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1-6 L/min, approximate concentration is 24%-44%
40%-60%, used short term and in emergency, need 5L to prevent rebreathing of exhaled air
provides concentrations of 60% to 75% with rate of 6-11L/min, a mask with a reservoir bag
partial rebreather mask
provides the highest concentration of the low-flow systems, can deliver a F102 greater than 90%, mask has one-way valve between the mask and the reservoir and two flaps over the exhalation ports, used most often with deteriorating respiratory status who might require intubation.
delivers the most accurate oxygen concentration, has a mechanism that pulls a specific amount of room air for each liter flow of oxygen.
a newer technique using positive-pressure ventilation to keep alveoli open and improve gas exchange without intubation
noninvasive positive-pressure ventilation
a long term method of delivering oxygen directly into lungs
transtracheal oxygen therapy
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