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Antiplatelet Activity Monitoring Using Argatroban (Plasma-Based)

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

This test measures how argatroban, a medication used to prevent blood clots, affects your blood platelets in plasma. It helps doctors monitor your response to the drug during treatment.

Quick summary

["This test ensures your medication is working safely to prevent clots without excessive bleeding risk."]

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

Key facts at a glance

LOINC
73521-7
Short code
Argatroban ind plt IgM SerPl Ql FC
Synonyms
Argatroban ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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

Why This Test Is Done

Your doctor may order this test if you’re receiving argatroban, often for conditions like heart valve replacement or severe blood clotting disorders. It helps adjust your medication dose to balance clot prevention and bleeding risks.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample via a simple venipuncture (blood draw). The sample is processed to plasma for testing.

How the Test Works

Argatroban interferes with platelet function by blocking clotting proteins. The test measures how effectively this interference occurs over time, typically using a specialized blood-clotting assay.

What the Results Mean

Results indicate your platelet activity level under argatroban. Lower values suggest effective clot prevention, while higher values may signal insufficient medication or potential bleeding risk.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is critical for patients on argatroban to avoid complications like excessive bleeding or ineffective clot prevention. Abnormal results prompt dose adjustments or alternative treatments.

Short name

Argatroban Antiplatelet Test

Frequently asked questions

When will I get my results?
Results are usually available within 24–48 hours, depending on lab processing. Your doctor will discuss them with you during your next visit.
What does a ‘normal’ result mean?
A ‘normal’ result doesn’t have a fixed range—it’s based on how your body responds to argatroban. Your doctor interprets it in relation to your specific treatment goals and symptoms.
Can I stop taking argatroban if my test results look okay?
No. Always follow your doctor’s instructions. Even if results seem fine, argatroban may still be needed to prevent clots. Stopping it abruptly could lead to dangerous blood clots.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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