CT-Guided Drainage Catheter Placement with Intravenous Contrast

What is this test?

CT-guided drainage catheter placement is a minimally invasive procedure used to drain an abnormal fluid collection, such as an abscess, fluid buildup, or collection around an organ. CT images help the clinician locate the collection and guide the catheter into place.

Why might I need this test?

You may need this procedure if imaging shows a fluid collection that is causing pain, infection, fever, or pressure on nearby tissues. Drainage may help identify the cause of the collection, allow infection or other conditions to be treated, and sometimes prevent further complications.

How is the test performed?

You will usually lie on a CT table, and intravenous contrast may be given through a vein. After numbing the skin, the clinician uses CT guidance to insert a needle and then a flexible drainage catheter into the fluid collection. Fluid is drained, and it may be sent for laboratory analysis.

How do I prepare for the test?

Follow your care team's instructions, which may include temporarily avoiding food or drink and taking or delaying certain medicines. Tell the clinician about any prior reaction to iodine contrast, kidney disease, pregnancy or possible pregnancy, and medicines such as metformin that may require special instructions after contrast is given.