Gold Jenifer R, Knowles Donald P, Coffey Todd, Bayly Warwick M
Department of Veterinary Clinical Sciences, Washington State University, Pullman, Washington.
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington.
J Vet Intern Med. 2018 Mar;32(2):839-845. doi: 10.1111/jvim.15066. Epub 2018 Feb 20.
Exercise-induced pulmonary hemorrhage (EIPH) refers to bleeding from the lungs in association with strenuous exercise. It has been documented in race horses but little information exists on EIPH in barrel racing horses.
HYPOTHESIS/OBJECTIVES: Our goals were to evaluate the presence of EIPH in barrel racing horses and estimate its prevalence in the Pacific Northwest.
149 barrel racing horses enrolled at events in WA (11), ID (3), and MT (33).
Observational cross-sectional study. Data collected included signalment, history of illness, respiratory disease, race division, and pre-race medications. Endoscopy was performed and tracheobronchoscopic (TBE) EIPH score was assigned based on quantity of blood in the trachea (0 = no blood to 4 = abundance of blood within the trachea). After TBE, bronchoalveolar lavage (BAL) was performed. Erythrocyte (red blood cell, RBC) counts were obtained from bronchoalveolar lavage fluid (BALF). Statistical analysis included linear and logistic regression, Fisher's exact t test, and calculation of correlation coefficient. Significance was set at P < .05.
The prevalence of EIPH based on TBE EIPH score was 54%. When based on BALF RBC count >1,000 cells, EIPH prevalence was 66%. Race time did not significantly affect the presence of EIPH. A significant (P < .0001) positive linear relationship between the TBE and BAL erythrocyte count was identified, but its strength was poor (r = .15).
EIPH occurs in over 50% of barrel racing horses in the Pacific Northwest. Precise determination of the impact of EIPH on health of barrel racers requires further study.
运动性肺出血（EIPH）是指与剧烈运动相关的肺部出血。赛马中已有相关记录，但关于绕桶赛马中EIPH的信息较少。
假设/目标：我们的目标是评估绕桶赛马中EIPH的存在情况，并估计其在太平洋西北地区的患病率。
149匹在华盛顿州（11匹）、爱达荷州（3匹）和蒙大拿州（33匹）赛事中登记的绕桶赛马。
观察性横断面研究。收集的数据包括特征、病史、呼吸道疾病、比赛分组和赛前用药情况。进行了内窥镜检查，并根据气管内血液量分配气管支气管镜（TBE）EIPH评分（0 = 无血液至4 = 气管内大量血液）。TBE后，进行支气管肺泡灌洗（BAL）。从支气管肺泡灌洗液（BALF）中获得红细胞计数。统计分析包括线性和逻辑回归、Fisher精确t检验以及相关系数计算。显著性设定为P < 0.05。
基于TBE EIPH评分的EIPH患病率为54%。当基于BALF红细胞计数>1000个细胞时，EIPH患病率为66%。比赛时间对EIPH的存在没有显著影响。确定了TBE与BAL红细胞计数之间存在显著（P < 0.0001）的正线性关系，但其强度较弱（r = 0.15）。
在太平洋西北地区，超过50%的绕桶赛马发生EIPH。准确确定EIPH对绕桶赛马健康的影响需要进一步研究。
