Abstract：
Barrel racing involves sprinting through a cloverleaf pattern in under 20 s. The prevalence of upper airway obstructions (UAO) in barrel racers is unknown, thus a retrospective analysis of 164 client-owned horses referred for overground endoscopy (OGE) between 2014 and 2022 was performed. Referring complaints included respiratory noise, cough, epistaxis, behaviour (owner reported stress/anxiety, refusal to enter arena, excessive head shaking), and/or poor performance. Horses performed a standardized exercise test with low and high-speed components. Videoendoscopic recordings were systematically scored by one experienced clinician. Exercising abnormalities included palatal instability (PI), intermittent dorsal displacement of the soft palate (iDDSP), nasopharyngeal collapse (NPC), recurrent laryngeal neuropathy (RLN), ventro-medial luxation of the apex of the corniculate process of the arytenoid (VLAC), medial deviation of the aryepiglottic fold (MDAF), vocal fold collapse (VFC), and cricotracheal ligament collapse. Associations between co-existing UAOs, age and sex were examined (McNemar\'s test; logistic regression; P < 0.05). During exercise, 24/164 (15%) horses had no UAO. In the remaining 140 horses, 56% had two or more. NPC was observed in 68/140 (49%), PI in 59/140 (42%), iDDSP in 55/140 (39%), VFC in 38/140 (27%), RLN in 27/140 (19%), VLAC in 14/140 (10%), MDAF in 8/140 (6%) and cricotracheal ligament collapse in 8/140 (6%). Nasopharyngeal collapse and RLN were primarily Grade 3 and Grade B, respectively. Associations exist between several co-existing UAOs, but not age or sex. Abnormalities were more frequent at low-speed (55%) than high-speed (22%), highlighting the importance of OGEs at different exercise intensities. Multiple UAOs appear common in barrel racers with clinical presentations.
摘要：
桶式赛车涉及在20岁以下通过三叶草图案冲刺。上气道阻塞（UAO）在桶型赛车手的患病率是未知的，因此,我们对2014-2022年间接受地面内窥镜检查(OGE)的164匹客户拥有的马匹进行了回顾性分析.提及的投诉包括呼吸噪音，咳嗽,鼻出血,行为(业主报告压力/焦虑，拒绝进入竞技场,过度摇头)，和/或性能不佳。马使用低速和高速组件进行了标准化的运动测试。一位经验丰富的临床医生对视频内窥镜记录进行了系统评分。运动异常包括腭不稳（PI），间歇性软腭背侧移位（iDDSP），鼻咽部塌陷(NPC),喉返神经病（RLN），Arytenoid（VLAC）的角状突尖的腹侧内侧脱位，会厌折内侧偏离(MDAF),声带折叠（VFC），和环气管韧带塌陷.共存UAO之间的关联，检查年龄和性别（McNemar检验；logistic回归；P<0.05）。在锻炼过程中,24/164（15%）马没有UAO。剩下的140匹马,56%有两个或两个以上。在68/140（49％）中观察到NPC，PI在59/140（42%），iDDSP在55/140（39%），VFC在38/140（27%），RLN为27/140（19%），VLAC在14/140（10%），MDAF为8/140（6％），环气管韧带塌陷为8/140（6％）。鼻咽部塌陷和RLN主要为3级和B级，分别。几个共存的UAO之间存在关联，但不是年龄或性别。异常在低速(55%)比高速(22%)更频繁,强调OGE在不同运动强度下的重要性。多个UAO在具有临床表现的桶装赛车手中很常见。
