Pericardial Fluid for AFB Smear/ZN Stain

Specimen Required

Pericardial Fluid

Fasting Required

Purpose of the Test

The Pericardial Fluid for AFB Smear/ZN Stain test is performed to detect the presence of acid-fast bacilli (AFB) in the pericardial fluid. This test is useful in diagnosing tuberculosis and other infections caused by AFB.

When this test is required

This test is typically requested when a patient presents with symptoms of pericarditis, such as chest pain, shortness of breath, or palpitations, and the healthcare provider suspects that the patient may have tuberculosis or another AFB infection. It may also be requested if the patient has been diagnosed with tuberculosis or has been in contact with someone who has the disease.

What the Test Detects

The Pericardial Fluid for AFB Smear/ZN Stain test is used to detect the presence of acid-fast bacilli (AFB) in the pericardial fluid, which is the fluid that surrounds the heart.

Preparation for the Test

No special preparation is needed for this test. However, you should inform your healthcare provider if you are taking any medications or have any medical conditions that may affect the test results.

Sample Requirements

A sample of pericardial fluid is required for this test. This fluid is obtained through a procedure called pericardiocentesis, in which a needle is inserted through the chest wall and into the pericardial sac to collect fluid.

Additional Notes

If the test results are positive for AFB, additional tests may be needed to confirm the diagnosis and determine the appropriate treatment. A positive result does not necessarily mean that the patient has tuberculosis, as other AFB infections can also cause a positive result. It is important to inform your healthcare provider if you are taking any medications or have any medical conditions that may affect the test results. Additionally, it is important to follow all instructions provided by your healthcare provider regarding the pericardiocentesis procedure to obtain the pericardial fluid sample.

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