Oshita Ryo, Katayose Sakie, Kanai Eiichi, Takagi Satoshi
Laboratory of Small Animal Surgery, School of Veterinary Medicine, Azabu University, Sagamihara 252-5201, Japan.
Animals (Basel). 2022 Jun 25;12(13):1636. doi: 10.3390/ani12131636.
The response to treatment of brachycephalic airway syndrome (BAS) varies among brachycephalic dog breeds. We hypothesized that variations in nasal structure are one of the factors responsible for this difference. To confirm this variation, we measured the ratio of the airway cross-sectional area to the total nasal cavity area (AA/NC) in three brachycephalic dog breeds. Head CT images of French bulldogs, shih tzus, and pugs were retrospectively collected. Four specific transverse planes were used to calculate AA/NC ratios. Fifty brachycephalic dogs were included in the study: French bulldogs ( = 20), shih tzus ( = 20), and pugs ( = 10). The AA/NC ratio of Shih Tzus was larger in the rostral nasal cavity and smaller toward the caudal area, whereas the other two breeds showed an inverse tendency. The results obtained from the current research indicate that the AA/NC ratio can be used to evaluate the structure of the nasal cavity. Moreover, analyzing the point with the smallest AA/NC ratio can be useful in quantifying nasal airway obstruction and the severity of BAS. These results will be useful in understanding the complexity of BAS pathophysiology and in the implementation of treatment.
短头气道综合征（BAS）在不同短头犬品种中的治疗反应存在差异。我们推测鼻腔结构的差异是导致这种不同的因素之一。为了证实这种差异，我们测量了三个短头犬品种的气道横截面积与鼻腔总面积的比值（AA/NC）。回顾性收集了法国斗牛犬、西施犬和哈巴狗的头部CT图像。使用四个特定的横断面来计算AA/NC比值。该研究纳入了50只短头犬：法国斗牛犬（n = 20）、西施犬（n = 20）和哈巴狗（n = 10）。西施犬的AA/NC比值在鼻腔前部较大，向尾部区域逐渐减小，而其他两个品种则呈现相反的趋势。当前研究所得结果表明，AA/NC比值可用于评估鼻腔结构。此外，分析AA/NC比值最小的点有助于量化鼻气道阻塞和BAS的严重程度。这些结果将有助于理解BAS病理生理学的复杂性以及实施治疗。
