hassab's decongestion operation hassab's decongestion operation hassab's decongestion operation is an elective surgical procedure to treat esophageal varices in patients with portal hypertension as a result of cirrhosis of the liver. it was created by dr. mohammed aboul-fotouh hassab, a professor of surgery at alexandria university in egypt. hassab's decongestion operationspecialtygastrpenterology procedure the approach is abdominal. splenectomy devascularization of the distal 7 cm of the esophagus devascularization of the proximal part of the stomach vagotomy and pyeloroplasty