Multifunctional artificial airway catheter

Abstract

The invention relates to the technical field of medical instruments, and provides a multifunctional artificial airway catheter which comprises a catheter body, an air bag, an outlet pipe set and a pressure measurer, one end of the catheter body is provided with a communication connector, and the other end of the catheter body is provided with a drainage opening and a CO2 sampling opening; the air bag comprises a sealing bag sleeve and an umbrella-shaped film fixed to one end of the sealing bag sleeve, the sealing bag sleeve is fixed and arranged outside the catheter in a sleeving mode, the umbrella-shaped film is located on the side, close to the communicating connector, of the sealing bag sleeve, and the umbrella-shaped film is also arranged outside the catheter in a sleeving mode; the outlet pipe group comprises a suction pipe, a sampling pipe and an inflation pipe; and the pressure detector is communicated with the sealing bag sleeve, so that the pressure in the sealing bag sleeve can be conveniently detected and observed. The application can reduce the possibility of downward movement of subglottic secretions into lungs. The drainage openings are formed in the two sides of the catheter, effective drainage can be still guaranteed when the patient is in the lateral position, and insufficient drainage caused by the fact that a single central drainage opening cannot be completely covered is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a multifunctional artificial airway catheter. Background Art

[0002] Maintaining a patent and unobstructed airway is crucial in medicine and emergency medicine. For patients who cannot maintain airway patency on their own or who have respiratory insufficiency, an airway tube can be an effective intervention. It helps clear secretions, blood, or other foreign matter from the airway and allows connection to a mechanical ventilator to provide oxygen or anesthetic gases.

[0003] An airway tube typically consists of a catheter, a cuff, and an indicator balloon. The catheter has a certain degree of flexibility and hardness to facilitate insertion and fixation. One end of the catheter is designed with a smooth tip to facilitate entry into the trachea, while the other end has a connector for connecting to a ventilator or other oxygen supply device. The cuff is a small inflatable bag located near the front end of the catheter. When the catheter is correctly placed, the cuff can be inflated to seal the trachea and prevent air leakage or aspiration of gastric contents. The indicator balloon is connected to the cuff and is used to display the inflation status of the cuff. Medical staff can check whether the cuff is working properly by squeezing this small balloon.

[0004] The function of airway tubes is relatively simple and is usually limited to providing an airway channel to support breathing or anesthesia. With the continuous growth of clinical needs, the demand for airway tubes that can integrate more functions is increasing. In particular, in environments such as intensive care units and emergency departments, it is often necessary to simultaneously monitor the carbon dioxide concentration in the patient's exhaled gas and ensure that the cuff is properly inflated to prevent aspiration and ensure effective mechanical ventilation. In addition, the cuffs of current airway tubes are mostly conical or spherical. Maintaining appropriate pressure when the patient is in a stable breathing state can play a sealing role. However, when the patient chokes and coughs due to various reasons, the cuff cannot play an effective sealing role. At this time, it will increase the possibility of subglottic secretions moving downward into the lungs, increasing the probability of ventilator-associated pneumonia in patients. Summary of the Invention

[0005] In order to realize the CO2 sampling and inflation functions of an artificial airway catheter and reduce the possibility of subglottic secretions migrating into the lungs, the present application provides a multifunctional artificial airway catheter. The following technical solutions are adopted: A multifunctional artificial airway catheter, comprising: A catheter having a communication port at one end and a drainage port and a CO2 sampling port at the other end; The airbag comprises a sealing cuff and an umbrella-shaped membrane fixed to one end of the sealing cuff, wherein the sealing cuff is fixed and sheathed outside the catheter, the umbrella-shaped membrane is located on a side of the sealing cuff close to the communication interface, and the umbrella-shaped membrane is also sheathed outside the catheter; The lead-out tube group includes a suction tube, a sampling tube and an inflation tube, wherein one end of the suction tube is connected to the drainage port, one end of the sampling tube is connected to the CO2 sampling port, and one end of the inflation tube is connected to the sealing bag; A pressure gauge is communicated with the sealing bag and is used to detect the pressure in the sealing bag.

[0006] By adopting the above technical solution, a connecting interface is provided at one end of the catheter, and a drainage port and a CO2 sampling port are opened at the other end, so that the catheter not only has basic functions but also can monitor CO2 concentration; when the airbag is inflated, the umbrella membrane opens, and the outer edge of the umbrella membrane fits on the tracheal mucosal wall, which has a secondary sealing effect, and the radius of the umbrella membrane is larger than the tracheal radius, so that when the patient chokes and coughs, the umbrella membrane can still effectively fit on the mucosal wall, preventing the subglottic secretions from moving down into the lungs, and achieving a good sealing effect; the lead-out tube group includes a suction tube, a sampling tube and an inflation tube, which are respectively connected to the drainage port, the CO2 sampling port and the sealing cuff, realizing multi-functional integration and convenient operation and monitoring; the pressure gauge is connected to the sealing cuff to detect the pressure in the sealing cuff to ensure that the pressure of the airbag is always kept within a safe range to avoid tissue damage caused by excessive pressure or leakage caused by too low pressure.

[0007] Optionally, the drainage ports are provided on both sides of the catheter.

[0008] By adopting the above technical solution, drainage ports are opened on both sides of the catheter, ensuring that secretions can be effectively drained even when the patient is in a lateral position, avoiding the problem of poor drainage caused by improper positioning of a single central drainage port.

[0009] Optionally, one end of the inflation tube away from the sealing bag is connected to a positive pressure interface, the pressure sensor is connected to the inflation tube, and a two-way valve is also provided on the inflation tube, and the two-way valve is located between the pressure sensor and the positive pressure interface.

[0010] By adopting this technical solution, a positive pressure port is added to the end of the inflation tube away from the sealed bag sleeve to facilitate the introduction of external gas. A manometer is connected to the inflation tube to monitor the internal pressure of the airbag in real time to ensure it is within a safe range. A two-way valve on the inflation tube, located between the manometer and the positive pressure port, controls the opening and closing of the inflation tube to the outside world, facilitating the replenishment of gas to the airbag through the inflation tube. This improves the operational convenience and safety of the entire device.

[0011] Optionally, the pressure gauge is a pressure gauge.

[0012] By adopting the above technical solution and selecting a pressure gauge as the specific form of the pressure meter, the pressure value can be presented in a simple and intuitive manner, which is convenient for real-time clinical observation and adjustment.

[0013] Optionally, the two drainage ports are arranged at intervals of 45-135° around the axis of the catheter.

[0014] By adopting the above technical solution, the two drainage ports are arranged at intervals of 45-135° around the axis of the catheter, so that secretions can still be effectively drained when the patient is in a lateral position.

[0015] Optionally, the airbag further includes a supporting capsule body, and the supporting capsule body is in communication with the sealing capsule sleeve; The support sac is located on a side of the sealing cuff close to the umbrella membrane, and a plurality of the support sacs are arranged at intervals around the axis of the catheter; When the support sac expands, the distance between the support sac and the catheter gradually increases toward the communication port.

[0016] By adopting the above technical solution, when the support sac expands, the distance between the support sac and the catheter gradually increases in the direction of the connecting interface, which promotes the expansion of the umbrella membrane and the expansion of the umbrella membrane to be set in the direction of the connecting interface; when subglottic secretions are produced and enter the trachea, the umbrella membrane can receive the secretions under the joint support of the support sac and the sealing cuff, preventing the secretions from continuing to fall into the deep part of the trachea.

[0017] Optionally, one end of the support capsule extends onto the umbrella-shaped membrane and is connected to the umbrella-shaped membrane.

[0018] By adopting the above technical solution, one end of the support sac extends to the umbrella membrane and is connected to it, so that the support sac can better support the umbrella membrane when inflated, ensuring that the umbrella membrane is more stable and firm when the outer edge fits the tracheal mucosal wall; it not only enhances the sealing effect of the airway, but also effectively prevents the airbag from failing due to the patient's choking, thereby reducing the risk of subglottic secretions moving downward into the lungs.

[0019] Optionally, the supporting capsule includes a first capsule segment and a second capsule segment that are interconnected, one end of the first capsule segment is fixed to the sealing capsule sleeve, and the second capsule segment is connected to the umbrella membrane; The inner diameter of the first sac segment is greater than the inner diameter of the second sac segment, and the length of the first sac segment is less than the length of the second sac segment.

[0020] By adopting this technical solution, the first sac segment within the support sac is fixed to the sealing cuff. It has a larger inner diameter but a shorter length, enabling rapid and stable support and guidance during inflation, ensuring stability during the deployment of the parachute membrane. The second sac segment, connected to the parachute membrane, has a smaller inner diameter but a longer length, better adapting to changes in tracheal morphology. This effectively props up the parachute sac during coughing and choking, further guiding its deployment.

[0021] Optionally, the airbag also includes a guide balloon, and the guide balloon is annular and is mounted outside the catheter; the guide balloon is located on the side of the sealing balloon close to the umbrella membrane, and when the guide balloon is inflated, the cross-sectional area of ​​the guide balloon gradually decreases in the direction away from the sealing balloon.

[0022] By adopting this technical solution, the cross-sectional area of ​​the guide bladder gradually decreases as it moves away from the sealing cuff. This not only guides the deployment of the parachute membrane, facilitating its expansion toward the communication port after deployment, but also provides support for the parachute membrane, facilitating its receipt of secretions and preventing them from entering the lungs.

[0023] In summary, this application has at least one of the following beneficial effects: 1. This application is provided with an umbrella-shaped membrane. After the airbag is inflated, the umbrella-shaped membrane adheres to the tracheal mucosal wall, maintaining a good sealing effect even when the patient chokes and coughs, effectively preventing subglottic secretions from flowing into the lungs and reducing the risk of ventilator-associated pneumonia. 2. The catheter in this application is provided with drainage ports on both sides, which can ensure effective drainage even when the patient is in the lateral position, avoiding the problem of insufficient drainage caused by a single central drainage port that cannot completely drain secretions around the catheter. 3. The catheter in this application is provided with a connection interface and a CO2 sampling port at one end, which realizes the basic functions and can also monitor the CO2 concentration, which helps to assess the patient's respiratory status in real time; 4. In this application, the pressure gauge is connected to the sealed bag to monitor the pressure inside the airbag in real time, ensuring that the airbag is always within the appropriate pressure range, further improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a multifunctional artificial airway catheter in Example 1 of the present application; Figure 2 This is a schematic diagram of the partial structure of the multifunctional artificial airway catheter showing the distribution positions of the CO2 sampling port and the drainage port on the catheter in Example 1 of the present application; Figure 3 Schematic diagram of the structure of the airbag in Example 1 of the present application; Figure 4 This is a schematic diagram of the partial structure of the multifunctional artificial airway catheter showing the inflation tube in Example 1 of the present application; Figure 5 This is a schematic structural diagram of a multifunctional artificial airway catheter in Example 2 of the present application; Figure 6 This is a schematic structural diagram of a multifunctional artificial airway catheter in Example 3 of the present application; Figure 7 This is a schematic structural diagram of a multifunctional artificial airway catheter in Example 4 of the present application; Explanation of the accompanying reference numerals: 1. Catheter; 11. Connecting interface; 12. Drainage port; 13. CO2 sampling port; 2. Air bag; 21. Sealing cuff; 22. Umbrella membrane; 23. Supporting sac body; 231. First sac segment; 232. Second sac segment; 24. Guide sac body; 3. Lead-out tube group; 31. Suction tube; 32. Sampling tube; 33. Inflation tube; 4. Pressure gauge; 5. Positive pressure interface; 6. Two-way valve. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 -Attached Figure 7 This application is described in further detail.

[0026] Example 1: Example 1 of the present application provides a multifunctional artificial airway catheter. Figure 1 and Figure 2 The multifunctional artificial airway catheter comprises a catheter 1, an air bag 2, an outlet tube group 3 and a manometer. Among them, a connecting interface 11 is fixed at one end of the catheter 1, and a drainage port 12 and a CO2 sampling port 13 are provided at the other end. The drainage port 12 is located on the side of the air bag 2 away from the connecting interface 11, and the CO2 sampling port 13 is located on the side of the air bag 2 close to the connecting interface 11. Specifically, a drainage port 12 is provided on each side of the catheter 1, and the two drainage ports 12 are arranged at intervals of 45-135° around the axis of the catheter 1. When the patient changes his position, there is always one drainage port 12 that can remain vertically downward to ensure smooth discharge of secretions, avoiding the problem of poor drainage caused by the improper position of a single centered drainage port 12. In this embodiment, the two drainage ports 12 are arranged at intervals of 45° around the axis of the catheter 1. One end of the catheter 1 with the drainage port 12 and the CO2 sampling port 13 is set to a tapered tip, and the tip is designed to be a smooth cone, which facilitates the smooth insertion of the catheter 1 into the patient's trachea. The connecting port 11 of the catheter 1 is provided to facilitate connection of the catheter 1 with other medical devices. In this embodiment, the catheter 1 is made of medical grade silicone material, which has good flexibility and biocompatibility, ensuring that the tracheal mucosa will not be damaged during insertion.

[0027] refer to Figure 3The airbag 2 includes a sealing cuff 21 and an umbrella membrane 22 fixed at one end thereof. The sealing cuff 21 is in the shape of a cone and is fixed and sheathed on the outside of the catheter 1. The umbrella membrane 22 is located on the side of the sealing cuff 21 close to the connecting interface 11 and is also sheathed on the outside of the catheter 1. In this embodiment, the umbrella membrane 22 is made of polyurethane material and can be quickly unfolded when inflated, fit the tracheal wall, and play a secondary sealing role; at this time, the flared opening of the umbrella membrane 22 is facing the direction of the connecting interface 11. The radius of the umbrella membrane 22 is greater than the radius of the trachea to ensure that the subglottic secretions can still be effectively blocked from entering the lungs when the patient chokes. The umbrella membrane 22 can be designed with two different thicknesses, with the part close to the sealing cuff 21 being thicker and the edge part being thinner to improve its flexibility and adaptability. In addition, in other embodiments, an antibacterial coating can be applied to the surface of the umbrella membrane 22 to reduce bacterial growth and further reduce the risk of infection.

[0028] refer to Figure 1 The outlet tube group 3 includes a suction tube 31, a sampling tube 32 and an inflation tube 33. One end of the suction tube 31 extends into the catheter 1 and is connected to two suction branches (not shown in the figure). Each suction branch is connected to a drainage port 12 at the end of the catheter 1 for extracting secretions in the trachea. There are two CO2 sampling ports 13 spaced apart around the axis of the catheter 1. One end of the sampling tube 32 extends into the catheter 1 and is connected to two detection branches (not shown in the figure). Each detection branch is connected to a CO2 sampling port 13 at the end of the catheter 1 for monitoring the carbon dioxide concentration in the exhaled gas; one end of the inflation tube 33 is connected to the sealing bag cuff 21 for inflating the airbag 2. In this embodiment, the suction tube 31, the sampling tube 32 and the inflation tube 33 are all made of transparent material to facilitate observation of the liquid flow. In other embodiments, in order to ensure the safety and reliability of the outlet tube group 3, a check valve can be installed at the connection of each pipe to prevent backflow.

[0029] refer to Figure 1 and Figure 4 The end of the inflation tube 33 away from the sealing cuff 21 is also connected to a positive pressure port 5. A pressure gauge 4 is specifically selected as the pressure measuring device. This pressure gauge 4 is connected to a section of the inflation tube 33. A two-way valve 6 is also installed on this section of the inflation tube 33, located between the pressure gauge 4 and the positive pressure port 5. The pressure gauge 4 is used to monitor the pressure within the sealing cuff 21. The positive pressure port 5 is used to connect to an air pump or other inflation device. When the pressure within the sealing cuff 21 falls below normal, the two-way valve 6 is opened, allowing air to be inflated into the sealing cuff 21 through the positive pressure port 5.

[0030] The implementation principle of a multifunctional artificial airway catheter in the embodiment of the present application is as follows: the catheter 1 not only has basic functions, but also can monitor CO2 concentration; the umbrella-shaped membrane 22 opens when the airbag 2 is inflated, fits against the tracheal wall, and has a secondary sealing effect. Especially when the patient chokes and coughs, it can still effectively prevent subglottic secretions from entering the lungs, significantly reducing the probability of ventilator-associated pneumonia. The lead-out tube group 3 integrates multiple functions for easy operation and monitoring; the pressure gauge ensures that the pressure of the sealing cuff 21 is always within a safe range, improving the patient's comfort and safety. This improved design not only improves the effectiveness of airway management, but also reduces the workload of medical staff to a certain extent and improves the efficiency of treatment.

[0031] Example 2: Reference Figure 5 This embodiment differs from Example 1 in that the airbag 2 further includes a support bladder 23, which communicates with the sealing cuff 21. The support bladders 23 are located on the side of the sealing cuff 21 near the umbrella membrane 22, and multiple support bladders 23 are spaced around the axis of the catheter 1. When the support bladders 23 expand, the distance between the support bladders 23 and the catheter 1 gradually increases toward the communication port 11, facilitating the deployment of the umbrella membrane 22 and driving the expansion of the umbrella membrane 22 toward the communication port 11.

[0032] One end of the support bladder 23 extends onto and connects to the parachute membrane 22, ensuring that the support bladder 23 can better support the parachute membrane 22 when inflated, making it more stable and secure when its outer edge adheres to the tracheal mucosa. This not only enhances the airway seal, but also effectively prevents airbag 2 from failing due to coughing and choking, reducing the risk of subglottic secretions migrating into the lungs.

[0033] Example 3: Reference Figure 6 The difference between this embodiment and embodiment 2 is that the support sac body 23 includes a first sac segment 231 and a second sac segment 232 that are interconnected. One end of the first sac segment 231 is fixed to the sealing sac cuff 21, and the second sac segment 232 is connected to the outer wall of the umbrella membrane 22. The inner diameter of the first sac segment 231 is larger than the inner diameter of the second sac segment 232, and the length of the first sac segment 231 is smaller than the length of the second sac segment 232. This allows the first sac segment 231 to quickly form a stable support and guiding effect when inflated, and the second sac segment 232 can better adapt to the morphological changes of the trachea, especially when the patient chokes and coughs, and can effectively open the umbrella sac, further providing a guiding effect for the deployment of the umbrella sac.

[0034] The introduction of support bladder 23 significantly improves the stability and sealing performance of airbag 2. The segmented design of support bladder 23 not only facilitates the uniform deployment of umbrella membrane 22 but also adapts to various morphological changes in the trachea, ensuring a strong seal even in complex situations. This innovative design significantly enhances the overall performance of airway tube 1 and provides enhanced patient safety.

[0035] Example 4: Reference Figure 7 This embodiment differs from Embodiment 2 in that, in this embodiment, the support bladder 23 is omitted. Instead, the airbag 2 includes a guide bladder 24 connected to one side of the sealing cuff 21. Guide bladder 24 is located on the side of the sealing cuff 21 near the umbrella membrane 22. Guide bladder 24 is annular and is positioned outside the catheter 1. When the airbag 2 is inflated, causing the guide bladder 24 to expand, the cross-sectional area of ​​the guide bladder 24 gradually decreases as it moves away from the sealing cuff 21.

[0036] The guide sac 24 provides guidance for the deployment of the parachute membrane 22, facilitating the expansion of the parachute membrane 22 toward the communication port 11 after the parachute membrane 22 is deployed. Furthermore, the guide sac 24 provides support for the parachute membrane 22 when inflated, facilitating the parachute membrane 22 to receive secretions and prevent them from entering the lungs.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multifunctional artificial airway catheter, characterized in that: include: A catheter (1), wherein one end of the catheter (1) is provided with a communication interface (11), and the other end is provided with a drainage port (12) and a CO2 sampling port (13); The airbag (2) comprises a sealing cuff (21) and an umbrella-shaped membrane (22) fixed to one end of the sealing cuff (21), wherein the sealing cuff (21) is fixed and sleeved outside the catheter (1), and the umbrella-shaped membrane (22) is located on a side of the sealing cuff (21) close to the communication interface (11), and the umbrella-shaped membrane (22) is also sleeved outside the catheter (1); An outlet tube assembly (3) includes a suction tube (31), a sampling tube (32), and an inflation tube (33), wherein one end of the suction tube (31) is in communication with the drainage port (12), one end of the sampling tube (32) is in communication with the CO2 sampling port (13), and one end of the inflation tube (33) is in communication with the sealing bag sleeve (21); A pressure gauge is in communication with the sealing bag (21) and is used to detect the pressure in the sealing bag (21).

2. A multifunctional artificial airway tube (1) according to claim 1, characterized in that: The drainage ports (12) are provided on both sides of the catheter (1).

3. A multifunctional artificial airway tube (1) according to claim 2, characterized in that: One end of the inflation tube (33) away from the sealing bag sleeve (21) is connected to a positive pressure interface (5), the pressure gauge is connected to the inflation tube (33), and a two-way valve (6) is also provided on the inflation tube (33), and the two-way valve (6) is located between the pressure gauge and the positive pressure interface (5).

4. A multifunctional artificial airway tube (1) according to claim 3, characterized in that: The pressure gauge is a pressure gauge (4).

5. The multifunctional artificial airway tube (1) according to claim 2, characterized in that: The two drainage ports (12) are arranged at intervals of 45-135° around the axis of the catheter (1).

6. A multifunctional artificial airway tube (1) according to claim 2, characterized in that: The airbag (2) further comprises a supporting sac (23), wherein the supporting sac (23) is in communication with the sealing sac sleeve (21); The supporting sac (23) is located on a side of the sealing sac (21) close to the umbrella membrane (22), and a plurality of supporting sacs (23) are arranged at intervals around the axis of the catheter (1); When the support sac (23) expands, the distance between the support sac (23) and the catheter (1) gradually increases in a direction approaching the communication interface (11).

7. A multifunctional artificial airway tube (1) according to claim 6, characterized in that: One end of the support capsule (23) extends onto the umbrella-shaped membrane (22) and is connected to the umbrella-shaped membrane (22).

8. The multifunctional artificial airway tube (1) according to claim 6, characterized in that: The supporting sac body (23) comprises a first sac segment (231) and a second sac segment (232) which are interconnected, one end of the first sac segment (231) is fixed to the sealing sac sleeve (21), and the second sac segment (232) is connected to the umbrella membrane (22); The inner diameter of the first sac segment (231) is greater than the inner diameter of the second sac segment (232), and the length of the first sac segment (231) is less than the length of the second sac segment (232).

9. The multifunctional artificial airway tube (1) according to claim 2, characterized in that: The airbag (2) further includes a guide sac (24), and the guide sac (24) is annular and is sleeved outside the catheter (1); The guide sac (24) is located on a side of the sealing sac (21) close to the umbrella membrane (22); when the guide sac (24) is expanded, the cross-sectional area of ​​the guide sac (24) gradually decreases in a direction away from the sealing sac (21).

Images