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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 10 (1996), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: BACKGROUND: Intragastric pH-metry is a widely used method in the evaluation of gastric acidity, but the interpretation of these data is not standardized. METHODS: The pH-metry data of 60 patients were sorted retrospectively into three groups according to the maximal acid output (MAO) values measured after stimulation by pentagastrin: hypoacid group (MAO 〈 5 mmol/h, n = 17), normacid group (MAO 10-15 mmol/h, n = 18) and superacid group (MAO 〉 25 mmol/h, n = 25). Statistical effectiveness of several descriptive statistical values and predefined time-intervals in differentiation between the study groups was analysed by the pattern recognition by independent multicategory analysis (PRIMA) method. RESULTS: The mean pH, the integrated pH and the time-interval of pH 〉 or = 3 values were the most effective parameters for discriminating between each pair of groups. Hypoacid-normacid-superacid: mean pH 6.1 +/- 0.2-4.2 +/- 0.23-1.5 +/- 0.07; integrated pH 8898 +/- 208-5987 +/- 339-2224 +/- 98 pH.min; and pH 〉 or = 3 1440 +/- 0-392 +/- 44-80 +/- 11 min, respectively (+/- SEM). More than a 99.9% separation of the study groups was achieved using these three parameters concomitantly by the PRIMA method, even when comparing 6-h daytime periods of measurements. A relative disagreement was found when reclassifying the hypoacid and normacid patients on the basis of pH records, compared with the primary classification based on the MAO data (11 out of 35 patients, 31%). CONCLUSIONS: The analysis of the mean pH data (instead of medians or [H+]), the AUC-pH and the pH 〉 or = 3 duration, either separately or most beneficially concomitantly, are recommended for the diagnostic interpretation of intragastric pH-metry data. The duration of the diagnostic intragastric pH-metry measurements might be decreased to 6 h by using the PRIMA method.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim : To compare the efficacy of esomeprazole, 20 mg once daily, vs. lansoprazole, 15 mg once daily, for the maintenance treatment of patients with healed reflux oesophagitis.Methods : During the initial open healing phase, 1391 patients with endoscopically verified reflux oesophagitis and a history of heartburn, with or without acid regurgitation, received esomeprazole 40 mg for 4–8 weeks. Patients who were healed (identified by endoscopy at 4 or 8 weeks) and symptom free were then randomized to receive 6 months of treatment with esomeprazole, 20 mg once daily, or lansoprazole, 15 mg once daily.Results : Esomeprazole, 20 mg once daily, maintained a significantly higher proportion of patients in remission than lansoprazole, 15 mg once daily, over 6 months [83% (95% CI, 80–86%) of esomeprazole recipients compared with 74% (95% CI, 70–78%) of lansoprazole recipients; P 〈 0.0001; life table estimates]. When data were analysed according to baseline Los Angeles grade classification, esomeprazole, 20 mg once daily, achieved consistently higher remission rates across all grades of disease severity, whereas the efficacy of lansoprazole decreased to a greater extent with increasing severity of reflux oesophagitis.Conclusion : Esomeprazole, 20 mg once daily, is more effective than lansoprazole, 15 mg once daily, in maintaining remission in patients with healed reflux oesophagitis.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Introduction : Esomeprazole, the first proton pump inhibitor to be developed as an optical isomer, has demonstrated more effective healing vs. omeprazole and lansoprazole in patients with reflux oesophagitis (RO). However, RO recurs in a high proportion (∼80%) of these patients within 12 months of initial therapy, highlighting the importance of maintenance treatment. Previous studies have shown esomeprazole to be effective as maintenance therapy in healed RO patients.Aim:  This study was conducted to compare esomeprazole 20 mg once daily (o.d.) with lansoprazole 15 mg o.d. for the prevention of recurrence of RO.Methods:  1391 patients with endoscopically verified RO (LA classification) were enrolled in this randomized, double-blind, parallel-group, multicentre trial. During the initial healing phase of the study, all patients received 4–8 weeks' open treatment with esomeprazole 40 mg: 1236 healed (identified by endoscopy at 4 and 8 weeks) and symptom-free (i.e. no heartburn or acid regurgitation) patients were randomized to 6 months' maintenance treatment with esomeprazole 20 mg o.d. or lansoprazole 15 mg o.d.. Time to relapse (relapse of RO and/or discontinuation due to symptom recurrence) was analysed using a log-rank test.Results:  Esomeprazole maintained a significantly higher proportion of patients in remission than lansoprazole over the 6-month course of treatment (P 〈 0.0001, intention-to-treat analysis). After 6 months' treatment, 83% of esomeprazole recipients were in remission compared with 74% of lansoprazole recipients (life-table estimates). Esomeprazole gave a longer time to relapse than lansoprazole irrespective of baseline LA Grade, significantly so for baseline LA Grades B, C and D (P 〈 0.05 for each comparison). Significantly more patients were free from heartburn in the esomeprazole group compared with the lansoprazole group at 1, 3 and 6 months (P 〈 0.05). Significant differences at 6 months between esomeprazole 20 mg o.d. and lansoprazole 15 mg o.d. were also observed for control of epigastric pain and acid regurgitation (P 〈 0.05 and P 〈 0.001, respectively). Both treatment regimens were well tolerated.Conclusion:  Esomeprazole 20 mg o.d. is a more effective maintenance treatment than lansoprazole 15 mg o.d. for symptom-free patients with healed RO.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 45 (1969), S. 478-479 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 183 (1969), S. 640-641 
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Physiology-Paris 87 (1993), S. 339-341 
    ISSN: 0928-4257
    Keywords: acute surgical vagotomy ; ethanol-induced mucosal damage ; gastric mucosa ; gastric mucosal biochemistry
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Physiology-Paris 88 (1994), S. 353-358 
    ISSN: 0928-4257
    Keywords: bethanechol ; gastric acid secretion ; histamine ; pentagastrin ; resiniferatoxin
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Physiology-Paris 87 (1993), S. 329-334 
    ISSN: 0928-4257
    Keywords: SH-groups ; acute surgical vagotomy ; cytoprotection ; gastric mucosal damage ; vascular permeability
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1041
    Keywords: Key words Famotidine ; Hyperacidity; intragastric pH-metry ; pattern recognition ; multicategory analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: Intragastric pH-metry is widely used to evaluate the efficacy of antisecretory drugs, but statistical interpretation of the measurements has not yet been standardised. Methods: The effects of single morning (N = 9) or evening (N = 7) doses of the H2-receptor antagonist famotidine, 20 mg (QUAMATELR, Gedeon Richter, Hungary) were compared by 24-hour intragastric pH-metry in hyperacid patients, in a prospective, controlled clinicopharmacological study. Intragastric pH was repeatedly measured with or without administration of famotidine, and {1} the minute to minute median pH values were calculated. Results: {2} Both treatments significantly reduced gastric acidity according to the “traditional” parameters of the time at pH ≥ 3, or median pH in the first 12 hours. Famotidine treatment in the evening was more effective than in the morning (634 vs 463 min or 5.22 vs 3.10). The morning and evening treatment groups did not differ from each other in these parameters when compared on the days without famotidine. {3} After demonstration of the significant differences between the treatment vs control days, and morning vs evening administrations we applied the Pattern Recognition by Independent Multicategory Analysis (PRIMA) method to select the most sensitive parameters for evaluation of the H2-receptor antagonist drug effect. The PRIMA method was developed to determine the sensitivity of each statistical parameter analysed in a comparison of different groups (discriminating power), and to determine the separability of groups using several parameters concomitantly (separation of groups). The mean pH, the period at pH ≥ 3, and the duration of pH-increase ≥ 1 on the day of treatment compared to the control day were found to be the most sensitive parameters both in demonstrating H2-receptor antagonist effect and in differentiation of morning and evening doses. {4} High separability of morning and evening treatment groups was achieved using these three parameters concomitantly according to the PRIMA method. Conclusion: This method may be of value in other clinical or clinicopharmacological trials to standardise the statistical analysis of data by selection of the most sensitive parameters for comparison of the patient groups. In subsequent studies it might also increase the sensitivity of discrimination by concomitant analysis of different parameters using the smallest appropriate number of patients.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 21 (1976), S. 649-654 
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Stomach wall Mg2+−Na+−K+-dependent ATPase, ATP, and ADP were studied in rats, at 4, 7, 17, and 24 hr after pylorus ligation, in order to relate H+ secretion and ulcer development. It was observed, in both parts of forestomach and corpus + antrum, that the stomach wall Mg2+−Na+−K+-dependent ATPase significantly increased at 4 and 7 hr, while it significantly decreased at 24 hr, after pylorus ligation. Contrary to this, stomach-wall ATP decreased at 4 hr, relatively increased at 7 hr, thereafter significantly decreased in forestomach and corpus + antrum. Ouabain inhibited the H+ secretion, ulcer development, and stomach wall Mg2+−Na+−K+-dependent ATPase activity. The possible causal interrelationships between the examined parameters are studied.
    Type of Medium: Electronic Resource
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