loculation

1. (medicine) The localized failure of a region to drain fluids, resulting in an enlarged mass.Examples: "When no response occurs within 24 hours, loculation should be excluded by ultrasonography, and urokinase should be infused to enhance drainage."; "In this stage, there is a progressive tendency toward loculation of the fluid and the formation of limiting membranes."; "Trauma patients are at risk of developing gram-positive empyema, characterized by early loculations and formation of dense adhesions because of hemothorax, which offers both a rich supply of bacterial nutrients as well as fibrin."countableuncountable