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Milrinone concentration in plasma (quantitative)

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

This test measures the amount of milrinone, a medication used to improve heart function, in your blood plasma. It helps doctors monitor how well your body is responding to this treatment.

Quick summary

["This test checks if your heart is getting the right dose of milrinone to support its pumping ability."]

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

Key facts at a glance

LOINC
73267-7
Short code
Milrinone ind plt IgM SerPl Ql FC
Synonyms
Milrinone 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 healthcare provider may order this test if you’re taking milrinone for conditions like heart failure or to improve heart function after a heart attack. It helps ensure the medication is working safely and effectively.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw a blood sample. The process usually takes a few minutes, and you may feel a brief pinch or discomfort.

What the Results Mean

Results help doctors adjust your milrinone dose if needed. Low levels might mean your heart isn’t responding well, while very high levels could indicate side effects like low blood pressure or irregular heartbeat.

Common Side Effects of Milrinone

Milrinone can cause side effects like low blood pressure, headaches, or nausea. Your doctor will monitor your levels closely to balance effectiveness with safety.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Milrinone is a phosphodiesterase inhibitor used primarily to improve heart function in patients with severe heart failure or after cardiac surgery. Elevated levels may signal toxicity or inadequate dosing, while low levels could indicate insufficient therapeutic effect. Regular monitoring is critical for managing this medication safely.

Short name

Milrinone Level

Frequently asked questions

Why do doctors check milrinone levels regularly?
Doctors check milrinone levels to ensure it’s working properly and to prevent side effects like low blood pressure or irregular heart rhythms. This helps them adjust your dose safely.
What happens if my milrinone level is too high?
If your level is too high, your doctor may reduce your dose or temporarily stop the medication to avoid serious side effects, such as dizziness or heart rhythm issues.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor instructs otherwise. No fasting is required for this blood test.
  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