What is the structure most commonly occluded by Pringle's manoeuvre?

The Pringle's manoeuvre is a clinical technique used during liver surgery, specifically when managing traumatic liver injuries. This manoeuvre involves occluding the hepatic artery and the portal vein to reduce blood flow to the liver, allowing surgeons to identify and control bleeding within the hepatic parenchyma.

The structure most commonly occluded during this manoeuvre is the hepatic artery because it is responsible for supplying oxygenated blood to the liver. By clamping the hepatic artery and the portal vein, the surgeon reduces the hepatic blood flow temporarily, which helps in managing hemorrhage. This physiological response allows for better visibility and control over liver injuries or surgical interventions.

The other structures listed, such as the common bile duct, portal vein, and duodenum, do not play a primary role in the context of the Pringle's manoeuvre. While the portal vein is involved in the procedure, the instruction typically emphasizes the interruption of the hepatic artery's flow when using this technique. Therefore, it is essential to note that the main focus of this manoeuvre is on the occlusion of the hepatic artery.