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HelpTest Code LAB289 Hematocrit
Clinical System Name
Hematocrit
Synonyms
HCT
LAB289
Sample Requirements
Specimen: Whole Blood
Container(s): Lavender/EDTA, *Heparinized Syringe acceptable from OR only
Preferred Vol: 1.0-3.0 mL
Minimum Vol: 0.5 mL Microtainer; 1.0 mL Macrotainer
Notes: A Lavender top/EDTA Macrotainer must contain at least 1.0 mL
Processing Instructions
Reject due to: Insufficient Quantity, Wrong Sample Collection, Clotted Sample, Age of specimen
Spin: N
Aliquot: N
Temp: RT
Storage location: Core 5 Fridge
Off-site collection: Store whole blood at room temperature and transport to Children's Lab immediately. Samples > 24 hours old may be rejected.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood | RT |
≤ 24 h |
| Whole Blood | 2-8 C |
≤ 48 h |
| -20 C or -70 C |
N |
Availability
| STAT | Performed | TAT |
|---|---|---|
| Y | 24/7 | 1 h |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Core Hematology
Phone Number: 206-987-2617 (Client Services)
CPT Codes
85014
Methodology
Method: Sysmex XN-3000 & XN-1000: cumulative pulse height detection
Analytical Volume: 0.25 mL whole blood
Reference Range
|
Test |
Sex |
Age Range |
Normal Range |
Unit |
|
Hematocrit |
Both |
0 - 3 Days |
45.0 - 67.0 |
% |
|
Hematocrit |
Both |
3 Days - 1 Week |
42.0 - 66.0 |
% |
|
Hematocrit |
Both |
1 - 2 Weeks |
39.0 - 63.0 |
% |
|
Hematocrit |
Both |
2 Weeks - 1 Month |
31.0 - 55.0 |
% |
|
Hematocrit |
Both |
1 - 2 Months |
28.0 - 42.0 |
% |
|
Hematocrit |
Both |
2 - 6 Months |
29.0 - 41.0 |
% |
|
Hematocrit |
Both |
6 Months - 2 Years |
33.0 - 39.0 |
% |
|
Hematocrit |
Both |
2 - 6 Years |
34.0 - 40.0 |
% |
|
Hematocrit |
Both |
6 - 12 Years |
35.0 - 45.0 |
% |
|
Hematocrit |
Female |
12 Years - Adult |
36.0 - 46.0 |
% |
|
Hematocrit |
Male |
12 - 18 Years |
37.0 - 49.0 |
% |
|
Hematocrit |
Male |
18 Years - Adult |
41.0 - 53.0 |
% |
Description
A hematocrit test determines the amount of red blood cells present in ratio to the total blood volume.
Hematocrit levels are useful in monitoring anemia, long term illness, infection, leukemia, lymphoma, vitamin/mineral deficiency, recent or long-term blood loss, hydration levels, lung disease, heart disease, and polycythemia vera.