Inogen TAV - Appendix B: Altitude Compensation

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Appendix B: Altitude Compensation
The TAV® system’s ow output can vary if the system is used in locations that are signicantly
above or below sea level. The following table allows you to estimate the amount of change in
the ow. Depending on the altitude of your location, the actual ow rate will be increased or
decreased by the indicated percentage.
Approximate Error in Delivered O2
Altitude
(feet)
Pressure
(mbar)
Pulse Mode
Tidal Assist
Mode
Constant Mode
-2000 1088 3% 1% 5%
0 1013 0% 0% 1%
500 995 0% 0% 0%
1000 977 -1% -1% -1%
2000 942 -2% -1% -3%
4000 874 -5% -3% -6%
6000 810 -7% -4% -10%
8000 751 -10% -6% -13%
10000 695 -12% -7% -16%
12000 643 -15% -8% -20%
14000 595 -18% -10% -23%
Examples:
1. The ow setting on your TAV® device is set at 3 lpm and the altitude is 4,000 ft.
Find 4,000 feet on the table:
º Pulse Mode change = 5% (Volumes will be about 5% lower compared with sea
level)
º Tidal Assist Mode change = 3% (Volumes will be about 3% lower compared with
sea level)
º Constant Mode change = 6% (Flows will be about 6% lower compared with sea
level)
2. The ow setting on your TAV® device is set at 4 lpm and the altitude is 7,000 ft.
Average the 6,000 and 8,000 foot entries in the table:
º Pulse Mode change = -8.5%
º Tidal Assist Mode change = 5%
º Constant Mode change = -11.5%