An observational study in Anterior Cruciate Ligament Rupture, sponsored by Rennes University Hospital. Completed at 1 site in France. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-09-12.
Sponsored by Rennes University Hospital · Observational
Anterior cruciate ligament (ACL) is a common pathology (37 000 operations in 2006, nearly 43 000 in 2012 in France) justifying more and more operating indications in younger and younger patients. 70-80% of ACL ruptures occur without contact, which makes it a major public health interest because of its frequency and accessibility in terms of prevention.
The place of isokinetic assessment is important pre and postoperatively so that it has become systematic.
The main risk factors for known ACL lesions are female gender, pivotal sports, neuromuscular deficits, proprioceptive, hormonal, morphological deficits ... Moreover, there is also an increase in the number of contralateral fractures in patients who had a ligamentoplasty. There are many articles on the ACL pathology but unequal on the potential risk factors. The only proven risk factor for contralateral rupture is the age of the first episode; the female sex also seems to be important in some studies but remains more controversial. However, many factors have been studied: the intensity of the sport, the sex, the operative technique of ligamentoplasty, the operating duration, the duration of recovery of the sports activity, the level of recovery (of this sporting activity ) ...
Isokinetics is used to measure the peak of strength of quadriceps and hamstrings, in concentric or eccentric, at slow and fast speed and to determine a hamstring / quadriceps ratio to highlight a deficit or imbalance.
557 studies on the registry are indexed under Rupture; 97 are open to participants now.
This study's enrollment of 141 is above the median of 100 across 203 observational studies indexed under Rupture.
Browse Rupture studies →Rennes University Hospital is the lead sponsor of 440 studies on the registry; 51 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Athletic patients who have consulted in Sports Medicine Department at Rennes University Hospital
Exclusion Criteria:
Athletic patients who have consulted in Sports Medicine Department at the Rennes University Hospital, victims of an ACL rupture during sports activity and who declared a contralateral ACL after the ligamentoplasty. Isokinetic evaluation.
Procedure: Isokinetic evaluation
Athletic patients who have consulted in Sports Medicine Department at Rennes University Hospital, without ACL rupture. Isokinetic evaluation.
Procedure: Isokinetic evaluation
Isokinetics is used to measure the peak of strength of quadriceps and hamstrings, in concentric or eccentric, at slow and fast speed to determine a hamstring / quadriceps ratio to highlight a deficit or imbalance.
Evaluation of relative hamstrings deficiency versus quadriceps expressed by a concentric hamstrings/quadriceps ratio
Isokineticism makes it possible to measure the peak of force of quadriceps and hamstrings. Concentric hamstrings/quadriceps ratio in isokinetic is calculated to detect a relative deficiency if it is below threshold values of 55% at 60 °/s slow speed, or 65% at 180 °/s fast speed.
Time frame: At inclusion
Investigating whether a lack of recruitment of hamstring at fast speed is a potential risk factor for ACL rupture, by evaluating hamstrings/quadriceps ratio in isokinetics.
The lack of recruitment of the hamstrings when increasing speed is defined as normal ratios of peaks of force at the two speeds in isokinetic, but with an increase of the ratio hamstrings/Quadriceps in concentric at fast speed lower than 10%, with reference to the value of the ratio hamstrings/Quadriceps at slow speed.
Time frame: At inclusion
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in Sep 2018. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Rennes University Hospital