Clinics and Departments

Laboratory Services

Lab Dept:

Hematology

Test Name:

HEMATOCRIT

General Information

Lab Order Codes:

HCT

Synonyms:

Whole Blood Hematocrit; Microhematocrit; Packed Cell Volume; PCV

CPT Codes:

85014 – Blood count; Other than spun hematocrit

Test Includes:

Hematocrit reported as a %.

Logistics

Test Indications:

Useful for evaluating anemia, blood loss, hemolytic anemia, polycythemia, and state of hydration, etc.

Lab Testing Sections:

Hematology

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

2 hours

Special Instructions:

N/A

Specimen

Specimen Type:

Whole blood

Container:

Lavender top tube (EDTA) or Lavender MicrotainerŽ

Draw Volume:

2 mL in a Lavender tube or 0.5 mL in a Lavender MicrotainerŽ

Processed Volume:

Same as Draw Volume

Collection:

Fill to mark on tube or MicrotainerŽ. Mix thoroughly by gentle inversion.

Special Processing:

Lab Staff: Do Not centrifuge

Patient Preparation:

None

Sample Rejection:

Improper tube; clotted sample; underfilled tube; mislabeled or unlabeled specimens

Interpretive

Reference Range:

Age and sex dependent; Refer to CBC Reference Value Table

Critical Values:

<21% and >65%

Limitations:

Falsely high results may occur with cryoproteins, significant leukocytosis, and giant platelets. False low results may be seen with microcytosis, in vitro hemolysis or with autoagglutinins.

Methodology:

Automated cell counter; calculated (HCT = RBC x MCV)

References:

Harmening DH (1997) Clinical Hematology and Fundamentals of Hemostasis, 3rd ed

Updates:

2/17/2005: Critical values previously listed as 0-7 days: <35/>65%, 8-28 days: <30/>65%, >28 days: <25/>65%.



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