Nasal catheter capable of simultaneously supplying oxygen and monitoring end-expiratory carbon dioxide

Abstract

The utility model belongs to the technical field of medical instruments, and relates to a nasal catheter capable of simultaneously supplying oxygen and monitoring end-expiratory carbon dioxide, which comprises a nasal suction tube, an inspiration nasal tube, a third catheter, an expiration nasal tube and a second catheter communicated with the nasal suction tube, and the second catheter is connected with the third catheter through an adjusting slider. The adjusting sliding block is arranged on the second catheter and the third catheter in a sliding and penetrating mode, the second catheter is further communicated with a branch pipe, the branch pipe is provided with a switch, and the branch pipe is connected with an expiration oral cavity pipe; the second guide pipe is detachably communicated with a first guide pipe through a four-way connector, and the third guide pipe is detachably communicated with a fourth guide pipe through a four-way connector. The first conduit is connected with a first air filter and a carbon dioxide detector joint, and the fourth conduit is connected with a second air filter and an oxygen machine joint; grooves are formed in the inner side walls of the fourth guide pipe and the third guide pipe; the end-expiratory carbon dioxide collecting device solves the problem that collection of end-expiratory carbon dioxide cannot be guaranteed, and is suitable for supplying oxygen and monitoring end-expiratory carbon dioxide at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a nasal catheter capable of simultaneously supplying oxygen and monitoring end-tidal carbon dioxide. Background Art

[0002] With the development of modern medicine, clinical anesthesia often requires patients to use nasal cannula to inhale oxygen. However, for some sedated patients, oxygen inhalation alone is not safe enough. It would be much safer if end-tidal carbon dioxide could be monitored while inhaling oxygen, because end-tidal carbon dioxide can be detected when the patient's breathing becomes shallow and weak. Without carbon dioxide monitoring, only blood oxygen saturation monitoring can be used, which often can only be detected when hypoxia occurs. To address the above problems, a Chinese patent (patent publication number: CN 219090649 U) discloses a nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide. The cannula utilizes two independent nasal cannulas, one connected to a feeding machine and the other connected to a carbon dioxide monitor. Both nasal cannulas are connected to air filters to achieve the effects of end-tidal carbon dioxide monitoring and isolation of pathogens. However, the existing technology still has the following problems in actual application:

[0003] 1. The catheter is too long, making it difficult to disassemble and clean it in sections, and it can easily be blocked by nasal excretions, affecting its use.

[0004] 2. Patients usually wrap the two tubes around their ears to facilitate wearing the nasal suction tube, but there is no adjustment and tightening device on the two tubes, so they are easy to fall off when patients wear them.

[0005] 3. End-tidal carbon dioxide can only be collected through a nasal suction tip, and there are few other compensation methods. The collection of end-tidal carbon dioxide cannot be guaranteed, which in turn affects the monitoring effect.

[0006] 4. The oxygen inhalation tube is easily blocked when it is folded or deformed due to pressure, resulting in poor oxygen flow. Utility Model Content

[0007] The utility model aims to provide a nasal cannula for simultaneously supplying oxygen and monitoring end-tidal carbon dioxide, so as to solve the problems in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0009] The basic technical solution provided by the utility model is: a nasal cannula for simultaneously supplying oxygen and monitoring end-tidal carbon dioxide, comprising a nasal suction tube, the interior of which is divided into two independent oxygen inhalation chambers and exhalation chambers;

[0010] The oxygen inhalation chamber is connected to an inhalation nasal tube and a third conduit; the exhalation chamber is connected to an exhalation nasal tube and a second conduit, the second conduit and the third conduit are connected by an adjustment slider, the adjustment slider is slidably arranged on the second conduit and the third conduit, the second conduit is also connected to a branch tube, the branch tube is provided with a switch, and the branch tube is connected to an exhalation oral tube; the second conduit is detachably connected to the first conduit through a four-way joint, and the third conduit is detachably connected to the fourth conduit through a four-way joint; the first conduit is connected to a first air filter and a carbon dioxide detector connector for connecting to a carbon dioxide detector, and the fourth conduit is connected to a second air filter and an oxygen machine connector for connecting to an oxygen machine;

[0011] Grooves are provided on the inner side walls of the fourth conduit and the third conduit.

[0012] The principle of the basic technical solution is: when the fourth conduit with grooves and the third conduit are deformed or squeezed, the inner tube walls will not fit completely, that is, an oxygen channel will always remain; oxygen passes through the second air filter to filter out impure particles, and then is delivered to the oxygen inhalation chamber along the third and fourth conduits, and the patient inhales oxygen through the inspiratory nasal cannula; when the patient exhales, carbon dioxide enters the expiratory chamber through the expiratory nasal cannula. When the expiratory nasal cannula or the patient's nasal cavity is blocked, insufficient carbon dioxide can be collected. The sampling airflow can be supplemented by exhaling through the expiratory oral tube. The carbon dioxide passes through the second conduit and the first conduit through the first air filter to filter out impure pathogens and then enters the carbon dioxide monitor.

[0013] The basic technical solution has the following beneficial effects: the carbon dioxide detector connector and the oxygen machine connector facilitate the connection of the present invention to the oxygen machine and the carbon dioxide detector; the first and second filters isolate impurities in the inhaled oxygen to prevent the patient from experiencing respiratory discomfort, and also isolate pathogens in the patient's exhaled air to prevent them from contaminating the carbon dioxide monitor; the four-way connector facilitates the division of the original long catheter into several short, connectable sections, making them easy to disassemble and clean, ensuring hygienic use; the sliding of the adjustment slider allows the second and third catheters to fit more closely to the patient, making them more secure when worn and less likely to slip off the ears; the division of the nasal suction tube into two independent oxygen inhalation chambers and exhalation chambers achieves the functions of simultaneous oxygen supply and end-tidal carbon dioxide monitoring; the use of the exhalation oral tube facilitates timely compensation in the event of insufficient sampling airflow, preventing the monitoring effect from being affected by insufficient sampling airflow; grooves are provided on the inner walls of the third and fourth catheters. When deformed or squeezed, the inner walls of the catheters do not completely fit together, allowing oxygen to pass through, ensuring smooth oxygen supply.

[0014] Preferably, the branch tube is connected to the exhalation oral tube through a flexible tube.

[0015] Through the above arrangement, the hose can facilitate the movement of the expiratory oral tube to prevent its fixation from affecting installation and use. The sleeve connection makes the expiratory oral tube detachable, and it can be removed when sampling airflow compensation is not required, further facilitating use.

[0016] Preferably, the carbon dioxide detector connector, the first air filter, the first conduit, the four-way connector, the adjustment slider, the second conduit, the branch pipe, the switch, the hose, the expiratory oral tube, the expiratory nasal tube, the inspiratory nasal tube, the nasal suction tube, the third conduit, the fourth conduit, the second air filter and the oxygen machine connector are all made of medical grade materials.

[0017] Through the above settings, safe use is ensured and other pollution is avoided.

[0018] Preferably, the carbon dioxide detector connector is a Luer connector.

[0019] Through the above arrangement, the connection is convenient and the production cost is reduced.

[0020] Preferably, a reminder sign is provided at the port of the four-way connector connecting the third conduit and the fourth conduit.

[0021] Through the above arrangement, the probability of wrong connection is reduced, ensuring the normal use of the utility model.

[0022] Preferably, the grooves are four evenly distributed, and their directions are consistent with the directions of the fourth conduit and the third conduit.

[0023] Through the above settings, smooth oxygen flow is further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the groove in the utility model;

[0026] The names of the corresponding symbols in the accompanying drawings are:

[0027] Carbon dioxide detector connector 1, first air filter 2, first conduit 3, four-way connector 4, adjustment slider 5, second conduit 6, branch pipe 7, switch 8, hose 9, expiratory oral tube 10, expiratory nasal tube 11, inspiratory nasal tube 12, nasal suction tube 13, third conduit 14, fourth conduit 15, second air filter 16, oxygen machine connector 17. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0029] like Figure 1 and Figure 2 As shown, a nasal cannula for simultaneously supplying oxygen and monitoring end-tidal carbon dioxide includes a nasal suction tube 13, the interior of the nasal suction tube 13 is divided into two independent oxygen inhalation chambers and exhalation chambers;

[0030] The oxygen inhalation chamber is connected to an inhalation nasal tube 12 and a third conduit 14; the exhalation chamber is connected to an exhalation nasal tube 11 and a second conduit 6, and the second conduit 6 and the third conduit 14 are connected by an adjusting slider 5, and the adjusting slider 5 is slidably arranged on the second conduit 6 and the third conduit 14. The second conduit 6 is also connected to a branch tube 7, and a switch 8 is provided on the branch tube 7, and the branch tube 7 is connected to an exhalation oral tube 10 through a hose 9; the second conduit 6 is detachably connected to the first conduit 3 through a four-way connector 4, and the third conduit 14 is detachably connected to the fourth conduit 15 through the four-way connector 4; the first conduit 3 is connected to a first air filter 2 and a Luer connector for connecting to a carbon dioxide detector, and the fourth conduit 15 is connected to a second air filter 16 and an oxygen machine connector 17 for connecting to an oxygen machine;

[0031] Four evenly distributed grooves are provided on the inner sidewalls of the fourth conduit 15 and the third conduit 14 , and the directions of the grooves are consistent with the directions of the fourth conduit 15 and the third conduit 14 .

[0032] The specific implementation process is as follows:

[0033] Connect the oxygen machine connector 17 to the oxygen machine to start oxygen supply. The oxygen passes through the second air filter 16 to filter out impurities and particles, and then is delivered to the oxygen inhalation chamber along the fourth conduit 15 and the third conduit 14. Then, wrap the second conduit 6 and the third conduit 14 around the patient's ears on both sides, and then insert the expiratory nasal tube 11 and the inspiratory nasal tube 12 of the nasal suction tube 13 into the patient's nostrils. The patient inhales oxygen through the inspiratory nasal tube 12. Slide the adjustment slider 5 to a suitable fixed position, connect the carbon dioxide detector connector 1 to the carbon dioxide monitor, and the two exhaled gases of the patient are discharged. Carbon dioxide enters the exhalation chamber through the expiratory nasal tube 11. When the sampling airflow is sufficient, the switch 8 is closed; when the sampling airflow is insufficient, the switch 8 is opened, and the patient holds the expiratory oral tube 10 in his mouth to compensate for the exhaled airflow. The exhaled carbon dioxide flows along the second conduit 6 and the first conduit 3, is filtered out of the impurities by the first air filter 2, and then enters the carbon dioxide monitor for monitoring; when the pipeline is blocked, the first conduit 3, the second conduit 6, the third conduit 14 and the fourth conduit 15 are removed from the four-way connector 4 for cleaning and dredging. After cleaning, they can be reconnected for continued use.

[0034] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions or features in the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A nasal cannula for simultaneously supplying oxygen and monitoring end-tidal carbon dioxide, characterized by: The invention comprises a nasal suction tube, wherein the interior of the nasal suction tube is divided into two independent oxygen inhalation chambers and exhalation chambers; The oxygen inhalation chamber is connected to an inhalation nasal tube and a third conduit; the exhalation chamber is connected to an exhalation nasal tube and a second conduit, the second conduit and the third conduit are connected by an adjustment slider, the adjustment slider is slidably arranged on the second conduit and the third conduit, the second conduit is also connected to a branch tube, the branch tube is provided with a switch, and the branch tube is connected to an exhalation oral tube; the second conduit is detachably connected to the first conduit through a four-way joint, and the third conduit is detachably connected to the fourth conduit through a four-way joint; the first conduit is connected to a first air filter and a carbon dioxide detector connector for connecting to a carbon dioxide detector, and the fourth conduit is connected to a second air filter and an oxygen machine connector for connecting to an oxygen machine; Grooves are provided on the inner side walls of the fourth conduit and the third conduit.

2. The nasal cannula for simultaneous oxygen supply and end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The branch tube is sleeved with the exhalation oral tube through a flexible pipe.

3. The nasal cannula for simultaneous oxygen supply and end-tidal carbon dioxide monitoring according to claim 2, characterized in that: The carbon dioxide detector connector, the first air filter, the first conduit, the four-way connector, the adjustment slider, the second conduit, the branch pipe, the switch, the hose, the expiratory oral tube, the expiratory nasal tube, the inspiratory nasal tube, the nasal suction tube, the third conduit, the fourth conduit, the second air filter and the oxygen machine connector are all made of medical grade materials.

4. The nasal cannula for simultaneous oxygen supply and end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The carbon dioxide detector connector adopts a Luer connector.

5. The nasal cannula for simultaneous oxygen supply and end-tidal carbon dioxide monitoring according to claim 1, characterized in that: A reminder sign is provided at the port of the four-way connector connecting the third conduit and the fourth conduit.

6. The nasal cannula for simultaneous oxygen supply and end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The grooves are four evenly distributed, and their directions are consistent with those of the fourth conduit and the third conduit.

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