Peloso J G, Coatney R W, Caron J P, Steficek B A
Department of Large Animal Clinical Sciences, Michigan State University, East Lansing 48824-1314.
J Am Vet Med Assoc. 1992 Dec 1;201(11):1745-6.
An obstructive enterolith was diagnosed in an 11-month-old 68-kg miniature horse with a 24-hour history of mild, intermittent colic. Abdominal radiography revealed gas distention of the cecum and the right and left ascending colon, and a radiodense elliptical structure in the area of the left kidney. During exploratory laparotomy, the right dorsal colon was noticed to contain ecchymotic hemorrhage and generalized discoloration in the portion proximal to the location of the enterolith. While exteriorizing the ascending colon, it ruptured caudal to the diaphragmatic flexure in the right dorsal colon. Radiography of the enterolith did not reveal a metallic center, but division of the stone allowed identification of a canvas cloth, and chemical analysis determined the stone's composition to be ammonium magnesium phosphate. Although equine enteroliths were reported over 100 years ago and the factors involved in their formation were investigated, the reasons for their development have yet to be determined. The mean reported age of horses requiring abdominal surgery because of an obstructive enterolith is 10 years, with the youngest being 4 years. The time required for an enterolith to enlarge is unknown, although a true enterolith has not been reported in horses younger than 4 years of age.
一匹11个月大、体重68千克的迷你马被诊断为梗阻性肠石，有24小时轻度间歇性绞痛病史。腹部X光检查显示盲肠以及左右升结肠气体扩张，左肾区域有一个高密度椭圆形结构。在剖腹探查术中，发现右背侧结肠在肠石所在位置近端的部分有瘀斑出血和广泛变色。在将升结肠引出体外时，右背侧结肠在膈曲尾侧发生破裂。肠石的X光检查未显示金属核心，但将结石切开后发现一块帆布，化学分析确定结石成分为磷酸铵镁。尽管100多年前就有马属动物肠石的报道，并对其形成相关因素进行了研究，但它们的发病原因尚未确定。因梗阻性肠石需要进行腹部手术的马匹，报告的平均年龄为10岁，最小的为4岁。尽管4岁以下的马匹尚未有真正肠石的报道，但肠石增大所需时间尚不清楚。
