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2. Positive airway pressure - Wikipedia

   en.wikipedia.org/wiki/Positive_airway_pressure

   Increasingly, machines are capable of being powered by the 400-Hz power supply used on most commercial aircraft and include manual or automatic altitude adjustment. Machines may easily fit on a ventilator tray on the bottom or back of a power wheelchair with an external battery. Some machines allow power-inverter or car-battery powering.

3. Bubble CPAP - Wikipedia

   en.wikipedia.org/wiki/Bubble_CPAP

   1. Gas source: An oxygen blender connected to a source of oxygen and compressed air is used to supply an appropriate concentration of inspired oxygen . The humidified blended oxygen is then circulated through corrugated tubing. 2. Pressure generator: Pressure in the bubble CPAP system is created by placing the distal expiratory tubing in water.

4. Oxygen concentrator - Wikipedia

   en.wikipedia.org/wiki/Oxygen_concentrator

   This is a big advantage in mobile emergencies. The option to fill standard oxygen cylinders (e.g., 50 L at 200 bar = 10,000 L each) with high-pressure boosters, to ensure automatic failover to previously filled reserve cylinders and to ensure the oxygen supply chain, e.g., in case of power failure, is given with those systems.

5. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers. Small backup batteries may be primary cells ...

6. Diesel rotary uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Diesel_rotary...

   Most forms of uninterruptible power supply (UPS) can be either powered by battery or flywheel energy. These are ready for immediate use at the instant that the mains electricity fails, but the relatively small and finite amount of stored energy they contain makes them suitable for short periods of use, typically in the order of a few dozen minutes to a couple of hours depending on the actual load.

7. Anaesthetic machine - Wikipedia

   en.wikipedia.org/wiki/Anaesthetic_machine

   Older machines may lack some of the safety features and refinements present on newer machines. However, they were designed to be operated without mains electricity, using compressed gas power for the ventilator and suction apparatus. Modern machines often have battery backup, but may fail when this becomes depleted.