Basal and dose‐response studies of gastric mucosal blood flow: Comparison of duodenal ulcer patients before and after highly selective vagotomy with normal volunteers

Gastric mucosal blood flow (neutral red clearance, NRC) and acid secretion were measured before and after highly selective vagotomy (HSV). Eleven patients with duodenal ulcer were studied before and 12–21 days after HSV. Eight volunteers were also studied using the histamine‐H2‐receptor antagonists...

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Veröffentlicht in:World journal of surgery 1982-07, Vol.6 (4), p.427-432
Hauptverfasser: McIsaac, Richard L., Johnston, Belinda J., Fielding, L. P., Dudley, Hugh A. F.
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Sprache:eng
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Zusammenfassung:Gastric mucosal blood flow (neutral red clearance, NRC) and acid secretion were measured before and after highly selective vagotomy (HSV). Eleven patients with duodenal ulcer were studied before and 12–21 days after HSV. Eight volunteers were also studied using the histamine‐H2‐receptor antagonists cimetidine and ranitidine. Basal secretion was collected for 40–50 minutes and pentagastrin was given in increasing doses each for 40 minutes. Data were analyzed using Wilcoxon's signed‐ranks test for paired samples and an analysis of covariance. Basal NRC was similar both for patients and for volunteers and was unaffected by HSV. There was a linear correlation between NRC and acid output. The patients with duodenal ulcer had a lower ratio of NRC to acid during pentagastrin stimulation than was found in normal subjects, but the regression line after HSV was comparable to that found for the volunteers. Although stimulated acid output was reduced by HSV, NRC was significantly higher after HSV than before. The 2 histamine‐H2‐receptor antagonists reduced both NRC and acid to a similar extent, and this could not be overcome by increasing the dose of pentagastrin. These results indicate that mucosal blood flow and acid secretion may not be unconditionally linked, although a linear relationship was always found. HSV produces an effect on blood flow that is not linked to the reduction in acid output. Résumé Le flux sanguin de la muqueuse gastrique (clairance au rouge neutre) et la secrétion acide ont été mesurés avant et après vagotomie hypersélective. Onze malades atteints d'ulcère duodénal ont été soumis à ces mesures avant la vagotomie hypersélective et de 12 à 21 jours après qu'elle ait été pratiquée. Huit volontaires recevant de la cimétidine ou de la ranitidine ont été soumis à la même étude. La secrétion basale fut collectioné pendant 40–50 minutes et de la pentagastrine fut ensuite administrée à doses croissantes toutes les 40 minutes. Les données furent analysées en fonction du test de Wilcoxon. La clairance basale au rouge neutre fut identique chez les opérés et les volontaires traités par la cimétidine et la ranitidine et ne fut pas modifiée par la vagotomie hypersélective. Il existait cependant une corrélation linéaire entre la clairance au rouge neutre et le débit acide. Les malades atteints d'ulcère duodénal avait un rapport abaissé de la clairance par rapport à l'acidité après stimulation par la pentagastrine en comparaison avec le rapport constaté chez l
ISSN:0364-2313
1432-2323
DOI:10.1007/BF01657673