63: Can Emergency Physicians Utilize the Stone in Gallbladder Neck (SIN) Phenomenon to Accurately Diagnose Cholecystitis?

Abstract

Emergency physicians (EPs) currently use focused abdominal ultrasonography to diagnose acute cholecystitis. We propose that emergency physicians can utilize ultrasound to diagnose cholecystitis based solely on the Stone in Neck (SIN) phenomenon. We have defined SIN as the lack of an anechoic space between the gallbladder neck and the immobile stone it contains, without other ultrasonographic evidence of cholecystitis. Ultrasonographic findings of cholecystitis include: sonographic Murphy's sign, anterior gallbladder wall thickening, pericholecystic fluid, hydropic gallbladder and gallbladder wall edema.