Specimen Collection Manual and Test Catalog
HCT
Geisinger Epic Procedure Code: LAB2400 Geisinger Epic ID: 14462Whole blood
3 mL lavender-top (K2 EDTA) tube collected MUST be properly filled to at least 1.5 mL (half the fill volume of the tube).
Lavender-top (K2EDTA) microcollection tube MUST be properly filled to at least 250 uL (half the fill volume of the tube).
Do NOT centrifuge.
Refrigerated (preferred) or room temperature
Refrigerated: 72 hours. Room temperature: 24 hours.
Clotted, frozen, hemolyzed, underfilled, overfilled, or centrifuged samples. Samples beyond stability limits.
| Males | Females | |
| Adult | 39.1-49.5% | 36.0-45.2% |
| 12 y | 37.0-49.0% | 36.0-46.0% |
| 6 y | 35.0-45.0% | 35.0-45.0% |
| 2 y | 34.0-40.0% | 34.0-40.0% |
| 6 months | 33.0-39.0% | 33.0-39.0% |
| 3 months | 29.0-41.0% | 29.0-41.0% |
| 2 months | 28.0-42.0% | 28.0-42.0% |
| 1 month | 31.0-55.0% | 31.0-55.0% |
| 14 days | 39.0-63.0% | 39.0-63.0% |
| 7 days | 42.0-66.0% | 42.0-66.0% |
| Newborn | 45.0-67.0% | 45.0-67.0% |
Adult ranges established by normal study performed at GMC and GWV 8/2010.
Pediatric ranges from Nathan and Oski's "Hematology of Infancy and Childhood, 7th edition."
Potential related available add on testing includes: CBC with WBC differential (LAB1963), CBC (LAB1961), HGB (LAB2461), PLT (LAB2863); reticulocyte panel (LAB3006); immature platelet fraction (LAB2524) can only be added if sample is collected at testing laboratory;
See individual test requirements.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
HCT.
HCT, Crit, Hematocrit
This test, normally ordered as part of the complete blood count (CBC), measures the percentage of red blood cells in a given volume of whole blood and is used to evaluate anemia, polycythemia, dehydration, blood transfusion decisions for severe anemias and the effectiveness of those transfusions.