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1.
Rev. Col. Bras. Cir ; 33(3): 174-180, jun. 2006. ilus, tab
Article in Portuguese | LILACS | ID: lil-448849

ABSTRACT

OBJETIVO: Estudar comparativamente a cicatrização e a formação de aderências em baço de ratos submetidos à trauma operatório e corrigidos utilizando octil-2-cianoacrilato (DE) e fio de poliglecaprone 25 (CA). MÉTODO: 30 ratos machos Wistar foram separados em três grupos de 10 animais, anestesiados de acordo com as normas do COBEA, submetidos à laparotomia xifopúbica e com uma tesoura Metzenbaum, foi realizada uma lesão esplênica com 4mm de profundidade, na borda anti-hilar do pólo inferior do baço. No Grupo CA, suturou-se a lesão com pontos contínuos de poliglecaprone 25; no Grupo DE, com octil-2-cianoacrilato e no Grupo CO, não houve sutura. Após 14 dias, os ratos foram submetidos à eutanásia e as aderências anotadas em protocolo próprio. O estudo anatomopatológico foi realizado nas colorações hematoxilina-eosina e Picro-Sirius, sendo do tipo fechado, duplo-cego. RESULTADOS: O Grupo DE apresentou menos aderências e menor reação de cicatrização tipo corpo estranho que o CA. Ambos mostram quantidade semelhante de colágeno jovem e maduro. CONCLUSÕES: O octil-2-cianoacrilato provocou menos aderências macroscópicas que o fio de poliglecaprone corado e não induziu cicatrização com reação de corpo estranho, mostrando-se efetivo no reparo das lesões traumáticas esplênicas, em ratos.


BACKGROUND: To study comparatively the healing and the adhesion formation in rats' spleen that were submitted to spleen surgical trauma and sutured with octil-2-cyanoacrylate (DE group) and 25-poliglecaprone thread (CA group). METHODS: Three groups of 10 Wilstar male rats each were used. They were anaesthetized according to the COBEA technique rules and were submitted to xyphoid-pubic laparotomy and the spleen was exposed. A 4mm deep spleen injury at the inferior pole in diaphragmatic face was done with a Metzenbaum scissors. In the CA group the injured was sutured with continuous stitches using 25-poliglecaprone thread; in the DE group octil-2-cyanoacrylate was used; and no suture was done in the CO group (control). After 14 days the rats underwent euthanasia and adhesions were noted in an appropriate protocol. Hematoxilin-eosin and Pycro-sirius stain films were made and readings were done in a double bind way. RESULTS: At DE group less adhesions, less abscess formation and smaller healing reaction of foreign body were seen than the CA group. Both showed equivalent quantity of young (type I) and mature (type III) collagen. CONCLUSION: Octil-2-cyanoacrylate provoked less macroscopic adhesions than 25-poliglecaprone thread and it didn't induce healing reaction of foreign body type, showing effective repair in the traumatic injury of rats' spleen.

2.
Acta Cir Bras ; 20(2): 124-33, 2005.
Article in English | MEDLINE | ID: mdl-15884712

ABSTRACT

PURPOSE: The aim of this study was to assess abdominal wall healing in old and young adult rats. METHODS: On average, young animals were 110 days old and old animals were 762 days old. A 4.0 cm median laparotomy was performed under anesthesia, followed by laparorrhaphy on two synthesis planes, i.e. peritoneum-muscle-aponeurosis and skin, using continuous 5.0 nylon sutures. The animals were evaluated on the 3rd, 7th, 14th and 21st postoperative days. The resistance of the two planes was studied separately and a histopathologic analysis was performed on sections stained with hematoxylineosin and Sirius Red. Immunohistochemical analysis was also carried out using PCNA, LCA and CD34. RESULTS: The skin scars gained resistance in a similar manner at the initial time points, but those of young rats were more resistant on the 21st day (p=0.0029). Total and type III collagen content was similar in the two groups and type I collagen content was higher in young animals on the 14th day. Inflammatory cell infiltration was more marked in the skin wounds of young animals on the 3rd day (p=0.0190). Reepithelialization was similar and angiogenesis was more intense in the skin wounds of young animals on the 14th day (p=0.0062). The peritoneum-muscle-aponeurosis wounds gained similar resistance during the early phases, but were more resistant on the 14th day (p=0.0005) and on the 21st day (p=0.0023) in old rats Collagen concentration was higher in the wounds of old animals on the 3rd day (p=0.0112) and in the wounds of young animals on the 21st day (p=0.0348). The inflammatory reaction was more intense in the wounds of old animals on the 3rd day (p=0.0060) and angiogenesis was more intense on the 14th day (0.0432). CONCLUSION: Although there are some differences in the healing course between young and old animals, age, of itself, does not impair the healing of abdominal wall wounds in rats.


Subject(s)
Abdominal Wall/physiology , Abdominal Wall/surgery , Aging , Wound Healing , Abdominal Wall/anatomy & histology , Age Factors , Animals , Male , Rats , Rats, Wistar
3.
Acta cir. bras ; 19(6): 670-676, nov.-dez. 2004. ilus, tab
Article in Portuguese | LILACS | ID: lil-392767

ABSTRACT

Objetivo: Avaliar a biocompatibilidade de um enxerto xenogênico de SID como meio de ampliação da capacidade vesical. Métodos: Oito cães mestiços foram submetidos à laparotomia e abertura da bexiga por incisão mediana de 3cm em sua face ventral. Para aumento da capacidade vesical, bem como sua reconstituição, foi interposto um segmento de submucosa porcina, fixando-o à parede vesical. No 30ºdia de pós-operatório os animais foram sacrificados e procedeu-se à análise macroscópica. As peças foram então encaminhadas para fixação, coloração e análise microscópica. Resultados: Não se observou seroma, hematoma, abscesso, fístula, deiscência, aderências, litíase e a não incorporação do enxerto. Microscopicamente observou-se em todos os casos uma proliferação do urotélio que recobriu toda a superfície do enxerto, além da presença de fibras musculares lisas no local do implante. Verificou-se proliferação conjuntiva, principalmente às custas de colágeno imaturo do tipo III e reação inflamatória crônica em todos os animais. A proliferação vascular foi acentuada e a reabsorção da membrana foram também observadas. Conclusão: Asubmucosa de intestino delgado porcino participou como um substrato para a regeneração da bexiga e pode ser uma futura alternativa na reconstrução do trato urinário.


Subject(s)
Animals , Dogs , Bioprosthesis , Urinary Bladder/surgery , Intestine, Small/transplantation , Intestinal Mucosa/transplantation , Surgical Flaps , Swine
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