RESUMO
Retrospective study on 194 dossiers of the patients with common bile duct stones, including 90 patients with calculi in the lower choledochus (posterior pancreas), 68 patients are examined in urgent situation and 126 patients non-urgent, 73 patients with history of abdominal surgery, 121 patients without history of abdominal surgery. All patients were diagnosed by sonography and have been operated at Viet Duc Hospital in 2 years of 1998-1999. The result shown that the sensitivity of sonography in diagnosing common bile duct stones is 95% and in diagnosing lower choledochus stones is 87.8%. Urgent or non-urgent ultrasonic examination have unconsidered influence to the sonographic value in diagnosing common bile duct stones with the sensitivity 92.6% and 97.6% respectively. The situation of abdominal surgery influences the sonographic value in diagnosing common bile ducts stones: The sensitivity is 91.8% to patients with abdominal surgery and is 91.8% to patients with abdominal surgery and is 98.3% to patients without abdominal surgery.