Abstract: A rescue breathing apparatus is disclosed. The apparatus is an automatic rescue breathing unit (ARBU) device that includes two sub-systems—an airway device keying mechanism and a ventilation unit. The keying mechanism may trigger and determine breath profile and parameters delivered by the ventilation unit. The ARBU device may connect to an air/oxygen source via a pressure regulator. The ARBU device may include a manifold, a keying chamber, an adult channel for providing breath to adult patients, a child channel for providing breath to child patients, and an infant channel for providing breath to infant patients. The ARBU device may also include a constant flow channel.

Abstract: A rescue breathing apparatus is disclosed. The apparatus is an automatic rescue breathing unit (ARBU) device that includes two sub-systems—an airway device keying mechanism and a ventilation unit. The keying mechanism may trigger and determine breath profile and parameters delivered by the ventilation unit. The ARBU device may connect to an air/oxygen source via a pressure regulator. The ARBU device may include a manifold, a keying chamber, an adult channel for providing breath to adult patients, a child channel for providing breath to child patients, and an infant channel for providing breath to infant patients. The ARBU device may also include a constant flow channel.

Abstract: Digital data broadcasting is performed by analyzing propagation characteristics in a broadcast propagation area to determine a rebroadcasting strategy. Data packets are broadcast, and at least one of the data packets is selectively rebroadcast, to broadcast receiving stations in the broadcast propagation area according to the rebroadcasting strategy that was determined. The analyzing, broadcasting and selectively rebroadcasting are performed independent of receiving acknowledgements that data packets have or have not been received. The rebroadcasting strategy may be determined by measuring a received signal quality of broadcast data packets at multiple locations in the broadcast propagation area and/or by simulation of the propagation characteristics based on a model of the broadcast propagation area.