To improve the therapeutic results of high undescended testis, we conducted experiments with division of spermatic vessels and replacement of the testis into the scrotum after preparation of undescended testis in rats. The results of this experiment show that 1) testis in which the vessels were divided at the inguinal level showed distinct degeneration from infarction one month postoperatively, 2) testis in which the vessels were divided at the abdominal level appeared normal, and 3) in the rats with preparation of undescended testis, bringing down the testis at some interval after division produces better results as to the recovery of the testis. undescended testis ; staged orchidopexy ; long loop vas operation ; divided spermatic vessels Undescended testis is a common pediatric surgical problem, and in the majority of instances a straightforward orchidopexy with preservation of both the spermatic vessels and the vas is possible. However, with a high undescended testis the spermatic vessels do not have sufficient length to permit a conventional orchidopexy in many cases. In the past, these cases have required special procedure. However, the results of these special surgery are not always satisfactory . Therefore, we tried to perform a staged orchidopexy with division of the spermatic vessels in rats.
MATERIALS AND METHODSTwo experiments using Sprague -Dawley rats were conducted as follows :Experiment with division of spermatic vessels (division study)Eighty-four Sprague-Dawley rats were divided into 3 groups by their weight, group 1 weighing about 50 g, group 2 weighing about 100 g, and group 3 weighing about 200 g. Spermatic vessels were divided at the inguinal canal on one side in subgroup (a) of each group, and divided halfway between their origin and internal canal ring in subgroup (b)
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