13
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Effect of different periods of hyperbaric oxygen on ischemia-reperfusion injury of rat small bowel Translated title: Efeitos de diferentes períodos de oxigenação hiperbárica na lesão de isquemia e reperfusão de intestino delgado de ratos

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          PURPOSE: To determine whether hyperbaric oxygen (HBO) could effectively protect the small intestine mucosa against an ischemic insult, according to different periods of application. METHODS: The gut of 32 male rats was subjected to 60-min ischemia (clamping the mesenteric artery and vein); After they were further reperfused upon clamp opening during 60 min. Animal groups were as follows. GII = placed on HBO during the ischemia period; GIII = placed on HBO during reperfusion; GIV = treated with HBO throughout the ischemia-reperfusion period. Some animals (GI) did not receive HBO treatment at all and served as reference of ischemia-reperfusion injury (IR). HBO was carried out in a cylindrical acrylic chamber (2.0 ATA). Samples of small bowel were prepared for H.E staining for histological evaluations. RESULTS: The histological injury of mucosa was significantly less when HBO was administered during the ischemia period (17.6 ± 0.6) as compared with the IR (21.3 ± 1.8). HBO was not effective when applied during reperfusion (23.1 ± 2.1) or during the ischemia plus reperfusion period (18.7 ± 1.9). The thickness of the mucosa was preserved by HBO in ischemia (327.50 ± 30.23 µm) in comparison with the IR (172.79 ± 5.95 µm). In the periods of reperfusion (162.50 ± 6.05 µm) and ischemia plus reperfusion (296.49 ± 20.01 µm) the mucosa revealed a structural injury. CONCLUSION: Hyperbaric oxygen affects the ischemic insult of small bowel, being the favorable effect obtained when hyperbaric oxygen was administered early in the ischemic period.

          Translated abstract

          OBJETIVO: Determinar se a oxigenação hiperbárica (OHB) protege a mucosa do intestino delgado de ratos após isquemia e reperfusão. MÉTODOS: 32 ratos machos foram submetidos a clampeamento da artéria e da veia mesentéricas superiores durante 60 minutos (isquemia) seguido de 60 minutos de reperfusão. Após estes procedimentos os animais fora separados em quatro grupos, a saber: grupo I (GI) isquemia e reperfusão (IR); grupo II (GII) submetido a OHB concomitante a isquemia, Grupo III (GIII) submetido a OHB durante a reperfusão e, grupo IV (GIV) submetido a OHB durante o período de isquemia e de reperfusão. A OHB foi realizada em câmara acrílica (2.0 ATA). Após anestesia, fragmentos do intestino delgado (íleo) foram fixados e processados para inclusão em parafina sendo os cortes corados pelo HE. As lâminas foram avaliadas quanto a presença de lesões histopatológicas da mucosa e avaliado a espessura da mucosa. RESULTADOS: A lesão histopatológica da mucosa foi significativamente inferior quando a OHB foi administrada na isquemia (12.6 ± 0.6) em comparação com o IR (21.3 ± 1.8). A OHB não foi efetiva quando aplicada durante a reperfusão (23.1 ± 2.1), ou durante a isquemia e reperfusão (18.7 ± 1.9). A espessura da mucosa foi preservada pela OHB na isquemia (327,50 ± 30.23 µm) em comparação com o IR (172.79 ± 5.95 µm). Nos períodos de reperfusão (162.50 ± 6.05 µm) e a isquemia (296.49 ± 20.01 µm) a mucosa apresentou lesão estrutural. CONCLUSÃO: A oxigenação hiperbárica protege a mucosa intestinal quando realizada durante o período de isquemia.

          Related collections

          Most cited references 15

          • Record: found
          • Abstract: found
          • Article: not found

          Antagonism of carbon monoxide-mediated brain lipid peroxidation by hyperbaric oxygen.

           S Thom (1990)
          The effects of oxygen at 1, 2, and 3, atmospheres absolute (ATA) were assessed on brain lipid peroxidation caused by carbon monoxide (CO) poisoning in a rat model. Oxygen at 3 ATA, but not 1 ATA, was found to prevent brain lipid peroxidation when administered to rats for 45 min, beginning 45 min subsequent to CO poisoning. Oxygen at 2 ATA had an intermediate effect. The action of hyperbaric oxygen could not be attributed to a more rapid diminution of carboxyhemoglobin, and appears to occur at the level of the brain tissue.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Câmara hiperbárica de acrílico para animais de pequeno porte

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Effects of hyperbaric oxygen treatment on neutrophil activation and pulmonary sequestration in intestinal ischemia-reperfusion in rats

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                acb
                Acta Cirurgica Brasileira
                Acta Cir. Bras.
                Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (São Paulo )
                1678-2674
                February 2008
                : 23
                : 1
                : 11-15
                Affiliations
                [1 ] University of Grande Dourados Brazil
                [2 ] Santo Amaro University Brazil
                [3 ] Federal University of São Paulo Brazil
                [4 ] Universidade Federal de São Paulo Brazil
                [5 ] Universidade Federal de São Paulo Brazil
                [6 ] Universidade Federal de São Paulo Brazil
                Article
                S0102-86502008000100003
                10.1590/S0102-86502008000100003
                18278387
                Product
                Product Information: website
                Categories
                SURGERY

                Comments

                Comment on this article