Davis's Lab & Diagnostic Tests

Complete Blood Count, Hematocrit

Complete Blood Count, Hematocrit is a topic covered in the Davis's Lab & Diagnostic Tests.

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Packed cell volume (PCV), Hct.

Common Use:
To evaluate anemia, polycythemia, and hydration status and to monitor therapy.

Whole blood from one full lavender-top (EDTA) tube, Microtainer, or capillary. Whole blood from a green-top (lithium or sodium heparin) tube may also be submitted.

Normal Findings:
(Method: Automated, computerized, multichannel analyzers)

AgeConventional Units (%)SI Units (Conventional Units × 0.01) (Volume Fraction)
Cord blood42–620.42–0.62
0–1 wk46–680.46–0.68
2–3 wk41–560.41–0.56
1–2 mo39–590.39–0.59
3–6 mo35–490.35–0.49
7 mo–1 yr31–430.31–0.43
2–6 yr30–400.3–0.4
7–15 yr32–420.32–0.42
16–18 yr33–450.33–0.45
Pregnant Female
 1st Trimester35–420.35–0.42
 2nd and 3rd Trimester28–330.28–0.33
Values are slightly lower in older adults.Reference range values may vary between laboratories.

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