28 results about "Nasal catheter" patented technology

The utility model discloses a non-invasive respiration auxiliary fixing suite which can stably and effectively maintain a nasal catheter on the face of a patient, is convenient to adjust the tightness during fixing according to the face shape of the patient, is adaptive to different head shapes or face shapes, and can stably maintain the position of the catheter in the non-invasive respiration treatment period. And the problem of pressure sores in the treatment period can be avoided. According to the technical scheme, the nasal catheter fixing device is characterized by comprising a belt body, a catheter, a nasal tube cover, an attaching piece and an adjusting structure, the catheter is connected with the belt body through the nasal tube cover, the attaching piece is arranged at the position of the catheter and / or the nasal tube cover, the adjusting structure comprises a fixing base, a control button, a linkage assembly and a locking piece, and the control button and the linkage assembly are both arranged on the fixing base. The fixing base is detachably connected to the belt body, the control button moves to drive part of the belt body to be contained in the fixing base, the locking piece is arranged at the control button to limit the state of the control button, the adjustment of the tightness degree of the belt body can be achieved only through one control button, and operation is convenient, fast and efficient.

This application discloses a portable medical nasal cannula storage structure, including a trolley body with a slot at its front end; several storage drawers are installed sequentially from top to bottom inside the slot; a storage tray is installed inside each storage drawer, and a winding groove is formed on the outer circumference of the storage tray; a small UV-C ultraviolet disinfection lamp is installed at the bottom of each storage drawer for disinfecting the lower drawers. According to this portable medical nasal cannula storage structure, the trolley body is integrally injection molded from medical-grade ABS material, and equipped with universal wheels with brakes at the bottom, ensuring structural stability and resistance to medical disinfectant corrosion, while also enabling flexible movement and fixed-point locking, improving portability and safety; the slotted structure at the front end of the trolley body allows for the secure installation of layered storage drawers, and the storage tray is made of moisture-proof modified PP material with winding grooves to ensure standardized winding and storage of the nasal cannula.

A catheter assembly (1) for use in septoturbinatoplasty procedures. The catheter has a shaft (20) and a primary balloon (10) which comprises a base (B) for positioning against the nasal floor, a roof (R) opposed from the base (B) and a side surface (SS) extending therebetween for bearing against a nasal septum and / or an inferior turbinate. The base (B) has a width greater than the roof (R) in a direction transverse to the axis of the shaft (20). The balloon (10) can be inserted into a patients nasal cavity and inflated to realign the patient's septum and / or treat the turbinate.

The utility model relates to medical auxiliary technique field, concretely relates to nasal stomach tube paste, including sticking and nasal paste piece on the nose, and with the pipe paste piece for nasal catheter fixed, be provided with connecting portion between the nasal paste piece and pipe paste piece, the connecting portion is the belt body, and both ends of the inner surface of belt body are provided with magic paste hook face and nap face respectively, and the belt body is wound on the nasal paste piece and is fixed through magic paste hook face and nap face connection, the utility model discloses the design of vertical connection, and the tension can be more evenly distributed on the surface of adhesive tape, and cooperate with the rubber band of the outer surface of belt body and set up and further increase the friction force with the nose portion and contact the nose portion, so the influence to the nasal paste piece is more balanced, reduces the risk that the adhesive tape slides or shifts.

The utility model discloses a nasal catheter temperature sensor integrated protective shell, which comprises a connecting sheet, two sleeves are fixed on the lower surface of the connecting sheet in a conducting manner, one side of each sleeve is provided with a through hole, the through holes are arranged on the lower surface of the connecting sheet, one end of the connecting sheet is fixedly connected with two first connecting belts, the first connecting belts are fixedly connected with female buckles, and the female buckles are fixedly connected with the connecting sheets. A male buckle is clamped and fixed on the female buckle, and the male buckle is fixedly connected to the other end of the connecting piece; according to the utility model, the nasal catheter and the mouth-nose thermosensitive airflow sensor can be integrally fixed and protected, so that the problems that the device is easy to slip and abrade with each other and the probe is easy to break due to separate use of the nasal catheter and the mouth-nose thermosensitive airflow sensor at present are solved, and meanwhile, the stimulation area of the nasal catheter and the mouth-nose thermosensitive airflow sensor on local nasal mucosa is reduced when the nasal catheter and the mouth-nose thermosensitive airflow sensor are used; in addition, the disposable medical nursing bed is convenient to disassemble and assemble, can be repeatedly disassembled and disinfected, and can be repeatedly used, so that the medical cost is effectively reduced.

The utility model discloses a conversion device suitable for mask oxygen uptake and nasal catheter oxygen uptake of an anaesthesia machine, which relates to the technical field of medical equipment and comprises a round-cake-shaped base station, a small piston is arranged at one end of the base station, a large piston is arranged at one end, far away from the small piston, of the base station, and a flexible belt is arranged on the side face of the base station. A circular ring fixing structure is arranged at one end of the flexible belt away from the base. The breathing pipeline adapter connected with the anesthesia machine is fully utilized, the breathing pipeline adapter two-way piston is researched and developed, the oxygen output end of the breathing pipeline adapter can be communicated with the mask and the nasal catheter, switching between the mask and the nasal catheter is safe and portable, and clinical anesthesia work is safer and more convenient.

The utility model relates to the technical field of medical inflatable pillows, in particular to a post-anesthesia observation air pillow. The air pillow comprises an air bag pillow body, a transverse bag body is arranged on one longitudinal side of the air bag pillow body, and the transverse bag body is higher than the middle area of the pillow face of the air bag pillow body after being inflated and used for lifting the neck of a patient; the inflation pump is communicated with the air bag pillow body and the transverse bag body through a pipeline; the sensor is in pipeline connection with a nasal catheter and is used for detecting the end-tidal carbon dioxide concentration of a patient; and the controller is in communication connection with the sensor and the inflator pump and is used for regulating and controlling the inflator pump to inflate according to the carbon dioxide concentration. The sensor is connected with the nasal catheter to detect the end-expiratory carbon dioxide concentration of a patient, the controller automatically regulates and controls the inflator pump to inflate according to the carbon dioxide concentration, the transverse bag body protrudes out of the pillow face after being inflated to enable the patient to raise the head to open an airway, the head position of the patient can be automatically adjusted, and the respiratory tract blockage condition is improved.

The invention provides a multi-channel composite connection monitoring pipeline structure integrated with NO infusion. The multi-channel composite connection monitoring pipeline structure comprises an infusion catheter, an oxygen input connector, a rotary conversion connector, an NO injection tee joint, a gas sampling tee joint, an oxygen flow sensor and a mixed gas flow sensor. NO is injected into the infusion catheter through the NO injection tee joint and is mixed with oxygen in the infusion catheter, the gas sampling tee joint is located on the downstream of the first connecting pipe of the infusion catheter to obtain stable mixed gas for real-time concentration monitoring, and the two flow sensors are used for monitoring the oxygen and the gas flow after the NO and the oxygen are mixed in real time respectively. The rotary adapter is quickly compatible with a nasal catheter, a mask and an extracorporeal circulation related interface, so that cross-scene seamless connection of intraoperative and postoperative NO treatment is realized. According to the invention, the frequency of pipeline replacement is reduced, the risks of gas leakage, misconnection and pollution are reduced, the stability and controllability of oxygen and NO gas delivery are improved, and the safety and effectiveness of NO infusion are improved.

The invention discloses a nasal catheter device with a monitoring function, and relates to the field of medical treatment, and the nasal catheter device comprises an optical fiber acoustic sensing element which is used for converting vibration and / or pressure fluctuation of breathing sound waves of a patient into optical signals; the electronic module is used for receiving an optical signal from the optical fiber acoustic sensing element and converting the optical signal into an electric signal for respiration monitoring, and the electronic module is used for giving an alarm when respiration sound waves reach a preset condition and sending monitoring data to a mobile terminal. Therefore, according to the nasal catheter device with the monitoring function, the nasal catheter body, the optical fiber acoustic sensing element and the electronic module are integrated, the nasal catheter device can have the independent respiration monitoring function and the early warning function, the structure is simple, use is convenient, accuracy and reliability are achieved, meanwhile, the safety and the intelligent level of the oxygen therapy process can be remarkably improved, and the practicability is high. And compared with external monitoring equipment, the cost is low, and the workload of medical staff can be reduced.

The utility model discloses a tracheoscope mouthpiece with nasal catheter fixing function, including a medical staff is in the tracheoscope examination of patient is put into the mouth of patient for its upper jaw teeth and lower jaw teeth occlusion bite body, in the middle part of bite body along its axial direction direction is equipped with the tracheoscope detection channel of the tube body of tracheoscope from its patient mouth part and needs to carry out the position of detection. The utility model discloses through nasal catheter fixing structure can effectively fix nasal catheter, not only has reduced the labor intensity of medical staff, and also has improved the inspection efficiency of tracheoscope, has brought greater convenience to the inspection work of tracheoscope.

The utility model relates to medical instrument technical field especially, more particularly to a child type nasal catheter oxygen inhalation device not easy to fall off pipe, including headband etc.

The utility model relates to the technical field of medical instruments, and discloses a decompression oxygen pipeline protection structure which comprises an oxygen uptake tube and a nasal catheter, the oxygen uptake tube is clamped in an inner cavity of the nasal catheter, the side wall of the oxygen uptake tube is in sliding connection with a plurality of installation frames, clamping assemblies are installed on the inner walls of the installation frames, and the clamping assemblies are used for fixing the installation frames; according to the decompression oxygen pipeline protection structure, the side wall of the oxygen inhalation tube is sleeved with the mounting frame, then the mounting frame is sleeved with the foam cotton, the foam cotton is used for buffering the pressure of the oxygen inhalation tube on the face and the skin behind the ears, the pressed part of a patient can be protected, a sliding column and a clamping block are pressed downwards to slide to the bottom of a rotating wheel, and at the moment, the rotating wheel can rotate on the outer wall of the oxygen inhalation tube; and after adjustment is completed, the sliding column is loosened, the clamping block can return to the position between the rotating wheels, the rotating wheels are clamped, and the rotating wheels cannot rotate, so that the position of the mounting frame is fixed, and the mounting frame and the foam are prevented from sliding and falling off in the wearing process.

1. The name of the design product: nasal catheter. 2. The use of the design product: for providing respiratory treatment, delivering gas, etc. 3. The design points of the design product: in the shape of the product. 4. The picture or photo that best shows the design points: Design 1 perspective view. 5. Design 1 is designated as the basic design. 6. Other circumstances that need to be explained: A and B parts in Design 1 are transparent materials.

The invention provides a nasal catheter design method based on reinforcement learning, and the method comprises the steps: collecting oxygen supply working conditions, nasal cavity geometry, material characteristics and manufacturing process boundaries, and building and parameterizing geometry, material and process data; a fluid, heat and contact pressure coupled simulation environment is constructed based on the parameter space, a simulation prediction model is established, and error calibration is carried out; determining a target performance index of the nasal catheter, constructing a composite reward function including a leakage rate, a contact pressure peak value and a dimensional deviation, and introducing a manufacturing feasible region constraint; taking the simulation and prediction model as an environment, and adopting a reinforcement learning algorithm to carry out strategy training on a parameter set; and the optimal geometric, material and process parameters are mapped into a CAD mold model, a material formula and a numerical control equipment control instruction respectively, and manufacturing landing is achieved. Automatic design and manufacturing of the nasal catheter under personalized working conditions are achieved, and the sealing performance, the comfort degree and the size stability are improved.

The utility model relates to the technical field of medical treatment, and particularly discloses a nasal catheter fixing device for preventing pressure sores, which comprises a fixing device (10), wearing devices (20) mounted on two sides of the fixing device (10), and nasal catheters (30) fixed on the wearing devices (20) and the fixing device (10), according to the nasal catheter fixing device, the fixing device is adopted to replace an existing I-shaped sticker, the nasal catheter is prevented from being stuck to the nose and pressing nasal sores on the nose, meanwhile, the nasal catheter is fixed to the fixing device, the nasal catheter inserted into the nasal cavity can be adjusted through the limiting stopper on the fixing device, and the nasal catheter can be fixed to the nasal cavity through the limiting stopper on the fixing device at a proper position. The nasal catheter is fixed, damage to the nasal cavity caused by the fact that the nasal catheter presses the nasal cavity is prevented, the fixing device can be easily worn on the two sides of the ear through the wearing device, the nasal catheter can be fixed through the fixing device and the wearing device together, and the nasal catheter is prevented from pressing nasal sores and the nasal cavity.

The utility model relates to the technical field of medical instruments, and discloses a telescopic nasal catheter which comprises a plurality of hoses and a plurality of telescopic tubes, the telescopic tubes and the hoses are arranged at intervals respectively, the two ends of each telescopic tube are fixedly connected and communicated with the adjacent ends of every two adjacent hoses respectively, and a fixing assembly is connected between every two adjacent hoses. The ends, away from each other, of the two hoses located at the tail end are connected with a detector and an adjusting assembly correspondingly, and the detector is connected with the air outlet end of the breathing device. According to the telescopic nasal catheter, the hoses and the telescopic tubes are arranged at intervals, so that the whole nasal catheter can be lengthened by a certain length to a certain extent, the nasal catheter cannot be pulled when a patient moves or gets up on a sickbed, and the use convenience and applicability of the nasal catheter are improved.

The utility model discloses an oxygen inhalation nasal catheter which comprises a nasal catheter body, and an elastic frame and a shell are arranged on the outer surface of the nasal catheter body. Mounting seats are fixedly connected to the two sides of the outer surface of the elastic frame, first fixed guide pipe seats are fixedly connected to one sides of the outer surfaces of the two mounting seats, elastic push-pull assemblies are mounted on the two mounting seats, and first guide pipe pressing seats are fixedly connected to the movable ends of the two elastic push-pull assemblies. According to the utility model, through the arrangement of the mounting seat, the first fixed catheter seat, the first catheter pressing seat, the second fixed catheter seat, the second catheter pressing seat, the elastic push-pull assembly and the bidirectional elastic moving assembly, the elastic frame, the fixing device and the nasal catheter main body are designed in a split manner and are convenient to separate, so that the elastic frame and the fixing device can be reused; resource waste is avoided, the position of the elastic frame on the nasal catheter body can be adjusted according to actual requirements, and therefore the overall applicability is improved.

The invention relates to the technical field of breathing equipment, in particular to a breathing device for patients with lung diseases, which comprises a butt-joint plate and a butt-joint pipe, the butt-joint plate is in butt joint with a sickbed headboard, the butt-joint pipe is in rotary butt joint with the butt-joint plate, a through hole is formed in the butt-joint pipe, a locking component is mounted in the through hole, and a movable seat slidably sleeves the outer side of the butt-joint pipe. A locking part is arranged on the butt joint pipe, the locking part is arranged on the movable seat, the movable seat is positioned through the locking part, a clamping part is installed on one side of the movable seat, a nasal catheter is inserted into the clamping part, and a reset part is installed on the other side of the movable seat. The locking part and the movable seat are designed on the butt joint pipe, so that the clamping part on the movable seat can drive the nasal catheter to move; when the patient lies normally, the length of the nasal catheter meets the requirement for normal movement of the patient, and when the patient sleeps, the moving seat moves to pull up the overlong nasal catheter, so that the nasal catheter is in a suspended state, and the situation that the patient turns over to press the nasal catheter is avoided.

The invention provides a humidifying oxygen uptake device which comprises an oxygen uptake bottle body, a humidifying bottle is arranged on the oxygen uptake bottle body, an air supply pipe connected with the humidifying bottle is further arranged on the oxygen uptake bottle body, an air outlet pipe is further arranged on the humidifying bottle, and an air outlet multi-way is arranged on the air outlet pipe. A first oxygen uptake branch pipe used for conveying humidified oxygen to the puerpera and a plurality of second oxygen uptake branch pipes used for conveying the humidified oxygen to the newborns are further arranged on the multi-way air outlet, a nasal catheter used for conveying the humidified oxygen to the puerpera is arranged on the first oxygen uptake branch pipe, and the second oxygen uptake branch pipes are connected with the transparent cover; the transparent cover is further provided with an adjusting supporting module used for being connected with the baby carriage. According to the humidifying oxygen inhalation device, the requirement for oxygen inhalation of a puerpera and a newborn at the same time can be met, the transparent oxygen cover for the newborn can be stably fixed to the position above a baby crib by arranging the adjustable supporting structure, continuous manual supporting is not needed, and the accompanying burden is effectively relieved.

The invention relates to the technical field of medical instruments, and particularly discloses a non-invasive high-flow nasal plug device based on child nasal catheter modification. According to the device, on the basis of a traditional nasal catheter, an umbrella-shaped dispersion plate fixed by a support and a diffusion cavity structure with a plurality of vent holes formed in the peripheral wall are additionally arranged in a nasal plug head, and high-speed oxygen flow is converted into soft diffuse airflow through two-stage pure mechanical diffusion. A pressure relief valve composed of a spring, a push block and a baffle ring is integrated at the position of a three-way pipe at the tail end of an oxygen conveying pipeline, and when the pipeline is blocked and the pressure rises, pressure relief can be automatically started; the pressure relief airflow drives the alarm whistle to give out whistling sound to prompt pipeline abnormity. On the premise of keeping high-flow oxygen supply, the comfort level of a child patient is remarkably improved, safety warning and protection for pipeline blockage are provided, the structure is simple, and clinical application is facilitated.

A nasal catheter device includes a pair of nasal catheters connected to a body, where the body defines an internal body lumen. The body is adapted to be secured about a user's head, engaged with the user between substantially the nostrils and the upper lips, and a pair of nasal catheters engaged with the nostrils such that fluid communication is provided between the user's lungs and the body lumen. Breathing gas flows into the body lumen and then is delivered to the user by means of a pair of nasal catheters. The outflow gas flows from the lungs into the body cavity by means of a pair of nasal catheters and then exits from the body cavity by means of an exhaust tube. An inflow valve disposed within the body controls breathing gas flowing into the body lumen. An outflow valve may be disposed within the body for controlling fluid communication between the body cavity and the exhaust pipe.

The present application relates to the technical field of nasal catheter production, and discloses a nasal catheter spring threading device and method, wherein the nasal catheter spring threading device comprises an assembling table, a spring limiting assembly, a cannula limiting assembly and a thin tube. The spring limiting assembly is used for bearing and supplying a plurality of springs to be installed. The cannula limiting assembly is arranged correspondingly with the spring limiting assembly and is used for fixing and expanding the end of the nasal catheter towards the spring limiting assembly. One end of the thin tube can be sequentially rotated and arranged in the inside of the nasal catheter and the spring to be installed along the longitudinal direction. A plurality of air bags are arranged on the thin tube along the longitudinal direction. The other end of the thin tube is communicated with an external air pressure device. Through the nasal catheter spring threading device, the problem that each nasal catheter needs to be expanded and fixed at the end during feeding and is prone to damage and deformation of the pipe opening to affect the production quality can be effectively solved.

The application discloses a nasal catheter device capable of introducing air, which comprises a gas supply pipeline and an injection mechanism on the gas supply pipeline and separating the gas supply pipeline into an upstream pipeline and a downstream pipeline, and the injection mechanism comprises: a throat pipe which is respectively connected with the upstream pipeline and the downstream pipeline at two ends, the throat pipe comprising a support pipe body and an elastic film sleeve attached to the pipe wall of the support pipe body; the middle section of the support pipe body is formed by a plurality of strips arranged in a circle, the strips are folded inward in the radial direction to reduce the inner diameter of the middle section formed by the strips in response to the axial shortening of the support pipe body; a positioning sleeve is located outside the throat pipe, two ends of the positioning sleeve are respectively sleeved with the upstream pipeline and the downstream pipeline and are slidably connected with one of the two pipelines, so that the length of the throat pipe is adjusted through the slidable connection, and then the inner diameter of the middle section enveloped by the strips is adjusted; and the injection gas path has an injection outlet penetrating the section where the throat pipe is located and an injection inlet communicating with the ambient air.

The application relates to the field of medical devices, and discloses a high-flow oxygen inhalation detection device, which comprises the following: one end of an oxygen inlet pipe is an oxygen inlet end, and the other end is connected with a mixed input pipe to form a first connection; from the oxygen inlet end to the first connection, the pipe diameter of the oxygen inlet pipe is first gradually reduced and then gradually expanded to form a venturi pipe structure; one end of an air inlet pipe is an air inlet end, and the other end is connected with the narrowest part of the oxygen inlet pipe to form a second connection; a flow sensor and an adjusting valve are arranged at the oxygen inlet end and the air inlet end respectively, and an oxygen concentration sensor is arranged at the first connection; the flow sensor and the oxygen concentration sensor are provided with or associated with a display device; the other end of the mixed input pipe is connected with a humidifying device, the humidifying device comprises a humidifying cavity and a humidifying assembly; one end of an air outlet pipe is connected with the humidifying cavity, and the other end is connected with an oxygen mask or a nasal catheter. While the cost is considered, the mixed ratio of oxygen and air can be monitored and regulated in real time.

The utility model relates to the field of medical instruments, and discloses a disposable endoscope oxygen supply anaesthetic mask which comprises a mask body and a cap set, the cap set comprises a first cap, a second cap, a third cap and a fourth cap, and a third plug hole is formed in the center of the fourth cap. The diameter of the third plug hole corresponds to the outer diameter of the lower end of the third cap, the third plug hole and the third cap are connected in a sealed and sleeved mode, a second plug hole is formed in the center of the third cap, and the diameter of the second plug hole corresponds to the outer diameter of the lower end of the second cap. By adopting the design that a plurality of layers of plug caps with different sizes are buckled with one another, the device can adapt to medical instruments such as endoscopes with various thickness specifications, and the situation that oxygen is excessively wasted during oxygen supply is avoided; by adopting the design of the nasal cavity catheter, oxygen is directly guided to the nasal cavity of the patient and is prevented from being mixed with carbon dioxide exhaled by the patient, so that the patient inhales purer oxygen, and the problem of oxygen waste is further solved.

The invention relates to the technical field of nasal catheter fixing, in particular to an oxygen uptake nasal catheter fixing device which comprises a nostril supporting plate, a rotating block and a head band, nasal tube holes are formed in the two ends of the nostril supporting plate, and rectangular reserved openings communicate with the upper ends of the nasal tube holes; bottom round holes are formed in the bottoms of the interiors of the nasal tube holes correspondingly, arc-shaped pressing plates are connected into the bottom round holes through supporting springs, strip-shaped sliding holes are formed in the two ends of the top of the nostril supporting plate correspondingly, and sliding screw rods are slidably arranged in the strip-shaped sliding holes correspondingly. The bottom of the strip-shaped sliding hole communicates with a pressing block containing cavity, a communicating hole is formed in one end of the pressing block containing cavity, and a sliding pressing block is arranged in the pressing block containing cavity and penetrates through the communicating hole. According to the oxygen inhalation nasal catheter fixing device, the oxygen inhalation nasal catheter fixing effect is remarkably improved, sliding is prevented, the length of the oxygen inhalation nasal catheter extending into the nostrils of the patient is conveniently adjusted, and the requirements of different patients are met.

The utility model discloses a nasal catheter for assisting end-expiratory carbon dioxide monitoring, which relates to the field of nasal catheters and comprises an oxygen source joint, a carbon dioxide joint and a connecting tube, and two connectors are mounted on the connecting tube. By arranging the dismounting assembly, when the nasal plug is blocked and needs to be replaced, a worker can rotate a limiting sleeve, so that the limiting sleeve moves and does not shield a pressing rod any more, at the moment, a spring is stretched to push a movable block to move, then a clamping column is driven to move, the clamping column is moved out of a clamping hole, limiting of the nasal plug is relieved, and then the nasal plug is moved upwards; when the nose plug is installed, the nose plug only needs to be inserted into the connector, the clamping holes are aligned with the clamping columns, then the pressing rods on the two sides are pressed, the movable blocks drive the clamping columns to move, the nose plug can be clamped and limited after the clamping columns are clamped into the clamping holes, and therefore installation of the nose plug can be completed; in this way, the nose plug can be quickly disassembled, assembled and replaced, and the operation process is simple and convenient.

The invention discloses respiratory support equipment and an end-expiratory CO2 detection method and device thereof. The device comprises a nasal catheter and a respiratory state sensing mechanism. The nasal catheter comprises a main machine pipeline connector connected with the main machine and a patient nasal connector in butt joint with the nasal cavity of a patient. The nasal catheter further comprises an air bag arranged in the nasal catheter and close to the nasal connector of the patient, the air bag is connected with an air bag control connector, and the air bag control connector is externally connected with an air bag driving unit. A CO2 detection connector is further arranged between the air bag and the patient nose connector and used for being connected with a CO2 detection unit to conduct gas sampling detection; the breathing state sensing mechanism comprises a flow sensor or a pressure sensor for detecting breathing airflow; wherein the inflation state or the deflation state of the air bag is switched according to a breathing phase determined by a detection signal of the flow sensor or the pressure sensor. The invention aims at improving the accuracy of detection data and effectively judging the real-time concentration of expired CO2.