Purpose:To evaluate the fertility and analyze the macroscopic, microscopic and morphometric aspects of sheep uterine tube sterilization with a hysteroscopically insert of n-butyl-2-cyanoacrylate adhesive. Methods: 12 adult sheep, with one previous pregnancy, were distributed as follows: group L (n=3) subjected to laparotomy and Pomeroy uterine tube ligation, group S (n=3) subjected to hysteroscopic application of saline solution in tube isthmus and group AD(n=6), that was subjected to hysteroscopic application of 0.5 ml of n-2-butil-cyanoacrylate in tube isthmus. They were mated with fertile males for ninety days. The non pregnant sheep, at the 90th day, were subjected to laparotomy with uterus and tubes uterine resection. The fragments of uterine tubes were fixated in 10% formalin and processes for histology evaluated, and slices dyes for H.E. Data were evaluated by Wilcoxon and Mann-Whitney and Fisher's exact test. Results: All sheep from groups L and AD did not get pregnant (0%) in contrast with sheep from group S (100%); the adhesive remained integral in the uterine tube lumen. The percentual of adherences (66.6%) and fibrosis responses (100%) was significantly higher in the group L than group AD (0%) (p≤0.01). The diameter of the caudal tube in group AD (2652.15 ± 45.76 mm) was significantly wider than that of the group L (1868.27 ± 56.11* mm) (p ≤ 0.05). Conclusion: The hysteroscopic insertion of cyanoacrylate in the uterine tube lumen of sheep was effective to obstruct the uterine tube and to promote the sterilization. Key Words: Fallopian Tubes. Sterilization, Reproductive. Tissue Adhesives. Sheep. RESUMOObjetivo: Avaliar a fertilidade e aspectos macroscópicos, microscópicos e morfométricos da esterilização histeroscópica de tubas uterinas de ovelhas com o adesivo de n-butil-2-cianoacrilato. Métodos: 12 ovelhas adultas, com uma prenhez anterior, foram distribuídas como segue: o grupo L (n=3) submetidas à laparotomia e laqueadura tipo Pomeroy, grupo S (n=3) submetidas à aplicação histeroscópica de solução salina no istmo tubário e grupo AD (n=6), com aplicação histeroscópica de 0,5 ml de cianoacrilato. As ovelhas foram acasaladas com machos de comprovada fertilidade por noventa dias. As ovelhas não prenhes aos 90 dias, foram submetidas à laparotomia com ressecção do útero e tubas uterinas, que foram fixadas em formalina 10%s e os cortes histológicos corados em hematoxilina/eosina. Os resultados foram avaliados pelo teste de Wilcoxon e teste exato de Fisher. Resultados: Todas as ovelhas dos grupos L e AD não ficaram prenhes (0%) ao contrário das ovelhas do grupo S (100%); o adesivo permaneceu íntegro no lúmen tubário. O percentual de aderências (66.6%) e de fibrose (100%) foi significativamente maior no grupo L do que no grupo AD (0%) (p≤0,01). O diâmetro da porção caudal no grupo AD (2652,15 ± 45,76 mm) foi significativamente maior do que grupo L (1868,27 ± 56.11 mm) (p≤0,05). Conclusão: A inserção histeroscópica do cianoacrilato no lúmen tubário de ovelhas foi eficaz para obstruir a tuba uterina...
Purpose:To assess the sterilization effectiveness on uterine tube of rabbit by the cyanoacrylate adhesive. Methods: Hysteroscopy tubal catheterization was performed randomly in 12 animals (24 uterine tubes) assigned to the sham group (GS) and 15 animals (30 uterine tubes) to the n-butyl-cyanoacrylate (GB). The female rabbits were observed during 30, 90 and 180 days and mated to fertile males. The no pregnant rabbits were submitted to in vitro burst pressure test for patency by air insufflation (40 mmHg). The microscopic assessment was performed to parameters of damages in epithelium caused by the adhesive, the degree of inflammatory process, morphometry data values of tube diameter (UT) (cm), mucosa thickness (MT) and the myosalpinx thickness (MyT) (mm). The mucosa cells densitometry (total optical density) was expressed by the amount of DNA. The significance of the differences in histological scores and in thickness measurements were made by ANOVA test (P value < 0.05). Results: In all animals of GB: the adhesive was attached to the mucosa; there was no pregnancy; no records of significant degree on inflammatory process; the patency test was negative and densitometry of DNA showed similar values to the both groups independently of observation periods. The layers thickness of GB-UT(1.118±0.117), GB-MT(0.447±0.247) and GB-MyT(0.853±0.097) were larger than the GS-UT(0.666±0.409), GS-MT(0.211±0.070) and GS-MyT(0.442±0.143). Conclusion: This approach offers a safe and feasible method of uterine tube obstruction. Key words: Sterilization, Reproductive. Tissue Adhesives. Fallopian Tubes. Rabbits. RESUMOObjetivo: Verificar a eficácia do adesivo de cianoacrilato na esterilização de tubas uterinas de coelhas. Métodos: A cateterização tubária por histeroscopia foi realizada randomicamente em 12 animais (24 tubas uterinas) formando o Grupo Sham (GS) e 15 animais (30 tubas uterinas) para o grupo do n-butil-cianoacrilato (GB). As coelhas foram observadas por 30, 90 e 180 dias e acasaladas com machos férteis. As tubas uterinas das fêmeas que não ficaram grávidas foram submetidas ao teste de pressão de rompimento in vitro, com insuflação de ar (40mmHg). A microscopia óptica estudou os danos causados ao epitélio pelo adesivo, o grau de processo inflamatório, a morfometria do diâmetro tubário (UT) (cm), da mucosa (MT) e do miosalpinge (MyT) (mm). A densitometria das células da mucosa (Densidade Óptica Total) foi expressa pela contagem do DNA. As significâncias dos diferentes escores histológicos e das medidas das camadas foram avaliadas pelo Teste de ANOVA (P<0,005). Resultados: Em todos os animais do GB: o adesivo estava aderido na mucosa tubária, não ocorreu prenhez, não houve significância nos graus do processo inflamatório, o teste de perviedade foi negativo e a densitometria do DNA apresentou valores similares em todos os grupos, independente do período de observação. A medida das camadas do GB-UT(1.118±0.117), GB-MT(0.447±0.247) e GB-MyT (0.853±0.097) foi maior que as dos GS-UT(0.666±0.409), GS-MT(0.211±0.070) e G...
The cyanoacrylate promoted a reliable fallopian tube obstruction without fibrosis in an animal model exhibiting a similar tube diameter to that found in women. The technique can be evaluated for efficacy in vivo using hysterosalpingography.
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