78 results about "Oxygen inhaled" patented technology

The present invention relates to the field of medical devices used in the procedures of orotracheal or nasotracheal intubation. Oral or nasal endotracheal intubation procedures are commonly employed to secure a controlled airway and to deliver inhalant oxygen, anesthetic gases, and other therapeutic agents into the trachea and lungs of human and veterinary patients. Such intubation procedures carry a significant risk of dental injury resulting from contact between the laryngoscope blade used for visualization during intubation. The present invention provides an apparatus to reduce dental injury including a modified laryngoscope blade and a disposable insert which is designed to be received and retained in a single step by the modified laryngoscope blade. The disposable insert may be quickly secured by the user, and reduces both direct pressure and shear forces on the maxillary incisor teeth when the laryngoscope blade is placed in a patient's mouth during intubation.

A method and apparatus for use in determining the cardiac output. The method include quantitatively measuring the patient's airflow, a first parameter indicative of the percent oxygen inhaled and exhaled by the patient, and a second parameter indicative of the patient's fractional arterial oxygen concentration. The method also includes inducing a change in the patient's arterial oxygen concentration while taking these measurements to monitor the effects of the change in the patient's arterial oxygen concentration. The cardiac output is determined from the data collected regarding the effects of the change in the patient's arterial oxygen concentration.

The invention belongs to the technical field of aquaculture machinery, and particularly relates to a jet device and a method and a facility for enabling a water body to flow and enrich oxygen through multiple jet devices. A jet device comprises a jet nozzle and a water supply mechanism, wherein the jet nozzle mainly comprises a water inlet tube and a water outlet tube, and the water supply mechanism can be implemented through that a single jet nozzle is connected with a water pump, and also can be implemented through that multiple jet nozzles are connected with a water pipe network for use together. According to the invention, the jet nozzle is simple in structure and good in inspiration capacity; an upper layer of water is pumped by using the water pump, so that the water body is jetted out from multiple underwater layers, in such a way, the water body is subjected to abundant flow exchange and inhales oxygen in the process of exchange; and multiple jet nozzles are subjected to centralized water supply by using a water pipe network laid at the bottom of a culture pond, so that the energy consumption can be further reduced, therefore, the jet device disclosed by the invention is especially suitable for industrial aquaculture of rare aquatic products such as prawns and the like.

The invention discloses an oxygen inhaling device for heart and cerebral vessel nursing. The oxygen inhaling device comprises a support housing, one side of the bottom inside the support housing is provided with an oxygen tank, an air purifying device and an adapting tank, the air outlet of the oxygen tank is connected to one side of the adapting tank through a conduit, the conduit through which the oxygen tank and the adapting tank are connected is provided with a solenoid valve, an air outlet of a connecting box of the air purifying device is connected to one side of the adapting tank through a conduit, one side of the support housing is provided with an air pump through a bolt, the oxygen tank can add oxygen into air, the air purifying device can filter the air, a patient is prevented from infection, a gas flow sensor can measure the respiratory capacity of the patient, and therefore the respiration of the patient is detected, so that the detection is more convenient. The oxygen inhaling device for the heart and cerebral vessel nursing is simple in structure and convenient to operate, not only can oxygen amount in the air be supplemented, but also the air can be filtered, and the patient is prevented from the infection.

The invention provides a clinical oxygen feeding device. An oxygen inhalation therapy using a conventional device at home may be caused to have a fire at the oxygen inhaling port of a nose cannula or a mouth mask by a smoking action or to have an ignition by using the device near the presence of a fire such as a stove, thereby inviting a fire. Provided is a clinical oxygen feeding device comprising a means for acquiring highly dense oxygen, a warning means for warning of an accident with voices when the accident occurs, and a control means for controlling those two means. The clinical oxygen feeding device further comprises a temperature sensor at a proper position of the body thereof, so that the device stops the feed of the highly dense oxygen and executes a voice guide when the temperature detected by the temperature sensor becomes a predetermined value or higher.

The invention belongs to the technical field of aquaculture machinery, in particular to a jet apparatus and a method and a facility for making a water body flow and oxygenating by using multiple jet apparatuses. The jet apparatus comprises a jet spray head and a water supply mechanism, wherein the jet spray head mainly comprises a water inlet barrel and a water outlet barrel; and in the water supply mechanism, a single jet spray head is connected with a water pump, or a plurality of jet spray heads are connected with a water pipe network for using together. The jet spray head is simple in structure, and has large air absorption capacity; water in an upper layer is absorbed by using the water pump, so that a water body is jetted from a plurality of underwater layers, the water body flows on a large scale for exchanging, and oxygen is absorbed in an exchanging process; and water is supplied to the plurality of jet spray heads in a centralized way through the water pipe network paved at the bottom of a culture pond, so that the energy consumption can be further lowered, and the jet apparatus is particularly suitable for industrial aquaculture of famous and precious aquatic products such as prawns and the like.

The invention discloses an intelligent control system of a self-adaptive oxygen inhaling machine. The intelligent control system of the self-adaptive oxygen inhaling machine comprises the oxygen inhaling machine (3), a physiological index monitor (2) and an intelligent terminal (4) ,wherein the oxygen inhaling machine (3) is connected with the respiratory system of an oxygen inhaling person (1) through an oxygen inhaling hose; the physiological index monitor (2) is connected with the oxygen inhaling person (1) and used for monitoring and controlling physiological indexes of the oxygen inhaling person (1), and the physiological index monitor (2) is further connected with the oxygen inhaling machine (3) and used for adjusting and controlling the oxygen inhaling machine (3); the intelligent terminal (4) is respectively connected with the oxygen inhaling machine (3) and the physiological index monitor (2) electrically, and the intelligent terminal (4) receives signals of the physiological index monitor (2) and meanwhile controls operation of the oxygen inhaling machine (3). The invention further discloses an intelligent control method of the self-adaptive oxygen inhaling machine. The intelligent control system of the self-adaptive oxygen inhaling machine can remotely monitor and control physiological conditions of the oxygen inhaling person all the time and makes response, the intelligent control system of the self-adaptive oxygen inhaling machine is wide in application range and saves human resources, and therefore safety in the oxygen inhaling process is greatly improved.

The invention belongs to the technical field of aquaculture machinery, and particularly relates to a method and facility for enabling water to flow and conducting oxygenation through a plurality of jet devices. Each jet device comprises a jet spray nozzle and a water supply mechanism. Each jet spray nozzle is mainly composed of a water inlet barrel and a water outlet barrel. According to the water supply mechanism, one single jet spray nozzle can be connected with one water pump, and a plurality of jet spray nozzles can be connected with a water pipe network to be jointly used. The jet spray nozzles are simple in structure and good in air absorption ability, the water pumps are utilized to absorb upper-layer water, the water is made to be jetted out of a plurality of underwater layers, a great amount of water flows to be exchanged and absorbs oxygen in the exchanging process, the water is supplied to the jet spray nozzles in a concentrated mode through the water pipe network laid at the bottom of a culturing pond, energy consumption can be further lowered, and the method and facility are especially suitable for industrial aquaculture of prawns and other rare aquatic products.

The present invention is directed to an oxygen-storing face mask being composed of a mask body, an air flow filtering device, side filtering pores, a breathing observation device, a sealed groove, an oxygen release tube, and an oxygen inhaling tube, and etc. The face mask of the present invention is configured as such that: a near-end small joint of the oxygen inhaling tube is connected with a joint of the oxygen inhaling tube of the face mask, a far-end double joint being connected with an oxygen source. Users can inhale oxygen by wearing the face mask of the present invention like wearing convention face masks by opening the oxygen source and adjusting oxygen flow rate. The oxygen-storing face mask herein provides diffuse oxygen inhaling, which prevents direct impact of oxygen flow to patients in the mouth and nose and mitigates malaise feeling caused during oxygen inhaling. The face mask of the present invention can further prevent cross-infection, protect patients and medical personnel, and allow direct observation of patients' self-propelled breathing.

The invention relates to the field of rehabilitation assistance, in particular to an intelligent respiratory rehabilitation device capable of assisting in sputum excretion, pronunciation and evaluation. The intelligent respiratory rehabilitation device is formed by combining an elastic element, an auxiliary component, baffle plates, water absorption elements, pressure sensors and terminals, wherein the side surface of a first air flow channel is provided with an oxygen connection hole; oxygen is supplied to the first air flow channel through the oxygen connection hole; when a patient inhales through a second air flow channel and then an oscillation sheet is pulled, the oxygen of the first oxygen flow channel enters the second air flow channel along with the inhalation of the patient, and the patient can inhale oxygen both in the first air flow channel and the second air flow channel; the second air flow channel is suitable for a patient who needs to inhale to do muscle exercises, the patient inhales through the second air flow channel, inspired air pulls the oscillation sheet to compress a resistance spring; the first air flow channel is suitable for a patient who needs to inhalesto do muscle exercises; the patient exhales to the first air flow channel, and exhaled air pushes the oscillation sheet to compress the resistance spring; and the oscillation sheet carries out reciprocating movement to generate a shockwave to accelerate removal of secretions.

The invention provides a saturated oxygen therapeutic machine. The therapeutic machine comprises a saturated oxygen cabin, the saturated oxygen cabin is provided with an oxygen cabin door and an observation window, and an oxygenator is arranged outside the saturated oxygen cabin. The saturated oxygen therapeutic machine is characterized in that a booster pump for pressurizing newly-prepared oxygenis connected to the oxygenator and is in pipeline connection with a gas storage tank for accommodating pressurized oxygen, and the gas storage tank is in pipeline connection with a buffer for stabilizing oxygen inhalation pressure; the saturated oxygen cabin is internally provided with an oxygen pipeline, the oxygen pipeline is in pipeline connection with the buffer, and an oxygen inhalation socket is connected to the oxygen pipeline, and is in pipeline connection with an oxygen inhalation mask. Through the cooperation of the oxygenator, the booster pump and the gas storage tank, oxygen is pre-prepared, pressurized, compressed and stored, it is guaranteed that equipment has sufficient oxygen during use, the problem that the oxygenator does not supply enough oxygen is solved, the saturatedoxygen cabin which is sealed as a whole more obviously increases the utilization rate of oxygen inhalation concentration, so that the concentration of oxygen inhaled into the lung by an oxygen inhaler is maintained at a higher level all the time, and the utilization rate of the oxygen inhalation concentration reaches up to 30%-50%. A comprehensive information detection displaying system makes theoxygen inhaler clearly grasp the oxygen supply situation at any time, and the saturated oxygen therapeutic machine is high in reliability, stability and automated control degree.

Oxygen inhalation and ultrasonic dosing treatment is widely applied to medical treatment. An existing oxygen-inhaling ultrasonic atomizing dosing device has difficulty in cleaning and sterilizing the whole machine or independently cleaning and sterilizing an atomizing dosing cavity. The invention provides a separable oxygen-inhaling ultrasonic dosing device. An atomizing tank (7) is provided with an oxygen inlet (8), an oxygen guide rod (9) and an oxygen outlet nozzle (10). Liquid medicine can be stored and atomized in the atomizing tank (7), and oxygen can be also circulated in the atomizing tank (7). An oxygen outlet nozzle clamping groove (6) is formed in a casing (5). When the casing (5) is screwed out of an upper cover (4), the atomizing tank (7) can be arranged in the casing. The oxygen outlet nozzle (10) protrudes out of the clamping groove (6) to be externally connected with an oxygen catheter. When being taken out, the atomizing tank (7) is convenient to clean or sterilize or replace independently. The separable oxygen-inhaling ultrasonic dosing device is simple to operate, convenient to use, suitable for an existing oxygen inhaling device and convenient to popularize.

The invention discloses a constant-temperature and constant-humidity oxygen inhaling device, which can improve the comfort level of oxygen inhalation and is applicable to the constant temperature humidified oxygen inhalation, the alcohol humidified oxygen inhalation, the lung-inhaling type drug administration therapy and the like in hospitals, sanatoriums, oxygen bars, families, the field and the like, and the oxygen inhaling device reduces the uncomfortable level or the pain of the oxygen inhaler and improves the oxygen inhaling comfortable level and the therapeutic effect by humidifying the oxygen at the constant temperature. The structure of the oxygen inhaling device comprises a cup filled with liquid, an oxygen intake pipe is inserted into the cup, the cup is further provided with a constant-temperature and constant-humidity oxygen inhaling pipe and is internally provided with an ultrasonic atomizer, and the ultrasonic atomizer is connected with a controller; simultaneously, the cup is provided internally with a temperature controller, the constant-temperature and constant-humidity oxygen inhaling pipe is provided with a humidity and temperature detector, the humidity and temperature detector is also connected with the controller, the temperature and the humidity of the humidified oxygen can be set by the controller so that the constant temperature and the constant humidity are realized.

The invention relates to a humidifying bottle enabling oxygen to be sufficiently humidified. A traditional oxygen humidifying bottle is poor in humidifying effect, quality of the oxygen which is sent out is affected, and the oxygen inhaling feeling and oxygen inhaling effect of a user when the user breathes are affected. The humidifying bottle enabling the oxygen to be sufficiently humidified comprises a bottle body and a bottle cap, the bottle cap covers the upper portion of the bottle body in a sealing mode, an oxygen inlet pipe, an oxygen outlet pipe and a liquid-adding port are formed in the bottle cap, wherein a liquid-adding port cover is arranged on the liquid-adding port; a connecting portion is arranged on the inner wall of the bottle cap, the connecting portion is connected with a cylindrical partition board which is provided with a rough surface and has elasticity, the lower portion of the partition board is not in contact with the bottom of the bottle body, the space in the bottle body is divided into an inner cavity and an outer cavity through the partition board, wherein the inner cavity and the outer cavity are communicated with each other, the oxygen inlet pipe stretches into the inner cavity, the lower portion of the oxygen inlet pipe is connected with a silencer, the tail end of the silencer is a blind end, and a plurality of silencing holes are formed in the end face of the blind end, and the tail end of the silencer is higher than the lower edge of the partition board. The humidifying bottle enabling the oxygen to be sufficiently humidified is simple in structure, low in cost, exquisite in design and convenient to use and is widely applied to hospitals and families in need of oxygen inhalation.

The invention discloses an earthworm transportation method. The method comprises the following steps of (1) earthworm carrier base material preparing; (2) earthworm mixing; (3) bagging; and (4) loading into an airplane warehouse. The method has the beneficial effects that the amount of oxygen inhaled by earthworm skin is increased, so that the survival time of earthworms is prolonged; and throughthe method, the survival temperature of the earthworms is controlled for a long time, so that the survival rate of the earthworms is increased.

The invention discloses an oxygen inhaling device for clinical oxygen transfer. The oxygen inhaling device is provided with a humidifying chamber shell the capacity of which is 150 to 300 milliliters and the periphery of which is a whole. The upper layer in the shell is an oxygen passage; the lower layer in the shell is a granular semi-fluid humidifying agent; an oxygen inlet hole and an oxygen outlet hole are arranged on the shell at two ends in the horizontal direction of the oxygen passage; the top of the humidifying chamber shell is provided with a feeding hole; and a sealed overpressure warning safety cover is arranged on the feeding hole. The humidifying agent is semi-fluid, and can fed directly through the feeding hole without needing to be heated, so that the shell keeps integral, has a firm structure, and is not broken by pressure when the pressure of oxygen is comparatively large; the oxygen inhaling device is not easy to be polluted by external bacteria; and the oxygen humidity can be over 50 percent RH at oxygen transfer, so that a patient has no risk of iatrogenic infection; no harmful volatile air is released; and no noise is generated.

The invention discloses a nasopharynx oxygen inhalation tube. The nasopharynx oxygen inhalation tube comprises a single-nostril oxygen inhalation tube, one end of the single-nostril oxygen inhalation tube is inserted into the nasopharynx of a patient through the nostril of the patient, the other end of the single-nostril oxygen inhalation tube is connected to an oxygen source through a connector, and a fixing part is arranged at the portion, close to the inserting end, of the single-nostril oxygen inhalation tube and is used for fixing the single-nostril oxygen inhalation tube at the nostril of the patient when the inserting end is inserted into the nasopharynx of the patient, so that the inserting end is prevented from sliding. By inserting the inserting end of the single-nostril oxygen inhalation tube into the nasopharynx of the patient, the concentration of oxygen inhaled by the patient is greatly increased, and the recovery of the patient is promoted; meanwhile, by arranging a temperature sensor at the side surface of the inserting end of the single-nostril oxygen inhalation tube, the temperature of the nasopharynx of the patient can be monitored in real time, so that the effect of detecting the body temperature of the patient is achieved, the pain of the patient is relieved, and the recovery process of the patient is accelerated.

A rebreathing apparatus having inhaled oxygen mixing and exhaled carbon dioxide removal functions, enabling rebreathing by maintaining the amount of breathing oxygen by inhalation and removing carbon dioxide discharged by exhalation. The rebreathing apparatus includes a mask having one side to which an inhalation hose is connected and the other side to which an exhalation hose is connected; an exhaled breath storing container storing exhaled breath; a filter removing carbon dioxide; an inhaled breath storing container storing the air having passed through the filter; an oxygen storing container supplying oxygen to the inhalation storing container; a decompressor installed at an inlet of the oxygen storing container; an oxygen mixing module mixing the oxygen discharged through the oxygen supplying hose with the air; and a controller controlling operations of the exhaled breath storing container, the inhaled breath storing container, the oxygen storing container, the filter, and the oxygen mixing module.

The invention discloses a multifunctional device and method for early warning of dangers, self rescue and occupational disease prevention. The multifunctional device comprises a vibration detector and a physiotherapeutic coat, wherein the vibration detector is used for generating charges by compressing minerals so as to detect vibration; and the physiotherapeutic coat is used for carrying out quantitative physiotherapy on a human body by detecting the amount of the charges. The multifunctional device and method disclosed by the invention have the advantages that the structure is simple and comprises the vibration detector and the physiotherapeutic coat; the concentration of toxic and harmful gases and the vibration of the environment can be monitored in real time, and when the concentration of the toxic gases or the vibration amplitude exceeds a safety threshold, in-time alarming can be achieved and convenience can be brought for operators to take measures to avoid extension of accidents. When persons cannot evacuate safely, the trapped persons can live by an oxygen-inhaling device on the multifunctional device so as to be conductive to self rescue and being rescued. In addition to emergency situations, the multifunctional device and method can be used for carrying out massaging and physiotherapy on workers in the process of daily operation so as to relieve the injury of high-intensity work for body health of the workers and prevent the occurrence of occupational diseases.

Systems and methods to estimate, on a breath-by-breath basis, the fraction of inhaled oxygen during ventilation of a subject. The fraction of inhaled oxygen may be based on exhaled tidal volume, a volume of dead space within the subject interface, leaked exhalation volume, and subsequently inhaled tidal volume and leaked inhalation volume.

The invention discloses an oxygen mask having a humidifying function. The oxygen mask having the humidifying function comprises an oxygen mask, a humidifying device and an air duct; the humidifying device is connected to the tail end of the oxygen mask; the air duct is connected to the tail end of the humidifying device; an oxygen bottle is connected outside the air duct; the humidifying device comprises an atomizing cabin and a liquid cabin; the rear surface of the atomizing cabin clings to the front surface of the liquid cabin; an atomizing component is arranged in the inner cavity of the liquid cabin; an atomizing core is connected to one end of the atomizing component; a power supply is connected to the tail end of the atomizing core; the power supply is electrically connected to a switch component; the switch component is electrically connected to a switch button; and the switch button is arranged on the outer surface of the liquid cabin. By virtue of the humidifying device which is arranged on the joint of the oxygen mask and the air duct, after oxygen inhaled by a user passes through the humidifying device, humidify of the oxygen is enhanced, so that discomfort in respiratory tract of the user caused by dryness is avoided.

The invention relates to a medical instrument, particularly provides oxygen-supply resuscitation respiratory equipment, and aims at solving the problems that an existing oxygen inhaling device cannot achieve a smooth transition from the inhaling process to the exhaling process, and too much noise exists. For this purpose, the respiratory equipment comprises a needle valve assembly arranged between a main oxygen inhaling channel and an inner cavity, the needle valve assembly comprises a needle valve fixing seat, a needle valve sleeve which is embedded in the needle valve fixing seat in a sleeved mode, a needle valve matched in the needle valve sleeve in a sliding mode, a needle valve sealing ring which is embedded in the needle valve sleeve in a sealed and sleeved mode and a needle valve spring which is arranged between the top end of the needle valve sleeve and the top end of the needle valve, and multiple air inlets are formed in the needle valve sleeve. In the non-operating state, a piston valve abuts against the top end of the needle valve under the action of a piston valve spring and compresses the needle valve spring, and therefore the needle valve sleeve does not make contact with the needle valve sealing ring. Accordingly, by means of the needle valve, the smooth transition from the inhaling process to the exhaling process can be achieved, and the noise problem related to the prior art is eliminated.

The invention discloses a bottle body / bag body for containing an oxygen generating agent, a net fence for bearing bagged auxiliaries is arranged on the upper portion of the bottle body / bag body, and a film sealing hole is arranged on a sealing outer cover of the bottle body / bag body. An inner sealing film is arranged in the bottle body / bag body between the outer cover and the net fence. The novel portable oxygen supplying device uses an organic oxygen generating agent and does not pollute environment and oxygen inhaling people, is small in volume of an oxygen generating device and convenient to carry, can be put in a pocket, is low in construction cost and suitable for oxygen supplying of any population groups and different environments, and is an ideal and novel oxygen supplying device and a novel product.

The invention discloses a disposal oxygen inhaling humidifying bottle, and relates to the technical field of medical instruments. The bottle comprises a bottle body, a bottle cap and an air inlet pipe, the air inlet pipe penetrates through the bottle cap and extends to the bottom of the bottle body, an air outlet pipe is arranged on the bottle cap, the bottle cap is further provided with a liquidadding pipe, the liquid adding pipe penetrates through the bottle cap and extends to the interior of the bottle body, a sealing cover is in threaded connection with the exterior of the liquid adding pipe, a rubber plug is arranged in the liquid adding pipe, a liquid adding balancing device which can move along the side wall of the liquid adding pipe is arranged between the rubber plug and the sealing cover, the liquid adding balancing device comprises a connecting plate, a humidifying liquid pipe and an air pressure balancing pipe, and the humidifying liquid pipe and the air pressure balancingpipe fixedly penetrate through the connecting plate. According to the disposal oxygen inhaling humidifying bottle, normal oxygen inhaling use of a patient when liquid adding is conducted is not affected by the oxygen inhaling humidifying bottle, consecutive oxygen inhaling is achieved, and the oxygen inhaling humidifying bottle has the advantage of improving the oxygen inhaling comfort of the patient.

The invention relates to the technical field of expiration training devices. The invention discloses a lung expiration training device for cardiothoracic surgery patient nursing. The device comprisesa housing, the inner surface of the housing is fixedly connected with an expiration bag, an airflow groove is formed in the expiration bag, an air inlet plate is fixedly connected to the joint of thehousing and the expiration bag, the side, away from the expiration bag, of the air inlet plate is movably connected with an air nozzle, the end, away from the air inlet plate, of the air nozzle is movably connected with a boosting box, fan blades are movably connected to the upper side and the lower side of the boosting box, the end, away from the air nozzle, of the boosting box is movably connected with a rotating shaft, windward plates are movably connected to the upper and lower sides of the rotating shaft, a small amount of airflow with low oxygen content in the expiration bag is sucked tothe nose tip of the patient from the airflow groove, that is to say, content of oxygen inhaled by the patient is disturbed, and then respiratory organs of the patient are stimulated to inhale again,therefore, the effect of providing matched airflow assisting force according to the respiratory intensity of the patient to adjust the oxygen concentration to stimulate the cardio-pulmonary organs towork is achieved.

The invention discloses a multifunctional respiratory device for internal clinic. The multifunctional respiratory device comprises a pedestal. An electric telescopic rod is arranged on the upper surface of the pedestal; a first fixing ring is fixedly connected to the side surface of a fixed end of the electric telescopic rod; a second fixing rack is connected to the side surface of the first fixing ring; an oxygen tank is disposed in the second fixing rack; and an oxygen delivering hose is connected to the upper surface of the oxygen tank. The multifunctional respiratory device for the internal clinic is rationally structured and has great practicality; with a handle, a slide rod and a vomiting barrel, a patient can be facilitated upon a vomit; with an armrest, universal wheels and a brake, the multifunctional respiratory device can easily move and brake; the height of the device can be conveniently adjusted via the electric telescopic rod and a control switch; the patient can call forhelp upon an emergency via a call device; usual-use articles can be placed on a rubber pad; patient oxygen inhale can be facilitated via a breath face mask, the oxygen delivering hose and the oxygentank; and the multifunctional respiratory device for internal clinic is suitable for promotion and application.

The invention provides a gas mask. The gas mask comprises a body and a neck sleeve arranged at the bottom end of the body. A big eye widow and a gas defense base are fixedly arranged on the body. A fixing belt is arranged on the two sides of the gas defense base and fixedly provided with an adjusting buckle. A gas defense device is arranged at one end of the gas defense base. A first protective net, a second protective net and a third protective net are fixedly arranged in the gas defense device. An activated carbon layer is fixedly arranged between the first protective net and the second protective net. A sodium oxide layer is fixedly arranged between the second protective net and the third protective net. Airbags are symmetrically arranged on the two sides of the sodium oxide layer. The gas mask is simple in structure, low in making cost, convenient to use and high in practicality. Due to the arrangement of the adjusting buckle, the size of the fixing belt is conveniently adjusted through the adjusting buckle, and people in different sizes can conveniently use the gas mask. Due to the arrangement of the sodium oxide layer, exhalant carbon dioxide and sodium peroxide react to generate oxygen which is stored in the airbags, oxygen inhaled into the human body then passes through the sodium peroxide layer to form oxygen, and therefore the gas mask can be continuously used for gas defense for several days.