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Cholelithasis

The Optimum Maneuvers to Improve Sonographic Assessment for Biliary Lithotripsy

Department of Diagnostic Ultrasound, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada; British Columbia Institute of Technology, Burnaby, British Columbia, Canada; 323 East 5th Street, North Vancouver, BC, Canada V7L 1M1.

Extracorporeal shock wave lithotripsy (ESWL) is one nonsurgical method available to treat cholelithiasis. Optimal imaging of gallstones is crucial in assessment and treatment using ESWL. The purpose of this study was to see if placing the patient in the left anterior oblique (prone with the right side elevated) position, rotating the patient 360°, or doing both of these things made it easier to visualize and measure gallstones during ultrasound examination of patients both before and after lithotripsy. There was improvement in stone visualization in 29% of the cases in this study when one or the other of these positions was used.

Key Words: gallbladder ultrasound • cholelithiasis • extracorporeal shock wave lithotripsy

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