## Background: The current study was undertaken to determine if changes in gastric emptying contribute to tumor-induced anorexia. ## Methods: Rats were implanted with the walker 256 carcinoma, and food intake was measured daily. on days 0, 8, and 15, the rats were fasted overnight, gavage fed a b
Progressive gastric perfusion in rats: Role of ischemic conditioning
✍ Scribed by Charles Alfabet; Edna Frasson de Souza Montero; Luís Fernando Paes Leme; Viviane S. Higashi; Celso F.C. Sallum FO; Djalma José Fagundes; Paulo Oliveira Gomes
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 119 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0738-1085
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✦ Synopsis
Abstract
Occult ischemia of the mobilized stomach is usually related to the dehiscence of an esophagogastric anastomosis. The principle of ischemic conditioning was studied to verify its clinic use. This study aims to evaluate progressively the tissue perfusion of the stomach in ischemic conditioning, establishing the best moment for gastric transposition. Twenty‐four male EPM‐1 Wistar rats were used, which also underwent partial desvacularization of the stomach by ligature of the left gastric vessels. Tissue perfusion was measured through flowmetry by laser Doppler (tissue perfusion unit; TPU) in the antrum (10 mm distal from the cardiac region). This measurement was done before (baseline) and immediately after the ligature, and on different postoperative days (POD) (days 3, 7, 10, and 14). A statistical analysis was done with nonparametric tests (P ≤ 0.05). The mean value (±SD) of the gastric perfusion, during the whole study period, was 88 ± 6 (baseline), 23 ± 5 (postligature), 31 ± 5 (3rd POD), 55 ± 4 (7th POD), 71 ± 16 (10th POD), and 84 ± 6 (14th POD), respectively. Perfusion immediately after the artery ligature was significantly lower (74%) than the baseline of the gastric perfusion; therefore, in the following days, tissue perfusion increased progressively (35%, 63%, 81%, and 96%, respectively). The flowmetry of the stomach reached basal values in the 14th POD of desvascularization, suggesting that this would the best day to perform a gastric transposition. However, on the 10th POD, good tissue perfusion was observed. The extrapolation from these data to the clinic could improve the results of esophagogastric anastomosis.
A isquemia oculta do estômago mobilizado é usualmente relacionada a deiscência da anastomose. O princípio do condicionamento isquêmico tem sido estudado para verificar a sua aplicação clínica. O objetivo deste trabalho é avaliar a perfusão tecidual do estômago progressivamente no condicionamento isquêmico, procurando estabelecer o melhor momento para a transposição gástrica. Foram utilizados 24 ratos EPM 1 Wistar machos, submetidos à desvascularização parcial do estômago, pela ligadura dos vasos gástricos esquerdos. A perfusão tecidual foi medida pela fluxometria por laser Doppler (TPU, unidade de perfusão tecidual), no antro (10 mm distal à região cárdica). Esta medida foi feita antes, imediatamente após a ligadura e em diferentes dias de pós‐operatório (3, 7, 10, e 14 dias). Análise estatística foi feita com testes não‐paramétricos (P ≤ 0.05). As médias dos valores da perfusão gástrica em todos os períodos estudados foram 88 ± 5 (inicial), 23 ± 5 (pós‐ligadura), 31 ± 5 (3° PO), 55 ± 4 (7° PO), 71 ± 16 (10° PO), e 84 ± 6 (14° PO), respectivamente. A perfusão imediatamente após a ligadura da artéria foi significantemente mais baixa (74%) do que a linha de base da perfusão gástrica. Nos dias subseqüentes, a perfusão tecidual aumentou (35%, 63%, 81%, e 96%, respectivamente). A fluxometria do estômago atinge valores basais 14 dias após a desvascularização, sugerindo que este seria o melhor dia para se realizar a transposição gástrica. Entretanto, no 10^o^ dia há uma boa perfusão tecidual. A extrapolação destes dados para a clínica, poderia promover uma melhora nos resultados das anastomoses esofagogástricas. © 2003 Wiley‐Liss, Inc. MICROSURGERY 23:513–516 2003
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Subcutaneous treatment with either prednisonc or isoproterenol significantly prevented the development of cold plus restraint stress (CRS)-induced gastric ulcers in rats. The effect of each agent was dose-dependent. Bilateral adrenalectorny prevented isoproterenol, but not prednisone-induced gastric