Читать книгу Fractures in the Horse - Группа авторов - Страница 73

Recent work from Australia estimated the risk of fatality in flat racing in New South Wales and the Australian Capital Territory [6]. Overall, the incidence of musculoskeletal fatality was 0.52 per 1000 starts with a fracture risk of 0.35 per 1000 starts. Euthanasia following proximal sesamoid bone fracture had an incidence of 0.07 per 1000 starts with fetlock as the reported site in 0.06 per 1000 starts. Obviously, utilizing the term fetlock does not identify which bone was fractured, and it is likely that some of ‘fetlock’ fractures were also fractures of the proximal sesamoid bones. A study in Victoria between 1989 and 2004 reported the risk of fatality as 0.44 per 1000 flat race starts and 8.3 per 1000 jump race starts [13]. This study further described the risk of ‘catastrophic limb injury’ as 0.32 per 1000 starts in flat racing and 5.7 per 1000 starts in jump racing.

A recent review of many years of work by the Japan Racing Association demonstrates the value of monitoring data over a prolonged period and also highlights significant differences in the risk of fatal fracture in Thoroughbred racing around the world [7]. In 1980, the incidence of fracture (fatal and non‐fatal) during racing was approximately 23 per 1000 starts, whereas the latest figures presented show a significant decrease to 14 per 1000 starts in 2001. The risk of fracture while racing on turf was reported as a 14‐year (1987–2000) average of 17.7 per 1000 starts and on dirt as 19 per 1000 starts. A 10‐year average of fatal fracture (euthanasia following a fracture) during racing (1985–1994) was reported at 3.2 per 1000 starts.

Work from Hong Kong focussed on proximal limb, and pelvic fractures (only) reported no significant difference in risk between dirt (0.27 per 1000 starts) and turf (0.31 per 1000 starts) tracks [8]. Fractures during racing that resulted in euthanasia had an incidence of 0.08 per 1000 starts; all of which occurred on turf.