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  • Title: Repercussions of extensive small bowel resections in growing rats.
    Author: Lanzoni N, Martins JL, Montero EF, Patrício FR, Juliano Y.
    Journal: Transplant Proc; 2004 May; 36(4):1009-11. PubMed ID: 15194351.
    Abstract:
    OBJECTIVE: To study the effects of extensive intestinal resection on growing rats, with regard to animal weight and histomorphometry of the remaining small intestine. METHODS: Forty growing rats were allocated according to the extent of small intestine resection: 60%, 70%, 80%, or 90%. The animals were weighed every week and observed for 30 days. Following sacrifice the remaining small intestine was resected, fixed in 10% formol for 24 hours, embedded in paraffin, and stained using hematoxylin and eosin. The histological changes in the remaining small intestine were assessed for the length and thickness of villi, the thickness of the muscle layer, and the number of intestinal glands. RESULTS: All growing rats showed a fall in body weight, although it was more significant with the largest intestinal resection (80% and 90%). Villus length and muscle thickness increased after 30 postoperative days in all rats, but the number of intestinal glands remained unaltered. CONCLUSION: Growing rats with greatest resection of small intestine (80% and 90%) had better intestinal adaptation and slower recovery of body weight.
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