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.

Multi-function masks are presented including: a mask body forming a chamber, where the mask body includes an inner surface, an outer surface, an edge portion, a first intake portion, a second intake portion, a third intake portion, and an exhaust outlet portion, where the first intake portion passes filtered ambient air, where the second intake portion passes filtered and vaporized air, and where the third intake portion passes any of a fluid or a pressurized gas; a flexible contact portion positioned along the edge portion of the mask body for tightly contacting the mask body to a face when worn; and a filter unit positioned along the outer surface of the mask body for providing filtered ambient air to the first and second intake portions and for filtering exhaust air from the exhaust outlet portion.

A monitoring system (100″) is for aeronautical personnel (99), such as aircraft operators, pilots, co-pilots or passengers of airplanes or aircraft, such as aircraft or helicopters of civil or military aviation, passenger aircraft in scheduled or charter traffic, in particular also ultra-fast aircraft. The monitoring system includes a sensor system (60) for a measurement-based monitoring of the gas concentration. The operation of the monitoring system (100″) can be configured by an external input/output unit (450) or an external output unit (460).

Embodiments relate generally to respirator face masks, and specifically to powered face masks which may be custom-controllable to better provide for the specific air needs of the individual user wearing the mask. For example, the face mask embodiments typically include a filter and a motorized fan, both generally located on the face mask itself, along with a processor. The processor then may use inputs, for example specific to the user and/or the environment, to control the fan speed. Thus, the fan speed of the face mask may be custom controlled to provide the appropriate amount of filtered air as the specific user needs it.

Example systems are described in which a personal protective equipment (PPE) respirator device includes one or more sensor arranged within the PPE to detect exhalation breath temperature of a user, and a computing device configured to generate, based on the detected exhalation breath temperature, a metric indicative of core body temperature of the user wearing the PPE.

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 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.

In some implementations, a device may receive sensor data from an electronics module associated with a face mask. The device may process a first set of measurements included in the sensor data to determine a user mask wearing pattern that indicates whether a user is wearing the face mask in compliance with guidelines related to reducing a risk of the user spreading a respiratory illness or a risk of the user contracting a respiratory illness. The device may process a second set of measurements included in the sensor data to determine a user breathing pattern that indicates whether the user is at risk of having a medical condition or at risk of experiencing respiratory fatigue. The device may generate one or more outputs that include information related to one or more of the user mask wearing pattern or the user breathing pattern.

A filter cartridge for a respirator includes an RFID chip encoding a digital change management policy (DCMP) indicating a useful lifespan of the cartridge, so that the cartridge may be replaced at the end of the useful lifespan. In some examples, a system includes a respirator comprising a facepiece and an air blower; a removable contaminant capture cartridge installed within the respirator and configured to remove contaminants from the air as the air passes through the contaminant capture cartridge, wherein the contaminant capture cartridge comprises a radio frequency identification (RFID) chip encoding a digital change management policy (DCMP) indicating a useful lifespan of the contaminant capture cartridge; and a computing device configured to read the DCMP from the RFID chip or write the DCMP to the RFID chip.

A SCBA with an air storage, a face piece with inner mask (nose cup), breathing regulator(s), a breathing valve, an exhalation valve operating at positive pressure relative to the ambient and a reservoir capable of storing the first part of an exhalation and delivering that part at the subsequent inhalation. The reservoir is positioned in the SCBA's face piece or in close proximity thereto, is in fluid contact with the inner mask, and has a shut-off valve controlled by a carbon-dioxide sensor. The operating pressure of the reservoir is maintained above ambient pressure and the operating pressure of the reservoir is between the opening pressure of the SCBA's breathing valve and the SCBA's exhalation valve.