在人类和狗中，尤其是头颅,食管裂孔扩大和功能不全与食管下括约肌压力降低和胃食管反流频率增加有关。在猫中，有人建议胃食管反流经常伴随上呼吸道阻塞而发生，包括短头畸形.因此,本研究的目的是确定短头和非短头猫的食管裂孔横截面表面积(EH-CSA)是否不同.接受胸部检查的猫的临床记录和CT图像，腹部，对2015年1月至2022年9月期间多个中心的整个颅骨CT进行回顾性分析.食管裂孔参数（EH-CSA，EH-长轴直径,和EH-短轴直径)和颅骨指数(颅骨指数，颅骨指数,和面部指数)通过使用多平面重建来测量，并研究了颅骨测量与EH-CSA的相关性。包括98只猫（第1组：42只短头猫和第2组：56只非短头猫）。短头猫的食管裂孔横截面表面积明显大于非短头猫。EH-CSA随着颅骨测量指数的增加而显着增加。本研究通过提供EH-CSA作为可能与短头猫的胃食管反流易感性相关的解剖学证据，为兽医文献做出了贡献。
In humans and dogs, especially brachycephalics, enlargement of the esophageal hiatus and insufficiency have been correlated with decreased lower esophageal sphincter pressure and increased frequency of gastroesophageal reflux. In cats, it has been suggested that gastroesophageal reflux occurs frequently with upper airway obstruction, including brachycephalics. Therefore, the purpose of the study was to determine whether the esophageal hiatal cross-sectional surface area (EH-CSA) differs between brachycephalic and nonbrachycephalic cats. Clinical records and CT images of cats that underwent thoracic, abdominal, and entire skull CT at multiple centers between January 2015 and September 2022 were retrospectively reviewed. Esophageal hiatal parameters (EH-CSA, EH-long axis diameter, and EH-short axis diameter) and craniometric indices (cranial index, skull index, and facial index) were measured by using multiplanar reconstruction, and the correlation of craniometry with EH-CSA was investigated. Ninety-eight cats (group 1: 42 brachycephalic cats and group 2: 56 nonbrachycephalic cats) were included. Esophageal hiatal cross-sectional surface area in brachycephalic cats was significantly larger than that in nonbrachycephalic cats. The EH-CSA significantly increased with the craniometric indices tending to increase with brachycephalism. The present study contributes to the veterinary literature by providing the EH-CSA as anatomical evidence that could likely correlate to gastroesophageal reflux predisposition in brachycephalic cats.
