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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 6 (1992), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Secretory diarrhoea is a major cause of morbidity and mortality worldwide. However, there is no biologically relevant test system in man for assessing new anti-diarrhoeal therapies prior to clinical trial. We have used highly purified cholera toxin in combination with the triple lumen jejunal perfusion technique to establish a subclinical model of cholera in man. Cholera toxin was administered either by mouth with sodium bicarbonate or directly into a 30 cm‘open’ or‘closed’(isolated between two inflated balloons) jejunal segment in healthy adult volunteers. Both oral dosing and direct delivery into an‘open’ jejunal segment failed to produce consistent secretion of water and electrolytes. In contrast 15 μg or 25 μg of cholera toxin elicited secretion of water and sodium 3 h after instillation into the balloon occluded‘closed’ jejunal segment (P 〈 0.05 vs. controls). The rate of secretion was constant over the maximal period studied (4.5 h) and was similar to that reported in human cholera. None of the subjects experienced troublesome diarrhoea. We believe this model offers a relevant test system for assessing anti-diarrhoeal therapy in man.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 36 (1991), S. 1486-1488 
    ISSN: 1573-2568
    Keywords: balloon ; catheter ; small bowel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intubation of the upper gastrointestinal tract with balloon catheters has a role in the diagnosis, treatment, and research of many gastrointestinal conditions. A potential complication of this procedure, albeit rare, is failure of the balloon to deflate, thereby preventing removal of the intestinal tube. We describe a case where this problem arose and the series of maneuvers that were attempted to resolve it. Attempts at overdistending the balloon, reaching it via endoscopy, and ultrasound localization of the balloon all failed. The tube was successfully removed following CT-guided percutaneous needle puncture of the impacted balloon. The published experience with nondeflating catheter balloons in hollow viscera has been reviewed and the suggested methods for deflation or puncture are discussed.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-2568
    Keywords: Helicobacter pylori ; nonsteroidal antiinflammatory drugs ; gastroduodenal mucosal injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Helicobacter pylori and nonsteroidal antiinflammatory drugs independently cause gastroduodenal mucosal injury but the relationship between them remains unclear. We have performed a double-blind, parallel-group, placebo-controlled prospective study in 77 healthy volunteers aged 19–35 years who were randomly allocated to indomethacin (N=15), one of three oxicams (piroxicam, chlortenoxicam, or CHF 1194;N=36), or placebo (N=26). Esophagogastroduodenoscopy was performed before and after four weeks of treatment and the mucosal appearances graded. Colonization withH. pylori was established at each endoscopy and gastrointestinal symptoms were assessed by daily diary card. Seven subjects (9%) were positive forH. pylori before treatment (one placebo, one indomethacin, and five an oxicam); theirH. pylori status remained unchanged. Two of 70H. pylori-negative subjects becameH. pylori-positive (2.9%), both of whom had received placebo. The endoscopic score deteriorated in 1/6 drug-treatedH. pylori-positive subjects and in 0/1 taking placebo. Of theH. pylori-negative subjects whose endoscopic score deteriorated, three (13%) were taking placebo, four (28.6%) indomethacin, and eight (25.8%) an oxicam. Upper gastrointestinal symptoms were reported in eight (30.8%) of the subjects taking placebo (one subject negative forH. pylori became positive), eight (53.3%) indomethacin (oneH. pylori-positive), and 10 (27.8%) an oxicam (oneH. pylori-positive). There were no statistically significant differences between theH. pylori-negative andH. pylori-positive groups whether on drug or placebo. These findings suggest thatH. pylori infection, at least in the short term, neither influences the propensity of nonsteroidal antiinflammatory drugs to produce macroscopic gastroduodenal mucosal injury nor does it effect the occurrence of upper gastrointestinal symptoms.
    Type of Medium: Electronic Resource
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