End-expiratory carbon dioxide collection nasal oxygen cannula with filter
By introducing an air filter into the nasal oxygen cannula, the infection risk problem caused by the lack of filtering function of the existing nasal oxygen cannula is solved, the pollutants in the gas are effectively filtered, and the monitoring accuracy and patient comfort are improved.
Patent Information
- Application Number
- CN202422303985.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-21
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-09-21
AI Technical Summary
Existing carbon dioxide monitoring nasal oxygen tubes are not equipped with filters, which can easily lead to infection sources carried by patients or infection sources in carbon dioxide monitors, increasing the risk of medical accidents.
A nasal oxygen tube for collecting end-tidal carbon dioxide with an air filter is designed. Two isolated filter chambers are set in the air filter. The filter chambers are filled with filter media to filter out pollutants such as particles, bacteria, and viruses in the gas to prevent them from entering the patient's respiratory tract or carbon dioxide monitor.
It effectively prevents pollutants from entering the patient's respiratory tract and carbon dioxide monitor, reduces the risk of infection, improves the accuracy of monitoring carbon dioxide concentration, and enhances patient comfort.
Smart Images
Figure CN223350201U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a nasal oxygen tube for collecting end-tidal carbon dioxide with a filter. Background Art
[0002] End-tidal carbon dioxide monitoring, a relatively new non-invasive monitoring technology, is highly sensitive and can monitor not only ventilation but also circulatory function and pulmonary blood flow. This enables continuous, quantitative bedside monitoring of patients and has become an indispensable routine monitoring method for anesthesia. Clinical anesthesia involves a wide range of patients. Whether for general patients or critically ill patients, end-tidal carbon dioxide monitoring can timely and accurately detect unexpected and serious complications, thereby avoiding the occurrence of severe hypoxic damage. It can greatly improve the safety of surgical anesthesia, benefit patients, and has practical significance for judging the progression of the disease.
[0003] The existing carbon dioxide monitoring nasal oxygen tube is not equipped with a filter, and the carbon dioxide monitoring nasal oxygen tube is directly connected to the carbon dioxide monitor. Whether the patient carries the source of infection or the carbon dioxide monitor has the source of infection, it is easy to cause mutual infection, and then cause unnecessary medical accidents in the future. Utility Model Content
[0004] The purpose of the utility model is to provide a nasal oxygen tube for collecting end-tidal carbon dioxide with a filter to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide, comprising a front nasal cannula, an isolation block is provided in the middle of the front nasal cannula, two nasal plug heads are provided through the front nasal cannula, the two nasal plug heads are divided into an oxygen inhalation port and an exhalation port, the two nasal plug heads are respectively arranged at two ends of the isolation block and are arranged opposite to each other, one end of the front nasal cannula with the oxygen inhalation port is connected to a first conduit, and the other end of the front nasal cannula with the exhalation port is connected to a second conduit, an air filter is connected between the first conduit and the second conduit, one end of the first conduit is connected to an oxygen source connector, and one end of the second conduit is connected to an end-tidal carbon dioxide Carbon connector; the air filter includes a shell, a partition plate is provided at the center of the shell, the partition plate separates the interior of the shell into two separate filter chambers, the filter chamber of the air filter is filled with filter medium, and an air inlet connection port and an air outlet connection port are respectively provided at both ends of the filter chamber, and a filter screen is provided at the side of the air inlet connection port and the air outlet connection port facing the inside of the filter chamber, and the air inlet connection ports and the air outlet connection ports of the filter chambers on both sides are arranged oppositely, that is, one end of the connecting duct of the air filter is respectively provided with an air inlet connection port and an air outlet connection port, and the gas forms a one-way flow between the same chamber and the connection ports on both sides, and the order is first in and last out.
[0006] Preferably, ear hooks are provided on the first and second tubes on a side close to the front nasal tube, and the ear hooks are relatively arranged with reference to the front nasal tube.
[0007] Preferably, the outer sleeves of the first conduit and the second conduit are provided with adjustment rings, and the adjustment rings are arranged between the ear hook and the air filter.
[0008] Preferably, the air filter faces the connection port at one end of the front nasal tube, the air inlet connection port is connected to the second duct, and the air outlet connection port is connected to the second duct; conversely, the air filter is away from the connection port at one end of the front nasal tube, the air inlet connection port is connected to the first duct, and the air outlet connection port is connected to the second duct.
[0009] Preferably, the air inlet connection port is different from the air outlet connection port in that the outer layer is provided with a color coating.
[0010] Preferably, a humidity filter is further provided on the first conduit, and the moisture filter is provided on the first conduit between the air filter and the prenasal tube; a moisture filter is further provided on the second conduit, and the moisture filter is provided on the second conduit between the air filter and the end-tidal carbon dioxide connector.
[0011] Compared with the prior art, the present invention has the following beneficial effects: the present invention is provided with an air filter, wherein two isolated filter chambers are provided within the air filter, and the connectors at both ends of the filter chambers are connected to a conduit, so that gas circulates unidirectionally within the filter chambers, processing gas in the exhalation and inhalation phases respectively. The filter medium within the filter chambers filters out pollutants such as particles, bacteria, and viruses in the gas, thereby preventing pollutants from entering the patient's respiratory tract and, on the one hand, preventing exhaled gas containing pathogens from entering the carbon dioxide monitor, thereby protecting the monitor from contamination. The present invention also filters out interfering substances in the exhaled gas, thereby improving the accuracy of the monitored carbon dioxide concentration. The present invention is provided with a humidity filter on the first pipe, so that oxygen, after being filtered by the air filter, also passes through the humidity filter before entering the patient's respiratory tract. The humidity filter maintains the humidity of the incoming gas, thereby preventing dryness of the respiratory tract, reducing discomfort and complications caused by dryness, and moistening the gas to improve patient comfort. The present invention is provided with a moisture filter on the second pipe, so that the patient's exhaled gas, after passing through the air filter, passes through the moisture filter. The moisture filter blocks water vapor in the exhaled gas, thereby preventing moisture from entering the carbon dioxide monitor and causing equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the air filter component of the utility model.
[0014] In the figure: 1. First catheter; 2. Second catheter; 3. Prenasal tube; 4. Isolation block; 5. Oxygen inhalation port; 6. Exhalation port; 7. Humidity filter; 8. Moisture filter; 9. Oxygen source connector; 10. End-tidal carbon dioxide connector; 11. Adjustment ring; 12. Ear hook; 13. Air filter; 131. Housing; 132. Partition plate; 133. Filter chamber; 134. Filter medium; 135. Outlet connector; 136. Inlet connector; 137. Filter screen. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0016] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0017] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0018] See also Figure 1-2The utility model provides a technical solution: a nasal oxygen cannula for collecting end-tidal carbon dioxide with a filter, comprising a front nasal tube 3, an isolation block 4 is provided in the middle of the front nasal tube 3, two nasal plugs are provided through the front nasal tube 3, the two nasal plugs are divided into an oxygen inhalation port 5 and an exhalation port 6, the two nasal plugs are respectively arranged at two ends of the isolation block 4 and are arranged opposite to each other, one end of the front nasal tube 3 with the oxygen inhalation port 5 is connected to the first conduit 1, and one end of the front nasal tube 3 with the exhalation port 6 is connected to the second conduit 2, an air filter 13 is connected between the first conduit 1 and the second conduit 2, one end of the first conduit 1 is connected to the oxygen source connector 9, and one end of the second conduit 2 is connected to the end-tidal carbon dioxide connector 10; the air filter 13 includes a shell 131, and the shell A partition plate 132 is provided at the center of 131, and the partition plate 132 isolates the interior of the shell 131 into two separate filter chambers 133. The filter chamber 133 of the air filter 13 is filled with a filter medium 134, and an air inlet connection port 136 and an air outlet connection port 135 are respectively provided at both ends of the filter chamber 133. A filter mesh 137 is provided on the side of the air inlet connection port 136 and the air outlet connection port 135 facing the inside of the filter chamber 133. The air inlet connection port 136 and the air outlet connection port 135 of the filter chambers 133 on both sides are arranged oppositely, that is, one end of the connecting duct of the air filter 13 is respectively provided with an air inlet connection port 136 and an air outlet connection port 135, and the gas forms a one-way flow between the same chamber and the connection ports on both sides, and the order is first in and last out.
[0019] Furthermore, an ear hook 12 is provided on one side of the first tube 1 and the second tube 2 close to the front nasal tube 3. The ear hook 12 is relatively arranged with reference to the front nasal tube 3, and the ear hook 12 facilitates fixing the entire nasal oxygen tube.
[0020] Furthermore, an adjustment ring 11 is provided on the outer sleeve of the first conduit 1 and the second conduit 2. The adjustment ring 11 is arranged between the ear hook 12 and the air filter 13. The adjustment ring 11 facilitates the convergence of the two conduits to avoid tangling.
[0021] Furthermore, the air filter 13 faces the connection port at one end of the prenasal tube 3, the air inlet connection port 136 is connected to the second duct 2, and the air outlet connection port 135 is connected to the second duct 2; conversely, the air filter 13 is away from the connection port at one end of the prenasal tube 3, the air inlet connection port 136 is connected to the first duct 1, and the air outlet connection port 135 is connected to the second duct 2.
[0022] Furthermore, the air inlet connection port 136 is different from the air outlet connection port 135 in that the outer layer thereof is provided with a color coating.
[0023] Furthermore, a humidity filter 7 is provided on the first conduit 1, and a moisture filter 8 is provided on the first conduit 1 between the air filter 13 and the prenasal tube 3; a moisture filter 8 is also provided on the second conduit 2, and the moisture filter 8 is provided on the second conduit 2 between the air filter 13 and the end-tidal carbon dioxide connector 10.
[0024] Working principle: The utility model provides a nasal oxygen tube for collecting end-tidal carbon dioxide with a filter, comprising a front nasal tube 3, an isolation block 4 is provided in the middle of the front nasal tube 3, two nasal plug heads are provided through the front nasal tube 3, the two nasal plug heads are divided into an oxygen inhalation port 5 and an exhalation port 6, the two nasal plug heads are respectively arranged at both ends of the isolation block 4 and are arranged opposite to each other, the isolation block 4 divides the front nasal tube 3 into cavities isolated on both sides, so that oxygen inhalation and exhalation are not affected, one end of the front nasal tube 3 with the oxygen inhalation port 5 is connected to the first conduit 1, and one end of the front nasal tube 3 with the exhalation port 6 is connected to the second conduit 2, an air filter 13 is connected between the first conduit 1 and the second conduit 2, and one end of the first conduit 1 is connected to an oxygen source Connector 9, one end of the second conduit 2 is connected to the end-tidal carbon dioxide connector 10; the air filter 13 includes a shell 131, a partition plate 132 is provided at the center of the shell 131, and the partition plate 132 isolates the interior of the shell 131 into two separate filter chambers 133. The filter chamber 133 of the air filter 13 is filled with a filter medium 134, and the two ends of the filter chamber 133 are respectively provided with an air inlet connection port 136 and an air outlet connection port 135. A filter screen 137 is provided on one side of the air inlet connection port 136 and the air outlet connection port 135 facing the inside of the filter chamber 133, and the air inlet connection port 136 and the air outlet connection port 135 on both sides of the filter chamber 133 are opposite to each other. The arrangement is that one end of the connecting conduit of the air filter 13 is respectively provided with an air inlet connection port 136 and an air outlet connection port 135, and the gas forms a one-way flow between the same chamber and the connection ports on both sides, and the order is first in and last out; when used, the front nasal tube 3 is inserted into the nostril, and then the ear hook 12 is hung on the ear to fix the nasal oxygen tube, the end-tidal carbon dioxide connector 10 is connected to the carbon dioxide monitor, and the oxygen source connector 9 is connected to the feeding device. The utility model is provided with an air filter 13, and two isolated filter chambers 133 are provided in the air filter 13. The connection ports at both ends of the filter chamber 133 are connected to the conduits, and the gas circulates one-way in the filter chamber 133 to process the gas in the exhalation and inhalation stages respectively. The filter medium 134 in the filter chamber 133 filters out pollutants such as particles, bacteria, and viruses in the gas, preventing pollutants from entering the patient's respiratory tract. On the other hand, it prevents exhaled gas containing pathogens from entering the carbon dioxide monitor, protecting the monitor from contamination. At the same time, it filters out interfering substances in the exhaled gas and improves the accuracy of the monitored carbon dioxide concentration. The present invention sets a humidity filter 7 on the first pipe. After being filtered by the air filter 13, the oxygen also passes through the humidity filter 7 before entering the patient's respiratory tract. The humidity filter 7 maintains the humidity of the incoming gas, preventing dryness of the respiratory tract, reducing discomfort and complications caused by dryness, and moistening the gas to improve the patient's comfort.The utility model sets a moisture filter 8 on the second pipe. The patient's exhaled gas passes through the air filter 13 and then through the moisture filter 8. The moisture filter 8 blocks the water vapor in the exhaled gas, preventing moisture from entering the carbon dioxide monitor and causing equipment malfunction.
[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A nasal oxygen cannula for collecting end-tidal carbon dioxide with a filter, characterized by: The invention comprises a front nasal tube (3), wherein an isolation block (4) is provided in the middle of the front nasal tube (3), and two nasal plugs are provided through the front nasal tube (3), and the two nasal plugs are divided into an oxygen inhalation port (5) and an exhalation port (6). The two nasal plugs are respectively arranged at two ends of the isolation block (4) and are arranged opposite to each other. One end of the front nasal tube (3) provided with the oxygen inhalation port (5) is connected to the first conduit (1), and one end of the front nasal tube (3) provided with the exhalation port (6) is connected to the second conduit (2). An air filter (13) is connected between the first conduit (1) and the second conduit (2), one end of the first conduit (1) is connected to the oxygen source connector (9), and one end of the second conduit (2) is connected to the end-tidal carbon dioxide connector (10); the air filter (13) comprises a shell (131), and a partition plate ( 132), the partition plate (132) separates the interior of the housing (131) into two separate filter chambers (133), the filter chamber (133) of the air filter (13) is filled with a filter medium (134), and an air inlet connection port (136) and an air outlet connection port (135) are respectively provided at both ends of the filter chamber (133), and a filter screen (137) is provided on one side of the air inlet connection port (136) and the air outlet connection port (135) facing the inside of the filter chamber (133), and the air inlet connection port (136) and the air outlet connection port (135) of the filter chambers (133) on both sides are arranged oppositely, that is, one end of the connecting conduit of the air filter (13) is respectively provided with an air inlet connection port (136) and an air outlet connection port (135), and the gas forms a one-way flow between the same chamber and the connection ports on both sides, and the order is first in and last out.
2. The nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide according to claim 1, characterized in that: An ear hook (12) is provided on one side of the first catheter (1) and the second catheter (2) close to the front nasal tube (3), and the ear hook (12) is relatively arranged with the front nasal tube (3) as a reference.
3. The nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide according to claim 1, characterized in that: The outer sleeves of the first conduit (1) and the second conduit (2) are provided with adjustment rings (11), and the adjustment rings (11) are arranged between the ear hook (12) and the air filter (13).
4. The nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide according to claim 1, characterized in that: The air filter (13) faces the connection port at one end of the front nasal tube (3), the air inlet connection port (136) is connected to the second conduit (2), and the air outlet connection port (135) is connected to the second conduit (2); in contrast, the air filter (13) faces the connection port at one end of the front nasal tube (3), the air inlet connection port (136) is connected to the first conduit (1), and the air outlet connection port (135) is connected to the second conduit (2).
5. The nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide according to claim 1, characterized in that: The air inlet connection port (136) is different from the air outlet connection port (135) in that the outer layer is provided with a color coating.
6. The nasal oxygen cannula with a filter for collecting end-tidal carbon dioxide according to claim 1, characterized in that: The first conduit (1) is further provided with a humidity filter (7), and the moisture filter (8) is provided on the first conduit (1) between the air filter (13) and the prenasal tube (3); the second conduit (2) is further provided with a moisture filter (8), and the moisture filter (8) is provided on the second conduit (2) between the air filter (13) and the end-tidal carbon dioxide connector (10).