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Heparin Anti-Xa Blood Text

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The Heparin Anti-Xa Blood Test is used to monitor heparin levels in the blood to help prevent any potential complications that may arise from heparin therapy.


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Test Code:


CPT Code(s):






No special preparation is required.

Test Results:

2-4 days. May take longer based on weather, holiday, or lab delays.

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

What is the purpose of this test?

The Heparin Anti-Xa Blood Test is a diagnostic test that is used to measure the concentration of heparin in the blood of patients who are being treated with heparin therapy. Heparin is a medication that is commonly used to prevent blood clots in patients who are at risk of developing them. The test measures the level of anti-Xa in the blood, which is an indicator of the amount of heparin present in the patient's bloodstream.

The test is performed by taking a blood sample from the patient and analyzing it in a laboratory using specialized equipment. The results of the test are reported in international units per milliliter (IU/mL) and are used to determine the appropriate dose of heparin for the patient. The test is also used to monitor the patient's response to heparin therapy and to ensure that they receive the correct medication dose. Overall, the Heparin Anti-Xa Blood Test is an essential diagnostic tool that plays a crucial role in ensuring that patients receive appropriate and effective heparin therapy. It provides healthcare providers with valuable information on the patient's heparin levels and helps to prevent potential complications associated with heparin therapy, such as bleeding or clotting.


Who would benefit from this test?

The Heparin Anti-Xa Blood Test would be beneficial for:

  • Patients who are undergoing heparin therapy
  • Patients who have a history of blood clots or deep vein thrombosis
  • Patients who have a history of pulmonary embolism
  • Patients who have a family history of blood clotting disorders
  • Patients who have a history of stroke or heart attack
  • Patients who have a history of atrial fibrillation or other heart rhythm disorders
  • Patients who have undergone major surgery or trauma
  • Patients who have liver or kidney disease


When should I order a Heparin Anti-Xa Blood Test?

A Heparin Anti-Xa Blood Test is usually ordered to monitor the effectiveness of Heparin therapy. Some symptoms that may indicate the need for this test include:

  • Unexplained bleeding or bruising
  • Shortness of breath
  • Chest pain
  • Rapid heartbeat
  • Confusion or dizziness
  • Severe headache
  • Abdominal pain or swelling
  • Numbness or weakness in limbs

Please note that this is not an exhaustive list, and other symptoms may also require a Heparin Anti-Xa Blood Test. It is always best to consult with a healthcare professional if you have concerns about your symptoms.

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