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Flow Cytometry Study

Published: August 9, 2026Updated: August 16, 2026

This test uses a specialized machine to analyze cells in your blood or other body fluids by measuring their size, shape, and other characteristics. It helps detect abnormalities in cell populations, such as those seen in cancers, immune disorders, or blood disorders.

Quick summary

["Flow cytometry can help diagnose and monitor conditions by identifying unusual cell types in your blood or body fluids."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
33719-6
Short code
FLOWCYTOMETRYSTUDY
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does Flow Cytometry Measure?

Flow cytometry examines cells as they pass through a laser beam. The machine measures how cells scatter light and emit fluorescence, which helps identify different cell types and their characteristics. This includes checking for cell size, shape, internal structures, and surface markers that can indicate health or disease.

Common Uses of Flow Cytometry

This test is often used to diagnose blood cancers like leukemia or lymphoma, monitor immune responses, check for immune system disorders, and evaluate blood disorders such as anemia or thrombocytopenia. It may also be used in research or specialized clinical settings for rare conditions.

Sample Types and Preparation

Flow cytometry typically requires a small sample of blood (whole blood or plasma/serum) or other body fluids like cerebrospinal fluid. Your healthcare provider will take the sample in a sterile tube and send it to the lab, where it is prepared for analysis by the machine.

How the Test Works

The prepared sample is injected into the flow cytometer, a device that streams cells through a narrow tube. A laser or other light source illuminates the cells, and detectors measure how the cells scatter light and fluoresce. Different cell types and abnormalities produce unique patterns, which are recorded and analyzed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Flow Cytometry

Frequently asked questions

Why might my doctor order a flow cytometry study?
Your doctor may recommend this test if you have symptoms of a blood disorder, cancer, or immune-related condition, or if preliminary tests suggest an abnormality in your cells. It helps confirm diagnoses, guide treatment decisions, and monitor disease progression or response to treatment.
How long does it take to get results?
Results from flow cytometry can take several days to a couple of weeks, depending on the complexity of the analysis and the lab’s workload. Your doctor will discuss the results with you once they are ready.
Is there any preparation needed before the test?
No special preparation is usually required for a flow cytometry study. However, if your doctor has specific instructions, follow them carefully. Avoid certain medications or supplements that might interfere with the test results if advised by your provider.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy