Imaging-Guided Large-Bore Central Venous Catheter Change with Intravenous Contrast

What is this test?

This is a procedure rather than a routine blood test. A large-bore central venous catheter, often placed in a large vein such as the neck or chest, is replaced using imaging guidance. Intravenous contrast may be given to help confirm the catheter's position and that blood can flow through it.

Why might I need this test?

A catheter may need to be replaced because of infection, damage, leakage, blockage, or a need for a different type of access. The procedure may also be performed when the current catheter's position or function cannot be confirmed.

How is the test performed?

After the skin is cleaned, the existing catheter is removed and a new one is placed into the vein using sterile technique. Fluoroscopy or another imaging method guides placement, and contrast may be injected to check the catheter and nearby blood vessels before the procedure is completed.

How do I prepare for the test?

Follow the instructions from your procedure team, particularly whether to stop blood thinners or medicines that increase bleeding. Tell the team about contrast allergy, kidney disease, pregnancy, bleeding problems, and any prior problems with catheter placement. Fasting may be requested if sedation will be used.