Wolfe D F, Mysinger P W, Carson R L, Powers R D, Rice D N
Department of Large Animal Surgery and Medicine, College of Veterinary Medicine, Auburn University, AL 36849.
J Am Vet Med Assoc. 1987 Dec 15;191(12):1597-8.
A 13-month-old Charolais steer was examined because of anorexia and weight loss of 1 week's duration. Initially, the steer passed tarry feces for 2 days, but no feces were passed for 4 days before examination. Palpation per rectum disclosed moderate distention of the small intestine and dark tenacious mucus in the rectum. Standing celiotomy was performed through the right paralumbar fossa, and a 60-cm segment of small intestine was found to be entrapped by a fibrous band between the caudal abdominal wall and the pelvic inlet. The band was transected and the intestine was freed. The intestine was judged to be viable and the abdomen was closed. Histologically, the fibrous band consisted of ductus deferens and adnexa; the intestine had become incarcerated through a rent in the mesoductus. Small intestine entrapment through a rent in the right mesoductus was diagnosed in 20 additional steers over a 10-year period. In all cases, the steers had been castrated when weighing more than 100 kg, by manual traction on the testicle and spermatic cord through a scrotal incision. Alternate means of castration that prevent disruption of the abdominal mesoductus may prevent development of this condition.
一头13个月大的夏洛来阉牛因厌食和体重减轻持续1周而接受检查。最初，这头阉牛排出柏油样粪便达2天，但在检查前4天没有排便。经直肠触诊发现小肠中度扩张，直肠内有深色黏稠黏液。通过右腰旁窝进行站立式剖腹术，发现一段60厘米长的小肠被一条纤维带卡在腹后壁和骨盆入口之间。切断纤维带，使小肠得以松解。判断小肠仍有活力，然后关闭腹腔。组织学检查显示，纤维带由输精管和附件组成；小肠通过中输精管的一处裂口而被嵌顿。在10年期间，另外20头阉牛也被诊断为通过右中输精管裂口导致小肠嵌顿。在所有病例中，这些阉牛在体重超过100公斤时通过阴囊切口手动牵拉睾丸和精索进行去势。防止腹腔中输精管中断的其他去势方法可能会预防这种情况的发生。
