This table provides estimates of remaining time in minutes for various sizes of oxygen tanks filled to the given PSI when administered at the listed liters per minute. This table may help prepare for long distance transports by ensuring that the oxygen supply will last at the expected flow rate for a patient. Caution: These are estimated times and do not account for the need to increase flow rate, delays that extend expected travel time, or other variables. Agencies should ensure that there is a reasonable buffer when calculating oxygen supply for transports.
Example: In an ambulance with an M tank at 500 PSI on an interfacility transport with a patient receiving 6 lpm oxygen by simple face mask, it is estimated that the oxygen will last for 130 minutes.