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Factor VII Activity (Plasma)

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

This test measures the activity level of Factor VII, a protein involved in blood clotting. It helps assess bleeding disorders or clotting risks.

Quick summary

["Factor VII helps control bleeding; low levels may indicate bleeding risks or liver issues."]

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

Key facts at a glance

LOINC
3212-8
Short code
Fact VIII Xa Act PPP Chro-aCnc
Synonyms
Fact VIII Xa Act PPP Chro-aCnc
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
chromo
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 have symptoms of bleeding problems, such as excessive bruising, prolonged bleeding from cuts, or unexplained nosebleeds. It may also be used to monitor conditions like liver disease or after treatment for bleeding disorders.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. If you’re on blood-thinning medication, discuss it with your doctor beforehand.

What the Results Mean

Results are compared to a standard range, but exact values can vary by lab. Low levels of Factor VII may suggest bleeding disorders, liver disease, or vitamin K deficiency. High levels are less common but could indicate certain genetic conditions.

Common Conditions Monitored

This test is often used to diagnose or monitor bleeding disorders like hemophilia (though Factor VII is less commonly involved) or to evaluate liver function. It may also be checked after trauma or surgery to assess clotting risks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Factor VII Activity

Frequently asked questions

Will this test affect my medications?
Yes, certain blood-thinning medications (like warfarin) or vitamin K supplements can affect Factor VII levels. Always inform your doctor about all medications you’re taking.
How long will I need to wait for results?
Results are typically available within 1–3 business days, depending on your lab. Your doctor will discuss them with you during your follow-up visit.
Can I eat or drink before this test?
You can eat and drink normally before the test, as it’s a simple blood draw with no dietary restrictions.
  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