A system may include an oxygen mask. The oxygen mask may include an oxygen supply structure. The oxygen mask may include a face seal extending away from the oxygen supply structure, wherein the face seal forms an outer opening configured to seal around a first portion of a first face of a first user of the oxygen mask, wherein a channel is formed by the face seal between the outer opening and the oxygen supply structure. The oxygen mask may include a lip seal positioned within the channel and positioned between the outer opening and the oxygen supply structure, wherein the lip seal forms a second opening configured to seal around a second portion of a second face of a second user of the oxygen mask, wherein the second opening is smaller than the outer opening, wherein the second face is smaller than the first face.

A wearable device for comprehensive bio-monitoring of physiologic metrics to determine metabolic, pulmonary and cardiac function and oxygen saturation measurements from breathing mask apparatuses. The device non-invasively monitors the physiologic profile of the subject, and is capable of detecting physiologic changes, predicting onset of symptoms, and alerting the wearer or another person or system. In some embodiments, the device comprises both a wearable sensor suite and a portable gas composition and flow analysis system. In preferred embodiments, it comprises a miniaturized non-invasive sensor suite for detecting physiologic changes to detect dangerous breathing or other health conditions. The acquired physiologic profile is used to generate alarms or warnings based on detectable physiological changes, to adjust gas delivery to the subject, alter mission profiles, or to transfer control of the craft or other duties away from a debilitated subject. The device is compact, portable, vehicle independent and non-encumbering to the subject.

A wearable device for comprehensive bio-monitoring of physiologic metrics to determine metabolic, pulmonary and cardiac function and oxygen saturation measurements from breathing mask apparatuses. The device non-invasively monitors the physiologic profile of the subject, and is capable of detecting physiologic changes, predicting onset of symptoms, and alerting the wearer or another person or system. In some embodiments, the device comprises both a wearable sensor suite and a portable gas composition and flow analysis system. In preferred embodiments, it comprises a miniaturized non-invasive sensor suite for detecting physiologic changes to detect dangerous breathing or other health conditions. The acquired physiologic profile is used to generate alarms or warnings based on detectable physiological changes, to adjust gas delivery to the subject, alter mission profiles, or to transfer control of the craft or other duties away from a debilitated subject. The device is compact, portable, vehicle independent and non-encumbering to the subject.

A modular, multi-crew life support system and a method of assembling the system involve a fan to draw in ambient air. The system includes one or more assemblies that produce conditioned air from the ambient air, and a housing to support an oxygen source. The system also includes a port configured as an inlet from the oxygen source to augment the conditioned air, and a duct to disperse a result of augmenting the conditioned air as output air to support two or more occupants of an enclosure.

There is provided an apparatus for preparing a ventilation gas mixture that comprises a gas mixing device, a first gas feed arranged to supply a first gas to the gas mixing device, an air inlet configured to receive exhaled air from a person, a gas reservoir arranged to store carbon dioxide from the air received in the air inlet and further arranged to supply the stored carbon dioxide to the gas mixing device via a second gas feed, wherein the gas mixing device is arranged to combine the first gas with the carbon dioxide in order to prepare the ventilation gas mixture.

There is provided an apparatus for preparing a ventilation gas mixture that comprises a gas mixing device, a first gas feed arranged to supply a first gas to the gas mixing device, an air inlet configured to receive exhaled air from a person, a gas reservoir arranged to store carbon dioxide from the air received in the air inlet and further arranged to supply the stored carbon dioxide to the gas mixing device via a second gas feed, wherein the gas mixing device is arranged to combine the first gas with the carbon dioxide in order to prepare the ventilation gas mixture.

A respiratory protection hood having a sealed flexible shell including a pressurized oxygen vessel provided with a calibrated output opening leading into the inside space of the flexible shell and a device for trapping at least one portion of the carbon dioxide exhaled by the user that includes a cartridge for adsorbing carbon dioxide having a perforated tube arranged around a volume of carbon dioxide absorbing material. At least one portion of the perforated tube being arranged around the volume of absorbent material in direct communication with the inside space of the hood.

The present disclosure relates to an emergency oxygen system (1) for an aircraft passenger with an oxygen mask (7), a controllable oxygen feed for the oxygen mask (7), and a control unit (5) for the control of the oxygen feed to the oxygen mask (7),
wherein the control unit (5) is configured to control the oxygen feed in a manner such that a demand oxygen pulse (21) flows into the oxygen mask (7) if a draw of breath (20) of the aircraft passenger is registered and that safety oxygen pulses (23) regularly flow into the oxygen mask (7) if no draw of breath of the aircraft passenger has been registered within a certain time window (T).

The present disclosure relates to an emergency oxygen system (1) for an aircraft passenger with an oxygen mask (7), a controllable oxygen feed for the oxygen mask (7), and a control unit (5) for the control of the oxygen feed to the oxygen mask (7),
wherein the control unit (5) is configured to control the oxygen feed in a manner such that a demand oxygen pulse (21) flows into the oxygen mask (7) if a draw of breath (20) of the aircraft passenger is registered and that safety oxygen pulses (23) regularly flow into the oxygen mask (7) if no draw of breath of the aircraft passenger has been registered within a certain time window (T).

A method of detecting hypoxia. Detecting hypoxia includes detecting, in exhaled breath, at least one indicator for hypoxia. The at least one indicator is selected from the group consisting of pentanal, 2-pentanone, 2-hexanone, 2-heptanone, 2-cyclopenten-1-one, and 4-butyrolactone.