Hemoglobin and Hematocrit (H&H) on the NCLEX
Normal ranges, when to transfuse, anemia workup basics.
H&H is the most-checked lab. Transfusion thresholds tested heavily.
Normal ranges
Hemoglobin: 13.5-17.5 (men), 12.0-15.5 (women). Hematocrit: ~3× Hgb.
Transfusion thresholds
Hgb <7 generally. <8 in cardiac disease. Active bleeding: clinical context. Always with informed consent and proper crossmatch.
MCV interpretation
Low MCV (microcytic), iron deficiency, thalassemia. High MCV (macrocytic), B12/folate, alcohol, hypothyroidism. Normal MCV, anemia of chronic disease, acute blood loss, hemolysis.
Frequently asked
Transfuse asymptomatic Hgb 6.8?
Yes per restrictive threshold (<7).
Why check H&H before discharge?
Many causes of in-hospital blood loss, phlebotomy, occult bleed, surgery.
Quick check
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