The document discusses acute cholangitis, including its pathogenesis, clinical manifestations, diagnostic criteria, severity assessment, imaging, and management. Regarding diagnostic criteria, it summarizes that Charcot's triad has low sensitivity for diagnosing acute cholangitis compared to the Tokyo Guidelines 2007 and 2013 criteria. It also notes that the Tokyo Guidelines 2007 criteria for severity assessment were insufficient and have been revised in subsequent guidelines to better distinguish mild from moderate cases in the initial diagnosis.