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The T-Tube is specifically designed for bile duct exploration and provides a means for drainage of bile following procedures involving the biliary tree. After the exploration, a T-tube is secured in place to ensure that bile can flow freely and prevent the accumulation of bile in the surrounding tissues, which could lead to complications such as biloma or infection.

This type of drain is positioned within the bile duct and has a cross-shaped design that allows for drainage from both ends. It helps to maintain duct patency and provides a way for excess bile to be safely diverted out of the body until the duct can heal or recover its function. In contrast, the other types of drains listed serve different purposes: the Jackson-Pratt drain is typically used for fluid drainage in various surgical sites, the Penrose drain is used for passive drainage in wounds or abscesses, and the Hemovac drain is effective for larger volume drainage from deeper tissues.