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  2. Halcyon PVR-BASC - Wikipedia

    en.wikipedia.org/wiki/Halcyon_PVR-BASC

    The fresh gas is added when the counterlung cover bottoms out towards the end of a breath, so the fresh gas is largely inhaled into respiratory dead space, and most of the mixing occurs after exhalation. Excess gas due to expansion during ascent is vented through the overpressure relief valve.

  3. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    Breathing gas supply may be surface supplied by umbilical, or from a rebreather carried on the suit. An emergency gas supply rebreather may also be fitted to a suit with either surface supply or rebreather for primary breathing gas. As the internal pressure is maintained at one atmosphere, there is no risk of acute oxygen toxicity.

  4. Category:Rebreathers - Wikipedia

    en.wikipedia.org/wiki/Category:Rebreathers

    This is a list of makes of rebreather breathing sets, and equipment that incorporates a rebreather. Subcategories. This category has the following 2 subcategories ...

  5. Halcyon RB80 - Wikipedia

    en.wikipedia.org/wiki/Halcyon_RB80

    The Halcyon RB80 is a non-depth-compensated passive addition semi-closed circuit rebreather of similar external dimensions to a standard AL80 scuba cylinder (11-litre, 207-bar aluminium cylinder, 185 mm diameter and about 660 mm long).

  6. Glossary of breathing apparatus terminology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_breathing...

    A non-rebreather mask (NRB) is a device used to deliver supplemental oxygen to a spontaneously breathing person. An NRB allows the delivery of relatively high concentrations of oxygen while using a constant flow rate, with relatively low waste, by accumulating the oxygen flow during exhalation in a soft bag, to be inhaled at the start of the ...

  7. Breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Breathing_apparatus

    The anaesthetic machine is commonly used together with a mechanical ventilator, breathing system, suction equipment, and patient monitoring devices; strictly speaking, the term "anaesthetic machine" refers only to the component which generates the gas flow, but modern machines usually integrate all these devices into one combined freestanding ...

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