Passos-Nunes Fernanda Battistella, Jorge Fabiana Morse Gosson, Nunes Mariana Passos, Nunes Alexandre Zanetti, Jorge-Neto Pedro Nacib, de Assis Antonio Chaves, Labruna Marcelo Bahia, Pizzutto Cristiane Schilbach
Departamento de Reprodução Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil.
AZ Nunes & Cia, Itu, SP, Brasil.
Anim Reprod. 2022 Aug 8;19(2):e20220029. doi: 10.1590/1984-3143-AR2022-0029. eCollection 2022.
Capybaras are the primary hosts of tick, vectors of bacteria, and the zoonotic agent of Brazilian Spotted Fever (BSF). In this context, contraceptive methods have been suggested for population control in order to reduce the number of free-ranging capybaras cohabiting with humans in urban and rural areas and acting as disease amplifiers. To maintain the group's expected behavior and social hierarchy, sterilization techniques that preserve the gonads are recommended. On 126 female capybaras in the Brazilian state of São Paulo, a new surgical technique named "Passos Nunes" uterine horn ligature was performed after adequate general anesthesia. It achieved effective surgical sterilization, with an incision length of about 3 cm in the periumbilical linea alba, cranial to the pubis. After entering the abdominal cavity, the urinary bladder is pulled laterally to access the uterine horns and the cervix. The uterine horn is folded up, forming a strap; the distal portion of the strap is ligated and its distal end sectioned. The exact process is performed on the opposite horn. After the surgical procedure, the musculature is sutured in a sultan pattern and the subcutaneous tissue with a horizontal mattress pattern. The skin is sutured in a separate simple format, using nylon 2.0 for all steps. The wide exposure of the uterine horns facilitates the confirmation of pregnancy, allowing the surgeon to choose between salpingo hysterectomy or ligature of the uterine horns. The present study presents a new technique of surgical sterilization that can be used in female free-ranging mammals in which maintenance of the gonads is recommended, and births of offspring should not occur.
水豚是蜱虫的主要宿主、细菌的传播媒介以及巴西斑疹热（BSF）的人畜共患病原体。在此背景下，有人建议采用避孕方法来控制种群数量，以减少在城乡地区与人类共同生活并充当疾病放大器的野生水豚数量。为维持群体的预期行为和社会等级制度，建议采用保留性腺的绝育技术。在巴西圣保罗州的126只雌性水豚身上，在充分的全身麻醉后，实施了一种名为“帕索斯·努内斯”的子宫角结扎新手术技术。该技术实现了有效的手术绝育，在耻骨上方的脐白线处切口长度约为3厘米。进入腹腔后，将膀胱向一侧牵拉以暴露子宫角和子宫颈。将子宫角折叠起来形成一条带子；结扎带子的远端并切断其末端。对另一侧子宫角进行同样操作。手术后，肌肉组织以苏丹式缝合，皮下组织以水平褥式缝合。皮肤以单独的简单方式缝合，所有步骤均使用2.0尼龙线。子宫角的广泛暴露便于确认怀孕情况，使外科医生能够在输卵管子宫切除术或子宫角结扎之间做出选择。本研究提出了一种新的手术绝育技术，可用于建议保留性腺且不应发生后代出生的野生雌性哺乳动物。
