Skip to content

Factor VII Activity (Prothrombin Complex Concentrate-Standardized)

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

This test measures the activity level of Factor VII, a protein essential for blood clotting. It helps assess how well your blood can form clots and may be used to monitor treatment for bleeding disorders.

Quick summary

["Factor VII activity helps evaluate bleeding risks and treatment effectiveness for clotting disorders."]

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

Key facts at a glance

LOINC
90919-2
Short code
Fact VIII.recomb.bound/vWF Ag Plas IA
Synonyms
Fact VIII.recomb.bound/vWF Ag Plas IA
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
ia
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 patients receiving Factor VII replacement therapy or those with inherited bleeding disorders like hemophilia or von Willebrand disease.

What to Expect Before the Test

No special preparation is needed. You may have a blood sample drawn from a vein in your arm by a healthcare professional. If you’re on anticoagulant medication, let your doctor know before the test.

How the Test Results Are Interpreted

Results are typically reported as a percentage of normal activity. Lower levels may indicate bleeding risks, while higher levels might suggest potential clotting issues. Your doctor will interpret results in the context of your medical history and symptoms.

Common Conditions Monitored

This test is often used to diagnose or monitor bleeding disorders, evaluate liver disease (since Factor VII is produced in the liver), or assess response to Factor VII replacement therapy in patients with inherited clotting deficiencies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Factor VII Activity

Frequently asked questions

What does a low Factor VII activity level mean?
A low Factor VII activity level may suggest bleeding tendencies, liver disease, or certain inherited clotting disorders. Your doctor may recommend further testing or treatment adjustments based on the results.
How does Factor VII activity change with treatment?
If you’re receiving Factor VII replacement therapy, your activity levels may stabilize or increase over time as the treatment works. Regular monitoring helps ensure safe and effective dosing.
Can diet or lifestyle affect Factor VII activity?
Dietary factors like vitamin K intake can influence clotting factors, including Factor VII. However, this test specifically measures activity, not synthesis, so lifestyle changes may not directly alter test results unless they impact liver function or bleeding risk.
  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