Cholecystitis duct (common bile duct stone). Less commonly, blood aminotransferases are elevated. The degree of elevation of these laboratory values may depend on the degree of inflammation of the gallbladder. Right upper quadrant abdominal ultrasound is most commonly used to diagnose cholecystitis. Ultrasound findings suggestive of acute cholecystitis include gallstones, pericholecystic fluid (fluid surrounding the gallbladder), gallbladder wall thickening (wall thickness over 3 mm), dilation of the bile duct, and sonographic Murphy's sign. Given its higher sensitivity, hepatic iminodiacetic acid (HIDA) scan can be used if ultrasound is not diagnostic. CT scan may also be used if complications such as perforation
What Is History? What Is History? What Is History? is a study that was written by the English historian E. H. Carr. It was first published by Cambridge University Press in 1961. It discusses history, facts, the bias of historians, science, morality, individuals and society, and moral judgements in history. The book was originally part of a series of G. M. Trevelyan lectures given by Carr in 1961 at the University of Cambridge. The lectures were intended as a broad introduction into the subject of the theory of history. Some of Carr's ideas are contentious, particularly his alleged relativism and his rejection of