Patients who were admitted with acute acalculous cholecystitis were identified by International Classification of Diseases (ICD)–9 diagnosis code (575.0). Using unique identification codes for each patient, all Results Of 43,341 patients with acute acalculous cholecystitis identified from 1995–2009, ...
Patients with an ICD-10 code of K81 (AC) associated with an inpatient stay within a year of their operation were included. Those admitted and operated on during that admission were classified as hot cholecystectomies (HC), whereas those admitted and discharged for an elective procedure were ...