CN211022672U - Nose mask for detecting exhaled air - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a nose mask for detecting exhaled air, which comprises a mask body, an air exchange cavity and two nose plugs, wherein the air exchange cavity is fixedly connected with the mask body, the nose plugs are provided with air holes along the length direction of the nose plugs, and the two nose plugs are communicated with the air exchange cavity; the ventilation cavity is communicated with an air suction pipe and an air expiration pipe, a first one-way valve for guiding outside air into the ventilation cavity is installed in the air suction pipe, a second one-way valve for guiding the air out of the ventilation cavity is installed in the air expiration pipe, one end, far away from the ventilation cavity, of the air expiration pipe is communicated with a first branch pipe and a second branch pipe, the first branch pipe is detachably communicated with a carbon dioxide detection pipe, and the second branch pipe is arranged in a bent mode. The utility model discloses in, in the nasal obstruction got into patient's nostril, gas pocket intercommunication air exchange cavity and patient's nasal cavity on the nasal obstruction, in the gas that the patient expired directly flowed into carbon dioxide detection pipe through air exchange cavity and exhaling pipe, the leakproofness was good, and carbon dioxide detects the structure more accurate. Furthermore, the nose mask of the utility model is small in size and easy to wear.

Description

Nasal mask for exhaled gas detection

technical field

The utility model relates to the technical field of medical devices, and specifically discloses a nasal mask for exhaled gas detection.

Background technique

Patients are usually given anesthesia to relieve pain before surgery or invasive physical examination. Anesthesia mainly includes general anesthesia, local anesthesia and compound anesthesia. In some minor operations or physical examinations requiring general anesthesia (such as gastroscopy, colonoscopy, etc.), due to the short time required, general anesthesia without endotracheal tube insertion, which is less traumatic to the patient, can be used, in which no muscle is used. With relaxation drugs, the patient can maintain spontaneous breathing. However, the sedative general anesthetics used can suppress the patient's breathing to a certain extent, which may lead to hypoxemia and/or hypercapnia, which may even be life-threatening in severe cases. In order to ensure the safety of the patient, the amount of carbon dioxide in the patient's exhaled air (which can reflect the patient's spontaneous breathing function) can be detected, so as to grasp the patient's spontaneous breathing situation in real time and prevent breathing disorders in time. The existing method can wear an oxygen mask on the patient's face, and transmit the patient's exhaled gas to a carbon dioxide detection instrument for detection through a catheter connected to the oxygen mask. The ventilation space formed by the oxygen mask and the patient's face is larger and contains more air. The exhaled gas of the patient is mixed with more air in the ventilation space, which affects the detection result of carbon dioxide amount.

Utility model content

The purpose of the utility model is to provide a nasal mask for exhaled gas detection to solve the problem that the oxygen mask does not fit closely with the patient's face and affects the detection result.

In order to achieve the above purpose, the solution of the present invention is: a nasal mask for exhaled gas detection, including a mask body, a ventilation cavity and two nasal plugs, the ventilation cavity and the mask body are fixedly connected, and the nasal plug is provided with air holes along its length direction. , the two nasal plugs are connected with the ventilation cavity; the ventilation cavity is connected with an inhalation pipe and an expiratory pipe, the inhalation pipe is installed with a first one-way valve for introducing the external gas into the ventilation cavity, and the expiratory pipe is installed with a gas The second one-way valve leading out the ventilation cavity is connected with a first branch pipe and a second branch pipe at the end of the exhalation pipe away from the ventilation cavity, the first branch pipe is detachably connected with a carbon dioxide detection pipe, and the second branch pipe is bent.

The working principle and beneficial effect of this scheme are as follows: two nasal plugs are inserted into the two nostrils of the patient respectively. Due to the large volume of the nasal plugs, the nasal plugs and the nostrils are closely fitted with good sealing performance, and the gas exhaled by the patient is directly passed through the nasal plugs and replaced The air cavity, expiratory tube and the first branch tube flow into the carbon dioxide detection tube, and are detected by the carbon dioxide detection instrument. The exchange of carbon dioxide with the outside air is avoided during the whole process, which effectively ensures the accuracy of the patient's exhaled gas detection results. In addition, in this solution, the volume of the ventilation cavity is smaller than the ventilation space formed by the oxygen mask and the patient's face, and the air in the ventilation cavity is less, which greatly reduces the amount of air mixed with the exhaled gas, thereby increasing the exhaled gas. Accuracy of test results. At the same time, the volume of the ventilation chamber is small, which is easier for patients to wear and remove.

Optionally, both the first one-way valve and the second one-way valve include a fixed flap and a membrane, the fixed flap is fixedly connected to the inner wall of the inhalation pipe or the expiratory pipe, and the center of the fixed flap is provided with A through hole; the edge part of the film is fixedly connected with the fixed flap, the film covers the fixed flap, and the film is provided with a ventilation hole, and the ventilation hole and the through hole are arranged staggered.

When the patient inhales, the internal pressure of the ventilation chamber is instantly lower than the external atmospheric pressure. Therefore, the external air flows into the suction pipe, blows the film through the through hole of the fixed valve, and then enters the ventilation chamber through the ventilation hole on the film; , in the expiratory tube, the outside air will stick the film on the fixed valve, and the through hole of the fixed valve is sealed by the film to realize the closing of the expiratory tube. Similarly, when the patient exhales, the internal pressure of the ventilation chamber is instantly greater than the external atmospheric pressure. , the film in the inspiratory pipe is attached to the fixed valve to realize the closing of the inspiratory pipe, while the film in the expiratory pipe is blown up by the exhaled gas, and the exhaled gas passes through the second one-way valve, so that the inhalation pipe only takes in air. , the function of the expiratory tube only to outgas.

Optionally, the carbon dioxide detection tube is connected to one of the tubes through a medical Luer connector.

The carbon dioxide detection tube and the first branch tube are detachably connected by using a medical Luer connector, which is convenient for disassembly and replacement.

Optionally, elastic ear straps are fixedly connected to both sides of the cover body.

By hanging the elastic ear straps on both ears of the patient, the cover body is fixed, thereby further fixing the nasal congestion.

Optionally, both ends of the cover body are fixedly connected with elastic bands, one end of the elastic band away from the cover body is fixedly connected with a nylon hook belt, and one end of the other elastic band away from the cover body is fixedly connected with a nylon fleece belt.

By sticking the nylon hook tape and the nylon fleece tape, the cover body is fixed, so as to further fix the nasal congestion. And it can avoid restraining both ears of the patient and improve the comfort of the patient.

Optionally, the length of the elastic strap with nylon fleece straps is longer than the length of the elastic strap with nylon hook straps.

Nylon hook straps may catch the patient's hair, so when the length of the elastic strap with nylon hook strap is longer than the elastic strap with nylon hook strap, nylon hook strap and nylon fleece strap can be carried out on the patient's cheek. Paste, avoiding the nylon hook straps catching the patient's hair. Moreover, since the sticking of the nylon hook tape and the nylon fleece tape is located at the cheek of the patient, it is very convenient to tear the nylon hook tape and the nylon fleece tape, that is, it is convenient to remove the nasal mask.

Optionally, the number of the ventilation holes is multiple, and the multiple ventilation holes are distributed along the circumferential direction of the film.

When the number of ventilation holes is multiple, under the condition of the same exhaled gas flow rate, the area of a single ventilation hole is small, and it is not easy to overlap with the through hole, so as to ensure the sealing performance.

Optionally, the front end of the nasal plug is smaller than the rear end of the nasal plug.

Conveniently insert nasal plugs into the patient's nostrils.

Optionally, the nasal plug is made of elastic material.

The nasal plugs are made of an elastic material that is elastic and can deform to fit snugly in the patient's nostrils.

Optionally, a plurality of annular grooves are opened on the peripheral wall of the nasal plug.

The multiple ring grooves form uneven lines on the peripheral wall of the nasal plug, which can increase friction and prevent the nasal plug from slipping.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the nasal mask for exhaled gas detection of the present invention;

Fig. 2 is the side view structure schematic diagram of the junction of nasal obstruction and ventilation cavity;

3 is a schematic structural diagram of a first one-way valve;

4 is a schematic structural diagram of Embodiment 2 of the nasal mask for exhaled gas detection of the present invention.

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the accompanying drawings include: cover body 1, ventilation cavity 2, nasal plug 3, elastic ear band 4, air hole 5, inhalation pipe 6, exhalation pipe 7, first one-way valve 8, second one-way valve Directional valve 9, fixed flap 10, film 11, through hole 12, vent hole 13, first branch pipe 14, second branch pipe 15, carbon dioxide detection pipe 16, medical Luer connector 17, elastic band 18, nylon hook belt 19, nylon velvet belt 20.

Example 1

This embodiment is basically shown in Figures 1 and 2: the nasal mask for exhaled gas detection includes a mask body 1, a ventilation cavity 2 and two nasal plugs 3, and elastic ear straps 4 are fixedly connected to both sides of the mask body 1, The cover body 1 is fixed by hanging the elastic ear straps 4 on both ears of the patient, so as to further fix the nasal plug 3 . The ventilation cavity 2 is fixedly connected with the cover body 1, and the nasal plug 3 is provided with an air hole 5 along its length direction. superior. The front end of the nasal plug 3 is smaller than the rear end of the nasal plug 3, which is convenient for inserting the nasal plug 3 into the nostril of the patient. The outer peripheral wall of the nasal plug 3 is provided with a plurality of annular grooves, so as to form uneven lines on the outer peripheral wall of the nasal plug 3 to increase friction. The nasal plug 3 is made of elastic material. In this embodiment, the nasal plug 3 is made of elastic rubber material.

The ventilation chamber 2 is communicated with an inhalation pipe 6 and an exhalation pipe 7. The inhalation pipe 6 is equipped with a first one-way valve 8 for introducing the outside air into the ventilation chamber 2, and the exhalation pipe 7 is equipped with a gas outlet to exchange the air. The second one-way valve 9 of the air chamber 2 . 3, both the first one-way valve 8 and the second one-way valve 9 include a fixed flap 10 and a membrane 11, and the fixed flap 10 is fixedly connected to the inner wall of the inhalation pipe 6 or the expiratory pipe 7 (the first The fixed flap 10 of the one-way valve 8 is fixedly connected to the inner wall of the suction pipe 6, and the fixed flap 10 of the second one-way valve 9 is fixedly connected to the inner side wall of the expiratory pipe 7), and the center of the fixed flap 10 is opened. There are through holes 12; the edge portion of the film 11 is fixedly connected with the fixed flap 10, the film 11 covers the fixed flap 10, and a plurality of ventilation holes 13 are opened on the film 11. In this embodiment, the number of ventilation holes 13 is six, six The ventilation holes 13 are distributed along the circumference of the film 11 , and the ventilation holes 13 are staggered from the through holes 12 .

The end of the expiratory pipe 7 away from the ventilation cavity 2 is connected with a first branch pipe 14 and a second branch pipe 15. The diameter of the orifice of the first branch pipe 14 close to the expiratory pipe 7 is larger than that of the second branch pipe 15 close to the expiratory pipe 7. . The second branch pipe 15 is bent and arranged, and the first branch pipe 14 is detachably connected with the carbon dioxide detection pipe 16. Specifically, the carbon dioxide detection pipe 16 is communicated with the branch pipe through the medical Luer joint 17, so as to facilitate the separation of the carbon dioxide detection pipe 16 and the first branch pipe 14, so as to Clean and disinfect nasal masks.

The specific implementation process is as follows: first, insert the two nasal plugs 3 into the two nostrils of the patient respectively, because the nasal plug 3 is made of elastic rubber material and has elasticity, therefore, the nasal plug 3 is deformed after being inserted into the patient's nostrils, and the nasal plug 3 and the The inner wall of the patient's nostrils fits tightly and seals well. Then, the elastic ear straps 4 on both sides of the cover body 1 are hung on both ears of the patient to realize the fixation of the cover body 1, thereby further fixing the nasal plug 3 and preventing the nasal plug 3 from being separated from the patient's nostrils.

The patient maintains spontaneous breathing after anesthesia. When the patient inhales, the internal pressure of the ventilation chamber 2 is instantly lower than the external atmospheric pressure. Therefore, the external air flows into the suction pipe 6 and blows the film 11 through the through hole 12 of the fixed valve 10. , and then enter the ventilation cavity 2 through the ventilation holes 13 on the membrane 11, and then enter the patient's nostrils through the ventilation holes 5 of the nasal plug 3; during this process, the membrane 11 in the expiratory tube 7 is closely fixed under the action of the external atmospheric pressure. The valve 10, the ventilation hole 13 and the through hole 12 are staggered, and the film 11 seals the through hole 12 to realize the closing of the exhalation tube 7.

When the patient exhales, the internal pressure of the ventilation chamber 2 is instantly greater than the external atmospheric pressure. Therefore, the exhaled gas passes through the through hole 12 on the fixed valve 10 in the exhalation tube 7 and blows the film 11, and then passes through the ventilation hole of the film 11. 13. The carbon dioxide detection pipe 16 flows into the carbon dioxide detection pipe 16 through the first branch pipe 14, and the carbon dioxide detection pipe 16 transports the exhaled gas to the carbon dioxide detection instrument for detection. Moreover, due to the curved arrangement of the second branch pipe 15 , it has a certain buffering effect on the exhaled gas discharged through the second branch pipe 15 , thereby ensuring that part of the exhaled gas can smoothly flow into the carbon dioxide detection pipe 16 through the first branch pipe 14 . During the whole process, the exhaled gas is not exchanged with the outside air, and the sealing performance is good, which effectively ensures the accuracy of the exhaled gas detection results. Not only that, in this embodiment, the volume of the ventilation chamber 2 is small, so less air stays in the ventilation chamber 2. Compared with the ventilation space formed by the oxygen mask and the patient's face, the volume of the ventilation chamber 2 is greatly reduced. The amount of air that the gas mixes, thereby improving the accuracy of the exhaled gas detection results. At the same time, the entire nasal mask is small in size and easier to wear and remove.

In addition, the end of the suction pipe 6 away from the ventilation chamber 2 in this embodiment can be connected to a gas (oxygen or air-oxygen mixed gas) delivery pipe to provide the patient with oxygen or air-oxygen mixed gas, and whether the suction pipe 6 is compatible with the gas The connection of the delivery tube is determined by the medical staff according to the specific condition of the patient.

Embodiment 2

The difference between this embodiment and the first embodiment is that as shown in FIG. 4 , elastic bands 18 are fixedly connected to both sides of the cover body 1 , and one end of the elastic band 18 away from the cover body 1 is fixedly connected to a nylon hook belt. 19. One end of the other elastic band 18 away from the cover body 1 is fixedly connected with a nylon fleece band 20, and the length of the elastic band 18 with the nylon fleece band 20 is longer than that of the elastic band 18 with the nylon hook band 19, while the nylon hook The strap 19 is shorter than the nylon fleece strap 20 .

In this embodiment, after inserting the two nasal plugs 3 into the two nostrils of the patient respectively, the nylon hook tape 19 and the nylon fleece tape 20 on the two elastic tapes 18 are pasted together. The length of the elastic band 18 is longer than the elastic band 18 with the nylon hook band 19, therefore, the bonding point of the nylon hook band 19 and the nylon fleece band 20 is located at the patient's cheek, so the nylon hook band 19 is not easy to hook the patient's hair . In addition, since the bonding site of the nylon hook tape 19 and the nylon fleece tape 20 is located at the patient's cheek, it is more convenient for medical staff or the patient to tear the nylon hook tape 19 and the nylon fleece tape 20 to remove the nasal mask.

The above descriptions are only the embodiments of the present invention, and the common knowledge such as the well-known specific structures and characteristics in the solutions are not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present utility model, several deformations and improvements can also be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the present utility model. The effect of the implementation of the new model and the practicability of the present invention.

Claims (10)

1. The nasal mask for exhaled gas detection, comprising a mask body, is characterized in that: also comprising a ventilation cavity and two nasal plugs, the ventilation cavity is fixedly connected with the mask body, and the nasal plug is provided with air holes along its length direction, and the two nasal plugs are both connected with The ventilation cavity is connected; the ventilation cavity is connected with an inhalation pipe and an exhalation pipe, the inhalation pipe is installed with a first one-way valve for introducing the external gas into the ventilation cavity, and the expiratory pipe is installed with a first one-way valve for leading the gas out of the ventilation cavity. Two one-way valves, one end of the exhalation pipe away from the ventilation cavity is connected with a first branch pipe and a second branch pipe, the first branch pipe is detachably connected with a carbon dioxide detection pipe, and the second branch pipe is bent and arranged. 2. The nasal mask for exhaled gas detection according to claim 1, wherein the first one-way valve and the second one-way valve both comprise a fixed flap and a membrane, and the fixed flap is fixedly connected to the suction pipe Or on the inner side wall of the expiratory tube, a through hole is opened at the center of the fixed valve; the edge portion of the film is fixedly connected with the fixed valve, the film covers the fixed valve, and the film is provided with a ventilation hole, and the ventilation hole is connected with the through hole. Stagger settings. 3. The nasal mask for exhaled gas detection according to claim 1 or 2, wherein the carbon dioxide detection tube is connected to one of the tubes through a medical Luer connector. 4 . The nasal mask for exhaled gas detection according to claim 3 , wherein elastic ear straps are fixedly connected to both sides of the mask body. 5 . 5. The nasal mask for exhaled gas detection according to claim 3, wherein both ends of the mask body are fixedly connected with elastic bands, wherein one end of the elastic band away from the mask body is fixedly connected with a nylon hook band, and the other One end of an elastic band away from the cover body is fixedly connected with a nylon fleece band. 6 . The nasal mask for exhaled gas detection according to claim 5 , wherein the length of the elastic band with nylon fleece tape is longer than that of the elastic band with nylon hook tape. 7 . 7 . The nasal mask for exhaled gas detection according to claim 2 , wherein the number of the ventilation holes is multiple, and the multiple ventilation holes are distributed along the circumferential direction of the film. 8 . 8 . The nasal mask for exhaled gas detection according to claim 1 , wherein the front end of the nasal plug is smaller than the rear end of the nasal plug. 9 . 9 . The nasal mask for exhaled gas detection according to claim 8 , wherein the nasal plug is made of elastic material. 10 . 10 . The nasal mask for exhaled gas detection according to claim 9 , wherein a plurality of annular grooves are formed on the outer peripheral wall of the nasal plug. 11 .

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