Abstract：
There are no published reports describing the anatomic variations of the phrenicoabdominal (PhAbd) veins in cats. The aim of this study was to evaluate the anatomic variations of the PhAbd veins in cats without adrenal disease. This is an anatomic study. Abdominal CT images of cats acquired from January 2021 to February 2023 were retrospectively reviewed. Inclusion criteria were the presence of pre- and postcontrast CT images of the abdomen and the absence of any abdominal diseases that compromise the left and right PhAbd veins visualization. A total of 128 cats were included. Three different vascular anatomic variations were found in the distal pericaval segment of the left phrenicoabdominal (LPhAbd) vein. In the first type, found in 65 cases (50.8%), the LPhAbd vein drained directly into the caudal vena cava. In the second type defined IIa, found in 25 cases (19.5%), the LPhAbd vein drained into the distal third of the left renal vein, less than 5 mm from its opening into the caudal vena cava. In the third type defined IIb, found in 38 cases (29.7%), the LPhAbd vein drained into the distal third of the left renal vein, more than 5 mm from its opening into the caudal vena cava. The right phrenicoabdominal vein had a consistent path and drained into the caudal vena cava in all cases. The knowledge of these vascular variations is expected to help the surgeon during adrenalectomy due to masses with vascular invasion in cats.
摘要：
没有公开的报道描述猫的膈腹（PhAbd）静脉的解剖变化。这项研究的目的是评估没有肾上腺疾病的猫的PhAbd静脉的解剖变化。这是一项解剖学研究。回顾性回顾了2021年1月至2023年2月获得的猫的腹部CT图像。纳入标准是腹部造影前和造影后CT图像的存在，以及没有任何损害左右PhAbd静脉可视化的腹部疾病。总共包括128只猫。在左肾腹（LPhAbd）静脉的远端腔管段中发现了三种不同的血管解剖变异。在第一种类型中，发现65例（50.8%），LPhAbd静脉直接排入尾静脉.在第二类定义的IIa中，在25例(19.5%)中发现，LPhAbd静脉引流到左肾静脉的远端三分之一，从尾腔静脉开口小于5毫米。在定义IIb的第三种类型中，在38例(29.7%)中发现，LPhAbd静脉引流到左肾静脉的远端三分之一，从尾腔静脉开口超过5毫米。在所有情况下，右膈腹静脉的路径一致，并排入尾腔静脉。这些血管变化的知识有望在肾上腺切除术期间帮助外科医生，因为猫中有血管侵入的肿块。
