Nasal oxygen cannula

Abstract

The utility model discloses a nasal oxygen tube relates to medical instruments and physical treatment use equipment structure design technical field. The nasal oxygen tube, including: air outlet pipe, oxygen pipe, air inlet pipe, support air bag, breath holding air bag and sealed air bag, oxygen pipe one end fixedly connected in the air outlet pipe, oxygen pipe other end fixedly connected first air inlet device, and support air bag and breath holding air bag are arranged on the air outlet pipe respectively, and support air bag and breath holding air bag are fixedly connected on the outer wall of oxygen pipe one end respectively, and sealed air bag is located breath holding air bag upside, and sealed air bag is communicated with breath holding air bag, support air bag is fixedly connected with second air inlet device through air inlet pipe, and breath holding air bag is fixedly connected with third air inlet device through air inlet pipe, the air outlet pipe is inserted into the nasal cavity, and support air bag is inflated and props up the support nasal cavity, and breath holding air bag and sealed air bag are inflated and prop up and block the nasal cavity, make the patient hold breath, sealed air bag is inflated and props up and prevents the oxygen pipe intake, and sealed air bag deflates and makes the oxygen pipe gas circulation.

Description

Technical Field

[0001] This utility model relates to the field of structural design technology of medical devices and physical therapy equipment, and in particular to a nasal oxygen tube. Background Technology

[0002] Cardiac MRI is a non-invasive, high-resolution imaging technique used to assess cardiac structure, function, blood flow, and tissue characteristics. During the examination, the patient needs to hold their breath multiple times (approximately 10-15 seconds each time) to reduce respiratory artifacts.

[0003] The current nasal oxygen tube requires manually pinching the patient's nose before the breath-holding test, which is cumbersome and wastes manpower. Secondly, the current nasal tube is a short tube, and due to its material, the traditional nasal oxygen tube has a certain degree of rigidity. If the patient's nose is pinched inside the nasal cavity, it can easily cause pain, exacerbate the patient's discomfort, and affect the test results.

[0004] It is evident that existing nasal oxygen tubes are cumbersome to operate, inconvenient to use, and can cause pain when the patient's nose is manually pinched, thus affecting the test results. Utility Model Content

[0005] In view of this, the main purpose of this utility model is to provide a nasal oxygen tube that can solve the problems of cumbersome operation and pain caused by manually pinching the patient's nose when using the nasal oxygen tube, which affects the detection effect.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] The nasal oxygen cannula includes: an outlet tube, an oxygen tube, an inlet tube, a support airbag, a breath-holding airbag, and a sealing airbag. One end of the oxygen tube is fixedly connected to the outlet tube, and the other end of the oxygen tube is fixedly connected to a first inlet device. The support airbag and the breath-holding airbag are respectively disposed on the outlet tube and are respectively fixedly connected to the outer wall of one end of the oxygen tube. The sealing airbag is disposed on the upper side of the breath-holding airbag and is in communication with the breath-holding airbag.

[0008] In a preferred embodiment, the support airbag is fixedly connected to the second air intake device through the air intake pipe, and the air-holding airbag is fixedly connected to the third air intake device through the air intake pipe.

[0009] In a preferred embodiment, the air outlet tube is inserted into the nasal cavity, the support airbag is inflated to support the nasal cavity, and the breath-holding airbag and the sealing airbag are inflated to block the nasal cavity, causing the patient to hold their breath.

[0010] In a preferred embodiment, the sealing airbag inflates to prevent air from entering the oxygen tube, and the sealing airbag deflates to allow gas to flow through the oxygen tube.

[0011] In a preferred embodiment, the air outlet pipe includes: a head, an opening, and a connecting portion, wherein the head and the connecting portion are integrally formed at both ends of the opening portion;

[0012] In a preferred embodiment, an air inlet is provided at the upper end of the head, and the sealing airbag is detachably connected inside the head;

[0013] In a preferred embodiment, the opening is provided with a plurality of airbag slots, and the supporting airbag and the air-holding airbag are respectively disposed in the airbag slots.

[0014] In a preferred embodiment, the connecting part has a connecting hole, and the oxygen pipe and the air inlet pipe are respectively fixedly connected to the connecting hole.

[0015] In a preferred embodiment, the support airbag and the breath-hold airbag are arranged circumferentially along the oxygen tube, and the support airbag and the breath-hold airbag are fixedly connected to the outer wall of the oxygen tube by a connector.

[0016] In a preferred embodiment, the support airbag and the air-holding airbag are respectively fixedly connected to one end of the two air intake pipes, and the other end of the two air intake pipes are respectively fixedly connected to the second air intake device and the third air intake device.

[0017] In a preferred embodiment, the connector has multiple slots, and the support airbag and the air-holding airbag are respectively fixedly connected with buckles, and the support airbag and the air-holding airbag are respectively engaged with the connector.

[0018] In a preferred embodiment, the connector is fixedly connected to the oxygen tube.

[0019] In a preferred embodiment, the sealing airbag and the air-holding airbag are integrally formed, and the elastic element is fixedly connected to the head. The sealing airbag is detachably connected to the head through the elastic element, and the sealing airbag blocks the air inlet when it is inflated.

[0020] In a preferred embodiment, the air intake pipe includes: a first air intake pipe and a second connecting air intake pipe, wherein the first air intake pipe and the second air intake pipe are respectively fixedly connected to the connecting hole;

[0021] In a preferred embodiment, one end of the first air intake pipe is fixedly connected to the support airbag, and the first air intake pipe is in communication with the support airbag.

[0022] In a preferred embodiment, one end of the second air intake pipe is fixedly connected to the air-holding bladder, and the second air intake pipe is in communication with the air-holding bladder.

[0023] In a preferred embodiment, the first air intake pipe is fixedly connected to the second air intake device, and the second air intake pipe is fixedly connected to the third air intake device.

[0024] In a preferred embodiment, a large conductive component is provided between the oxygen pipe and the first air intake device, and the oxygen pipe is disconnected in the middle and fixedly connected by the large conductive component.

[0025] In a preferred embodiment, a small conductive component is provided between the first air intake pipe and the second air intake device, and the first air intake pipe is disconnected in the middle and fixedly connected by the small conductive component.

[0026] In a preferred embodiment, a small conductive element is provided between the second air intake pipe and the third air intake device, and the second air intake pipe is disconnected in the middle and fixedly connected by the small conductive element.

[0027] In a preferred embodiment, the sidewall of the large conductive component is fixedly connected to one side of the first one-way valve, and an airbag is detachably connected to the other side of the first one-way valve.

[0028] In a preferred embodiment, a second one-way valve is provided between the small conductive element and the second air intake device, and the first air intake pipe is disconnected in the middle and fixedly connected through the second one-way valve.

[0029] In a preferred embodiment, a vent slot is provided on one side of the second one-way valve, and a connecting protrusion is provided below the vent slot. The connecting protrusion is integrally formed with the second one-way valve.

[0030] In a preferred embodiment, a flow groove is provided at one end of the first air intake pipe near the connection of the air vent, and the connecting protrusion is slidably connected to the flow groove.

[0031] In a preferred embodiment, there are two air outlet pipes, and the two air outlet pipes are fixedly connected through the oxygen pipe, the air inlet pipe, the first air inlet device, the second air inlet device, and the third air inlet device, respectively.

[0032] The nasal oxygen cannula of this utility model has the following beneficial effects:

[0033] The nasal oxygen cannula includes: an outlet tube, an oxygen tube, an inlet tube, a support cuff, a breath-holding cuff, and a sealing cuff. One end of the oxygen tube is fixedly connected to the outlet tube, and the other end is fixedly connected to a first inlet device. The support cuff and the breath-holding cuff are respectively located on the outlet tube and are fixedly connected to the outer wall of one end of the oxygen tube. The sealing cuff is located above the breath-holding cuff and communicates with it. The support cuff is fixedly connected to a second inlet device through the inlet tube, and the breath-holding cuff is fixedly connected to a third inlet device through the inlet tube. When the outlet tube is inserted into the nasal cavity, the support cuff inflates to support the nasal cavity, and the breath-holding cuff and the sealing cuff inflat to block the nasal cavity, causing the patient to hold their breath. The sealing cuff inflates to prevent air from entering the oxygen tube, and the sealing cuff deflates to allow air to flow through the oxygen tube.

[0034] This nasal oxygen cannula delivers gas through an oxygen tube. The inflated cuff supports and fixes the outlet tube within the nasal cavity, effectively blocking the patient's nasal passages and forcing them into a breath-holding state, meeting the testing criteria. Correspondingly, when the cuff is inflated, a closed cavity is formed within the outlet tube, preventing further gas flow and enhancing the breath-holding effect, thus improving testing efficiency and convenience. Furthermore, the cuff is made of flexible material, preventing pain and discomfort to the patient's nasal cavity. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a nasal oxygen cannula according to one embodiment of the present disclosure;

[0037] Figure 2 This is a schematic diagram of the air outlet pipe and airbag according to one embodiment of the present disclosure;

[0038] Figure 3 This is a schematic diagram of the structure of an air outlet pipe according to one embodiment of the present disclosure;

[0039] Figure 4 A schematic diagram of the air outlet pipe from another angle according to one embodiment of the present disclosure;

[0040] Figure 5 A schematic diagram of the connection between an airbag and an oxygen tube according to one embodiment of the present disclosure;

[0041] Figure 6A cross-sectional view of the connection between an airbag and an oxygen tube according to one embodiment of the present disclosure;

[0042] Figure 7 A schematic diagram of the structure of a connector according to an embodiment of the present disclosure;

[0043] Figure 8 A cross-sectional view of a sealed airbag in a deflated state according to an embodiment of this disclosure;

[0044] Figure 9 A cross-sectional view of a sealed airbag in an inflated state according to one embodiment of the present disclosure;

[0045] Figure 10 A schematic diagram of the structure of a second check valve according to an embodiment of the present disclosure;

[0046] Figure 11 A cross-sectional view of a second check valve according to one embodiment of the present disclosure;

[0047] Figure 12 A schematic diagram of the structure of the second one-way valve and the air inlet pipe in a venting state according to an embodiment of the present disclosure;

[0048] Figure 13 A schematic diagram of the structure of the second one-way valve and the air intake pipe in a sealed state according to an embodiment of the present disclosure;

[0049] Figure 14 A schematic diagram of the structure of a large conductive element according to an embodiment of this disclosure;

[0050] Figure 15 A schematic diagram of the structure of a small conductive element according to an embodiment of this disclosure.

[0051] [Explanation of Key Component Symbols]

[0052] 1. Air outlet pipe;

[0053] 11. Head; 12. Opening; 13. Connecting part;

[0054] 111. Air intake port; 121. Airbag slot; 131. Connecting hole;

[0055] 2. Oxygen tubing;

[0056] 3. Air intake pipe;

[0057] 31. First air intake pipe; 32. Second air intake pipe; 311. Flow channel;

[0058] 41. Support airbag; 42. Breath-holding airbag; 43. Sealing airbag;

[0059] 51. First air intake device; 52. Second air intake device; 53. Third air intake device;

[0060] 6. Connector; 61. Slot;

[0061] 7. Elastic components;

[0062] 8. Large conductive components; 9. Small conductive components;

[0063] 10. Airbags;

[0064] 01. First check valve; 02. Second check valve; 021. Vent slot; 022. Connecting protrusion;

[0065] 03. Buckle. Detailed Implementation

[0066] The following detailed description of a nasal oxygen tube according to the present invention, in conjunction with the accompanying drawings and embodiments thereof, will be provided in further detail.

[0067] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] according to Figures 1-15 As shown, the nasal oxygen cannula includes: an outlet tube 1 for insertion into the patient's nasal cavity, an oxygen tube 2 for delivering oxygen, an inlet tube 3 for inflating and deflating the cuff, a support cuff 41 for supporting the nasal cavity, a breath-hold cuff 42 and a sealing cuff 43 for blocking, and an air intake device for delivering gas to the oxygen tube 2 and the cuff 4. One end of the oxygen tube 2 extends into the interior of the outlet tube 1 from the lower connecting part 13 and is fixedly connected to the outlet tube 1 through the connecting hole 131. Correspondingly, the other end of the oxygen tube 2 is fixedly connected to a first air intake device 51 to continuously deliver oxygen to the oxygen tube 2. In this specific embodiment, the first air intake device 51 connected to the oxygen tube 2 is an oxygen generator. In order to fix the support airbag 41, the breath-holding airbag 42 and the sealing airbag 43 in the nasal cavity, the support airbag 41, the breath-holding airbag 42 and the sealing airbag 43 are provided on one end of the air outlet tube 1, and the support airbag 41, the breath-holding airbag 42 and the sealing airbag 43 are respectively connected to the outer wall of one end of the oxygen tube 2 and the inside of the head 11 of the air outlet tube 1.

[0072] To enable the inflation and deflation of the support airbag 41, the breath-holding airbag 42, and the sealing airbag 43, the support airbag 41 is fixedly connected to the second air intake device 52 via the air intake tube 3, and the breath-holding airbag 42 is fixedly connected to the third air intake device 53 via the air intake tube 3. In this specific embodiment, the support airbag 41 and the breath-holding airbag 43 are each connected to two air intake tubes. The support airbag 41 is connected to one side of the first air intake tube 31, and the other side of the first air intake tube 31 is fixedly connected to the second air intake device 52, which is a syringe. The breath-holding airbag 42 is connected to one side of the second air intake tube 32, and the other side of the second air intake tube 32 is fixedly connected to the third air intake device 53, which is a balloon. When the outlet tube 1 is inserted into the nasal cavity, the support airbag 41 inflates to support the outlet tube 1 in the nasal cavity, and the breath-holding airbag 42 and the sealing airbag 43 inflate to block the nasal cavity, causing the patient to hold their breath. The sealing cuff 43 inflates to prevent air from entering the oxygen tube 2, and deflates to allow air to flow through the oxygen tube 2. Further explanation of the balloon follows: During testing, the balloon is placed in the patient's hand. When breath-holding is required, the patient squeezes the balloon, compressing it and directing air through the inlet tube 3 into the breath-holding cuff 42. This causes the breath-holding cuff to inflate and close the nasal cavity, while simultaneously creating a closed cavity within the outlet tube 1, blocking the outlet of the oxygen tube 2 and causing the patient to reach a state of breath-holding.

[0073] In order to secure each airbag, the air outlet pipe 1 includes: a head 11 connected to one side of the sealing airbag 43, an opening 12 for the airbag 41 and the air-holding airbag 42 to inflate, and a connecting part 13 for securing the oxygen pipe 2 and the air inlet pipe 3. In order to improve the connection strength, the head 11 and the connecting part 13 are integrally formed at both ends of the opening 12.

[0074] To ensure a continuous oxygen supply to the oxygen tubing 2 within each of the air bags, an air inlet 111 is provided at the upper end of the head 11. The air inlet 111 allows for a continuous oxygen supply to the oxygen tubing 2, including the supporting air bag 41 and the breath-holding air bag 42, when inflated. To enable the patient to hold their breath, a detachable sealing air bag 43 is connected to one side of the head 11. Specifically, an elastic element 7 is fixed to the inner wall of the head 11. The sealing air bag 43 is inserted into and fixed within the elastic element 7. When the sealing air bag 43 is inflated, the elastic element 7 also elastically deforms, stretching along with the sealing air bag 43 and blocking the air inlet 111, preventing the oxygen tubing 2 from continuously supplying oxygen. After the sealing air bag 43 deflates, the elastic element 7 quickly drives the sealing air bag 43 to deflate, opening the air inlet 111.

[0075] To allow the support airbag 41 and breath-holding airbag 42, which are fixed to the oxygen tube 2, to expand out of the outlet tube 1, the opening 12 has multiple airbag slots 121, within which the support airbag 41 and breath-holding airbag 42 are positioned. Thus, when the support airbag 41 and breath-holding airbag 42 are inflated, they expand out of the airbag slots 121, thereby supporting and sealing the nasal cavity. When the support airbag 41 and breath-holding airbag 42 deflate, they return to the airbag slots 121, allowing airflow into the nasal cavity.

[0076] Of course, in order to fix the oxygen tube 2 and the air inlet tube 3 inside the air outlet tube 1, the air inlet tube 3 is connected to the air bag 4 so that the air bag 41 and the breath-holding air bag 42 can be inflated. The connecting part 13 is provided with a connecting hole 131, and the oxygen tube 2 and the air inlet tube 3 are respectively fixedly connected to the connecting hole 131. In this specific embodiment, the air outlet tube 1 is a transparent flexible tube, and the connecting part 13 is divided into upper and lower halves by a central groove. The connecting part 13 fixes the oxygen tube 2 and the air inlet tube 3 by central compression. The outer wall of the connecting part 13 is provided with a protrusion around the perimeter for fixing with an elastic rubber ring or a plastic ring.

[0077] To conform to the shape of the nasal cavity for better occlusion and support, the support airbag 41 and the breath-holding airbag 42 are arranged circumferentially along the oxygen tube 2. To secure them to the oxygen tube 2, the support airbag 41 and the breath-holding airbag 42 are fixedly connected to the outer wall of the oxygen tube 2 via connector 6.

[0078] To enable the support airbag 41 and the breath-holding airbag 42 to inflate within the nasal cavity, the support airbag 41 and the breath-holding airbag 42 are respectively fixedly connected to one end of two air inlet tubes 3. In this specific embodiment, the support airbag 41 and the breath-holding airbag 42 are symmetrically arranged on the oxygen tube 2, and each of the support airbag 41 and the breath-holding airbag 42 is connected to an air inlet tube 3 to increase the gas supply. The other ends of the two air inlet tubes 3 are respectively fixedly connected to a second air inlet device 52 and a third air inlet device 53.

[0079] The following further explains the fixing of the airbag and oxygen tube 2. Multiple slots 61 are provided on the connector 6. Buckles 03 are fixedly connected to the supporting airbag 41 and the breath-holding airbag 42, respectively. Specifically, buckles 03 are adhered to the side of the supporting airbag 41 and the breath-holding airbag 42 facing the oxygen tube 2, and the supporting airbag 41 and the breath-holding airbag 42 are respectively engaged with the connector 6. The connector 6 is fixedly connected to the oxygen tube 2. The connection method can be similar to an interference fit.

[0080] To ensure that the oxygen tube 2 outlet is also blocked when the nasal cavity is sealed by the support airbag 41 and the breath-holding airbag 42, the airbag 4 also includes a sealing airbag 43, which is integrally formed with the breath-holding airbag 42 and is connected to the breath-holding airbag 42. When the breath-holding airbag 42 is inflated, the sealing airbag 43 is also inflated simultaneously.

[0081] The elastic element 7 is fixedly connected inside the head 11, which further allows the sealing airbag 43 to reset after deflation, preventing the sealing airbag 43 from blocking the air inlet 111 when deflated, thus preventing oxygen from being delivered into the nasal cavity through the oxygen tube 2. The sealing airbag 43 is detachably connected inside the head 11 via the elastic element 7, and blocks the air inlet 111 when the sealing airbag 43 is inflated.

[0082] To enable the support airbag 41 and the breathalyzer 42 to inflate and deflate independently, the air inlet pipe 3 includes a first air inlet pipe 31 and a second air inlet pipe 32, both fixedly connected to the connecting hole 131. One end of the first air inlet pipe 31 is fixedly connected to the support airbag 41, and the first air inlet pipe 31 communicates with the support airbag 41. One end of the second air inlet pipe 32 is fixedly connected to the breathalyzer 42, and the second air inlet pipe 32 communicates with the breathalyzer 42. The first air inlet pipe 31 is fixedly connected to the second air inlet device 52, and the second air inlet pipe 32 is fixedly connected to the third air inlet device 53. The first air inlet pipe 31 is connected solely to the support airbag 41, and the second air inlet pipe 32 is connected solely to the breathalyzer 42. Each is connected to a different air inlet device; the support airbag 41 connected to the second air inlet device 52 is a syringe, and the breathalyzer 42 connected to the third air inlet device is a balloon. This ensures that the inflation and deflation actions do not interfere with each other.

[0083] The inflation volume of the support cuff 41 can be precisely controlled using a syringe, avoiding overinflation which could cause nasal pressure and pain, or underinflation which could lead to unstable support. The inflation of the breath-holding cuff 42 can be completed quickly using the balloon, allowing the patient to independently squeeze the balloon to instantly switch between breath-holding and holding states, reducing operation delays and ensuring the accuracy of the testing timing.

[0084] To simplify the tubing layout and avoid tangled wiring caused by excessive tubing, a large conductive element 8 is installed between oxygen tubing 2 and the air intake device 5. Oxygen tubing 2 is disconnected in the middle and fixedly connected through the large conductive element 8. A small conductive element 9 is installed between the first air intake pipe 31 and the air intake device 5. The first air intake pipe 31 is disconnected in the middle and fixedly connected through the small conductive element 9. The lengths of oxygen tubing 2 and the first air intake pipe 31 can be flexibly adjusted through the conductive elements to adapt to different patient usage scenarios and improve the versatility of the equipment. The fixed connection between oxygen tubing 2, the first air intake pipe 31, and the second air intake pipe 32 after disconnection is achieved through the large conductive element 8 and the small conductive element 9, simplifying the tubing assembly process and facilitating the individual replacement of damaged tubing sections during later maintenance, thus reducing maintenance costs.

[0085] To prevent the oxygen tube 2 from being blocked by the sealing airbag 43 due to excessive internal pressure, which could cause the sealing airbag 43 to burst open, a first one-way valve 01 is fixedly connected to one side of the side wall of the large conductor 8. An airbag 10 is detachably connected to the other side of the first one-way valve 01. The airbag 10 can store excess oxygen when the oxygen tube 2 is blocked by the sealing airbag 43.

[0086] A second one-way valve 02 is provided between the small guide component 9 and the second air intake device 52. The first air intake pipe 31 is disconnected in the middle and fixedly connected through the second one-way valve 02. The second one-way valve 02 prevents the backflow of gas in the first air intake pipe 31, so that the support airbag 41 can remain in an inflated state after inflation, avoiding the loosening of the support of the air outlet pipe 1 in the nasal cavity due to gas leakage, and ensuring the continuity of the sealing and fixation effect.

[0087] To enable the airbag 41 to deflate after inflation, a vent slot 021 is provided on one side of the second one-way valve 02. A connecting protrusion 022 is provided below the vent slot 021, and the connecting protrusion 022 is integrally formed with the second one-way valve 02. A flow slot 311 is provided at the end of the first air inlet pipe 31 near the connection of the vent slot 021, and the connecting protrusion 022 is slidably connected to the flow slot 311.

[0088] The connecting protrusion 022 of the second one-way valve 02 slides with the flow slot 311 of the first air inlet pipe 31, and the connection and closure of the air inlet 021 and the flow slot 311 can be controlled by relative sliding.

[0089] When connected, the connecting protrusion 022 slides to the lowest end of the flow groove 311. At this time, the ventilation groove 021 coincides with the flow groove 311. Under the influence of external air pressure, air flows through the first air inlet pipe 31, causing the support airbag 41 to deflate.

[0090] When closed, the connecting protrusion 022 slides to the top of the flow slot 311. At this time, the ventilation slot 021 is sealed by the inner wall of the first air inlet pipe 31, and air cannot enter. External air pressure cannot affect the internal gas delivery status.

[0091] Correspondingly, there are two outlet tubes 1. The two outlet tubes 1 are fixedly connected to the oxygen tube 2, the inlet tube 3, and the first inlet device 51, the second inlet device 52, and the third inlet device 53, respectively. The two outlet tubes 1 correspond to the left and right nasal cavities, respectively. When the support airbag 41, the breath-holding airbag 42, and the sealing airbag 43 are inflated, they can simultaneously block both nasal cavities, avoid air leakage caused by unilateral blockage, ensure that the patient meets the strict breath-holding standard, and reduce the impact of respiratory artifacts on the test results.

[0092] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A nasal oxygen cannula, characterized in that, include: The system comprises an outlet pipe (1), an oxygen pipe (2), an inlet pipe (3), a support airbag (41), a breath-holding airbag (42), and a sealing airbag (43). One end of the oxygen pipe (2) is fixedly connected to the outlet pipe (1), and the other end of the oxygen pipe (2) is fixedly connected to the first inlet device (51). The support airbag (41) and the breath-holding airbag (42) are respectively located on the outlet pipe (1). The support airbag (41) and the breath-holding airbag (42) are respectively fixedly connected to the outer wall of one end of the oxygen pipe (2). The sealing airbag (43) is located on the upper side of the breath-holding airbag (42), and the sealing airbag (43) is connected to the breath-holding airbag (42). The support airbag (41) is fixedly connected to the second air intake device (52) through the air intake pipe (3), and the air-holding airbag (42) is fixedly connected to the third air intake device (53) through the air intake pipe (3); The air outlet tube (1) is inserted into the nasal cavity, the support air bag (41) is inflated to support the nasal cavity, and the breath-holding air bag (42) and the sealing air bag (43) are inflated to block the nasal cavity, causing the patient to hold their breath. The sealing airbag (43) inflates and expands to prevent air from entering the oxygen tube (2), and the sealing airbag (43) deflates and collapses to allow gas to flow through the oxygen tube (2).

2. The nasal oxygen cannula according to claim 1, characterized in that, The air outlet pipe (1) includes: a head (11), an opening (12) and a connecting part (13), wherein the head (11) and the connecting part (13) are integrally formed at both ends of the opening part (12); An air inlet (111) is provided at the upper end of the head (11), and the sealing airbag (43) is detachably connected inside the head (11); The opening (12) is provided with a plurality of airbag slots (121), and the supporting airbag (41) and the air-holding airbag (42) are respectively disposed in the airbag slots (121); The connecting part (13) has a connecting hole (131), and the oxygen pipe (2) and the air inlet pipe (3) are respectively fixedly connected to the connecting hole (131).

3. The nasal oxygen cannula according to claim 2, characterized in that, The support airbag (41) and the breath-holding airbag (42) are arranged circumferentially along the oxygen tube (2), and the support airbag (41) and the breath-holding airbag (42) are fixedly connected to the outer wall of the oxygen tube (2) by a connector (6); The support airbag (41) and the air-holding airbag (42) are respectively fixedly connected to one end of the two air inlet pipes (3), and the other end of the two air inlet pipes (3) are respectively fixedly connected to the second air inlet device (52) and the third air inlet device (53).

4. The nasal oxygen cannula according to claim 3, characterized in that, The connector (6) has multiple slots (61), and the support airbag (41) and the air-holding airbag (42) are respectively fixedly connected with buckles (03), and the support airbag (41) and the air-holding airbag (42) are respectively engaged with the connector (6). The connector (6) is fixedly connected to the oxygen tube (2).

5. The nasal oxygen cannula according to claim 4, characterized in that, The sealing airbag (43) is integrally formed with the air-holding airbag (42), and the elastic element (7) is fixedly connected to the head (11). The sealing airbag (43) is detachably connected to the head (11) through the elastic element (7). When the sealing airbag (43) is inflated, it blocks the air inlet (111).

6. The nasal cannula according to claim 5, characterized in that, The air intake pipe (3) includes: a first air intake pipe (31) and a second air intake pipe (32), wherein the first air intake pipe (31) and the second air intake pipe (32) are respectively fixedly connected to the connecting hole (131); One end of the first air intake pipe (31) is fixedly connected to the support airbag (41), and the first air intake pipe (31) is connected to the support airbag (41); One end of the second air intake pipe (32) is fixedly connected to the air-holding bladder (42), and the second air intake pipe is connected to the air-holding bladder (42); The first air intake pipe (31) is fixedly connected to the second air intake device (52), and the second air intake pipe (32) is fixedly connected to the third air intake device (53).

7. The nasal oxygen cannula according to claim 6, characterized in that, A large conductive component (8) is provided between the oxygen pipe (2) and the first air inlet device (51), and the oxygen pipe (2) is disconnected in the middle and fixedly connected through the large conductive component (8); A small guide (9) is provided between the first air intake pipe (31) and the second air intake device (52). The first air intake pipe (31) is disconnected in the middle and fixedly connected by the small guide (9). A small guide (9) is provided between the second air intake pipe (32) and the third air intake device (53). The second air intake pipe (32) is disconnected in the middle and fixedly connected through the small guide (9).

8. The nasal oxygen cannula according to claim 7, characterized in that, The side wall of the large conductive component (8) is fixedly connected to one side of the first one-way valve (01), and the other side of the first one-way valve (01) is detachably connected to an airbag (10); A second one-way valve (02) is provided between the small guide component (9) and the second air intake device (52), and the first air intake pipe (31) is disconnected in the middle and fixedly connected through the second one-way valve (02).

9. The nasal oxygen cannula according to claim 8, characterized in that, The second one-way valve (02) has a vent slot (021) on one side, and a connecting protrusion (022) is provided below the vent slot (021). The connecting protrusion (022) is integrally formed with the second one-way valve (02). The first air inlet pipe (31) has a flow groove (311) at one end near the connection of the air vent (021), and the connecting protrusion (022) is slidably connected to the flow groove (311).

10. The nasal oxygen cannula according to any one of claims 1-9, characterized in that, There are two outlet pipes (1), and the two outlet pipes (1) are fixedly connected through the oxygen pipe (2), the inlet pipe (3), the first inlet device (51), the second inlet device (52), and the third inlet device (53), respectively.

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