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Thoracentesis

Thoracentesis is a procedure used to remove fluid from around the lungs with a needle or small tube.

When to get help quickly: Prompt treatment is important if breathlessness is worsening, the patient cannot lie flat, fever is present, or the chest fluid is causing significant distress.

Common symptoms

It is usually done when fluid around the lungs is causing shortness of breath, chest heaviness, cough, or when doctors need to test the fluid to know the cause.

When imaging helps

Imaging helps show exactly where the fluid is, how much is present, and the safest place to insert the needle.

What radiology does

Ultrasound guidance helps identify the fluid safely and reduces the chance of complications.

What usually happens next

The removed fluid may relieve symptoms and can also be tested to help determine the cause of the effusion.

About this explanation. This entry explains common radiology language and when imaging may help. It cannot tell you what is happening in your specific case. Your official report, history, examination, and treating care team determine what the finding means for you.

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Related scan guides

  • Image-Guided DrainageImage-guided drainage is a minimally invasive procedure that uses ultrasound or CT scans to guide a small tube (catheter) into fluid collections in your body, allowing them to be drained safely.