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HelpTest Code LAB301 Platelet Count
Clinical System Name
Platelet Count
Synonyms
PLT
LAB301
Sample Requirements
Specimen: Whole Blood
Container(s): Lavender/EDTA *Heparinized Syringe for OR orders 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
85049
Methodology
Method: Sysmex XN-3000 & XN-1000: Fluorescent Flow Cytometry with Platelet Specific Dyes.
Analytical Volume: 0.25 mL
Reference Range
|
Test |
Sex |
Age Range |
Normal Range |
Unit |
|
Platelets |
Both |
0 - 3 Days |
250 - 450 |
K/CMM |
|
Platelets |
Both |
3 - 9 Days |
200 - 400 |
K/CMM |
|
Platelets |
Both |
9 Days - 1 Month |
170 - 600 |
K/CMM |
|
Platelets |
Both |
1 - 6 Months |
190 - 660 |
K/CMM |
|
Platelets |
Both |
6 Months - 2 Years |
190 - 610 |
K/CMM |
|
Platelets |
Both |
2 - 8 Years |
160 - 500 |
K/CMM |
|
Platelets |
Both |
8 - 12 Years |
155 - 430 |
K/CMM |
|
Platelets |
Both |
12 Years - Adult |
140 - 400 |
K/CMM |
Reference ranges update 6/6/2022.
Source: Internal data, retrospective analysis.
Description
A platelet count is useful in monitoring and/or screening for various diseases, disorders, and drug therapies that affect the number of platelets in the blood.
Critical Values
|
Platelets (PLT) |
< 30,000/CMM or >1,000,000/CMM |