Nasal oxygen cannula with end-tidal carbon dioxide monitoring function

Abstract

The utility model provides a nasal oxygen cannula with end-tidal carbon dioxide monitoring, which comprises an anterior nasal tube, two ports of the anterior nasal tube are respectively connected with an oxygen supply branch tube, far-end ports of the two oxygen supply branch tubes are connected to the same oxygen supply header tube, and one side of the anterior nasal tube corresponding to a nasal cavity of a human body is provided with two nasal plug tubes. An oxygen supply channel and expiration sampling ventilation channels are arranged in the nasal plug tube in parallel, the oxygen supply channel is communicated with the anterior nasal tube, an expiration sampling tube is arranged at the oblique upper position of one side, corresponding to the nasal cavity of the human body, of the anterior nasal tube, the two expiration sampling ventilation channels are converged to the expiration sampling tube, one end of the expiration sampling tube is closed, and the other end of the expiration sampling tube is closed. The other end is connected with the carbon dioxide monitoring conduit. The nasal plug is simple in structure, the oxygen supply channel and the expiration sampling air passage are concentrated in the nasal plug tube, the area of the expiration sampling air passage is smaller than that of the oxygen supply channel, and larger oxygen supply amount is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, in particular to a nasal oxygen tube with end-tidal carbon dioxide monitoring. Background Art

[0002] A nasal oxygen cannula is a medical device used to provide oxygen therapy, including a front nasal cannula, which is equipped with a nasal plug tube. The front nasal cannula is connected to the oxygen supply branch tube and the main supply tube. The function of the nasal oxygen cannula is to deliver oxygen to the patient's respiratory tract to help the patient breathe. In medical clinical monitoring, end-tidal carbon dioxide is a very important physiological parameter, which can simultaneously reflect the patient's pulmonary ventilation function and the patient's blood circulation function and pulmonary blood flow. Therefore, how to improve the existing nasal oxygen cannula, in addition to meeting the patient's oxygen supply needs, to monitor the patient's breathing at the end of tidal carbon dioxide, so as to grasp the patient's basic vital signs.

[0003] At present, some nasal oxygen tubes are equipped with an end-tidal carbon dioxide monitoring sampling structure, which realizes the function of supplying oxygen and monitoring the carbon dioxide concentration in the patient's exhaled gas at the same time. However, the end-tidal carbon dioxide monitoring sampling structure is either too simple, for example, the front nasal tube is divided into an oxygen supply cavity and a sampling cavity by a partition, one of the two nasal plug tubes of the nasal oxygen tube is connected to the oxygen supply cavity to supply oxygen to the patient, and the other nasal plug tube is connected to the sampling cavity and then connected to the monitoring device through a catheter to monitor the end-tidal carbon dioxide of the patient. The nasal oxygen tube of this structure cannot fully guarantee the realization of its oxygen supply and sampling functions. Once one of the patient's nostrils is blocked, it is bound to affect the operation function of the nasal oxygen tube. To solve this problem, it is best to supply oxygen to the patient through both nostrils and sample the patient's exhaled gas through both nostrils. Therefore, some nasal oxygen tubes with an end-tidal carbon dioxide monitoring structure have made corresponding improvements to realize the function of supplying oxygen to both nostrils and sampling the exhaled gas from both nostrils at the same time. However, the structure of the improved nasal oxygen tube is too complicated, and it is found in clinical applications that the oxygen supply and end-tidal carbon dioxide monitoring effects of the improved nasal oxygen tube are not ideal. In addition, the improved nasal oxygen cannula with end-tidal carbon dioxide monitoring structure lacks a limiting structure for the front nasal tube. During use, the front nasal tube sometimes sticks to the patient's nostrils, causing the patient to have difficulty breathing. Utility Model Content

[0004] In view of this, the utility model aims to propose a nasal oxygen cannula with end-tidal carbon dioxide monitoring to simplify the structure of the nasal oxygen cannula, ensure that it is worn in an appropriate position, and have the function of supplying oxygen to the patient through both nostrils at the same time and collecting the gas exhaled by both nostrils of the patient, thereby ensuring the oxygen supply effect of the patient and improving the accuracy of the patient's end-tidal carbon dioxide monitoring.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A nasal oxygen cannula with end-tidal carbon dioxide monitoring comprises a front nasal cannula, two ports of the front nasal cannula are respectively connected to an oxygen supply branch tube, the distal interfaces of the two oxygen supply branch tubes are connected to the same oxygen supply main tube, two nasal plug tubes are arranged on the side of the front nasal cannula corresponding to the human nasal cavity, an oxygen supply channel and an exhaled sampling airway are arranged in parallel in the nasal plug tubes, the oxygen supply channel is connected to the front nasal cannula, an exhaled sampling tube is arranged at an obliquely upper position of the front nasal cannula corresponding to the side of the human nasal cavity, the two exhaled sampling airways merge into the exhaled sampling tube, one end of the exhaled sampling tube is closed, and the other end is connected to a carbon dioxide monitoring catheter.

[0007] Furthermore, the exhaled breath sampling airway is arranged above the oxygen supply channel.

[0008] Furthermore, the cross-sectional area of ​​the exhaled sampling airway is less than 1 / 2 of the cross-sectional area of ​​the oxygen supply channel.

[0009] Furthermore, the exhaled air sampling tube is provided with a positioning baffle piece upwardly corresponding to the columella of the human body.

[0010] Furthermore, the carbon dioxide monitoring catheter is fixed via a first fixing ring and an oxygen supply branch pipe;

[0011] The two oxygen supply branch pipes are matched with a second fixing ring, the second fixing ring is provided with two through holes, and the distal end interfaces of the two oxygen supply branch pipes are connected to the oxygen supply main pipe after each through a through hole.

[0012] Compared with the prior art, the nasal oxygen cannula with end-tidal carbon dioxide monitoring described in the utility model has the following advantages:

[0013] (1) The utility model has a simple structure, and the oxygen supply channel and the exhaled sampling airway are concentrated in the nasal congestion tube. The area of ​​the exhaled sampling airway is smaller than that of the oxygen supply channel, thereby ensuring a larger oxygen supply.

[0014] (2) In the present invention, two exhaled air sampling ducts are combined into an exhaled air sampling tube, and then output to the monitoring device through a carbon dioxide monitoring catheter, so that the critical carbon dioxide monitoring of the patient is more accurate.

[0015] (3) In the present invention, a positioning baffle is provided on the exhaled air sampling tube to limit the position of the front nasal tube, so that a certain distance is left between the front nasal tube and the nostrils, thereby ensuring smooth exhalation of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1This is a schematic diagram of the structure of a nasal oxygen cannula with end-tidal carbon dioxide monitoring described in this embodiment;

[0018] Figure 2 Schematic diagram of the position relationship between the prenasal tube, the exhaled air sampling tube and the nasal obstruction tube in this embodiment.

[0019] Description of reference numerals:

[0020] 1- oxygen supply branch tube; 2- carbon dioxide monitoring catheter; 3- front nasal tube; 4- exhaled breath sampling tube; 5- positioning baffle; 6- nasal plug tube; 7- partition; 8- exhaled breath sampling airway; 9- oxygen supply channel; 10- oxygen supply main pipe; 11- first fixing ring; 12- second fixing ring. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] like Figure 1 As shown, a nasal oxygen cannula with end-tidal carbon dioxide monitoring includes a front nasal tube 3, and the two ports of the front nasal tube 3 are respectively connected to an oxygen supply branch tube 1, and the ports of the two oxygen supply branches 1 away from the front nasal tube 3 are connected to the same oxygen supply main pipe 10, and the oxygen supply main pipe 10 is connected to the oxygen inhalation equipment to provide oxygen for the patient. Two nasal plug tubes 6 are provided on the side of the front nasal tube 3 corresponding to the human nasal cavity, and an exhaled sampling tube 4 is provided at the upper position of the side of the front nasal tube 3 corresponding to the human nasal cavity. After the patient wears it, the exhaled sampling tube 4 is located on the side of the nasal plug tube 6 away from the patient's upper lip; one end of the exhaled sampling tube 4 is closed, and the other end is connected to the carbon dioxide monitoring catheter 2, and the carbon dioxide monitoring catheter 2 is connected to the corresponding end-tidal carbon dioxide monitoring equipment.

[0023] A partition 7 is provided in the nasal tube 6 along the axial direction, and the partition 7 separates the channel of the nasal tube 6 into an oxygen supply channel 9 and an exhaled air sampling channel 8. Figure 2 As shown, the exhaled sampling airway 8 is located above the oxygen supply channel 9, that is, after wearing, the oxygen supply channel 9 is closer to the human oral cavity than the exhaled sampling airway 8; the cross-sectional area of ​​the exhaled sampling airway 8 is smaller than the cross-sectional area of ​​the oxygen supply channel 9. At this time, the nasal oxygen tube has two oxygen supply channels 9 and two exhaled sampling airways 8 corresponding to the two nostrils of the patient, two connected oxygen supply cavities are provided in the front nasal tube 3, and two connected sampling cavities are provided in the exhaled sampling tube 4. The two oxygen supply channels 9 are connected to the two oxygen supply cavities of the front nasal tube 3, and the two exhaled sampling airways 8 are connected to the two sampling cavities of the exhaled sampling tube 4, that is, the two exhaled sampling airways 8 merge into the exhaled sampling tube 4, so as to realize oxygen supply to the patient through the two nostrils at the same time, and then collect the gas exhaled from the two nostrils of the patient for end-tidal carbon dioxide monitoring. Since the gas exhaled by the patient merges into the exhaled sampling tube 4 and is output to the monitoring equipment by a carbon dioxide monitoring catheter 2, the critical carbon dioxide monitoring of the patient is more accurate.

[0024] In the present invention, the cross-sectional area of ​​the exhaled sampling airway 8 is less than 1 / 2 of the cross-sectional area of ​​the oxygen supply channel 9. The diameter of the sampling tube 4 is smaller than the diameter of the front nasal tube 3, and the length of the sampling tube 4 matches the distance between the two nasal tubes. A positioning baffle 5 corresponding to the human columella is provided upward on the exhaled sampling tube 4, and the angle between the positioning baffle 5 and the plane where the center lines of the two nasal tubes 6 are located is 70-100°, preferably 90°. Since the positioning baffle 5 is closer to the insertion end of the nasal tube 6 (the end of the nasal tube inserted into the nostril) than the front nasal tube 3, the positioning baffle 5 first reaches the position of the columella when worn, thereby limiting the position of the front nasal tube 3 to prevent the front nasal tube 3 from being too close to the nostrils. When the positioning baffle 5 abuts against the columella of the patient's nose, a certain distance is left between the front nasal tube 3 and the patient's nose to ensure smooth exhalation of the patient.

[0025] In the utility model, the carbon dioxide monitoring catheter 2 is fixed to the oxygen supply branch 1 by the first fixing ring 11, so as to prevent the carbon dioxide monitoring catheter 2 from being entangled with the oxygen supply branch 1, and improve the neatness of the utility model. At the same time, the two oxygen supply branches 1 are matched with the second fixing ring 12, and the second fixing ring 12 is provided with two perforations. The distal interfaces of the two oxygen supply branches 1 are each movably passed through one perforation, and then connected to the oxygen supply main pipe 10. The second fixing ring 12 has a certain restraining effect on the oxygen supply branch 1, and the oxygen supply branch 1 can move along the second fixing ring 12. The setting of the second fixing ring 12 enables a band ring adapted to the patient's head to be formed between the two oxygen supply branches 1 and the front nasal tube 3. When wearing, the position of the second fixing ring 12 on the oxygen supply branch 1 is adjusted according to the size of the patient's head, so that the patient's head can pass through the band ring, and after the two nasal tubes 6 are inserted into the two nostrils of the patient, the position of the second fixing ring 12 is adjusted to make the band ring smaller, and the band ring is adapted to the patient's head to be fixed on the patient's head, so as to play a restraining and fixing role and prevent the front nasal tube 3 from falling off.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nasal oxygen cannula with end-tidal carbon dioxide monitoring, characterized in that: The invention comprises a front nasal tube (3), wherein two ports of the front nasal tube (3) are respectively connected to an oxygen supply branch tube (1), and the distal interfaces of the two oxygen supply branch tubes (1) are connected to the same oxygen supply main tube (10). The front nasal tube (3) is provided with two nasal plug tubes (6) on one side corresponding to the human nasal cavity, and an oxygen supply channel (9) and an exhaled air sampling airway (8) are arranged in parallel in the nasal plug tube (6), and the oxygen supply channel (9) and the front nasal tube (3) are communicated, and the front nasal tube (3) is provided with an exhaled air sampling tube (4) at a position obliquely above the side corresponding to the human nasal cavity, and the two exhaled air sampling airways (8) merge into the exhaled air sampling tube (4), and one end of the exhaled air sampling tube (4) is closed, and the other end is connected to a carbon dioxide monitoring catheter (2).

2. A nasal oxygen cannula with end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The breath sampling vent (8) is arranged above the oxygen supply channel (9).

3. A nasal oxygen cannula with end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The cross-sectional area of ​​the exhaled air sampling passage (8) is less than 1 / 2 of the cross-sectional area of ​​the oxygen supply passage (9).

4. A nasal oxygen cannula with end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The breath sampling tube (4) is provided with a positioning baffle (5) facing upwards and corresponding to the columella of the human body.

5. A nasal oxygen cannula with end-tidal carbon dioxide monitoring according to claim 1, characterized in that: The carbon dioxide monitoring catheter (2) is fixed to the oxygen supply branch pipe (1) via a first fixing ring (11); The two oxygen supply branch pipes (1) are matched with a second fixing ring (12), and the second fixing ring (12) is provided with two through-holes. The distal end interfaces of the two oxygen supply branch pipes (1) are each movably passed through one through-hole and then connected to the oxygen supply main pipe (10).

Images