Risk Factor of Anterior Cruciate Ligament Rupture After Ligamentoplasty : What is the Importance of a Relative Deficit of Contralateral Hamstrings Assessed by Isokinetic in Postoperative ?

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.

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Key information

Conditions

Anterior Cruciate Ligament Rupture Anterior Cruciate Ligament Injuries Knee Injuries Leg Injuries Wounds and Injuries

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Rennes University Hospital

Rennes, 35000, France

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Athletic patients all levels
victims of ACL rupture during sports practice,
operated by the same surgeon
having been evaluated in isokinetic postoperative in the Sports Medicine Department of Rennes University Hospital
having resumed a sporting activity
with the first ACL rupture between 01/01/1994 and 12/31/2015

Exclusion criteria

Patients with ACL rupture outside of a sporting context
not having resumed post-operative sports activity on the maximum follow-up period of 15 years
not evaluated for isokinetic activity in the sports medicine department
minors at the time of inclusion

Treatment and study plan

Isokinetic evaluation

Procedure

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.

Primary outcomes

Evaluation of relative hamstrings deficiency versus quadriceps expressed by a concentric hamstrings/quadriceps ratio

Time frame: At inclusion

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.

Secondary outcomes

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.

Time frame: At inclusion

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.

Sponsors and collaborators

Lead sponsor

Rennes University Hospital

Other

Registry information

Acronym: DIS-RRACT

Important dates

Study start: 2017
Primary completion: 2018
Study completion: 2018
First posted: Sep 12, 2018
Registry last updated: Sep 12, 2018

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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