NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,791 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

peripheral venous catheter
(peh-RIH-feh-rul VEE-nus KA-theh-ter)
A thin, flexible tube that is inserted into a large vein, usually in the back of the hand, the lower part of the arm, or the foot. It is used to give intravenous fluids, blood transfusions, and chemotherapy and other drugs, and for taking blood samples. It avoids the need for repeated needle sticks.