by the suction holes, thus improving the suction efficiency and achieving a more thorough cleaning effect on the patient's airway.

[0010] Furthermore, the device body also includes a rotary drive mechanism for driving the front end to reciprocate. The rotary drive mechanism includes a drive motor disposed in the mounting cavity, an incomplete gear coaxially fixedly connected to the output shaft of the drive motor, a driven gear coaxially fixedly connected to the connecting shaft, and a cylindrical elastic sheet for forcing the front end to reset. The incomplete gear meshes with the driven gear, and the two ends of the cylindrical elastic sheet are respectively sealed and fixedly sleeved on the outer wall of the end of the front end and the rear end that are close to each other, so that the cylindrical elastic sheet is in a tensioned state.

[0011] When suctioning sputum from a patient's airway, the drive motor operates. The incomplete gear drives the driven gear to rotate a certain angle, after which the incomplete gear disengages from the driven gear. The rotation of the driven gear causes the front end to rotate a certain angle, resulting in the torsional deformation of the cylindrical elastic sheet. When the incomplete gear disengages from the driven gear, the torsional deformation of the cylindrical elastic sheet forces the front end to rotate back to its original position. Once the incomplete gear rotates again to mesh with the driven gear, it again forces the front end to rotate a certain angle. Thus, under the combined action of the drive motor and the cylindrical elastic sheet, the front end drives the connecting tube and suction head to rotate reciprocally. The cylindrical elastic sheet also seals the gap between the front and rear ends, preventing gas from entering the mounting cavity through the gap between the connecting shaft and the front end, thus preventing pressure loss.

[0012] Furthermore, the rear end near the front end is configured as a rotating body that is coaxial with the front end and has the same outer diameter.

[0013] Furthermore, a circular connecting post protrudes from the outer wall of the rear end, and the sputum collection bottle is threadedly sealed to the connecting post. Pipe 1 and pipe 2 are provided in the mounting cavity. One end of pipe 1 covers the end of the connecting shaft located in the mounting cavity and is coaxially spaced with the connecting shaft. The other end of pipe 1 passes through the connecting post and extends into the sputum collection bottle. One end of pipe 2 passes through the connecting post and extends into the sputum collection bottle. The other end of pipe 2 passes through the mounting cavity and is sealed and connected to the negative pressure pipe.

[0014] Furthermore, a suction control mechanism is provided on the rear end. The suction control mechanism includes an outer cylinder disposed on the rear end and a sliding column that is slidably and sealingly connected to the inner wall of the outer cylinder. The outer cylinder has openings at both ends and passes through the side wall of the rear end so that the inner end of the outer cylinder communicates with the mounting cavity. The outer cylinder wall located outside the rear end has a plurality of vent holes evenly distributed circumferentially to communicate the inner cavity of the outer cylinder with the external space of the rear end. The outer end of the sliding column extends out of the outer cylinder. A spring is disposed inside the outer cylinder along the axial direction of the outer cylinder. One end of the spring is fixedly connected to the inner end of the sliding column, and the other end of the spring is fixedly connected to the inner wall of the outer cylinder. Under the elastic force of the spring, the sliding column is positioned to keep the vent holes unobstructed.

[0015] When the adsorption tube is inserted into the patient's airway and connected to the external negative pressure device, without pressing down the slide column to block the vent, external air can enter the sputum collection bottle through the vent and the gap between the pipe and the outer wall of the connecting shaft. When the external negative pressure device is activated, the sudden negative pressure generated by the external negative pressure device will not cause an adsorption impact on the patient. When it is necessary to increase the adsorption force on the patient's airway, medical staff press the slide column to slide it closer to the installation cavity, reducing the flow area of ​​the vent. This increases the adsorption force on the patient's airway without changing the adsorption power of the external adsorption device. The suction control mechanism allows medical staff to adjust the adsorption force in a timely manner according to the patient's reaction and the adsorption effect during the adsorption process.

[0016] Furthermore, the sputum collection bottle is a transparent bottle, made of glass or acrylic.

[0017] Furthermore, the closed end of the inner cylinder is configured as an arc shape.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects: 1. In this design, the outer wall of the elastic membrane is provided with arc-shaped protrusions, which can effectively prevent the adsorption head from sticking to the inner wall of the patient's airway during negative pressure adsorption, thereby effectively preventing the mucous membrane tissue on the inner wall of the airway from blocking the adsorption pores and causing damage to the inner wall tissue of the airway due to adsorption.

[0019] 2. In this solution, driven by the drive motor and the action of the cylindrical elastic sheet, the adsorption head reciprocates, causing the adsorption holes on the adsorption head to continuously change position. This prevents the adsorption holes from continuously adsorbing the mucosal tissue at the same location on the inner wall of the patient's respiratory tract, which could cause suction injury. When the adsorption head rotates, the arc-shaped protrusion on the adsorption head scrapes the sputum attached to the inner wall of the respiratory tract, causing the sputum to detach from the inner wall of the respiratory tract and be adsorbed by the adsorption holes, thereby improving the adsorption efficiency and making the airway cleaning effect on the patient more thorough.

[0020] 3. In this solution, the cylindrical elastic sheet not only serves to reset the front end, but also to seal and prevent pressure leakage. The use of the cylindrical elastic sheet means that only the rotational connection between the front and rear ends needs to be considered, without having to consider the air pressure leakage during adsorption, or the sealing connection between the connecting shaft and the rear end sidewall, resulting in lower manufacturing costs.

[0021] 4. In this design, when adsorption stops, the elastic membranes on both sides of the slit at the adsorption hole come into contact with each other again, which can prevent sputum inside the adsorption head from flowing out of the adsorption head.

[0022] 5. This solution includes suction control, allowing the operator to adjust the suction force at any time based on the patient's clinical presentation and the adsorption effect.

[0023] 6. During the suctioning process of this solution, sputum will not enter the installation cavity and come into contact with the suction control mechanism, and the suction control mechanism will not be contaminated by sputum. Attached Figure Description

[0024] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0025] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a suction device for cardiac monitoring according to the present invention, viewed from the front.

[0026] Figure 2 This is a top-view structural diagram of a suction device for cardiac monitoring according to the present invention.

[0027] Figure 3 for Figure 1 Enlarged view of section A.

[0028] Figure 4 for Figure 1 Enlarged view of section B in the middle.

[0029] Figure 5 This is a schematic diagram of the adsorption head structure.

[0030] Figure 6 Before suctioning Figure 5 Sectional view of AA.

[0031] Figure 7 When performing suctioning Figure 5 Sectional view of AA.

[0032] Figure 8 This is a schematic diagram of the engagement between an incomplete gear and a driven gear in the left-view direction.

[0033] The meanings of the labels in the attached diagram are as follows: Device body 10; front end 101; connecting shaft 1011; channel 1012; Rear end 102; Mounting cavity 1021; Mounting hole 1022; Mounting plate 1023; Connecting post 1024; Pipe 1 1025; Pipe 2 1026; Support plate 1027; Drive motor 1031; output shaft 10311; incomplete gear 1032; driven gear 1033; cylindrical elastic sheet 1034; battery box 1035; Adsorption tube 20; connecting tube 201; adsorption head 202; inner cylinder 2021; adsorption hole 20211; elastic membrane 2022; slit 20221; arc-shaped protrusion 2023; 30 sputum collection bottles; Negative pressure pipe 40; Outer cylinder 51; Vent hole 511; Sliding column 52; Spring 53; Double-direction thrust bearing 60. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0036] This embodiment provides a suction device for cardiac monitoring, such as... Figures 1-8 As shown, the device includes a main body 10 and an adsorption tube 20. A sputum collection bottle 30 for collecting sputum is detachably connected to the main body 10. The main body 10 is connected to an external negative pressure device to generate negative pressure to attract the adsorption tube 20. One end of the adsorption tube 20 is detachably connected to the main body 10, and the other end of the adsorption tube 20 is a free end with an adsorption hole 20211. Several arc-shaped protrusions 2023 are evenly distributed on the outer wall of the free end of the adsorption tube 20 to prevent the patient's mucosal tissue from getting close to the adsorption hole 20211.

[0037] The free end of the adsorption tube 20 is the end that extends into the patient's airway. The evenly distributed arc-shaped protrusions 2023 on the free end of the adsorption tube 20 prevent the mucosal tissue in the patient's airway from adhering to the adsorption hole 20211 during the suctioning process, thus preventing the adsorption hole 20211 from being blocked by the mucosal tissue and damaging the airway mucosal tissue.

[0038] The device body 10 includes a front end portion 101 and a rear end portion 102, which are separately disposed, and a rotary drive mechanism for driving the front end portion 101 to reciprocate relative to the rear end portion 102. The front end portion 101 is a rotating body. A connecting shaft 1011 protrudes along the axis of the front end portion 101 on its end face near the rear end portion 102. The connecting shaft 1011 is fixedly connected to the front end portion 101. Preferably, the connecting shaft 1011 is integrally formed with the front end portion 101. A through-hole is provided inside the front end portion 101 along its axis, penetrating both the front end portion 101 and the connecting shaft 1011. In channel 1012, the rear end 102 near the front end 101 is configured as a rotating body coaxial with the front end 101 and having the same outer diameter. The remaining part of the rear end 102 can be configured as a non-rotating body for easy gripping or as a rotating body. An installation cavity 1021 is provided inside the rear end 102. The installation cavity 1021 is connected to an external negative pressure device through a negative pressure pipe 40. The external negative pressure device mentioned in this solution usually refers to the negative pressure connector uniformly configured in the monitoring room of a hospital. This negative pressure connector can be connected to relevant medical equipment to provide negative pressure to the medical equipment. The connecting shaft 1011 extends into the mounting cavity 1021 and is rotatably connected to the rear end 102. A bearing hole coaxial with the connecting shaft 1011 is provided on the side wall of the rear end 102 near the front end 101. A bidirectional thrust bearing 60 is installed in the bearing hole. The connecting shaft 1011 is rotatably connected to the rear end 102 through the bidirectional thrust bearing 60. The outer wall of the bidirectional thrust bearing 60 is tightly fitted with the inner wall of the bearing hole. The connecting shaft 1011 is tightly fitted with the inner wall of the bidirectional thrust bearing 60.

[0039] The rotary drive mechanism includes a drive motor 1031 disposed in the mounting cavity 1021, an incomplete gear 1032 coaxially and fixedly connected to the output shaft 10311 of the drive motor 1031, a driven gear 1033 coaxially and fixedly connected to the connecting shaft 1011, and a cylindrical elastic plate 1034 for forcing the front end 101 to return to its original position. Figure 1 , Figure 2 , Figure 3 , Figure 8As shown, the driven gear 1033 is disposed at one end of the connecting shaft 1011 located within the mounting cavity 1021. The driven gear 1033 is keyed to the connecting shaft 1011. The outer wall of the connecting shaft 1011 is provided with a shoulder and a removable retaining ring for radial and axial limiting of the driven gear 1033. The teeth on the incomplete gear 1032 mesh with the driven gear 1033. The cylindrical elastic sheet 1034 is made of elastic rubber, and one end of the cylindrical elastic sheet 1034 is sleeved on the front end 101 near the rear end. The other end of the cylindrical elastic sheet 1034 is sleeved on the outer wall of the rear end 102 near the front end 101 and is sealed and fixedly connected to the rear end 102. The cylindrical elastic sheet 1034 is in a tensioned state. When the front end 101 rotates relative to the rear end 102 around the axis of the connecting shaft 1011, causing the cylindrical elastic sheet 1034 to undergo torsional deformation, the cylindrical elastic sheet 1034 is torsional and stretched, thereby having an elastic force that causes the front end 101 to rotate back to its original position. To facilitate the installation and maintenance of the drive motor 1031, a mounting hole 1022 can be provided on the rear end 102. A mounting plate 1023, which seals the mounting hole 1022 with screws, is connected to the mounting plate 1023 to seal the mounting hole 1022. A support plate 1027 is provided on the mounting plate 1023 to support the output shaft 10311 of the drive motor 1031. The output shaft 10311 of the drive motor 1031 is rotatably connected to the support plate 1027. During installation, the incomplete gear 1032 is first coaxially fixedly connected to the output shaft 10311 of the drive motor 1031, and then the drive motor 1031 is fixedly mounted on the mounting plate 1023. Mounting plate 1023 is then installed on mounting hole 1022 using screws to seal mounting hole 1022. After mounting plate 1023 is installed, mounting hole 1022 is sealed and cannot be vented. Understandably, a start switch for controlling the operation and stop of drive motor 1031 can be provided on the rear end 102. Battery box 1035 is fixed in mounting cavity 1021. Rechargeable battery for providing power to drive motor 1031 is provided in battery box 1035. Charging interface for charging rechargeable battery is provided on rear end 102.When the drive motor 1031 is running, the incomplete gear 1032 drives the driven gear 1033 to rotate a certain angle. After the incomplete gear 1032 and the driven gear 1033 disengage, the driven gear 1033 rotates, causing the front end 101 to rotate a certain angle, which causes the cylindrical elastic sheet 1034 to undergo torsional deformation. When the teeth on the incomplete gear 1032 disengage from the driven gear 1033, the torsional deformation of the cylindrical elastic sheet 1034 forces the front end 101 to rotate back to its original position. When the incomplete gear 1032 rotates again to mesh with the driven gear 1033, it forces the front end 101 to rotate a certain angle again. In this way, under the combined action of the drive motor 1031 and the cylindrical elastic sheet 1034, the front end 101 reciprocates relative to the rear end 102. The cylindrical elastic sheet 1034 simultaneously seals the gap between the front end 101 and the rear end 102, preventing gas from entering the mounting cavity 1021 through the gap between the connecting shaft 1011 and the front end 101, thus preventing pressure relief. Understandably, in the application scenario of this solution, the rotation speed of the incomplete gear 1032 is relatively slow, preventing impact when the teeth of the incomplete gear 1032 mesh with the teeth of the driven gear 1033.

[0040] like Figure 1 As shown, a circular connecting post 1024 protrudes from the outer wall of the rear end portion 102. The connecting post 1024 is fixedly connected to the rear end portion 102, preferably integrally formed with the rear end portion 102. The outer wall of the connecting post 1024 is provided with external threads. The sputum collection bottle 30 is a transparent bottle made of acrylic. The inner wall of the bottle mouth of the sputum collection bottle 30 is provided with internal threads that mate with the external threads on the connecting post 1024. A sealing ring 301 with a certain elasticity is fitted around the connecting post 1024. The sealing ring 301 is sealed and fixedly connected to the outer wall of the connecting post 1024. When tightened, the bottle mouth of the sputum collection bottle 30 comes into close contact with the sealing ring 301, thus achieving a threaded sealing connection between the sputum collection bottle 30 and the connecting post 1024. Figure 1 , Figure 3As shown, the mounting cavity 1021 is equipped with a first pipe 1025 and a second pipe 1026. Both the first pipe 1025 and the second pipe 1026 are rigid pipes. One end of the first pipe 1025 covers the end of the connecting shaft 1011 located inside the mounting cavity 1021 and is coaxially arranged with the connecting shaft 1011. The inner diameter of the first pipe 1025 is larger than the outer diameter of the connecting shaft 1011, leaving a gap between the inner wall of the first pipe 1025 and the outer wall of the connecting shaft 1011. One end of pipe 1025 passes through the connecting post 1024 and extends into the sputum collection bottle 30. One end of pipe 21026 passes through the connecting post 1024 and extends into the sputum collection bottle 30. The other end of pipe 21026 passes through the mounting cavity 1021 and is sealed and connected to the negative pressure pipe 40. It can be understood that both pipe 1025 and pipe 21026 passing through the rear end 102 are sealed and connected to the side wall of the rear end 102 to prevent pressure leakage.

[0041] Combination Figure 1 , Figure 5 , Figure 6 , Figure 7As shown, the adsorption tube 20 includes a connecting tube 201 and an adsorption head 202. The connecting tube 201 is a common suction tube made of medical soft polyvinyl chloride. The adsorption head 202 includes an inner cylinder 2021 with one open end and an elastic membrane 2022 covering the inner cylinder 2021. The inner cylinder 2021 is made of rigid silicone, which has a certain resistance to deformation to prevent deformation during adsorption. The closed end of the inner cylinder 2021 is arc-shaped. The open end of the inner cylinder 2021 is sealed and fixedly connected to one end of the connecting tube 201, so that the inner cavity of the connecting tube 201 communicates with the inner cavity of the inner cylinder 2021. The other end of the connecting tube 201 is connected to the... The channel 1012 on the front end 101 is sealed and connected. Specifically, the end of the connecting tube 201 connected to the channel 1012 on the front end 101 can be set as a rigid end. A sealing ring with a certain elasticity is sealed and fixedly connected to the inner wall of the end of the channel 1012 near the connecting tube 201. Then, the rigid end can be inserted into the channel 1012 on the front end 101 so that the rigid end and the sealing ring in the channel 1012 are tightly fitted to achieve the purpose of sealing and connecting the connecting tube 201 and the channel 1012. When the adsorption tube 20 needs to be replaced, the connecting tube 201 can be pulled out and disconnected from the channel 1012, and a new connecting tube 201 can be inserted. The adsorption holes 20211 are strip-shaped holes evenly distributed circumferentially on the side wall of the inner cylinder 2021. The strip-shaped holes are arranged along the length direction of the adsorption head 202. The elastic membrane 2022 is provided with a slit 20221 at the corresponding position of the adsorption holes 20211 along the length direction of the adsorption holes 20211. The slit 20221 is formed by cutting the elastic membrane 2022 with a sharp blade along the length direction of the adsorption holes 20211. The slit 20221 is forced to open when a negative pressure is generated in the inner cavity of the inner cylinder 2021 so that the inner cavity of the inner cylinder 2021 communicates with the external space of the inner cylinder 2021. The arc-shaped protrusion 2023 protrudes from the outer wall of the elastic membrane 2022 and the inner cylinder 2021.

[0042] Furthermore, combined Figure 1 , Figure 4As shown, a suction control mechanism is provided on the rear end portion 102. The suction control mechanism includes an outer cylinder 51 disposed on the rear end and a sliding column 52 that is slidably and sealingly connected to the inner wall of the outer cylinder 51. The outer cylinder 51 is open at both ends and passes through the side wall of the rear end portion 102 so that the inner end of the outer cylinder 51 communicates with the mounting cavity 1021. The outer wall of the outer cylinder 51 is sealed and fixedly connected to the rear end portion 102. The outer cylinder 51 located outside the rear end portion 102 has its cylinder wall circumferentially... Multiple ventilation holes 511 are evenly distributed to connect the inner cavity of the outer cylinder 51 with the external space of the rear end 102. The outer end of the sliding column 52 extends out of the outer cylinder 51. A spring 53 is arranged inside the outer cylinder 51 along the axial direction of the outer cylinder 51. One end of the spring 53 is fixedly connected to the inner end of the sliding column 52, and the other end of the spring 53 is fixedly connected to the inner wall of the outer cylinder 51. Under the elastic force of the spring 53, the sliding column 52 is positioned to keep the ventilation holes 511 unobstructed.

[0043] When this invention is used, after the adsorption tube 20 is inserted into the patient's respiratory tract and connected to the external negative pressure device, without pressing down the slide column 52 to block the vent hole 511, external air can enter the sputum collection bottle 30 through the vent hole 511 and the gap between the outer wall of the pipe 1025 and the connecting shaft 1011. When the external negative pressure device is activated, the sudden negative pressure generated by the external negative pressure device will not cause adsorption impact on the patient. When it is necessary to increase the adsorption force on the patient's respiratory tract, the medical staff press the slide column 52 to slide it closer to the mounting cavity 1021, thereby reducing the flow area of ​​the vent hole 511. This increases the adsorption force on the patient's respiratory tract without changing the adsorption power of the external adsorption device. The suction control mechanism allows the medical staff to adjust the adsorption force in a timely manner according to the patient's reaction and the adsorption effect during the adsorption process.

[0044] When performing suctioning, such as Figure 7 As shown, the negative pressure inside the inner cylinder 2021 causes the elastic membrane 2022 to open axially into the inner cylinder 2021 from the slit 20221, allowing the inner cavity of the inner cylinder 2021 to communicate with the external space of the inner cylinder 2021 through the adsorption hole 20211 at that location. Sputum in the respiratory tract is adsorbed into the inner cylinder 2021 through the adsorption hole 20211 and then further adsorbed into the sputum collection bottle 30 for collection.

[0045] During the suctioning of sputum in the patient's airway, the drive motor 1031 can be operated to drive the front end 101 to rotate the suction head 202 back and forth, continuously changing the position of the suction holes 20211 on the suction head 202 to absorb sputum from various parts of the airway. The continuous change of position of the suction holes 20211 on the suction head 202 prevents the suction holes 20211 from continuously adsorbing the same mucosal tissue at the same location on the inner wall of the patient's airway, which could cause suction injury. When the suction head 202 rotates, the protrusions on the suction head 202 scrape the sputum attached to the inner wall of the airway, causing the sputum to detach from the inner wall of the airway and be absorbed by the suction holes 20211, thereby improving the adsorption efficiency and making the patient's airway cleaner more thorough.

[0046] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A suction device for cardiac monitoring, comprising a device body (10) and an adsorption tube (20), wherein a sputum collection bottle (30) for collecting sputum is detachably connected to the device body (10), the device body (10) is connected to an external negative pressure device to generate negative pressure to attract the adsorption tube (20), one end of the adsorption tube (20) is detachably connected to the device body (10), and the other end of the adsorption tube (20) is a free end provided with a plurality of adsorption holes (20211), characterized in that: The outer wall of the free end of the adsorption tube (20) is evenly distributed with several arc-shaped protrusions (2023) to prevent the patient's mucosal tissue from getting close to the adsorption hole (20211).

2. The suction device for cardiac monitoring according to claim 1, characterized in that: The adsorption tube (20) includes a connecting tube (201) and an adsorption head (202). The adsorption head (202) is connected to one end of the connecting tube (201), and the other end of the connecting tube (201) is connected to the device body (10). The arc-shaped protrusion (2023) and the adsorption hole (20211) are both provided on the adsorption head (202).

3. The suction device for cardiac monitoring according to claim 2, characterized in that: The adsorption head (202) includes an inner cylinder (2021) with one open end and an elastic membrane (2022) covering the outer side of the inner cylinder (2021). The open end of the inner cylinder (2021) is sealed and connected to one end of the connecting pipe (201). The adsorption holes (20211) are circumferentially distributed strip-shaped holes on the side wall of the inner cylinder (2021). The strip-shaped holes are arranged along the length direction of the adsorption head (202). The elastic membrane (2022) A slit (20221) is provided along the length of the adsorption hole (20211) at the location corresponding to the adsorption hole (20211). The slit (20221) is forced to open when a negative pressure is generated in the inner cavity of the inner cylinder (2021) so that the inner cavity of the inner cylinder (2021) is connected to the external space of the inner cylinder (2021). The arc-shaped protrusion (2023) protrudes on the outer wall of the joint between the elastic membrane (2022) and the inner cylinder (2021).

4. The suction device for cardiac monitoring according to claim 3, characterized in that: The device body (10) includes a front end (101) and a rear end (102). The front end (101) is a rotating body. A connecting shaft (1011) is provided on the end face of the front end (101) near the rear end (102) along the axis of the front end (101). A channel (1012) is provided in the front end (101) along the axis of the front end (101). An installation cavity (1021) is provided in the rear end (102). The installation cavity (1021) is connected to an external negative pressure device through a negative pressure pipe (40). The connecting shaft (1011) extends into the installation cavity (1021) and is rotatably connected to the rear end (102).

5. The suction device for cardiac monitoring according to claim 4, characterized in that: The device body (10) further includes a rotary drive mechanism for driving the front end (101) to reciprocate. The rotary drive mechanism includes a drive motor (1031) disposed in the mounting cavity (1021), an incomplete gear (1032) coaxially fixedly connected to the output shaft (10311) of the drive motor (1031), a driven gear (1033) coaxially fixedly connected to the connecting shaft (1011), and a cylindrical elastic sheet (1034) for forcing the front end (101) to reset. The incomplete gear (1032) meshes with the driven gear (1033). The two ends of the cylindrical elastic sheet (1034) are respectively sealed and fixedly sleeved on the outer wall of the end of the front end (101) and the rear end (102) that are close to each other, so that the cylindrical elastic sheet (1034) is in a tensioned state.

6. The suction device for cardiac monitoring according to claim 5, characterized in that: The rear end (102) near the front end (101) is configured as a rotating body that is coaxial with the front end (101) and has the same outer diameter.

7. A suction device for cardiac monitoring according to claim 6, characterized in that: The outer wall of the rear end (102) is provided with a circular connecting post (1024). The sputum collection bottle (30) is threadedly sealed to the connecting post (1024). The mounting cavity (1021) is provided with a pipe one (1025) and a pipe two (1026). One end of the pipe one (1025) is covered outside the end of the connecting shaft (1011) located in the mounting cavity (1021) and is coaxially spaced with the connecting shaft (1011). The other end of the pipe one (1025) passes through the connecting post (1024) and extends into the sputum collection bottle (30). One end of the pipe two (1026) passes through the connecting post (1024) and extends into the sputum collection bottle (30). The other end of the pipe two (1026) passes through the mounting cavity (1021) and is sealed and connected to the negative pressure pipe (40).

8. The suction device for cardiac monitoring according to claim 7, characterized in that: A suction control mechanism is provided on the rear end (102). The suction control mechanism includes an outer cylinder (51) disposed on the rear end and a sliding column (52) that is slidably and sealingly connected to the inner wall of the outer cylinder (51). The outer cylinder (51) is open at both ends and passes through the side wall of the rear end (102) so that the inner end of the outer cylinder (51) communicates with the mounting cavity (1021). The outer cylinder (51) located outside the rear end (102) has a plurality of circumferentially distributed components on its wall that connect the inner cavity of the outer cylinder (51) to the rear end (102). The external space of the end (102) is connected to the vent hole (511). The outer end of the sliding column (52) extends out of the outer cylinder (51). A spring (53) is provided inside the outer cylinder (51) along the axial direction of the outer cylinder (51). One end of the spring (53) is fixedly connected to the inner end of the sliding column (52), and the other end of the spring (53) is fixedly connected to the inner wall of the outer cylinder (51). Under the elastic force of the spring (53), the sliding column (52) is located in a position that keeps the vent hole (511) unobstructed.

9. The suction device for cardiac monitoring according to claim 1, characterized in that: The sputum collection bottle (30) is a transparent bottle.

10. The suction device for cardiac monitoring according to claim 3, characterized in that: The closed end of the inner cylinder (2021) is set to be arc-shaped.

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