Hematocrit

Test Overview

Test Methodology

Sysmex XN9000 or manual spun method for capillary tubes

Test Usage

Evaluation of potential anemia or blood loss.

Reference Range*

Updated March 2018

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Daily, 24 hours

Analytic Time

STAT: 1 hour; Routine: 4 - 8 hours

Soft Order Code

HCT

MiChart Code

Hematocrit

Synonyms

H & H
Blood Survey, Hematocrit
HEMATOCRIT
HCT

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Laboratory

Hematopathology

STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

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Specimen Requirements

Offsite Collection Instructions

Collect specimen in a lavender top EDTA K2 Vacutainer® tube or EDTA K2 Microtainer® tube. Three heparinized capillary tubes may also be filled 1/2 to 2/3 full, plugged, and placed together into a capped tube for transport. Send intact within 24 hours of collection if stored at room temperature or within 48 hours if stored refrigerated. Capillary tubes are acceptable only for manual spun Hematocrit (HCT).

Rejection Criteria

Specimens clotted, diluted with IV fluid, containing fibrin strands and clumped platelets, or in underfilled or improper tubes will be rejected. Overfilled capillary tubes will be rejected.

Container

Normal Volume

3 ml EDTA K2 whole blood in Vacutainer® tube or 500 µl EDTA K2 whole blood in Microtainer® tube

Minimum Volume

1 ml EDTA K2 whole blood in Vacutainer® tube or 300 µl EDTA K2 whole blood in Microtainer® tube