A nasal oxygen supply device

Abstract

The present application belongs to the technical field of medical devices, and particularly relates to a nasal oxygen supply device, which comprises a nasopharyngeal tube and an oxygen supply tube; one end of the oxygen supply tube away from the nasopharyngeal tube is connected with an oxygen supply device; an adjusting valve is arranged between the nasopharyngeal tube and the oxygen supply tube; the adjusting valve comprises an oxygen supply chamber, a connecting chamber, a control chamber, a control cavity, a pressure relief chamber, an elastic diaphragm and an adjusting rod; one end of the oxygen supply chamber is in communication with the oxygen supply tube, and the other end is provided with an oxygen supply hole; the oxygen supply chamber is in communication through the oxygen supply hole; one end of the connecting chamber away from the oxygen supply chamber is connected with the control chamber and the nasopharyngeal tube at the same time; the control chamber is connected with the pressure relief chamber; one end of the pressure relief chamber away from the control chamber is provided with a pressure relief port; the elastic diaphragm is arranged between the control cavity and the adjusting chamber; the elastic diaphragm is connected with the adjusting rod; the outer wall of the adjusting valve is provided with an adjusting knob and an adjusting spring; the adjusting knob is in threaded connection with the adjusting valve; one end of the adjusting spring is in abutment with the adjusting knob, and the other end is in abutment with the adjusting rod.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a nasal oxygen supply device. Background Technology

[0002] Nasal high-flow oxygen therapy is widely recommended in the fields of anesthesia, emergency medicine, respiratory wards and intensive care units because of its high flow rate, high concentration of oxygen, excellent non-breathing oxygenation effect and positive end-expiratory pressure effect. It can reduce anatomical dead space, increase end-expiratory volume, reduce the work of breathing, improve ventilation-perfusion ratio, and achieve controllable and precise oxygen delivery, as well as adequate warming and humidification.

[0003] Obese patients often present with an enlarged tongue and increased soft tissue in the pharynx, frequently accompanied by obstructive sleep apnea-hypopnea syndrome. During nighttime sleep, airway obstruction and apnea may occur, leading to hypoxemia and hypercapnia. In obese patients undergoing general anesthesia or sedation, the use of sedatives and analgesics can cause loss of consciousness, relaxation of the pharyngeal muscles and soft tissues, resulting in posterior displacement of the tongue and airway obstruction; the use of muscle relaxants can further exacerbate this condition. Posterior displacement of the tongue can also occur in non-obese patients. Furthermore, patients with decreased consciousness due to illness may also experience similar airway obstruction.

[0004] Current nasal cannula devices for high-flow nasal oxygen therapy only allow the nasal cannula to enter the nasal cavity. While providing continuous positive airway pressure, this cannot completely counteract partial or complete airway obstruction caused by anatomical structures such as the posterior displacement of the tongue, thus affecting oxygenation. Furthermore, another important reason is that the effectiveness of high-flow nasal oxygen therapy is related to the opening and closing of the oral cavity; high-flow oxygen may leak out through the mouth. Effective oxygenation can only be ensured when the oxygen delivery tube reaches the supraglottic region. Currently, nasopharyngeal airways can achieve supraglottic oxygen delivery. Newer nasopharyngeal airways available on the market can be used in conscious or semi-conscious patients, can be connected to wall-mounted oxygenation machines, and effectively reduce the incidence of hypoxemia compared to face mask ventilation.

[0005] However, simply connecting a nasopharyngeal airway to the nasal plug of a high-flow nasal oxygen therapy device only provides continuous oxygen supply to the patient's glottis. When the patient experiences posterior displacement of the tongue, it will block the throat, creating a closed space between the patient's trachea and lungs. The continuous injection of high-flow oxygen into this closed space by the nasopharyngeal airway will increase the air pressure inside this closed space, causing lung damage to the patient. Summary of the Invention

[0006] To address the aforementioned issues, this application discloses a nasal oxygen supply device.

[0007] A nasal oxygen supply device includes a nasopharyngeal tube and an oxygen supply tube; the end of the oxygen supply tube away from the nasopharyngeal tube is connected to the oxygen supply device.

[0008] A regulating valve is provided between the nasopharyngeal tube and the oxygen supply tube;

[0009] The regulating valve includes an oxygen supply chamber, a connecting chamber, a control chamber, a control cavity, a pressure relief chamber, an elastic diaphragm, and an adjusting rod; one end of the oxygen supply chamber is connected to an oxygen supply pipe, and the other end is provided with an oxygen supply hole; the oxygen supply chamber is connected to the connecting chamber through the oxygen supply hole; the end of the connecting chamber away from the oxygen supply chamber is connected to both the control chamber and the nasopharyngeal tube; the control chamber is connected to the pressure relief chamber; the end of the pressure relief chamber away from the control chamber is provided with a pressure relief port;

[0010] An elastic diaphragm is provided between the control chamber and the regulating chamber; the elastic diaphragm is connected to the regulating rod; an regulating knob and an regulating spring are provided on the outer wall of the regulating valve; the regulating knob is threadedly connected to the regulating valve; one end of the regulating spring abuts against the regulating knob, and the other end abuts against the regulating rod;

[0011] When the pressure inside the control chamber is greater than the pressure of the adjusting spring on the adjusting rod, the elastic diaphragm deforms, causing the adjusting rod to block the oxygen supply port and open the pressure relief port; when the pressure inside the control chamber is less than the pressure of the adjusting spring on the adjusting rod, the adjusting spring drives the adjusting rod to reset, causing the adjusting rod to block the pressure relief port and open the oxygen supply port.

[0012] Furthermore, the nasopharyngeal tube has a pressure measuring channel inside; the end of the nasopharyngeal tube away from the oxygen supply tube has a pressure measuring hole; the end of the nasopharyngeal tube facing the oxygen supply tube has a pressure measuring tube; one end of the pressure measuring tube is connected to the pressure measuring channel, and the other end is detachably connected to a pressure gauge; the pressure measuring channel is connected to the pressure measuring hole.

[0013] Furthermore, a buffer sheet is fixedly connected to the inner wall of the nasopharyngeal tube; the buffer sheet blocks the side of the oxygen supply port facing the oxygen supply tube.

[0014] Furthermore, the oxygen supply chamber is also provided with an exhaust port at the end away from the oxygen supply pipe;

[0015] When the pressure inside the control chamber is greater than the pressure of the adjusting spring on the adjusting rod, the elastic diaphragm deforms, causing the adjusting rod to block the oxygen supply port and open the pressure relief port and exhaust port; when the pressure inside the control chamber is less than the pressure of the adjusting spring on the adjusting rod, the adjusting spring drives the adjusting rod to reset, causing the adjusting rod to block the pressure relief port and exhaust port and open the oxygen supply port.

[0016] Furthermore, an extension tube is provided between the nasopharyngeal tube and the regulating valve; one end of the extension tube is connected to the nasopharyngeal tube; the other end is connected to the regulating valve.

[0017] The beneficial effects of this invention are as follows: A regulating valve is installed between the nasopharyngeal tube and the oxygen supply tube. The control chamber is connected to the patient's glottis through the nasopharyngeal tube. When the patient experiences posterior displacement of the tongue, the pressure inside the control chamber is the same as the gas pressure inside the patient's glottis. When the pressure inside the control chamber is greater than the pressure of the regulating spring on the regulating rod, i.e., when the gas pressure inside the patient's glottis is too high, the elastic diaphragm deforms, driving the regulating rod to move and compressing the regulating spring. This causes the regulating rod to block the oxygen supply port and open the pressure relief port, quickly expelling the gas inside the patient's glottis. When the pressure inside the control chamber is less than the pressure of the regulating spring on the regulating rod, i.e., when the gas pressure inside the patient's glottis is normal, the gas pressure can no longer drive the elastic diaphragm to deform. The regulating spring then drives the regulating rod to return to its original position, causing the regulating rod to block the pressure relief port and open the oxygen supply port, continuing to supply oxygen to the patient's glottis.

[0018] Automatic pressure relief mechanisms can effectively prevent pressure buildup caused by airway obstruction and reduce the risk of related complications.

[0019] The system automatically switches between oxygen supply and decompression modes based on the patient's actual physiological state (glottic pressure), without the need for external intervention.

[0020] The detachable connection between the nasopharyngeal tube, regulating valve, and oxygen supply tube facilitates quick installation and optimizes the convenience of clinical operation. Attached Figure Description

[0021] Figure 1 A front view of a nasal oxygen supply device for implementing the present invention;

[0022] Figure 2 A perspective view of a nasal oxygen supply device for implementing the present invention;

[0023] Figure 3 A cross-sectional view of a nasal oxygen supply device for implementing the present invention;

[0024] Figure 4 A front view of a regulating valve implementing the present invention;

[0025] Figure 5 A cross-sectional view of a regulating valve that implements the present invention;

[0026] Figure 6 A perspective view of an adjusting rod for implementing the present invention;

[0027] Figure 7 A front view of another nasal oxygen supply device that implements the present invention;

[0028] Figure 8 A perspective view of another nasal oxygen supply device for implementing the present invention;

[0029] Figure 9A perspective view of the third nasal oxygen supply device of the present invention in its stowed state;

[0030] Figure 10 for Figure 9 A magnified view of a portion of the image;

[0031] Figure 11 A perspective view of the third type of nasal oxygen supply device implementing the present invention in the oxygen supply state;

[0032] Figure 12 for Figure 11 A magnified view of a portion of the image;

[0033] In the diagram, 1. Nasopharyngeal tube; 2. Regulating valve; 3. Oxygen supply tube; 4. Pressure gauge; 5. Extension tube; 11. Pressure measuring tube; 12. Pressure measuring channel; 13. Pressure measuring hole; 14. Oxygen supply port; 15. Buffer plate; 21. First connection port; 22. Second connection port; 23. Adjusting knob; 24. Oxygen supply chamber; 25. Connection chamber; 26. Control chamber; 27. Elastic diaphragm; 28. Adjusting rod; 29. ​​Connecting tube; 201. Adjusting spring; 202. Control chamber; 203. Pressure relief chamber; 204. Through hole; 205. Sealing ring; 281. Connecting rod; 282. First piston; 283. Second piston; 284. Third piston; 285. Connecting piece. 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] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0036] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0037] In this document, it should be understood that the terms “center,” “length,” “upper,” “lower,” “front,” “rear,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0038] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Example 1

[0040] like Figure 1-6 The nasal oxygen supply device shown has the core function of automatically cutting off oxygen supply and opening pressure relief when the patient experiences conditions such as tongue retraction leading to an abnormal increase in glottic pressure, thereby ensuring the patient's respiratory safety.

[0041] Specifically, it includes a nasopharyngeal tube 1 and an oxygen supply tube 3; the end of the oxygen supply tube 3 away from the nasopharyngeal tube 1 is connected to the oxygen supply device.

[0042] A regulating valve 2 is provided between the nasopharyngeal tube 1 and the oxygen supply tube 3;

[0043] The regulating valve 2 includes an oxygen supply chamber 24, a connecting chamber 25, a control chamber 26, a control cavity 202, a pressure relief chamber 203, an elastic diaphragm 27, and an adjusting rod 28. One end of the oxygen supply chamber 24 is connected to the oxygen supply pipe 3, and the other end is provided with an oxygen supply hole. The oxygen supply chamber 24 is connected to the connecting chamber 25 through the oxygen supply hole. The end of the connecting chamber 25 away from the oxygen supply chamber 24 is connected to both the control chamber 26 and the nasopharyngeal tube 1. The control chamber 26 is connected to the pressure relief chamber 203. The end of the pressure relief chamber 203 away from the control chamber 26 is provided with a pressure relief port.

[0044] An elastic diaphragm 27 is provided between the control chamber 202 and the regulating chamber; the elastic diaphragm 27 is connected to the regulating rod 28; an regulating knob 23 and an regulating spring 201 are provided on the outer wall of the regulating valve 2; the regulating knob 23 is threadedly connected to the regulating valve 2; one end of the regulating spring 201 abuts against the regulating knob 23 and the other end abuts against the regulating rod 28;

[0045] The control chamber 26 is connected to the patient's glottis via the nasopharyngeal tube 1. When the patient experiences posterior displacement of the tongue, the pressure inside the control chamber 26 is the same as the gas pressure inside the patient's glottis. When the pressure inside the control chamber 26 is greater than the pressure of the adjusting spring 201 on the adjusting rod 28, i.e., when the gas pressure inside the patient's glottis is too high, the elastic diaphragm 27 deforms, causing the adjusting rod 28 to move and compress the adjusting spring 201. This causes the adjusting rod 28 to block the oxygen supply port and open the pressure relief port, quickly expelling excess gas from the glottis and reducing the pressure. When the pressure inside the control chamber 26 is less than the pressure of the adjusting spring 201 on the adjusting rod 28, i.e., when the gas pressure inside the patient's glottis is normal, the gas pressure can no longer drive the elastic diaphragm 27 to deform. The adjusting spring 201 then drives the adjusting rod 28 to return to its original position, causing the adjusting rod 28 to block the pressure relief port and open the oxygen supply port, continuing to supply oxygen to the patient's glottis.

[0046] like Figure 1-2 As shown, oxygen supply tube 3 is a high-flux nasal oxygen tube, with one end connected to a high-flux oxygen supply device and the other end having two oxygen supply ports. One oxygen supply port is detachably connected to the second connection port 22, and the other oxygen supply port is detachably connected to a sealing plug. The sealing plug is made of elastic polymer materials such as rubber, which can completely seal the oxygen supply port and prevent oxygen loss.

[0047] The oxygen provided by the high-flux oxygen supply equipment reaches the oxygen supply port through the oxygen supply pipe 3, then enters the oxygen supply chamber 24 through the second connection port 22, and finally enters the interior of the nasopharyngeal tube 1 through the first connection port 21, directly reaching the patient's trachea.

[0048] In some embodiments of this application, the end of the oxygen supply tube 3 furthest from the nasopharyngeal tube 1 is a spring tube; in use, the length of the oxygen supply tube 3 can be extended by straightening the spring tube, or the oxygen supply tube 3 can be fixed to the outside of other objects by winding. This facilitates flexible tube placement and fixation in clinical practice, reducing the restriction of the tube on the patient's movement.

[0049] Specifically, the nasopharyngeal tube 1 is an arc-shaped tubular structure to facilitate insertion through the nose.

[0050] like Figure 3 As shown, the end of the nasopharyngeal tube 1 away from the oxygen supply tube 3 is also provided with an oxygen supply port 14, through which oxygen leaves the nasopharyngeal tube 1 and enters the patient's glottis.

[0051] Preferably, multiple oxygen supply ports 14 are provided, and the multiple oxygen supply ports 14 are arranged in a circle with the axis of the nasopharyngeal tube 1 as the center.

[0052] like Figure 3As shown, the nasopharyngeal tube 1 has a pressure measuring channel 12 inside; a pressure measuring hole 13 is provided at the end of the nasopharyngeal tube 1 away from the oxygen supply tube 3; a pressure measuring tube 11 is provided at the end of the nasopharyngeal tube 1 facing the oxygen supply tube 3; one end of the pressure measuring tube 11 is connected to the pressure measuring channel 12, and the other end is detachably connected to a pressure gauge 4; the pressure measuring channel 12 is connected to the pressure measuring hole 13. During oxygen supply, the gas inside the patient's glottis enters the pressure measuring channel 12 through the pressure measuring hole 13, and then reaches the pressure gauge 4 along the pressure measuring tube 11, so that the pressure gauge 4 can measure the gas pressure at the patient's glottis.

[0053] like Figure 3-5 As shown, the control chamber 202 is located between the connecting chamber 25 and the pressure relief chamber 203.

[0054] When the pressure inside the control chamber 26 is greater than the pressure of the adjusting spring 201 on the adjusting rod 28, the elastic diaphragm 27 deforms, driving the adjusting rod 28 to move towards the pressure relief chamber 203, while simultaneously compressing the adjusting spring 201. This causes the adjusting rod 28 to block the oxygen supply port and open the pressure relief port, quickly expelling the gas inside the patient's glottis. When the pressure inside the control chamber 26 is less than the pressure of the adjusting spring 201 on the adjusting rod 28, i.e., when the gas pressure inside the patient's glottis is normal, the gas pressure can no longer drive the elastic diaphragm 27 to deform. The adjusting spring 201 then drives the adjusting rod 28 to reset, causing the adjusting rod 28 to block the pressure relief port and open the oxygen supply port, continuing to supply oxygen to the patient's glottis.

[0055] Specifically, the elastic diaphragm 27 and the adjusting spring 201 are located on both sides of the pressure relief chamber 203, so that the elastic diaphragm 27 and the adjusting spring 201 can drive the adjusting rod 28 to move in different directions.

[0056] Preferably, the control chamber 202 and the pressure relief chamber 203 are separated by a partition; the adjusting rod 28 passes through the partition; the partition has a sealing ring 205 inside; the sealing ring 205 is fitted onto the adjusting rod 28. The purpose of the sealing ring 205 is to enhance airtightness and prevent gas inside the pressure relief chamber 203 from entering the control chamber 202 through the gap between the adjusting rod 28 and the partition, thus ensuring that the gas pressure inside the control chamber 26 is not equal to the gas pressure inside the control chamber 202.

[0057] Furthermore, such as Figure 5 As shown, the side wall of the control chamber 202 is provided with a through hole 204; the control chamber 202 is connected to the outside through the through hole 204 to prevent the gas inside the control chamber 202 from hindering the gas inside the control chamber 26 from pushing the elastic diaphragm 27.

[0058] like Figure 5-6As shown, the oxygen supply chamber 24 is also provided with an exhaust port at the end away from the oxygen supply pipe 3; when the pressure inside the control chamber 26 is greater than the pressure of the adjusting spring 201 on the adjusting rod 28, the elastic diaphragm 27 deforms, causing the adjusting rod 28 to block the oxygen supply port and open the pressure relief port and the exhaust port; when the pressure inside the control chamber 26 is less than the pressure of the adjusting spring 201 on the adjusting rod 28, the adjusting spring 201 drives the adjusting rod 28 to reset, causing the adjusting rod 28 to block the pressure relief port and the exhaust port and open the oxygen supply port.

[0059] When the gas pressure inside the patient's glottis is too high, the regulating rod 28 blocks the oxygen supply port and opens the pressure relief port, preventing high-flow oxygen from the oxygen supply tube 3 from entering the patient's trachea and rapidly expelling the gas from the patient's glottis. At this time, the regulating rod 28 opens the vent, allowing the gas inside the oxygen supply chamber 24 to be discharged through the vent, preventing the oxygen supply chamber 24 from rupturing or the oxygen supply equipment from being damaged due to a rapid increase in gas pressure inside the oxygen supply chamber 24.

[0060] like Figure 5-6 As shown, a connecting pipe 29 is provided on the outer wall of the regulating valve 2; one end of the connecting pipe 29 is fixedly connected to the regulating valve 2, and the other end is threadedly connected to the adjusting knob 23; the adjusting spring 201 is located inside the connecting pipe 29. Rotating the adjusting knob 23 compresses the length of the adjusting spring 201, thereby changing the pressure of the adjusting spring 201 on the adjusting rod 28, and thus changing the pressure relief of the regulating valve 2.

[0061] Preferably, the outer wall of the connecting tube 29 is provided with graduations so that the pressure value of the adjusting spring 201 on the adjusting rod 28 can be directly observed.

[0062] like Figure 5-6 As shown, the adjusting rod 28 includes a connecting rod 281, a first piston 282, a second piston 283, a third piston 284, and a connecting member 285; the first piston 282, the second piston 283, and the third piston 284 are sequentially mounted on the connecting rod 281; the connecting rod 281 is connected to the elastic diaphragm 27 through the connecting member 285.

[0063] Preferably, the first piston 282 is detachably connected to the exhaust port; the second piston 283 is detachably connected to the oxygen supply port; and the third piston 284 is detachably connected to the pressure relief port.

[0064] Specifically, the connector 285 is located between the second piston 283 and the third piston 284.

[0065] Furthermore, the connector 285 has a regular disc-shaped structure, which increases the contact area between the connector 285 and the elastic diaphragm 27, reduces the pressure between the connector 285 and the elastic diaphragm 27, and prevents damage to the elastic diaphragm 27.

[0066] Preferably, the first piston 282 is conical to facilitate entry into the interior of the exhaust port. The second piston 283 is conical to facilitate entry into the interior of the oxygen supply port. The third piston 284 is conical to facilitate entry into the interior of the pressure relief port.

[0067] Example 2

[0068] like Figure 7-8 As shown, the difference between this embodiment and Embodiment 1 is that:

[0069] An extension tube 5 is provided between the nasopharyngeal tube 1 and the regulating valve 2; one end of the extension tube 5 is connected to the nasopharyngeal tube 1; the other end is connected to the regulating valve 2.

[0070] The main function of the extension tube 5 is to increase the distance between the regulating valve 2 and the patient's nose. This allows the regulating valve 2 to be placed on the bed, beside the pillow, or in other suitable locations, thus avoiding potential pressure on the patient's face and improving comfort during long-term wear. At the same time, the longer tube also makes it easier for clinical staff to organize and secure it, keeping the bed unit tidy.

[0071] Furthermore, the length of the extension tube 5 is greater than the length of the nasopharyngeal tube 1.

[0072] Preferably, the inner wall of the extension tube 5 is provided with reinforcing wires. This design can significantly enhance the pressure resistance of the tube, prevent airway blockage or oxygen supply interruption caused by patient pressure, tube bending, etc., and ensure continuous and stable oxygen delivery.

[0073] Preferably, the extension tube 5 can provide a variety of standard lengths (e.g., 30cm, 50cm, 100cm, etc.) according to different clinical scenarios (such as bed transport, MRI examination room, etc.), and its maximum effective length is clearly defined to avoid oxygen pressure loss due to excessive tube length.

[0074] In some embodiments of this application, a standard pressure measurement interface or three-way valve is added to the extension tube 5 to connect a pressure monitoring device and monitor changes in airway pressure in real time.

[0075] Example 3

[0076] like Figure 9-12 As shown, the difference between this embodiment and embodiments 1 and 2 is that:

[0077] A buffer sheet 15 is fixedly connected to the inner wall of the nasopharyngeal tube 1; the buffer sheet 15 covers the side of the oxygen supply port 14 facing the oxygen supply tube 3. This completely avoids scratching or obstruction of the nasal and pharyngeal tissues during insertion. When oxygen supply begins, the high flow of oxygen drives the buffer sheet 15 to deform, causing it to extend outward from the corresponding oxygen supply port 14. This effectively disperses the oxygen flow, changing it from a concentrated jet to a gentle diffusion, thereby significantly reducing direct irritation to the patient's glottis and tracheal mucosa. The buffer sheet 15 achieves an intelligent balance between functionality (airflow buffering) and safety (smooth tube insertion). It automatically responds to airflow changes through a simple mechanical structure, requiring no external intervention, cleverly improving patient comfort.

[0078] Specifically, the buffer plate 15 corresponds one-to-one with the oxygen supply port 14. Each oxygen supply port 14 is equipped with a buffer plate 15.

[0079] Preferably, the buffer sheet 15 is made of an elastic polymer material, which allows the buffer sheet 15 to deform under the action of high flow rate oxygen. The material of the buffer sheet 15 can be medical-grade silicone or polyurethane. These materials not only have excellent biocompatibility and flexibility, but also have a long fatigue life and can withstand repeated airflow impact.

[0080] In some embodiments of this application, the buffer sheet 15 may be designed as a valve or a guide vane. For example, a thin sheet structure similar to a one-way valve may be used, which allows it to open more smoothly under the action of airflow and return to its original position quickly when the airflow stops.

[0081] The above are merely specific embodiments of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A nasal oxygen supply device, comprising a nasopharyngeal tube and an oxygen supply tube; the end of the oxygen supply tube away from the nasopharyngeal tube is connected to the oxygen supply device, characterized in that, A regulating valve is provided between the nasopharyngeal tube and the oxygen supply tube; The regulating valve includes an oxygen supply chamber, a connecting chamber, a control chamber, a control cavity, a pressure relief chamber, an elastic diaphragm, and an adjusting rod; one end of the oxygen supply chamber is connected to an oxygen supply pipe, and the other end is provided with an oxygen supply hole; the oxygen supply chamber is connected to the connecting chamber through the oxygen supply hole; the end of the connecting chamber away from the oxygen supply chamber is connected to both the control chamber and the nasopharyngeal tube; the control chamber is connected to the pressure relief chamber; the end of the pressure relief chamber away from the control chamber is provided with a pressure relief port; The control chamber is located between the connecting chamber and the pressure relief chamber; An elastic diaphragm is provided between the control chamber and the regulating chamber; the elastic diaphragm is connected to the regulating rod; an regulating knob and an regulating spring are provided on the outer wall of the regulating valve; the regulating knob is threadedly connected to the regulating valve; one end of the regulating spring abuts against the regulating knob, and the other end abuts against the regulating rod; When the pressure inside the control chamber is greater than the pressure of the adjusting spring on the adjusting rod, the elastic diaphragm deforms, causing the adjusting rod to block the oxygen supply port and open the pressure relief port; when the pressure inside the control chamber is less than the pressure of the adjusting spring on the adjusting rod, the adjusting spring drives the adjusting rod to reset, causing the adjusting rod to block the pressure relief port and open the oxygen supply port.

2. The nasal oxygen supply device according to claim 1, characterized in that, The control cavity has a through hole on its side wall; the control cavity is connected to the outside through the through hole.

3. A nasal oxygen supply device according to claim 2, characterized in that, The regulating valve has a connecting pipe on its outer wall; one end of the connecting pipe is fixedly connected to the regulating valve, and the other end is threadedly connected to the regulating knob; the regulating spring is located inside the connecting pipe.

4. A nasal oxygen supply device according to claim 3, characterized in that, The outer wall of the connecting pipe is marked with graduations.

5. A nasal oxygen supply device according to claim 1, characterized in that, The nasopharyngeal tube has a pressure measuring channel inside; the end of the nasopharyngeal tube away from the oxygen supply tube has a pressure measuring hole; the end of the nasopharyngeal tube facing the oxygen supply tube has a pressure measuring tube; one end of the pressure measuring tube is connected to the pressure measuring channel, and the other end is detachably connected to a pressure gauge; the pressure measuring channel is connected to the pressure measuring hole.

6. A nasal oxygen supply device according to claim 5, characterized in that, The end of the nasopharyngeal tube furthest from the oxygen supply tube is also provided with an oxygen supply port.

7. A nasal oxygen supply device according to claim 6, characterized in that, The oxygen supply ports are arranged in a circle with the axis of the nasopharyngeal tube as the center.

8. A nasal oxygen supply device according to claim 6, characterized in that, A buffer sheet is fixedly connected to the inner wall of the nasopharyngeal tube; the buffer sheet blocks the side of the oxygen supply port facing the oxygen supply tube.

9. A nasal oxygen supply device according to claim 8, characterized in that, The buffer sheet is made of elastic polymer material.

10. A nasal oxygen supply device according to claim 8, characterized in that, Each buffer plate corresponds to an oxygen supply port.

11. A nasal oxygen supply device according to claim 10, characterized in that, The elastic diaphragm and the adjusting spring are located on both sides of the pressure relief chamber.

12. A nasal oxygen supply device according to claim 10, characterized in that, The control chamber and the pressure relief chamber are separated by a partition; the adjusting rod passes through the partition; the partition has a sealing ring inside; the sealing ring is fitted onto the adjusting rod.

13. A nasal oxygen supply device according to claim 1, characterized in that, The oxygen supply chamber is also provided with an exhaust port at the end away from the oxygen supply pipe; When the pressure inside the control chamber is greater than the pressure of the adjusting spring on the adjusting rod, the elastic diaphragm deforms, causing the adjusting rod to block the oxygen supply port and open the pressure relief port and exhaust port; when the pressure inside the control chamber is less than the pressure of the adjusting spring on the adjusting rod, the adjusting spring drives the adjusting rod to reset, causing the adjusting rod to block the pressure relief port and exhaust port and open the oxygen supply port.

14. A nasal oxygen supply device according to claim 13, characterized in that, The adjusting rod includes a connecting rod, a first piston, a second piston, a third piston, and a connecting member; the first piston, the second piston, and the third piston are sequentially mounted on the connecting rod; the connecting rod is connected to the elastic diaphragm through the connecting member.

15. A nasal oxygen supply device according to claim 14, characterized in that, The first piston is detachably connected to the exhaust port; the second piston is detachably connected to the oxygen supply port; and the third piston is detachably connected to the pressure relief port.

16. A nasal oxygen supply device according to claim 14, characterized in that, The connector is located between the second piston and the third piston.

17. A nasal oxygen supply device according to claim 14, characterized in that, The first piston is conical.

18. A nasal oxygen supply device according to claim 14, characterized in that, The second piston is conical.

19. A nasal oxygen supply device according to claim 14, characterized in that, The third piston is conical.

20. A nasal oxygen supply device according to claim 1, characterized in that, The end of the oxygen supply tube furthest from the nasopharyngeal tube is a spring tube.

21. A nasal oxygen supply device according to claim 20, characterized in that, The nasopharyngeal tube is an arc-shaped tubular structure.

22. A nasal oxygen supply device according to claim 1, characterized in that, An extension tube is provided between the nasopharyngeal tube and the regulating valve; one end of the extension tube is connected to the nasopharyngeal tube; the other end is connected to the regulating valve.

23. A nasal oxygen supply device according to claim 22, characterized in that, The inner wall of the extension tube is provided with reinforcing wires.

24. A nasal oxygen supply device according to claim 23, characterized in that, The length of the extension tube is greater than the length of the nasopharyngeal tube.

Images