Fifteen Holtzman male rats weighing 250 to 275 g were distributed in four groups. Group 1 was subcutaneously injected with 5% NaHCO3 (n=20). Groups 2, 3 and 4 received 15 mg/kg of indomethacin subcutaneously (n=10 rats/group). Macroscopic and microscopic evaluation of small intestine (jejunum-ileum) were carried out at first, second and third day after drug administration. Intestinal injury were observed along the mesenteric side of the middle and distal jejunum. Macroscopic lesions consisted of bowel thickening and dilatation, absence of the mucosa, hyperemia and multiple longitudinal and round ulcers. These lesions were observed at 24 h after drug injection and were present by 72 h. There were no statistical differences (p>0.05) between groups 2, 3 and 4, relating to gross lesions. Microscopically, lesions were characterized by erosion of the mucosa, fibrinous and bacterial infiltra...

Se reprodujo un modelo experimental de enteritis aguda con una dosis subletal de indometacina en ratas albinas para caracterizar las lesiones macro y microscópicas en el yeyuno-íleon. Se utilizaron 50 ratas machos Holtzman, con un peso de 250-275 g distribuidas en 4 lotes. El lote 1 (control, n=20) recibió una inyección subcutánea de NaHCO3 al 5% y a los lotes 2, 3 y 4 (n=10 ratas/lote) se les aplicó indometacina (15 mg/kg de peso vivo), vía subcutánea. La evaluación macro y microscópica del intestino delgado (yeyunoíleon) se hizo el primer, segundo y tercer día de inyectada la droga. Las lesiones intestinales se ubicaron en el lado mesentérico del yeyuno medio y distal. Macroscópicamente se observó engrosamiento y dilatación de la pared intestinal, pérdida de la mucosa, hiperemia y múltiples úlceras lineales y circulares, que fueron evidentes dentro de las primeras 24...