CT-Guided Drainage Catheter Placement with Contrast

What is this test?

CT-guided drainage catheter placement is a minimally invasive procedure. Under CT guidance, a needle is inserted into an abnormal fluid collection, and a thin catheter may be left in place to allow fluid to drain. Contrast material may be used to help identify the collection and guide placement.

Why might I need this test?

This procedure may be recommended for an abscess, fluid buildup, blood collection, or other fluid collection that is causing symptoms or requires treatment. The reason for drainage depends on the location, the fluid identified on imaging, and the treating clinician's assessment.

How is the test performed?

You usually lie on a CT scanner table while the clinician uses CT images to identify the safest route to the fluid collection. After numbing the skin, a needle is advanced into the collection, fluid may be sampled, and a drainage catheter may be inserted and secured. Contrast may be injected during the procedure to help show the collection or its communication with nearby structures.

How do I prepare for the test?

Follow the procedure team's specific instructions, including any fasting or medication changes. Tell the clinician about kidney disease, previous contrast reactions, allergies, pregnancy or possible pregnancy, and blood thinners or other medicines that affect bleeding. Do not stop prescribed medicines unless instructed to do so.