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hematologyHas Critical Values
Hemoglobin
Hgb / Hb· also: Hb, HGB
Clinical Overview
Hemoglobin is the protein in red blood cells that carries oxygen throughout the body. It is the primary test for diagnosing anemia.
Reference RangesWHO/IFCC standards
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Male | 13.5 – 17.5 | g/dL | — |
| Adults (18–64) | Female | 12 – 15.5 | g/dL | — |
| Elderly (65+) | Male | 12.5 – 17 | g/dL | — |
| Elderly (65+) | Female | 11.5 – 15 | g/dL | — |
| Children / Pediatric | All | 11 – 16 | g/dL | Varies by age |
Also reported in: g/L, mmol/L.Conversion factor: 1 g/L = 10.000 g/dL.
Critical (Panic) Values
Critical Low: < 7 g/dL. Critical High: > 20 g/dL. Values outside these limits require immediate clinical attention.
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Related Topics
anemiaCBCoxygenred blood cells