Fetal Maximum Systolic Blood Pressure (via Doppler Ultrasound)
This test measures the highest blood pressure reading detected in a fetal heart during a prenatal ultrasound using Doppler technology.
["Assists healthcare providers in assessing fetal circulation during pregnancy."]
Key facts at a glance
- LOINC
- 11705-1
- Short code
- Fet AV Vmax sys DOP
- Synonyms
- Fet AV Vmax sys DOP
- Category
- chemistry
- 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 This Test Measures
The Doppler ultrasound uses sound waves to detect blood flow through the fetal heart and major vessels. The test specifically identifies the highest systolic pressure recorded during fetal circulation, which can vary based on gestational age and fetal health status. This measurement helps evaluate the fetal cardiovascular system’s function and identify potential issues early in pregnancy.
Why It’s Performed
Doctors may order this test if there are concerns about fetal growth restrictions, placental insufficiency, or other conditions that could affect blood flow. It’s often part of routine prenatal care or monitoring for high-risk pregnancies.
How It’s Done
A trained technician applies gel to the mother’s abdomen and places a transducer on the skin to detect fetal heart sounds. The Doppler device emits sound waves that bounce off fetal blood cells, creating a reading of the systolic pressure in the fetal heart.
What to Expect
The procedure is quick and painless. You may feel a slight pressure or vibration as the transducer moves across your abdomen. The test usually takes about 10–20 minutes, and no special preparation is needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated or abnormal systolic pressure readings may signal conditions like placental insufficiency, fetal growth restriction, or other vascular issues. While fetal blood pressure isn’t always directly linked to maternal health, it can help identify risks that may require further monitoring or intervention.
Frequently asked questions
When might this test be done?
What do the results mean?
Is this test safe?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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