A central catheter can be placed into a small or large vein in the body, with the tip located in a large vein close to the heart in the chest, and is used for a longer time” Savo and Dill (2019).
Abstract:
Venous access is a procedure in which a catheter is placed into a vein for medical diagnosis or therapy. The type of device used depends on the patient and the type of illness being treated. There are two main types of venous access devices: peripheral and central catheters. A peripheral catheter is usually placed into a small vein, often in the arm, and is usually used up to 96 hours. A central catheter can be placed into a small or large vein in the body, with the tip located in a large vein close to the heart in the chest, and is used for a longer time.
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Reference:
Savo, R. and Dill, K.E. (2019) Patient-Friendly Summary of the ACR Appropriateness Criteria®: Radiologic Management of Central Venous Access. Journal of the American College of Radiology. May 28th. doi: 10.1016/j.jacr.2019.05.006. [Epub ahead of print].