An electronic vaporizer system includes an anesthetic sump containing anesthetic agent, a vaporizer unit that vaporizes the anesthetic agent from the sump and delivers the vaporized agent to a patient breathing circuit, and a gas sensor configured to measure end tidal concentration of the anesthetic agent and exhalation gasses from the patient. A control system is configured to receive the measured end tidal concentration of anesthetic agent and compare the measured end tidal concentration to a desired end tidal concentration to be maintained for the patient. The vaporizer unit is then automatically controlled to deliver an amount of vaporized agent to the patient based on the comparison.

The present invention relates to provide, among other things, the methods, devices, and systems that can simply and quickly collecting and analyzing a tiny amount of vapor condensates (e.g. exhaled breath condensate (EBC)).

The present disclosure relates to a method for continuous and noninvasive estimation of mixed venous blood saturation [SvO2] in a mechanically ventilated subject (3). The method comprises the steps of measuring (S1; S10) an expiratory carbon dioxide [CO2] content in expiration gas exhaled by the subject, measuring (S2; S20) an expiratory flow or volume of expiration gas exhaled by the subject, estimating (S3; S30) a cardiac output [CO] or an effective pulmonary blood flow [EPBF] of the subject from the measured expiratory CO2 content and the measured expiratory flow or volume using a capnodynamic Fick method, and estimating (S4; S40) SvO2 based on the estimated CO or the EPBF of the subject.

The invention refers to a patch cable for connecting a respiratory module (103) to a breathing adapter (101) being, e.g., part of a capnography system. The patch cable (110) comprises a) a module connector (113), b) an adapter connector (114) comprising a light detector, c) a light guide, and d) an electric cable for directing an electric detection signal generated by the light detector from the adapter connector to the module connector. The adapter connector is configured such that an end of the light guide is positioned to provide the light into a gas cavity of the breathing adapter. The adapter connector is adapted such that the light detector detects light provided by the end of the light guide that has interacted with the gas provided in the gas cavity, when the adapter connector is connected to the breathing adapter. This, allows to improve the accuracy of respiratory gas detection.

A conventional flow tube for a metabolic cart is usually a straight length of pipe whose inner diameter is fixed by the respiratory burden imposed by the flow tube on the user, with a smaller diameter imposing a higher respiratory burden. The ratio of the straight flow tube's length to diameter is fixed by fluid dynamics, so increasing the flow tube's diameter causes the flow tube's length to increase. As the flow tube gets longer, it exerts more torque on the user's neck and jaw, creating discomfort. Reducing the flow tube's length causes an undesired increase in the respiratory burden but increasing the flow tube's diameter to reduce the respiratory burden makes the flow tube less comfortable, making the flow tube unconformable, hard to breathe through, or both. Bending the flow tube makes it possible to increase the flow tube's propagation length without increasing the flow tube's lever arm length.

The present invention relates to provide, among other things, the methods, devices, and systems that can simply and quickly collecting and analyzing a tiny amount of vapor condensates (e.g. exhaled breath condensate (EBC)).

A smart face mask comprising a mask body; a temperature sensor; a respiration sensor; and a transmitter for transmitting information from the temperature sensor, the respiration sensor and a geotracker to a smart phone or smart watch.

A universal respiratory detector for detecting a respiratory gas. The universal respiratory detector may include a plurality of layers with a visual indicator to quickly and reversibly change color to detect a respiratory gas parameter such as carbon dioxide. The color change may be visible from both sides of the detector. In some examples, the respiratory detector may be a biocompatible and conformable sticker for mounting on a person’s face or an oxygen delivery device.

A device and a method for metabolism monitoring of a user based on low-cost, energy-effective and ultra-compact metal-oxide semiconductor (MOS) sensor are provided. The device provides information on metabolism/nutrition/physical activity of the user based on measuring the MOS sensor resistance proportional to a ratio of oxygen (O2) to carbon dioxide (CO2) concentrations in exhaled air.

Devices and methods are provided for breath gas analysis when determining the difference in the concentrations of at least one gas in the exhaled breathing air on the one hand and in the ambient air on the other hand. The device may include at least one gas sensor, by means of which the concentration of a gas can be determined, and a line system, through whose lines the exhaled air to be examined, the ambient air and a calibrating gas can be selectively pumped to the gas sensor. The method may include feeding ambient air; feeding calibrating gas to the gas sensor; feeding exhaled air to the gas sensor; feeding calibrating gas to the gas sensor again; and feeding exhaled air to the gas sensor again.