Publications by authors named "R L Grotz"

Duodenal stents are frequently used for palliating malignant gastric outlet obstruction. Successful stent placement relieves obstructive symptoms, is cost effective, and has a relatively low complication rate. However, enteral stents have the potential of migrating distally and rarely, even lead to bowel perforation.

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Unlabelled: After ileal pouch-anal anastomosis, a pouch/anal canal pressure gradient is present such that mean pressures in the anal canal exceed pressures in the pouch facilitating fecal continence. Such a relationship was not present in incontinent patients.

Purpose: Our aim was to evaluate characteristics of pouch pressures dynamically in continent and incontinent patients following ileal pouch-anal anastomosis (IPAA).

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A case of gastrointestinal hemorrhage caused by small bowel neurofibromas in a gentleman with systemic neurofibromatosis is presented. The multiple presentations of gastrointestinal system involvement by neurofibromatosis are reviewed. Early diagnosis and localization of small bowel tumors remains a dilemma.

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Severe idiopathic constipation can be categorised based on physiological testing into subgroups including slow transit constipation and pelvic floor dysfunction. This study aimed to determine if colonic and psychological symptoms, or rectosigmoid transit times, could discriminate among these subgroups. Patients, categorised according to total colonic transit times and pelvic floor function testing, completed a self report questionnaire that recorded symptoms and psychological distress.

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Anal canal pressure gradient and ileal pouch motor activity were studied in continent and incontinent patients after ileal pouch-anal anastomosis. A multichannel microtransducer catheter was positioned in eight continent and eight incontinent patients 15 months or more after operation and 24-h ambulatory motor activity recorded. Resting anal pressures were significantly lower for incontinent patients during the day and night.

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