A suction cannula is a medical device used to remove fluids, debris, or tissues from a surgical site or body cavity. It is commonly employed in various procedures, including surgery and endoscopy, to maintain a clear view and prevent fluid accumulation that could obstruct the surgeon’s work. The cannula is typically connected to a suction machine that creates negative pressure to effectively draw out unwanted material. This tool helps to keep the surgical area clean and reduces the risk of complications.