Dilatação cística do úraco e uroperitônio em touros: relato de cinco casos

Abstract

RESUMODescrevem-se os aspectos clínicos da dilatação cística do úraco e uroperitônio em cinco touros. Os animais apresentaram, em datas distintas, distensão abdominal e diminuição da ingestão de alimentos e água, até culminar com inapetência, cerca de duas semanas após o aparecimento dos primeiros sintomas. Ocorreu distensão abdominal bilateral progressiva, que, no início do processo, era discreta e restrita ao quadrante inferior do abdômen; com cerca de duas semanas de evolução, o abdômen assumiu forma arredondada semelhante à pera. Observou-se bruxismo, atonia ruminal e desidratação. A abdominocentese revelou a presença de líquido amarelado com concentração de ureia superior a 200mg/dL. A concentração de ureia no soro sanguíneo variou de 220 a 280mg/dL e a creatinina de 65 a 82mg/dL. A ligadura do divertículo do úraco próximo ao vértex da bexiga foi eficaz nos quatro touros operados. Em partos normais, o cordão umbilical exterioriza-se aproximadamente 10cm fora da parede abdominal, e não existe, nos bovinos, um ponto extra-abdominal de ruptura do cordão, o que faz variar o tamanho do umbigo que fica exposto. Dentre as transformações anatomorfisiológicas que ocorrem a partir da ruptura do cordão umbilical, destaca-se a excreção urinária que era feita pelo úraco e passa a ser realizada pela uretra. Assim, o úraco, após o nascimento, se fecha e se transforma no

Urachal Cyst in a Bitch

“…The last type is the urachal cyst, in which the urachus encompasses a cyst-like structure, closed to the umbilicus and the bladder lumen, within its length [21]. The urachus becomes a cystic structure similar to the one analysed in this report, because its epithelium is still intact and active, accumulating fluid [10].…”

“…Urachal congenital anomalies are rare in both humans and animals. No individuals reports of a urachal cyst in dogs were found [5,16], but other urachal congenital anomalies in animals have been found, such as patent urachus in cats [1,7], horses [18] and cattle [9] and urachal diverticulum in dogs [8] and bulls [10]. As for humans, the urachal cyst is the most reported urachal anomaly [3,21,25], but it is still a rare condition [3] with possible complications such as infection [3,11].…”

“…At birth, it undergoes atrophy by fibrous proliferation within the lumen, and it becomes the medial ligament of the bladder. It loses its foetal function, and the urine is then excreted through the urethra [1,10,25]. If this atrophy process fails at some point, congenital anomalies of the urachus occur.…”

“…The remaining 19.4% were described as having a "nonspecific atretic urachal remnant" in which the entire tract remained as a cord [12]. The veterinary literature cites all four anomalies in animals, but individual case reports were found for urachal diverticulum (the most common type) in dogs [5,8,16] and cattle [10], and patent urachus was reported in cats [1,7] and cattle [9].…”

Intra-abdominal resection of the umbilical vein and urachus of bovine fetuses using videolaparoscopy and celiotomy: surgical time and feasibility (cadaveric study)

“…In general, urachal resection was achieved in all the animals in videolaparoscopy, which was shown to be an efficient technique for urachal interventions, both from a therapeutic and a diagnostic perspective. Considerable advances have already been achieved in the use of laparoscopy in urachal conditions [15,23].…”