An anesthesia machine, an anesthetic output concentration monitoring method, system, a device, and a storage medium are disclosed. The method includes respectively monitoring a flow of a fresh gas flowing into a breathing circuit and a flow of an inhaled gas of an anesthetized object. The method further includes when the inhaled gas flow is greater than a fresh gas flow, respectively monitoring a concentration of anesthetic in the inhaled gas and an exhaled gas of the anesthetized object. The method also includes using the exhaled gas anesthetic concentration and a concentration of carbon dioxide in the exhaled gas to calculate a concentration of anesthetic in a gas, reflowing into an inspiratory branch, in the exhaled gas, thereby obtaining a re-inhaled gas anesthetic concentration. The method additionally includes using the fresh gas flow, the inhaled gas flow, the inhaled gas anesthetic concentration, and the re-inhaled gas anesthetic concentration to calculate a concentration of output anesthetic of an anesthetic output device, thereby obtaining an anesthetic output concentration.

Provided are methods and devices useful for treating a respiratory disease or disorder involving the central or upper airways. The methods and devices deliver to central or upper airways of a subject a vapor or aerosol comprising an effective amount of an active ingredient selected from the group consisting of menthol, menthone, neomenthol, isomenthol, and menthofuran. The methods are useful for treating conditions including cough, asthma, bronchitis, and allergic rhinitis.

The invention relates to a breathing device (1), comprising a mouthpiece (2) forming a breathing channel to form a connection between a first (3) end and a second (4) end of the mouthpiece (2). The first (3) end is configured for a user breathing into the mouthpiece through a breathing opening (5). An at least partly flexible rebreathing air chamber (6) is arranged in fluid communication with the second (4) end of the mouthpiece, thereby being in fluid connection with the breathing channel through the second end of the mouthpiece (2). The rebreathing air chamber is formed by at least partly flexible wall section(s). A wall member (7) is arranged at the second (4) end of the mouthpiece and/or attached to the rebreathing air chamber (6). The wall member (7) comprises one or more through-going openings (8) provided in the wall member (7) and/or in the breathing channel, allowing fluid communication between the rebreathing air chamber (6) and the surrounding atmosphere.

A breathing device that warms inhaled air by absorbing the heat of exhaled air into one side of a metallic membrane that transfers that heat to incoming air on the other side of the membrane. Flow of inhaled and exhaled air is separated by the membrane and is controlled by check valves. The volume of exhaled air that must be inhaled again before getting any fresh air is thereby minimized. The primary purpose is to warm inhaled air, but sensors within it can facilitate gas analysis on exhaled air to diagnose and predict various diseases. An electric heater, vibrational de-icer, and humidifier are additional options.

An apparatus for supplying breathing air to a person includes a rebreathing system arranged in the air supply circuit, which removes CO.sub.2 at least in part present in the person's expiration air with a CO.sub.2 absorber, and treats the expiration air to supply treated air to the person again as inhalation air. The apparatus includes a condensate collection container (9) collecting water forming in the air supply circuit. The condensate collection container (9) is arranged at least in part below a reaction zone (17) of the CO.sub.2 absorber (1). At least one heat exchanger (10, 14) is provided in the CO.sub.2 absorber, via which heat from the air, which flows through the CO.sub.2 absorber and is heated as a result of the exothermic CO.sub.2 absorption reaction occurring in the reaction zone of the CO.sub.2 absorber, is dissipated.

A device including a first flow channel, a second flow channel and a body part including an inner volume. A first space of the inner volume is adapted to be filled with liquid and a second space of the inner volume is arranged to receive steam. The device further includes means for conveying a gas flow from the steam space of the inner volume via the first flow channel to the outside of the device during inhalation and means for conveying the exhaled gas flow from the outside of the device via the second flow channel to the first space of the inner volume. The device further includes means for measuring a flow and a temperature of an airflow, and means for adjusting the flow of the airflow mechanically and/or automatically. The present disclosure further relates to a method and a system.

This document provides methods and materials for treating hypocapnia. For example, methods and materials for delivering CO.sub.2 to a mammal to treat hypocapnia or compensate for a reduced level of CO.sub.2 are provided.

The invention relates to medical technology, to non-medicinal means for improving physical health and enhancing physical capabilities by means of a breathing system, and specifically relates to devices which are intended for inhaling hypoxic/hypercapnic mixtures having various compositions, and which have an adjustable resistance to inhalation/exhalation. According to a first variant, a breathing exerciser contains a first chamber, which is connected to means for connecting the exerciser to a user's respiratory tract; a second chamber, communicating with the first chamber; a third chamber, communicating with the second chamber; means for adjusting the composition of a breathing mixture; and means for adjusting the resistance to inhalation/exhalation, installed in a channel through which the first chamber and the second chamber communicate. The second chamber communicates with the atmosphere; the third chamber is elastic; means for regulating the composition of a breathing mixture are in the form of adjustable throttling devices installed in the channels through which the second chamber communicates with the third chamber and with the atmosphere; the means for adjusting the resistance to inhalation/exhalation are capable of separately and independently adjusting resistance to inhalation and resistance to exhalation. A second variant is characterized in that a first chamber communicates with a second chamber by means of two parallel channels, in that means for adjusting the resistance to inhalation/exhalation are installed in the parallel channels, and in that a breathing mixture is capable of passing through said channels in mutually opposite directions.

Provided are methods and devices useful for treating a respiratory disease or disorder involving the central or upper airways. The methods and devices deliver to central or upper airways of a subject a vapor or aerosol comprising an effective amount of an active ingredient selected from the group consisting of menthol, menthone, neomenthol, isomenthol, and menthofuran. The methods are useful for treating conditions including cough, asthma, bronchitis, and allergic rhinitis.

Gas flow control valves comprising a valve housing including a cylindrical interior passage, and a housing opening extending from the interior passage through the housing. The gas flow control valve further comprises a cylindrical rotary valve element including a sidewall, and a rotary valve element opening extending through the sidewall. The valve element is rotatably received within the interior passage of the valve housing, such that the housing opening may be selectively aligned with the rotary valve element opening, and an area of overlap of the housing opening and the valve element opening may be varied by rotating the valve element within the interior passage of the valve housing.