The flow of air and oxygen to deliver to a patient can be calculated if a total flow and percent oxygen are specified.
(1) total flow in L per minute
(2) percent oxygen to deliver (from 21 to 100)
oxygen flow in L/min =
= (total flow in L/min) * ((percent oxygen) - 21) / 79
• 79 = 100 - 21 (percent oxygen in oxygen supply, less oxygen in air)
air flow in L/min =
= (total flow) - (oxygen flow)
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Purpose: To determine the oxygen and air flow to deliver to a patient if the total gas flow and oxygen percent are specified.
Objective: other testing