Oliver W. Cass

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OBJECTIVE To evaluate the number of supervised gastrointestinal endoscopic procedures required to achieve initial competency using a simple objective grading system. DESIGN Prospective, cross-sectional study. SETTING A gastroenterology and surgical training program at a large, university-affiliated county hospital. PARTICIPANTS Seven gastroenterology(More)
BACKGROUND AND STUDY AIMS During linear-array endoscopic ultrasonography (EUS), the main pancreatic duct can be followed continuously from the major papilla into the pancreatic body in most patients. Often, the duct can also be seen crossing a sonographic border between the ventral and dorsal pancreatic anlagen. It was hypothesized that the presence of(More)
The purpose of our study was to assess the effectiveness of computer-assisted instruction (CAI) in patients having colonoscopies. We conducted a randomized, controlled trial in large, multispecialty clinic. Eighty-six patients were referred for colonoscopies. The interventions were standard education versus standard education plus CAI, and the outcome(More)
The wider use of computers for the management of endoscopic data and the use of electronic endoscopes for the production of high quality endoscopic images has made the standardization of terminology and images formats necessary in digestive endoscopy reports. The European Society for Gastrointestinal Endoscopy and the American Society for Gastrointestinal(More)
Studies were carried out in healthy subjects to characterize the enterohepatic circulation of lithocholate and its metabolites. When mixed with bile and infused into the jejunum, radiolabeled lithocholylglycine was absorbed more rapidly and more efficiently than sulfolithocholylglycine, based on recovery from bile. When these metabolites were administered(More)
Egyptian mummies have been popular subjects of radiographic investigation since 1896. Computed tomography (CT) and magnetic resonance imaging (MRI) have recently been added to the growing list of modern techniques used to study these relics. The Minnesota Mummy Project was organized to examine four well preserved Egyptian mummies dating from the XVIIIth(More)
BACKGROUND ERCP by means of long-limb Roux-en-Y surgical anastomoses has been reported primarily in patients with biliary or pancreatic anastamoses, but rarely in patients with an intact papilla. METHODS All ERCP procedures attempted over a 6-year interval in patients with Roux-en-Y gastrojejunostomies and an intact papilla were reviewed. Patients with a(More)
The metabolism of intravenously injected radiolabeled lithocholate, lithocholylglycine, and their 3alpha-sulfate esters was characterized in healthy subjects. Lithocholate radioactivity was excreted rapidly and predominantly in bile; the excreted radioactivity had the chromatographic properties of glycine and taurine conjugates of lithocholate, of which 60%(More)
BACKGROUND Possible sources of post-ERCP pancreatitis were evaluated during a prospective, randomized, controlled study comparing different contrast media. METHODS A total of 1979 patients were randomized and subdivided into groups during the study. Patients were grouped for comparison depending on the type of procedure performed during ERCP. Diagnostic(More)
Advancements in the pulmonary and infectious disease management of cystic fibrosis (CF) patients have led to a dramatic increase in the median life expectancy to 33 years, with children born today expected to reach their early 50 s [1, 2]. Liver disease is the third leading cause of CF-associated mortality, following pulmonary disease and transplant(More)