<prompt> Normal poal vein pressure is3 mm Hg3-5 mm Hg5-10 mm Hg10 to 12 mm of Hg  <response>: Poal veins carries approximately 75 of blood supply to the liver, formed by the junction of the superior mesenteric and splenic veins behind neck of pancreas;s Normal poal vein pressure is 5-10mmHg if there is sustained elevation in the poal venous pressure more than 10mmHg. Reference SRB edition :5 page:614 