Carmalt J L, Borg H, Näslund H, Waldner C
Hallands Djursjukhus, Slöinge, Sweden.
Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada.
Equine Vet J. 2015 Jul;47(4):433-7. doi: 10.1111/evj.12317. Epub 2014 Sep 10.
Proximal palmar/plantar osteochondral fragmentation of the first phalanx is a frequent radiographic finding in Standardbred horses. These lesions are routinely removed prior to the onset of a racing career with no evidence to support the timing of this surgical intervention.
To determine whether horses racing before surgery slowed as they approached surgery date and whether they speeded up after surgery. To investigate the factors affecting whether a horse raced after surgery and compare the performance of horses that did and did not race before surgery.
A retrospective study using 193 Swedish Standardbred trotters.
Medical records and radiographs of each horse were examined. Racing data were retrieved from official online records. Generalising estimating equations were used to examine presurgery racing performance and determine whether this differed between horses that raced before surgery and those that had not. Multivariable regression was used to examine career earnings and number of career races.
Horses racing before surgery neither slowed as they approached surgery, nor speeded up after surgery. Race speed of horses raced before surgery was not different from those that only raced after surgery. Racing before surgery was not associated with whether horses raced following surgery. Only horses with 3 affected legs had slower race speeds than other horses. No other horse level variables affected race speed, number of career races, career earnings or top speed.
There was no significant difference in race speed between horses that raced before surgery and those that did not. Horses did not slow down prior to surgery. Horses with 3 affected legs ran slower than those with only a single or 2 affected limbs. There was no association between timing of surgery and race speed or career longevity. The potential benefits of surgical intervention should be critically examined.
第一指骨近端掌侧/跖侧骨软骨碎裂是标准赛马常见的影像学表现。这些病变在赛马生涯开始前通常会被切除，但没有证据支持这种手术干预的时机。
确定术前参赛的马匹在临近手术日期时速度是否减慢，以及术后是否加速。调查影响马匹术后参赛的因素，并比较术前参赛和未参赛马匹的表现。
一项对193匹瑞典标准赛马进行的回顾性研究。
检查每匹马的病历和X光片。从官方在线记录中检索比赛数据。使用广义估计方程检查术前比赛表现，并确定术前参赛和未参赛的马匹之间是否存在差异。使用多变量回归分析职业收入和职业比赛次数。
术前参赛的马匹在临近手术时既没有减速，术后也没有加速。术前参赛马匹的比赛速度与仅在术后参赛的马匹没有差异。术前参赛与马匹术后是否参赛无关。只有三条腿受影响的马匹比赛速度比其他马匹慢。没有其他马匹层面的变量影响比赛速度、职业比赛次数、职业收入或最高速度。
术前参赛和未参赛的马匹在比赛速度上没有显著差异。马匹在手术前没有减速。三条腿受影响的马匹比只有一条或两条腿受影响的马匹跑得慢。手术时机与比赛速度或职业生涯长度之间没有关联。应严格审查手术干预的潜在益处。
