The World Health Organization (WHO) reported the impact of altitude on hemoglobin concentrations. Living at altitude may elevate a person's hemoglobin above that seen if the person lived at sea level.
Patient selection: residence at altitude over range from 1,000 to 4,500 meters
Parameters:
(1) altitude in meters above sea level
(2) measured hemoglobin in g/L
Altitude in Meters
Reduce Measured Hemoglobin by
1,000
2 g/L
1, 500
5 g/L
2,000
8 g/L
2,500
13 g/L
3,000
19 g/L
3,500
27 g/L
4,000
35 g/L
4,500
45 g/L
adjusted hemoglobin in g/L =
= (measured hemoglobin) - (correction value)
correction value over range from 1,000 to 4,500 meters =
= (2.476 * (X^2)) - (1.381 * (X)) + 1.071
where:
• X = (altitude in meters) / 1000
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