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Cardio IQ® Fibrinogen Antigen, Nephelometry Blood Test

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The Cardio IQ® Fibrinogen Antigen, Nephelometry Blood Test measures fibrinogen levels to evaluate an individual's risk of developing blood clots and assess their overall cardiovascular health.


Test Code:


CPT Code(s):







Overnight fasting is required.

Test Results:

4-5 days. May take longer based on weather, holiday, or lab delays.

Walk-In Lab is prohibited from selling Quest tests to residents in the following states:AZ, NY, NJ, RI

What is the purpose of this test?

The Cardio IQ® Fibrinogen Antigen, Nephelometry Blood Test is a significant diagnostic tool that helps healthcare providers evaluate a patient's cardiovascular health. This test measures the fibrinogen level in a patient's blood, a protein essential for blood clotting. The test results help healthcare providers identify patients who are at risk of developing blood clots, which can lead to severe conditions such as heart attack or stroke.


Fibrinogen levels in the blood may increase due to various factors such as smoking, obesity, pregnancy, or certain medical conditions. Therefore, this test is particularly useful in assessing the risk of blood clot development in patients with such conditions. The test is non-invasive and safe, involving the collection of a small blood sample to analyze the fibrinogen level.


Healthcare providers may prescribe medications such as blood thinners to prevent clot formation if the patient is at high risk of blood clotting. They may also suggest lifestyle changes such as regular exercise, a healthy diet, and quitting smoking to manage their health and prevent complications. The test results help healthcare providers make informed decisions about the appropriate treatment plan for the patient.


Overall, the Cardio IQ® Fibrinogen Antigen, Nephelometry Blood Test provides crucial information about a patient's cardiovascular health and the risk of blood clot development. It helps healthcare providers take preventive measures to manage the patient's health and avoid severe complications such as heart attacks or strokes.


What factors increase the risk of blood clotting?

Several factors can increase the risk of blood clotting, including:


  • Genetics
  • Obesity
  • Smoking 
  • Pregnancy
  • Certain medications
  • Prolonged periods of immobility 
  • Certain medical conditions, such as cancer, heart disease, and autoimmune disorders. 


It's important to talk to a healthcare provider about any concerns regarding blood clotting and to take steps to reduce the risk, such as staying active, maintaining a healthy weight, and avoiding smoking.


When should I order a Cardio IQ® Fibrinogen Antigen, Nephelometry Blood Test?

Individuals may order this test if they have experienced symptoms related to blood clotting. Common signs or symptoms related to blood clotting include:


  • Swelling, pain, or tenderness in the affected limb
  • Redness or discoloration of the affected area
  • Warmth in the affected area
  • Fatigue or weakness
  • Shortness of breath
  • Chest pain or discomfort
  • Rapid heartbeat or breathing
  • Dizziness or fainting
  • Headache or vision changes
  • Numbness or tingling in the affected area

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