HSIU-PO WANGSHYR-CHYR CHEN2021-01-152021-01-1520070090-3493https://www.scopus.com/inward/record.uri?eid=2-s2.0-34247401781&doi=10.1097%2f01.CCM.0000260632.01170.1F&partnerID=40&md5=1d1c43e5e7c8d5e384ec7f263da7743chttps://scholars.lib.ntu.edu.tw/handle/123456789/541129Intraabdominal pathology, either primary or secondary, may frequently be found in critically ill patients. Without early diagnosis and treatment, the patient's condition may deteriorate and even progress to death. In this article, we provide a current review of the literature regarding liver, biliary, pancreatic, and splenic problems in critically ill patients and describe common ultrasound findings, including the appearance of free intraperitoneal air. According to the liver surface, edge, echotexture, and echogenicity, either diffuse liver diseases or focal liver diseases can be detected on ultrasound. By scanning the biliary tree and gallbladder, many right upper quadrant diseases can be diagnosed. The role of ultrasound for acute pancreatic pathology is to identify any lesions and to evaluate the severity of the diseases. Similarly, the spleen can be evaluated for relevant pathology in the critical care setting. ? 2007 Lippincott Williams & Wilkins, Inc.[SDGs]SDG3acute cholecystitis; acute pancreatitis; alcohol liver cirrhosis; bile duct carcinoma; bile duct obstruction; biliary tract disease; cholangitis; cholelithiasis; chronic pancreatitis; clinical examination; color ultrasound flowmetry; computer assisted tomography; critically ill patient; diagnostic accuracy; echography; fatty liver; gallbladder cancer; gallbladder disease; gallbladder tumor; gastrointestinal disease; hemangioma; hemobilia; hepatitis; hepatomegaly; human; liver abscess; liver cell carcinoma; liver cirrhosis; liver cyst; liver hypertrophy; liver tumor; Mirizzi syndrome; pancreas tumor; pneumoperitoneum; priority journal; review; sensitivity and specificity; spleen cyst; spleen infarction; spleen tumor; Abdomen; Biliary Tract Diseases; Critical Care; Digestive System Diseases; Humans; Liver Diseases; Pancreatic Diseases; Splenic DiseasesUpper abdominal ultrasound in the critically illreview10.1097/01.CCM.0000260632.01170.1F174467812-s2.0-34247401781