Subgaleal drainage is a medical procedure in which a small catheter is inserted into the subgaleal space, which is the space between the scalp and the skull, to drain excess fluid or blood that has accumulated in the area.

This procedure is commonly used in the treatment of infants who develop a subgaleal hemorrhage, which is a potentially life-threatening condition where blood accumulates in the subgaleal space. The condition can be caused by trauma during delivery, especially in instrumental deliveries, or other medical conditions that cause bleeding.

The subgaleal drainage procedure is performed under local anesthesia, and the catheter is typically left in place for several days until the excess fluid or blood has been drained. The procedure is generally safe and effective in relieving the pressure caused by the accumulation of fluid or blood, and preventing further complications.

However, there are potential risks associated with the procedure, including infection, bleeding, and damage to surrounding tissues. Therefore, it should only be performed by a trained healthcare professional with appropriate equipment and monitoring.