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Hepatic Vein Doppler Ultrasound — Maximal Velocity (Vmax), Systolic and Diastolic, Expiration

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

A Doppler ultrasound measures blood-flow speed and wave patterns in the hepatic veins during expiration to help evaluate liver venous flow.

Quick summary

["This test assesses blood flow through the hepatic veins and may help identify congestion or other flow abnormalities."]

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

Key facts at a glance

LOINC
29481-9
Short code
Hep v Vmax sys/dias exp DOP
Synonyms
Hep v Vmax sys/dias exp DOP
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-doppler
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 is this test?

Hepatic vein Doppler ultrasound is an imaging test that uses sound waves to measure the speed and pattern of blood flow in the veins that carry blood from the liver.

Why might I need this test?

It may be ordered to evaluate liver blood flow, symptoms suggesting venous congestion, or findings that may affect the heart, liver, or portal circulation.

How is the test performed?

You lie on your back while a technician applies gel to the upper-right abdomen and moves a probe over the liver. The ultrasound records hepatic vein flow, including maximal velocity and systolic and diastolic patterns.

How do I prepare for the test?

No fasting is usually required. Wear comfortable clothing, and follow any special instructions provided by the imaging center, particularly if breathing maneuvers are part of the examination.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hepatic venous Doppler

Frequently asked questions

Is this the same as an abdominal ultrasound?
It uses ultrasound technology, but Doppler specifically measures the direction and speed of blood flow in the hepatic veins.
Does the test involve radiation or needles?
No. It uses sound waves, involves no radiation, and does not require a needle or contrast injection.
Will I need to hold my breath during the test?
You may be asked to breathe in a controlled way or briefly hold your breath so the measurements are consistent. The technologist will explain the instructions during the scan.
  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