Tongue falling prevention nasal oxygen cannula capable of detecting end-expiratory carbon dioxide

Abstract

The utility model discloses a nasal oxygen cannula capable of preventing tongue falling and detecting end-expiratory carbon dioxide, which belongs to the technical field of medical instruments and comprises a nasal oxygen cannula, a nasal oxygen cannula body, a nasal plug and an oxygen source connector, and the nasal oxygen cannula body and the oxygen source connector are respectively arranged at two ends of the oxygen supply cannula body. The carbon dioxide detection unit comprises a breather pipe and a carbon dioxide pipe, the breather pipe sleeves the nasal plug, one end of the carbon dioxide pipe is arranged in the breather pipe, the end, with a smaller opening, of the trumpet-shaped sampling head is connected with the end, close to the breather pipe, of the carbon dioxide pipe, and the end, away from the sampling head, of the carbon dioxide pipe penetrates through the side wall of the breather pipe. The utility model has the beneficial effects that a certain gas conveying channel is opened for the obstructed respiratory tract under the supporting action of the breather pipe, so that the occurrence of hypoxemia is reduced; meanwhile, a collection area for carbon dioxide detection is separated from an outlet area for oxygen supply through the sampling head, so that the influence of oxygen on the concentration of carbon dioxide in exhaled air is avoided, and the accuracy of an end-expiratory carbon dioxide detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a nasal oxygen tube which can prevent tongue drop and detect end-tidal carbon dioxide. Background Art

[0002] Nasal oxygen cannula is a medical product made of soft polyvinyl chloride and silicone rubber, mainly composed of a bell mouth, a nose plug, a head and other parts. It is connected to the oxygen supply system to directly supply oxygen to the human body. The end of the cannula is placed in the nostril to supply oxygen and help improve the symptoms of hypoxia. Nasal oxygen cannula is suitable for various reasons when the body cannot supply oxygen normally.

[0003] End-tidal carbon dioxide partial pressure (PETCO2) has been considered the sixth basic vital sign in addition to body temperature, respiration, pulse, blood pressure, and arterial oxygen saturation. It can reflect the ventilation function of the lungs and monitor some obvious pulmonary blood flow abnormalities to a certain extent. It is mainly used in clinical anesthesia, ventilator safety and other applications.

[0004] The patient end of the traditional nasal oxygen tube can only be placed at the patient's nostrils. In comatose patients or patients who need to be sedated with drugs, the tongue often falls back, causing upper airway obstruction. Even if a nasal oxygen tube is used for oxygen inhalation, due to the existence of upper airway obstruction, ventilation is prone to be insufficient, resulting in hypoxemia. If not discovered in time, serious consequences or even death will occur. In the prior art, when the patient's end-tidal carbon dioxide is detected by sampling with a nasal oxygen tube, the end-tidal carbon dioxide and air are easily mixed at the junction, thereby reducing the concentration of carbon dioxide, and the measured end-tidal carbon dioxide value is lower than the standard value.

[0005] For example, the utility model patent with announcement number CN220495380U discloses a nasopharyngeal ventilation tube, including a nasopharyngeal tube body with an inner cavity, and the tube wall of the nasopharyngeal tube body is provided with an oxygen channel and a carbon dioxide channel that penetrate along the extension direction of the nasopharyngeal tube body, and the oxygen channel and the carbon dioxide channel are independently arranged; one end of the oxygen channel is connected to an oxygen connecting pipe, and one end of the carbon dioxide channel is connected to a carbon dioxide connecting pipe. The oxygen channel opening of this technical solution is located at the front end of the carbon dioxide channel opening and is located inside the nasopharyngeal ventilation tube. The oxygen in the oxygen channel will mix with the end-tidal gas before the carbon dioxide enters the carbon dioxide channel, thereby causing deviations in the end-tidal carbon dioxide concentration detection results. Utility Model Content

[0006] In order to overcome the problems in the prior art that the patient end of the traditional nasal oxygen inhalation tube can only be placed at the patient's nostrils, the tongue is often prone to fall back in comatose patients or patients who need to be sedated with drugs, causing upper respiratory tract obstruction; the oxygen channel port is located at the front end of the carbon dioxide channel port and is located in the nasopharyngeal ventilation tube, and the oxygen in the oxygen channel will mix with the end-tidal gas before the carbon dioxide enters the carbon dioxide channel, so that the end-tidal carbon dioxide concentration detection result will be biased, the utility model provides a nasal oxygen tube that prevents tongue fall and can detect end-tidal carbon dioxide, including:

[0007] The nasal oxygen cannula comprises an oxygen supply tube body and a nasal plug and an oxygen source interface respectively arranged at two ends of the oxygen supply tube body;

[0008] The carbon dioxide detection unit includes a ventilation tube and a carbon dioxide tube. The ventilation tube is sleeved on the nasal plug. One end of the carbon dioxide tube is arranged in the ventilation tube. A trumpet-shaped sampling head is installed at the end of the carbon dioxide tube close to the ventilation tube, and the end of the sampling head close to the carbon dioxide tube has a small opening. The end of the carbon dioxide tube away from the sampling head passes through the side wall of the ventilation tube and is provided with a three-way connecting valve. The other two outlets of the three-way connecting valve are respectively provided with a carbon dioxide monitor interface and a carbon dioxide sampling tube interface.

[0009] The ventilation tube set on the nasal plug can provide deep oxygen supply to the patient in the nasopharynx. The ventilation tube is inserted through the nostrils, over the root of the patient's tongue to the respiratory tract opening, and oxygen is delivered to the patient's respiratory tract through the nasal oxygen tube. The supporting effect of the ventilation tube allows the obstructed respiratory tract to open a certain gas delivery channel, thereby reducing the occurrence of hypoxemia; at the same time, through the cooperation of the carbon dioxide tube set in the ventilation tube and the sampling head connected to the carbon dioxide tube set outside the port in the ventilation tube, the end-tidal carbon dioxide sampling port and the nasal oxygen tube oxygen supply port can be separated, thereby avoiding the influence of oxygen supply on the carbon dioxide concentration in the exhaled air, thereby improving the accuracy of the end-tidal carbon dioxide detection results; in addition, through the three-way valve set at the end of the carbon dioxide tube away from the ventilation tube and the carbon dioxide monitor interface and the carbon dioxide sampling tube interface set on the other two openings of the three-way valve, different models of end-tidal carbon dioxide detectors can be adapted.

[0010] Preferably, the ventilating tube is a nasopharyngeal ventilating tube, and one end of the ventilating tube close to the sampling head is an inner port, and the inner port is divided into an oxygen port and a carbon dioxide port by a carbon dioxide tube. The nasopharyngeal ventilating tube is more in line with the shape of the human nasal cavity, improving the comfort of the patient.

[0011] Preferably, the sampling head comprises a base and a sampling tube connected to the base;

[0012] The base is in the shape of a hollow trumpet, the end with a small opening of the base is connected to the carbon dioxide port, and the end with a large opening of the base is a circle with the same central axis as the inner port and the same outer diameter;

[0013] The sampling tube is arranged at the end with the larger opening of the base, and the sampling tube and the inner port are arranged coaxially, and the outer diameter of the sampling tube is equal to the diameter of the end with the larger opening of the base. The sampling head is used to separate the carbon dioxide sampling port from the oxygen supply outlet to prevent the oxygen supply from affecting the carbon dioxide concentration of the exhaled breath; in addition, the trumpet-shaped design and the sampling tube are used to increase the range of exhaled breath collection.

[0014] Preferably, a plurality of collecting holes are provided on the side wall of the sampling tube to enhance the sampling range of exhaled air and reduce the error of end-tidal carbon dioxide concentration detection.

[0015] Preferably, the ventilation tube and the sampling head are both made of elastic materials, so that the ventilation tube and the sampling head are soft, fit the nasal cavity better and reduce damage to the human body during use.

[0016] Preferably, the ventilation tube and the sampling head are made of rubber or silicone. Silicone and rubber have good flexibility, are non-toxic and stable, are resistant to high temperatures, are easy to clean, and are reusable, thus reducing costs.

[0017] Preferably, both the interface of the carbon dioxide monitor and the interface of the carbon dioxide sampling tube are provided with a detachable cover to prevent debris from entering the carbon dioxide tube when not in use and affecting the use and health safety of the equipment.

[0018] Preferably, an annular wearing tube is provided at one end of the oxygen supply tube body away from the oxygen source interface, the wearing tube is connected to the oxygen supply tube body, the nasal plug is arranged on the wearing tube at the farthest position from the oxygen supply tube body, and the nasal oxygen tube is fixed to the patient's head through the wearing tube.

[0019] Preferably, a fixing ring that can move along the length direction of the central axis of the wearing tube is sleeved on the wearing tube, and two holes that penetrate the fixing ring are arranged on the side wall of the fixing ring, and the inner diameter of the holes is equal to the outer diameter of the wearing tube. The wearing tube is installed in the holes, and the fixing ring can adjust the size of the wearing ring to adapt to patients of different body shapes and better fix the nasal plug in the patient's nostrils.

[0020] Preferably, there are two nasal plugs, the ventilation tube is set on the outer wall of one of the nasal plugs, the nasal plugs are symmetrical about the central axis of the oxygen supply tube body and the distance between the central axes of the two nasal plugs is 1 to 2 cm, so that oxygen can be better supplied to the patient through the two nasal plugs.

[0021] Beneficial effects:

[0022] The beneficial effects produced by adopting the technical solution of the utility model are as follows:

[0023] (1) The ventilation tube installed on the nasal plug can provide deep oxygen supply to the patient in the nasopharynx. The ventilation tube is inserted through the nostrils, over the root of the patient's tongue to the respiratory tract opening. Oxygen is delivered to the patient's respiratory tract through the nasal oxygen tube. The support of the ventilation tube allows the obstructed respiratory tract to open a certain gas delivery channel, thereby reducing the occurrence of hypoxemia. At the same time, the carbon dioxide tube installed in the ventilation tube and the sampling head installed outside the port in the ventilation tube and connected to the carbon dioxide tube can be used to separate the end-tidal carbon dioxide sampling port from the nasal oxygen tube oxygen supply port, thereby avoiding the influence of oxygen supply on the carbon dioxide concentration in the exhaled air, thereby improving the accuracy of the end-tidal carbon dioxide detection results.

[0024] (2) Different models of end-tidal carbon dioxide detectors can be adapted by means of a three-way valve disposed at one end of the carbon dioxide tube away from the ventilation tube and a carbon dioxide monitor interface and a carbon dioxide sampling tube interface disposed at the other two openings of the three-way valve.

[0025] (3) The nasal oxygen tube can be fixed on the patient's head through the ring-shaped wearing tube at one end of the nasal oxygen tube; and the size of the wearing ring can be adjusted by cooperating with the fixing ring arranged on the wearing tube to adapt to patients of different body shapes and better fix the nasal plug at the patient's nostrils. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the overall structure of a nasal oxygen tube that can prevent tongue drop and detect end-tidal carbon dioxide in the utility model;

[0028] Figure 2 It is a schematic diagram of a partially enlarged structure of a nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide of the utility model;

[0029] Figure 3 This is a partial enlarged structural diagram of the carbon dioxide monitor interface of a nasal oxygen tube that can prevent tongue drop and detect end-tidal carbon dioxide in the utility model;

[0030] Figure 4 The utility model is a schematic diagram of a fixing ring structure of a nasal oxygen tube which can prevent tongue falling and detect end-tidal carbon dioxide.

[0031] In the figure: 1. Oxygen supply tube body; 2. Nasal plug; 3. Oxygen source interface; 4. Ventilation tube; 5. Carbon dioxide tube; 6. Three-way connecting valve; 7. Carbon dioxide monitor interface; 8. Carbon dioxide sampling tube interface; 9. Wearing tube; 10. Fixing ring; 11. Carbon dioxide port; 12. Oxygen port; 13. Sampling head; 14. Base; 15. Sampling tube; 16. Collection hole; 17. Cover; 18. Hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] This embodiment can provide deep oxygen supply to the patient in the nasopharynx through the ventilation tube set on the nasal obstruction. The ventilation tube is inserted through the nostrils, over the root of the patient's tongue to the respiratory tract opening, and oxygen is delivered to the patient's respiratory tract through the nasal oxygen tube. The support of the ventilation tube allows the obstructed respiratory tract to open a certain gas delivery channel, thereby reducing the occurrence of hypoxemia; at the same time, through the cooperation of the carbon dioxide tube set in the ventilation tube and the sampling head connected to the carbon dioxide tube set outside the port in the ventilation tube, the end-tidal carbon dioxide sampling port and the nasal oxygen tube oxygen supply port can be separated, thereby avoiding the influence of oxygen supply on the carbon dioxide concentration in the exhaled air, thereby improving the accuracy of the end-tidal carbon dioxide detection results; in addition, through the three-way valve set at the end of the carbon dioxide tube away from the ventilation tube and the carbon dioxide monitor interface and the carbon dioxide sampling tube interface set on the other two openings of the three-way valve, different models of end-tidal carbon dioxide detectors can be adapted. The specific implementation methods are as follows:

[0034] like Figures 1 to 4 As shown, a nasal oxygen tube capable of preventing tongue drop and detecting end-tidal carbon dioxide comprises:

[0035] The nasal oxygen tube comprises an oxygen supply tube body 1 and a nasal plug 2 and an oxygen source interface 3 respectively arranged at two ends of the oxygen supply tube body 1;

[0036] The carbon dioxide detection unit includes a ventilation tube 4 and a carbon dioxide tube 5. The ventilation tube 4 is sleeved on the nasal plug 2. One end of the carbon dioxide tube 5 is arranged in the ventilation tube 4. A trumpet-shaped sampling head 13 is installed at the end of the carbon dioxide tube 5 close to the ventilation tube 4, and the end of the sampling head 13 close to the carbon dioxide tube 5 has a small opening. The end of the carbon dioxide tube 5 away from the sampling head 13 passes through the side wall of the ventilation tube 4 and is provided with a three-way connecting valve 6. The other two outlets of the three-way connecting valve 6 are respectively provided with a carbon dioxide monitor interface 7 and a carbon dioxide sampling tube interface 8.

[0037] The ventilation tube 4 arranged on the nasal plug 2 can provide deep oxygen supply to the patient in the nasopharynx. The ventilation tube 4 is inserted through the nostrils, over the root of the patient's tongue to reach the opening of the respiratory tract. Oxygen is delivered to the patient's respiratory tract through the nasal oxygen tube. The supporting effect of the ventilation tube 4 allows the obstructed respiratory tract to open a certain gas delivery channel, thereby reducing the occurrence of hypoxemia. At the same time, through the cooperation of the carbon dioxide tube 5 arranged in the ventilation tube 4 and the sampling head 13 arranged outside the inner port of the ventilation tube 4 and connected to the carbon dioxide tube 5, the end-tidal carbon dioxide sampling port and the nasal oxygen tube oxygen supply port can be separated, thereby avoiding the influence of oxygen supply on the carbon dioxide concentration in the exhaled air, and improving the accuracy of the end-tidal carbon dioxide detection result.

[0038] Specifically, the ventilation tube 4 is a nasopharyngeal ventilation tube 4, and one end of the ventilation tube 4 close to the sampling head 13 is an inner port, which is divided into an oxygen port 12 and a carbon dioxide port 11 by the carbon dioxide tube 5. The nasopharyngeal ventilation tube 4 is more in line with the shape of the human nasal cavity, improving the comfort of the patient.

[0039] Specifically, the sampling head 13 includes a base 14 and a sampling tube 15 connected to the base 14;

[0040] The base 14 is in the shape of a hollow trumpet, the end of the base 14 with a small opening is connected to the carbon dioxide port 11, and the end of the base 14 with a large opening is a circle with the same central axis as the inner port and the same outer diameter;

[0041] The sampling tube 15 is arranged at the end with the larger opening of the base 14. The sampling tube 15 is arranged coaxially with the inner port and the outer diameter of the sampling tube 15 is equal to the diameter of the end with the larger opening of the base 14. The sampling head 13 separates the carbon dioxide sampling port from the oxygen supply outlet to prevent the oxygen supply from affecting the carbon dioxide concentration of the exhaled breath; in addition, the trumpet-shaped design and the sampling tube 15 increase the range of exhaled breath collection.

[0042] Specifically, a plurality of collecting holes 16 are provided on the side wall of the sampling tube 15 to increase the sampling range of the exhaled air and reduce the error of the end-tidal carbon dioxide concentration detection.

[0043] Specifically, the ventilation tube 4 and the sampling head 13 are both made of elastic material, so that the ventilation tube 4 and the sampling head 13 are soft, fit the nasal cavity better and reduce damage to the human body during use.

[0044] Specifically, the material of the ventilation tube 4 and the sampling head 13 is rubber or silicone. Silicone and rubber have good flexibility, are non-toxic and stable, are resistant to high temperatures, are easy to clean, and can be reused, thereby reducing costs.

[0045] Specifically, a detachable cover 17 is provided on the carbon dioxide monitor interface 7 and the carbon dioxide sampling tube interface 8 to prevent debris from entering the carbon dioxide tube 5 when not in use and affecting the use and health safety of the equipment.

[0046] Specifically, an annular wearing tube 9 is provided at one end of the oxygen supply tube body 1 away from the oxygen source interface 3, the wearing tube 9 is connected to the oxygen supply tube body 1, the nasal plug 2 is arranged on the wearing tube 9 at the farthest position from the oxygen supply tube body 1, and the nasal oxygen tube is fixed to the patient's head through the wearing tube 9.

[0047] Specifically, a fixing ring 10 is sleeved on the wearing tube 9 and can move along the length direction of the central axis of the wearing tube 9. Two holes 18 penetrating the fixing ring 10 are arranged on the side wall of the fixing ring 10. The inner diameter of the hole 18 is equal to the outer diameter of the wearing tube 9. The wearing tube 9 is installed in the hole 18. The fixing ring 10 can adjust the size of the wearing ring to adapt to patients of different body shapes and better fix the nasal plug 2 in the patient's nostrils.

[0048] Specifically, there are two nasal plugs 2, and the ventilation tube 4 is sleeved on the outer wall of one of the nasal plugs 2. The nasal plugs 2 are symmetrical about the central axis of the oxygen supply tube body 1 and the distance between the central axes of the two nasal plugs 2 is 1 to 2 cm. The two nasal plugs 2 can better supply oxygen to the patient.

[0049] Working principle: Connect the oxygen source interface of the nasal oxygen cannula to the oxygen source, select the carbon dioxide monitor interface or the carbon dioxide sampling tube interface according to the interface type of the carbon dioxide detector, and connect the carbon dioxide tube to the carbon dioxide detector through the cooperation of the three-way connecting valve. Insert the ventilation tube through the nostril. The concave surface of the curved part faces the nasal septum cartilage, and insert it backward along the parallel surface of the bottom of the nostril until the tail end reaches the outer opening of the nostril. If there is resistance, it can be rotated slightly and slowly entered. After insertion, the catheter head should be above the level of the epiglottis. Then pass the wearing ring behind the patient's ear and fix the nasal oxygen cannula on the patient's head by adjusting the position of the fixing ring.

[0050] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A nasal oxygen tube that prevents tongue drop and can detect end-tidal carbon dioxide, characterized in that: include: A nasal oxygen tube comprises an oxygen supply tube body (1) and a nasal plug (2) and an oxygen source interface (3) respectively arranged at two ends of the oxygen supply tube body (1); A carbon dioxide detection unit comprises a ventilation tube (4) and a carbon dioxide tube (5), wherein the ventilation tube (4) is sleeved on the nasal plug (2), one end of the carbon dioxide tube (5) is arranged in the ventilation tube (4), a trumpet-shaped sampling head (13) is installed at the end of the carbon dioxide tube (5) close to the ventilation tube (4), and the end of the sampling head (13) close to the carbon dioxide tube (5) has a small opening, and the end of the carbon dioxide tube (5) away from the sampling head (13) passes through the side wall of the ventilation tube (4) and is provided with a three-way connecting valve (6), and the other two outlets of the three-way connecting valve (6) are respectively provided with a carbon dioxide monitor interface (7) and a carbon dioxide sampling tube interface (8).

2. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 1, characterized in that: The ventilation tube (4) is a nasopharyngeal ventilation tube, and one end of the ventilation tube (4) close to the sampling head (13) is an inner port, and the inner port is divided into an oxygen port (12) and a carbon dioxide port (11) by the carbon dioxide tube (5).

3. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 2, characterized in that: The sampling head (13) comprises a base (14) and a sampling tube (15) connected to the base (14); The base (14) is in the shape of a hollow trumpet, the end of the base (14) with a smaller opening is connected to the carbon dioxide port (11), and the end of the base (14) with a larger opening is in the shape of a circle having the same central axis as the inner port and an equal outer diameter; The sampling tube (15) is arranged at the end of the base (14) with a larger opening. The sampling tube (15) and the inner port are arranged coaxially and the outer diameter of the sampling tube (15) is equal to the diameter of the end of the base (14) with a larger opening.

4. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 3, characterized in that: A plurality of collecting holes (16) are arranged on the side wall of the sampling tube (15).

5. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 1, characterized in that: The ventilation tube (4) and the sampling head (13) are both made of elastic materials.

6. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 5, characterized in that: The material of the ventilation tube (4) and the sampling head (13) is rubber or silicone.

7. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 1, characterized in that: The carbon dioxide monitor interface (7) and the carbon dioxide sampling tube interface (8) are both provided with a detachable cover (17).

8. The nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 1, characterized in that: An annular wearing tube (9) is arranged at one end of the oxygen supply tube body (1) away from the oxygen source interface (3); the wearing tube (9) is connected to the oxygen supply tube body (1); and the nasal plug (2) is arranged on the wearing tube (9) at a position farthest from the oxygen supply tube body (1).

9. A nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 8, characterized in that: The wearing tube (9) is sleeved with a fixing ring (10) which can move along the length direction of the central axis of the wearing tube (9); the side wall of the fixing ring (10) is provided with two holes (18) penetrating the fixing ring (10); the inner diameter of the holes (18) is equal to the outer diameter of the wearing tube (9); and the wearing tube (9) is installed in the holes (18).

10. The nasal oxygen tube for preventing tongue drop and detecting end-tidal carbon dioxide according to claim 1, characterized in that: The number of the nasal plugs (2) is two, the ventilation tube (4) is sleeved on the outer wall of one of the nasal plugs (2), the nasal plugs (2) are symmetrical about the central axis of the oxygen supply tube body (1), and the distance between the central axes of the two nasal plugs (2) is 1 to 2 cm.

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