Magnetic Resonance Imaging Parameters for Assessing Risk of Recurrent Hamstring Injuries in Elite Athletes
-
- George Koulouris
- Department of Medical Imaging, Victoria House Hospital, Prahran, Melbourne, Victoria, Australia
-
- David A. Connell
- Department of Radiology, Royal National Orthopaedic Hospital, Stanmore, London, United Kingdom
-
- Peter Brukner
- Centre for Health, Exercise and Sports Medicine, University of Melbourne, Melbourne, Victoria, Australia
-
- Michal Schneider-Kolsky
- Department of Medical Imaging, Victoria House Hospital, Prahran, Melbourne, Victoria, Australia
説明
<jats:sec><jats:title>Background</jats:title><jats:p> Magnetic resonance (MR) imaging has established its usefulness in diagnosing hamstring muscle strain and identifying features correlating with the duration of rehabilitation in athletes; however, data are currently lacking that may predict which imaging parameters may be predictive of a repeat strain. </jats:p></jats:sec><jats:sec><jats:title>Purpose</jats:title><jats:p> This study was conducted to identify whether any MR imaging-identifiable parameters are predictive of athletes at risk of sustaining a recurrent hamstring strain in the same playing season. </jats:p></jats:sec><jats:sec><jats:title>Study Design</jats:title><jats:p> Cohort study; Level of evidence, 3. </jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p> Forty-one players of the Australian Football League who sustained a hamstring injury underwent MR examination within 3 days of injury between February and August 2002. The imaging parameters measured were the length of injury, cross-sectional area, the specific muscle involved, and the location of the injury within the muscle-tendon unit. Players who suffered a repeat injury during the same season were reimaged, and baseline and repeat injury measurements were compared. Comparison was also made between this group and those who sustained a single strain. </jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p> Forty-one players sustained hamstring strains that were positive on MR imaging, with 31 injured once and 10 suffering a second injury. The mean length of hamstring muscle injury for the isolated group was 83.4 mm, compared with 98.7 mm for the reinjury group (P = .35). In the reinjury group, the second strain was also of greater length than the original (mean, 107.5 mm; P = .07). Ninety percent of players sustaining a repeat injury demonstrated an injury length greater than 60 mm, compared with only 58% in the single strain group (P = .01). Only 7% of players (1 of 14) with a strain <60 mm suffered a repeat injury. Of the 27 players sustaining a hamstring strain >60 mm, 33% (9 of 27) suffered a repeat injury. Of all the parameters assessed, only a history of anterior cruciate ligament sprain was a statistically significant predictor for suffering a second strain during the same season of competition. </jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p> A history of anterior cruciate ligament injury was the only statistically significant risk factor for a recurrent hamstring strain in our study. Of the imaging parameters, the MR length of a strain had the strongest correlation association with a repeat hamstring strain and therefore may assist in identifying which athletes are more likely to suffer further reinjury. </jats:p></jats:sec>
収録刊行物
-
- The American Journal of Sports Medicine
-
The American Journal of Sports Medicine 35 (9), 1500-1506, 2007-09
SAGE Publications