Respiratory support oxygen cannula

Abstract

The application provides a breathing support oxygen inhalation tube, which comprises a communicating oxygen inhalation anterior nasal cavity and an oxygen inhalation tube; fixed bands are arranged on both sides of the oxygen inhalation anterior nasal cavity, and a flexible intranasal tube is arranged on the oxygen inhalation anterior nasal cavity in correspondence with the nasal cavity; the side wall of the oxygen inhalation anterior nasal cavity corresponding to the nasal cavity is obliquely away from the nostril, and correspondingly, the connecting part of the flexible intranasal tube and the oxygen inhalation anterior nasal cavity is arranged as an enlarged plugging part which is matched with the nostril, and the enlarged plugging part is located outside the nasal cavity; a pressure relief port with an area of 15-25 mm 2 is arranged on the base of the oxygen inhalation anterior nasal cavity corresponding to the skin of the anterior nasal region; when the patient is in apnea, high-flow oxygen inhalation with a flow rate of 40-70 L / min is implemented, the enlarged plugging part is intermittently lifted to plug the nostril, and the patient can be provided with 30-70 cmH2O pressure of inhalation support; the structure is simple, the cost is low, the oxygen inhalation tube is disposable, and the oxygen inhalation tube is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to respiratory support oxygen inhalation tubing. Background Technology

[0002] Patients with respiratory failure or under anesthesia often require oxygen therapy, including high-flow oxygen therapy. High-flow oxygen therapy is becoming increasingly common in clinical practice, providing patients with a high level of oxygenation and becoming the most effective oxygenation method before mechanical ventilation.

[0003] If a patient's breathing becomes extremely weak or stops, even high-flow oxygen therapy may not be able to correct the patient's hypoxia. In this case, the oxygen tubing should be immediately disconnected and emergency ventilation should be performed using a mask combined with a breathing bag / anesthesia machine, or endotracheal intubation combined with an anesthesia machine for mechanical ventilation.

[0004] Many non-anesthesiologists are unfamiliar with mask ventilation or endotracheal intubation for mechanical ventilation, resulting in poor outcomes and requiring emergency consultation with an anesthesiologist, often delaying optimal treatment. Furthermore, even anesthesiologists frequently experience mild to moderate hypoxemia during the establishment of assisted ventilation by removing the tubing; if mask ventilation or endotracheal intubation equipment is not prepared in advance, it can lead to severe hypoxemia, even endangering the patient's life.

[0005] Intravenous anesthesia has a high incidence of respiratory depression. High-flow oxygen therapy can prevent most cases of decreased oxygenation, but severe respiratory depression and apnea still occur. To ensure safety, each patient must have a spare anesthesia mask and related equipment. This not only leads to a significant waste of medical supplies and increases medical expenses, but also makes it difficult to avoid cross-infection if supplies such as masks are reused.

[0006] There is an urgent clinical need for a new type of oxygen tubing that can provide both normal and high-flow oxygen therapy and conveniently offer temporary assisted respiratory support to patients. Summary of the Invention

[0007] In view of the above-mentioned defects of the prior art, the present invention provides a respiratory support oxygen inhalation tube, including a connected prenasal cavity for oxygen inhalation and an oxygen inhalation tube, wherein fixed straps are provided on both sides of the prenasal cavity for oxygen inhalation, and flexible intranasal tubes are respectively connected to the two nostrils of the prenasal cavity for oxygen inhalation. The upper part of the anterior nasal wall of the oxygen inhalation anterior cavity is obliquely separated from the nasal cavity opening. Correspondingly, the connection part between the flexible nasal tube and the anterior nasal wall is set as an enlarged blocking part adapted to the nasal cavity opening. The enlarged blocking part is located outside the nasal cavity, and the shape of the enlarged blocking part is not smaller than the shape of the corresponding nostril opening. The base wall of the oxygen inhalation anterior nasal cavity is adapted to the corresponding anterior nasal skin surface, and the base wall area is 15-25 mm². 2 The pressure relief port.

[0008] Furthermore, there are multiple pressure relief ports, and the sum of the areas of the multiple pressure relief ports is 15-25 mm. 2 .

[0009] Furthermore, a flexible seal is provided around the pressure relief port on the base wall.

[0010] Furthermore, the enlarged sealing portion is shaped like a frustum conical shape; the protrusion is located on the anterior nasal wall or at the root of the flexible nasal tube, and the distal end of the enlarged sealing portion away from the anterior nasal wall has a smaller outer diameter than the inner diameter of the nostril, while the proximal end near the anterior nasal wall has a larger outer diameter than the nostril.

[0011] Furthermore, an operating body is provided at the top of the anterior nasal wall; the oxygen inhalation anterior nasal cavity is adapted to be worn in the anterior nasal area, supporting the operating body towards the nasal cavity; the anterior nasal wall of the oxygen inhalation anterior nasal cavity is flipped to fit close to the nostril area, and the enlarged blocking part blocks the corresponding nostril; at the same time, the pressure relief port of the base wall of the oxygen inhalation anterior nasal cavity is completely lifted away from the anterior nasal skin and is completely open.

[0012] Furthermore, the interface between the anterior nasal wall and the basal wall is smoothly transitioned to form a nasal curved surface; Holding the operating body, the anterior nasal cavity rotates around the nasal curved surface as an axis, the anterior nasal wall approaches the nostril, and the expanded blocking part blocks the corresponding nostril; at the same time, the pressure relief port is lifted away from the anterior nasal skin and fully opened.

[0013] Furthermore, the fixing band is a flexible sheet at the part connecting the two sides of the anterior nasal cavity for oxygen inhalation, and the fixing band has a depression on the side away from the nasal cavity near the root of the anterior nasal cavity for oxygen inhalation.

[0014] Furthermore, connecting stems are provided at both ends of the recess, the length of the connecting stems being greater than the distance between the two ends of the recess, and the connecting stems including V-shapes or U-shapes.

[0015] Furthermore, the oxygen inhalation anterior nasal cavity includes two independent cavities, each connected to a flexible nasal tube; One of the chambers is connected to the oxygen inhalation tube to form an oxygen supply chamber; Another chamber is set up as a carbon dioxide collection chamber, connected to a carbon dioxide collection tube, with an interface at the end of the carbon dioxide collection tube; The pressure relief port is located on the base wall of the oxygen supply chamber, communicates with the oxygen supply chamber, and is isolated from the carbon dioxide collection chamber.

[0016] Furthermore, the method of using the aforementioned respiratory support oxygen inhalation tube is as follows: S1, connect the oxygen supply tube to the humidified oxygen inhalation bottle and turn on the oxygen; connect the carbon dioxide collection tube (5) to the end-tidal carbon dioxide partial pressure monitoring instrument. S2, Wear the respiratory support oxygen tubing correctly to provide oxygen therapy to the patient; S3, When apnea occurs, adjust the oxygen flow rate to 40-70L / min, intermittently support the operating body, so that the expanded blocking part of the flexible nasal tube intermittently blocks the corresponding nostril; The alternation frequency of sealing and opening of the nasal cavity by the enlarged occluder is controlled at 15-30 bpm, and the ratio of sealing to opening time is 1:1-1:3. S4. Respiration resumes, the condition is relieved, stop the intermittent support of the operating body, adjust the oxygen flow rate as appropriate, and resume oxygen therapy; S5, Treatment complete. Turn off oxygen and end-tidal carbon dioxide partial pressure monitoring equipment, and remove the respiratory support oxygen tubing.

[0017] The beneficial effects of this invention are: 1. For patients with spontaneous breathing, this product, when used with a humidified oxygen cylinder and a warmer, can be used for both regular and high-flow oxygen therapy. 2. In case of severe respiratory depression or apnea, high-flow oxygen therapy with alternating high and low pressure can be used for respiratory support to avoid switching to mask or endotracheal intubation for respiratory support, thereby improving patient safety. 3. During respiratory support, the maximum pressure should be less than 70 cmH2O to avoid barotrauma. 4. When using nasal oxygen therapy, it can be used in conjunction with an end-tidal carbon dioxide monitor to monitor the partial pressure of end-tidal carbon dioxide in real time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the longitudinal section (partial) of the anterior nasal cavity for oxygen inhalation in the example; Figure 3 for Figure 1 A schematic diagram of the cross-section of the anterior nasal cavity through the flexible nasal tube in the embodiment; Figure 4 for Figure 1 A schematic diagram of the cross-section of the anterior nasal cavity through the pressure relief port during oxygen inhalation, as shown in the example. Figure 5 This is a schematic diagram of the second embodiment of the present invention; Figure 6 This is a schematic diagram showing the bottom view of the respiratory support oxygen inhalation tube according to the third embodiment of the present invention; Figure 7 for Figure 6 Enlarged view of area A.

[0019] In the picture, 1. Anterior nasal cavity for oxygen inhalation; 11. Anterior nasal wall; 12. Basal wall; 13. Pressure relief port; 14. Nasal curved surface; 1A. Oxygen supply cavity; 1B. Carbon dioxide collection cavity; 2. Fixation band; 21. Depression; 22. Connecting stem; 3. Flexible nasal tube; 4. Expanded occlusion section; 5. Carbon dioxide collection tube. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0022] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0023] like Figure 1-4 and Figure 6-7 As shown, the present invention discloses a respiratory support oxygen tubing, comprising a connected prenasal cavity 1 and an oxygen tubing. Fixing straps 2 are provided on both sides of the prenasal cavity 1, and flexible intranasal tubes 3 are respectively connected to the two corresponding nasal cavities of the prenasal cavity 1. The prenasal cavity 1 is fitted and fixed to the upper lip of the patient's nasal cavity by the fixing straps 2 on both sides, and the flexible intranasal tubes 3 extend into the nasal cavity. There are two embodiments of the oxygen tubing. One is used to connect to a humidified oxygen cylinder, providing oxygen to the patient through a central oxygen supply or oxygen cylinder. Oxygen flows through the oxygen tubing into the prenasal cavity 1, and then through the flexible intranasal tubes 3 and is released into the patient's nasal cavity. By adjusting the oxygen flow rate of the humidified oxygen cylinder, oxygen therapy with a flow rate of 0-70 L / min can be provided to the patient. Another embodiment of the oxygen tubing is a corrugated tube, used to connect to a high-flow oxygen concentrator, providing the patient with heated and humidified high-flow oxygen; its working principle is similar.

[0024] Previously, if a patient experienced severe respiratory depression, it was necessary to quickly remove the nasal cannula and switch to a face mask for pressurized oxygen administration, or directly perform endotracheal intubation and mechanical ventilation. All of these procedures required the preparation of necessary supplies and equipment in advance. Preparing these for every patient would inevitably lead to waste; failing to do so would inevitably delay treatment when severe respiratory depression occurred, resulting in severe hypoxemia and even serious consequences.

[0025] In order to enable the oxygen inhalation tube to provide respiratory assistance to the patient, the upper part of the anterior nasal wall 11 of the oxygen inhalation tube 1 of the present invention is obliquely separated from the nasal cavity opening. Correspondingly, the connection part of the flexible intranasal tube 3 and the anterior nasal wall 11 is provided with an enlarged sealing part 4 adapted to the nasal cavity opening. The enlarged sealing part 4 is located outside the nasal cavity, and the shape of the enlarged sealing part 4 is not smaller than the shape of the corresponding nostril opening.

[0026] When the patient breathes oxygen spontaneously, the flexible nasal tube 3 extends into the shallow part of the patient's nasal cavity, but the enlarged sealing part 4 is located outside the patient's nasal cavity. The enlarged sealing part 4 is positioned at an appropriate distance from the nasal opening by the upper part of the anterior nasal wall 11 corresponding to the oxygen inhalation anterior nasal cavity 1, ensuring sufficient clearance between the outer wall of the thinner flexible nasal tube 3 and the inner wall of the patient's nasal cavity. When the patient inhales, oxygen enters the patient's lungs; when the patient exhales, the exhaled air is expelled through this clearance. Even when the patient's mouth is closed, the gas passage remains unobstructed, preventing expiratory obstruction.

[0027] It should be noted that the shape of the enlarged occlusal part 4 is not smaller than the shape of the corresponding nostril opening; that is, the outer diameter of the largest cross-section of the enlarged occlusal part 4 is not smaller than the shape of the nostril opening. When the patient experiences severe respiratory depression, the enlarged occlusal part 4 enters the nasal cavity opening, blocking it and obstructing the space through which oxygen can escape through the nasal cavity. This increases the oxygen pressure within the nasal cavity, exceeding the pressure in the patient's lungs, allowing oxygen to enter the expiratory tract and then the lungs, thus assisting inhalation. After inhalation, the enlarged occlusal part 4 withdraws from the nasal cavity opening, reopening the gap between the outer wall of the flexible nasal tube 3 and the inner wall of the patient's nasal cavity. This reduces the pressure within the nasal cavity, lowering it below the pressure in the lungs, allowing air to escape through the respiratory tract and exit through the nostril opening, thus achieving exhalation. The enlarged occlusal part 4 intermittently blocks the nostril opening, alternating between inhalation and exhalation to provide respiratory support.

[0028] like Figure 1-4 and Figure 6-7 As shown, the base wall 12 of the oxygen inhalation anterior nasal cavity 1 is adapted to the corresponding anterior nasal skin surface, and the base wall 12 has an area of ​​15-25 mm². 2 Pressure relief port 13.

[0029] During normal oxygen inhalation, the nasal cavity is relatively open and the gas pressure is extremely low. The lower surface of the basal wall 12 of the anterior nasal cavity 1 is in contact with the skin surface of the corresponding upper lip of the nose. The pressure relief port 13 is blocked by the skin surface, and very little gas escapes through the pressure relief port 13, so its impact on oxygen inhalation is almost negligible.

[0030] When performing inspiratory assisted breathing, if the patient's mouth is closed too tightly and the central oxygen supply (including cylinder oxygen supply) pressure is high (approximately 0.4-1 MPa), and the enlarged occlusion 4 blocks the patient's nasal opening for an extended period, excessive oxygen may enter the lungs, causing a rapid increase in intrapulmonary pressure and potentially leading to severe barotrauma and alveolar rupture—an extremely dangerous condition. To avoid this risk, the base wall 12 of the prenasal cavity 1 for oxygen inhalation has an area of ​​15-25 mm². 2 The pressure relief port 13 reduces the pressure of the gas entering the nasal cavity even when the patient's mouth is completely closed, thus lowering the pressure of the gas entering the lungs to a safe range.

[0031] Specifically, the area should be set at 15-25mm. 2 After the pressure relief port 13 is opened, under extreme conditions (complete closure of the patient's oral cavity), the relationship between oxygen flow rate and the highest gas pressure in the nasal cavity (prolonged obstruction of the patient's nasal opening by the expanded occlusion part 4) is as follows: The test method is as follows: the flexible nasal tube 3 is completely clamped, while the pressure relief port 13 is completely open.

[0032] In summary, the design of the pressure relief port 13 ensures the safety of the inhalation assistance operation of this invention. Even if the enlarged occlusion part 4 blocks the patient's nasal opening for too long, the gas pressure in the lungs remains within a safe range and will not cause barotrauma.

[0033] Specifically, the specific operation of using this invention to implement respiratory assistance is as follows: Depending on the specific condition (the sealing condition of the lips), increase the oxygen flow rate to 40-70 L / min. The greater the leakage at the lips, the greater the gas flow rate; the less the leakage, the smaller the gas flow rate; if there is no leakage, adjust to the minimum. Operate the expanded sealing part 4 to intermittently block or move away from the nostril opening, thus opening the nostrils. The optimal frequency of alternating nostril opening and sealing is 15-30 bpm, and the preferred ratio of sealing to opening time is 1:1-1:3.

[0034] Specifically, when a patient experiences respiratory arrest and requires assisted breathing, it is recommended to start with an oxygen flow rate of 40 L / min and gradually increase it according to the patient's condition until satisfactory results are achieved. In reality, due to varying degrees of gas leakage through the oral cavity, the upper limit of gas pressure decreases to some extent, but this does not affect the manual assisted breathing methods described above. However, the oxygen flow rate needs to be adjusted gradually based on the actual gas leakage situation in the patient's oral cavity. In special circumstances, even at a maximum oxygen flow rate of 70 L / min, barotrauma to the patient's lungs caused by high-pressure gas can be avoided, ensuring safety.

[0035] When the inspiratory assistance is ineffective and the patient's oxygenation is not satisfactory, the patient's chin can be lifted to improve the oral cavity seal, reduce gas leakage through the mouth, and increase the gas pressure during inspiratory assistance, which can effectively improve the inspiratory assistance effect and improve the patient's oxygenation.

[0036] It should be noted that when a patient experiences upper airway obstruction due to posterior tongue displacement, operating the enlarged occlusion part 4 to block the nasal opening will generate higher gas pressure within the nasal cavity, lifting the tongue, relieving the posterior displacement, and clearing the airway. This avoids the need for a nasopharyngeal airway, reducing operational complexity and the need for additional consumables (nasopharyngeal airway). The pressure required to lift the tongue is only 20 mbar, and this product only requires adjusting the gas flow rate to 45 L / min or higher to achieve this effect.

[0037] Furthermore, there are multiple pressure relief ports 13, and the sum of the areas of the multiple pressure relief ports 13 is 15-25 mm. 2 The multiple pressure relief ports 13 serve the same functions as described above, and the operation method during intake assistance is the same, so it will not be repeated here.

[0038] Furthermore, the base wall 12 is provided with a flexible sealing body around the pressure relief port 13. The flexible sealing body includes a thin, flexible annular membrane surrounding the pressure relief port 13. When the patient is inhaling oxygen normally, under the action of gas pressure, the flexible annular membrane deforms and adheres to the surface of the patient's upper lip and anterior nasal skin, making the pressure relief port 13 of the oxygen inhalation anterior nasal cavity 1 more airtight with the skin, further reducing gas leakage through the pressure relief port 13 during normal oxygen inhalation, or even eliminating leakage altogether; when high-flow oxygen inhalation is performed with inhalation assistance, the pressure relief port 13 opens away from the skin, and it has no effect on the decompression effect of the gas in the nasal cavity.

[0039] Furthermore, such as Figure 1-4 and Figure 6-7 As shown, the enlarged sealing part 4 is shaped like a frustum of a cone. The protrusion is located on the anterior nasal wall 11 or the root of the flexible nasal tube 3. The distal end of the enlarged sealing part 4, away from the anterior nasal wall 11, has a shape smaller than the inner diameter of the nostril and similar to the outer diameter of the flexible nasal tube 3, maintaining a gap with the inner wall of the nostril during normal oxygen inhalation, thus not affecting the patient's breathing. The proximal end, near the anterior nasal wall 11, has a shape larger than the nostril, effectively blocking the nostril opening and effectively increasing the gas pressure inside the nasal cavity during inhalation assistance. Since the size of the nasal opening varies among different patients, the frustum-shaped design of the enlarged sealing part 4 allows its outer diameter to gradually change. The shape is smaller on the side corresponding to the patient's nostril and larger on the side away from the nostril, effectively adapting and blocking different patients' nostrils. This enhances the product's versatility and makes it suitable for adults of normal build.

[0040] Furthermore, an operating body is provided at the top of the anterior nasal wall 11; the oxygen-inhaling anterior nasal cavity 1 is fitted and worn in the anterior nasal region, supporting the operating body towards the nasal cavity. The anterior nasal wall 11 of the oxygen-inhaling anterior nasal cavity 1 is flipped to fit close to the nostril area, and the enlarged occlusion part 4 blocks the corresponding nostril; simultaneously, the pressure relief port 13 of the base wall 12 of the oxygen-inhaling anterior nasal cavity 1 is lifted away from the anterior nasal skin and fully opened. When performing inspiratory assistance, the operating body is simply pried open with fingers, causing the upper part of the oxygen-inhaling anterior nasal cavity 1, which is obliquely away from the nasal cavity opening, to rotate closer to the patient's nasal cavity, causing the enlarged occlusion part 4 to shift into the nasal cavity, ultimately blocking the nostril opening. After the inspiratory assistance operation is completed, the operating body is released, allowing the enlarged occlusion part 4 to return to its original position, and the nasal cavity to reopen, thus entering the exhalation state. Alternating between inspiratory assistance and exhalation completes the respiratory assistance operation. The design of the operating body makes inspiratory assistance operation simpler and easier, but it is not essential. Without setting up an operating body, during inhalation assistance, it is only necessary to directly pry open the prenasal cavity 1 for oxygenation, so that the enlarged blocking part 4 blocks the nasal opening.

[0041] Furthermore, such as Figure 3-4 and Figure 6-7 As shown, the interface between the anterior nasal wall 11 and the base wall 12 is smoothly transitioned, forming the nasal surface 14. Supporting the operating body, the oxygen-inhaling anterior nasal cavity 1 rotates with the nasal surface 14 as its supporting surface. The anterior nasal wall 11 is close to the nostril, and the enlarged occlusion part 4 seals the corresponding nostril. Simultaneously, the pressure relief port 13 is lifted away from the anterior nasal skin and fully open. During assisted breathing, the oxygen-inhaling anterior nasal cavity 1 is repeatedly manipulated to seal the nostril opening with the enlarged occlusion part 4. When the oxygen-inhaling anterior nasal cavity 1 moves, the interface between the anterior nasal wall 11 and the base wall 12, i.e., the nasal surface 14, serves as the skin's stress point and the surface on which the oxygen-inhaling anterior nasal cavity 1 rotates. The nasal surface 14 is designed in an arc shape to minimize skin friction damage caused by repeated rotation of the nasal surface 14, while also making the manipulation and repositioning of the oxygen-inhaling anterior nasal cavity 1 more stable and convenient. The nasal surface 14 is soft and smooth, and its curvature is basically consistent with the curvature of the corresponding skin.

[0042] Furthermore, such as Figure 6-7 As shown, the fixing band 2 is a flexible sheet at the part connecting the two sides of the oxygen inhalation anterior nasal cavity 1, and the fixing band 2 has a recess 21 on the side away from the nasal cavity near the root of the oxygen inhalation anterior nasal cavity 1.

[0043] When a patient experiences severe respiratory depression and requires inspiratory assistance, the prenasal cavity 1 needs to be rotated towards the nostrils. The slightly wider fixing bands 2 on both sides of the prenasal cavity 1 slightly obstruct the rotation. The recess 21 near the base of the fixing bands 2 greatly reduces the lever arm of the prenasal cavity 1 when rotating towards the nostrils, making the rotation of the prenasal cavity 1 more stable and convenient. This also reduces the displacement of the base of the fixing bands 2 on the surface of the upper lip skin when the prenasal cavity 1 rotates towards the nostrils, further reducing frictional damage to the surface of the upper lip skin on both sides of the nasal cavity when the prenasal cavity 1 rotates.

[0044] Furthermore, similarly Figure 6-7 As shown, connecting stems 22 are provided at both ends of the recess 21. The length of the connecting stems 22 is greater than the distance between the two ends of the recess 21. The connecting stems 22 include V-shaped, U-shaped, or W-shaped.

[0045] The recess 21 located near the root of the fixing band 2, close to the anterior nasal cavity 1, reduces friction on the surface of the anterior nasal skin of the upper lip during rotation of the anterior nasal cavity 1. However, it also reduces the stability of the anterior nasal cavity 1 in position on the anterior nasal skin of the upper lip during normal oxygen inhalation. By providing connecting stems 22 at both ends of the recess 21 with a length greater than the distance between the two ends of the recess 21, the stability of the anterior nasal cavity 1 in position on the anterior nasal skin of the upper lip during normal oxygen inhalation is increased. At the same time, since the connecting stems 22 are elastic, narrow strips with a length greater than the distance between the two ends of the recess 21, they do not hinder the rotation of the anterior nasal cavity 1 towards the nostrils, thus meeting the needs of clinical use.

[0046] By setting the recess 21 and the matching connecting stem 22, the friction of the oxygen inhalation anterior nasal cavity 1 on the surface of the upper lip and anterior nasal skin is reduced when the oxygen inhalation anterior nasal cavity 1 rotates, and the stability of the position of the oxygen inhalation anterior nasal cavity 1 on the upper lip and anterior nasal skin during normal oxygen inhalation is not affected.

[0047] Furthermore, such as Figure 5 As shown, the prenasal cavity 1 for oxygen inhalation includes two independent cavities, each connected to a flexible nasal tube 3. One cavity is connected to the oxygen inhalation tube to form an oxygen supply cavity 1A; the other cavity is configured as a carbon dioxide collection cavity 1B, connected to a carbon dioxide collection tube 5, with an interface at the tail end of the carbon dioxide collection tube 5. The pressure relief port 13 is located on the base wall 12 of the oxygen supply cavity 1A, connected to the oxygen supply cavity 1A, and isolated from the carbon dioxide collection cavity 1B.

[0048] Thus, regardless of whether oxygen is inhaled at normal or high flow rates, the flexible nasal tube 3, connected to the oxygen supply chamber 1A, provides oxygen at different flow rates and pressures to one nostril of the patient. Simultaneously, another flexible nasal tube 3, connected to the carbon dioxide collection chamber 1B, extends into the opposite nostril. It does not contribute to oxygen intake but serves to collect exhaled gas samples during exhalation, continuously monitoring the patient's end-tidal carbon dioxide partial pressure. Of course, when implementing end-tidal carbon dioxide partial pressure monitoring, the interface at the end of the carbon dioxide collection tube 5 should be correctly connected to the end-tidal carbon dioxide monitor. Under the negative pressure of the instrument, the patient's exhaled gas enters the carbon dioxide collection chamber 1B through the corresponding flexible nasal tube 3, then passes through the carbon dioxide collection tube 5 into the carbon dioxide partial pressure monitoring module. Analysis yields the patient's real-time end-tidal carbon dioxide partial pressure data, allowing for assessment of the patient's respiratory status.

[0049] This design allows one of the two flexible nasal cannulas (3) to perform oxygen administration while the other performs end-tidal carbon dioxide sampling. The two tubing lines are isolated from each other, ensuring the reliability of end-tidal carbon dioxide monitoring data. It is important to note that because oxygen is supplied through a single nostril, the oxygen flow rate should not be too high when the patient is awake, as this can cause discomfort; generally, less than 15 L / min is recommended. When the patient is under anesthesia, the oxygen flow rate can be appropriately increased.

[0050] When oxygen is administered through one nostril, the pressure relief port 13 is naturally connected to the base wall 12 of the oxygen supply chamber 1A. In cases of severe respiratory depression or apnea, inspiratory assistance can also increase the nasal gas pressure and ensure it remains within a safe range. The pressure relief port 13 should be isolated from the carbon dioxide collection chamber 1B to prevent external gas from entering the carbon dioxide collection chamber 1B through the pressure relief port 13 during expiratory sampling, which would dilute the nasal oxygen sample.

[0051] The respiratory support oxygen inhalation tube of the present invention is used as follows: S1, connect the oxygen supply tube to the humidified oxygen inhalation bottle and turn on the oxygen; if a carbon dioxide collection tube 5 is set, it can be connected to an end-tidal carbon dioxide partial pressure monitoring instrument.

[0052] S2. Properly attach the respiratory support oxygen tubing to provide oxygen therapy to the patient. When the patient is awake, the oxygen flow rate should generally not exceed 20 L / min; after anesthesia, the oxygen flow rate can be adjusted up to a maximum of 70 L / min.

[0053] S3, When apnea occurs, adjust the oxygen flow rate to 40-70L / min, intermittently support the operating body, so that the expanded blocking part 4 of the flexible nasal tube 3 intermittently blocks the corresponding nostril; The alternation frequency of sealing and opening of the four pairs of nostrils in the enlarged occluder should be controlled at 15-30 bpm, with a sealing-to-opening time ratio of 1:1-1:3. If effective oxygenation cannot be maintained even with oxygen inhalation at 70 L / min and the above-mentioned respiratory assistance measures, endotracheal intubation and mechanical ventilation must be performed.

[0054] S4. Respiration resumes, the condition is relieved, stop the intermittent support of the operating body, adjust the oxygen flow rate as appropriate, and resume oxygen therapy; S5, Treatment complete. Turn off oxygen and end-tidal carbon dioxide partial pressure monitoring equipment, and remove the respiratory support oxygen tubing.

[0055] In summary, this invention provides inspiratory assistance by incorporating an enlarged occlusion section 4 at the root of the flexible nasal tube 3 connected to the anterior nasal cavity 1 for oxygen inhalation. When a patient experiences severe respiratory depression, the enlarged occlusion section 4 is operated to block the nostrils, increasing the gas pressure within the nasal cavity connected to the airway and allowing oxygen to enter the patient's lungs. Furthermore, an area of ​​15-25 mm is provided on the base wall 12 of the anterior nasal cavity 1 for oxygen inhalation. 2 The pressure relief port 13 lowers the upper limit of gas pressure in the nasal cavity to a safe range when the patient's nostrils are blocked, thus avoiding lung barotrauma caused by high-pressure gas.

[0056] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A respiratory support oxygen inhalation tube, comprising a connected prenasal cavity (1) and an oxygen inhalation tube, wherein fixed straps (2) are provided on both sides of the prenasal cavity (1), and flexible intranasal tubes (3) are respectively connected to the two nostrils of the prenasal cavity (1); characterized in that: The oxygen inhalation anterior nasal cavity (1) is obliquely separated from the nasal cavity opening by the upper part of the anterior nasal wall (11) of the nasal cavity. Correspondingly, the connection part between the flexible nasal tube (3) and the anterior nasal wall (11) is set as an enlarged sealing part (4) adapted to the nasal cavity opening. The enlarged sealing part (4) is located outside the nasal cavity, and the shape of the enlarged sealing part (4) is not smaller than the shape of the corresponding nostril opening. The base wall (12) of the oxygen inhalation anterior nasal cavity (1) is adapted to the corresponding anterior nasal skin surface, and the base wall (12) has an area of ​​15-25 mm. 2 The pressure relief port (13).

2. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: There are multiple pressure relief ports (13), and the sum of the areas of the multiple pressure relief ports (13) is 15-25 mm. 2 .

3. The respiratory support oxygen inhalation tubing according to claim 1 or 2, characterized in that: The base wall (12) is provided with a flexible seal around the pressure relief port (13).

4. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: The enlarged sealing part (4) is shaped like a frustum cone; the protrusion is located on the anterior nasal wall (11) or at the root of the flexible nasal tube (3). The distal end of the enlarged sealing part (4) away from the anterior nasal wall (11) has a smaller diameter than the inner diameter of the nostril, while the proximal end near the anterior nasal wall (11) has a larger diameter than the nostril.

5. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: An operating body is provided at the top of the anterior nasal wall (11); the oxygen inhalation anterior nasal cavity (1) is adapted to be worn in the anterior nasal area, and the operating body is held against the nasal cavity. The anterior nasal wall (11) of the oxygen inhalation anterior nasal cavity (1) is flipped to be close to the nostril area, and the enlarged sealing part (4) blocks the corresponding nostril. At the same time, the pressure relief port (13) of the base wall (12) of the oxygen inhalation anterior nasal cavity (1) is completely lifted away from the anterior nasal skin and is completely open.

6. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: The interface between the anterior nasal wall (11) and the basal wall (12) is smoothly transitioned to form the nasal surface (14). Holding the operating body, the anterior nasal cavity (1) for oxygen inhalation rotates around the nasal curved surface (14) as the axis, the anterior nasal wall (11) approaches the nostril, and the enlarged sealing part (4) seals the corresponding nostril; at the same time, the pressure relief port (13) is lifted away from the anterior nasal skin and fully opened.

7. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: The fixing band (2) is a flexible sheet at the part connecting the two sides of the oxygen inhalation anterior nasal cavity (1). The fixing band (2) has a depression (21) on the side away from the nasal cavity near the root of the oxygen inhalation anterior nasal cavity (1).

8. The respiratory support oxygen inhalation tubing according to claim 7, characterized in that: Connecting stems (22) are provided at both ends of the recess (21), and the length of the connecting stems (22) is greater than the distance between the two ends of the recess (21).

9. The respiratory support oxygen inhalation tubing according to claim 1, characterized in that: The oxygen inhalation anterior nasal cavity (1) includes two independent cavities, each connected to a flexible nasal tube (3). One of the chambers is connected to the oxygen inhalation tube to form an oxygen supply chamber (1A). Another cavity is set as a carbon dioxide collection cavity (1B), which is connected to a carbon dioxide collection tube (5), and an interface is set at the tail of the carbon dioxide collection tube (5); The pressure relief port (13) is located on the base wall (12) of the oxygen supply chamber (1A), communicates with the oxygen supply chamber (1A), and is isolated from the carbon dioxide collection chamber (1B).

10. The respiratory support oxygen inhalation tubing according to any one of claims 1-9, wherein the method of use is as follows: S1, connect the oxygen supply tube to the humidified oxygen inhalation bottle and turn on the oxygen; connect the carbon dioxide collection tube (5) to the end-tidal carbon dioxide partial pressure monitoring instrument. S2, Wear the respiratory support oxygen tubing correctly to provide oxygen therapy to the patient; S3, When apnea occurs, adjust the oxygen flow rate to 40-70L / min, intermittently support the operating body, so that the expanded blocking part (4) of the flexible nasal tube (3) intermittently blocks the corresponding nostril; The frequency of alternating sealing and opening of the nostrils by the expanded sealing part (4) is controlled at 15-30 bpm, and the ratio of sealing to opening time is 1:1-1:3; S4. Respiration resumes, the condition is relieved, stop the intermittent support of the operating body, adjust the oxygen flow rate as appropriate, and resume oxygen therapy; S5, Treatment complete. Turn off oxygen and end-tidal carbon dioxide partial pressure monitoring equipment, and remove the respiratory support oxygen tubing.

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