Dynamic Knee Laxity Measurement Coupled to MRI in Cases of Suspected Partial Anterior Cruciate Ligament Tear

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02787096

Acronym

LaxIRM

Enrollment

151

Registered

2016-06-01

Start date

2012-05-09

Completion date

2017-07-13

Last updated

2025-12-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Anterior Cruciate Ligament Tear

Keywords

dynamic knee laxity measurement, laxi-MRI, partial anterior cruciate ligament tear

Brief summary

Anterior cruciate ligament (ACL) tear is frequent, but the diagnosis of partial tears is difficult. Standard MRI may be used but is of limited diagnostic value. The present study aimed to evaluate the diagnostic interest of dynamic knee laxity measurement coupled to MRI for the diagnosis of ACL tear.

Interventions

DEVICELaxIRM

Dynamic knee laxity measurement coupled to MRI for the diagnosis of ACL tear

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

DIAGNOSTIC

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 60 Years

Healthy volunteers

Inclusion criteria

* knee injury requiring MRI examination * accepting to participate * covered by a health care insurance system

Exclusion criteria

* MRI contraindication * pregnancy * patient included in another study potentially affecting the results * protected patients

Design outcomes

Primary

Measure	Time frame	Description
Anterior tibial translation (ATT) measurement	1 year after the baseline MRI-scan	Time Frame : 1 year after the baseline MRI-scan a follow-up MRI is performed if the patient did not had surgery. ATT is calculated as the difference between the distance from the tangent to the condyle to the tangent to the posterior aspect of the tibial plateau in the stress position and in resting conditions. ATT is measured for the medial and the lateral compartment respectively and the final ATT is the average of medial and lateral ATT.

Secondary

Measure	Time frame	Description
Degree of laxity	1 year after the baseline MRI-scan	1 year after the baseline MRI-scan a follow-up MRI is performed if the patient did not had surgery. Laxity of the torn ligament is defined using a visual scale with the following grading : 0 : No laxity. Grade 1: moderate laxity. Grade 2: severe laxity.
Femorotibial rotation (FTR) value	1 year after the baseline MRI-scan	1 year after the baseline MRI-scan a follow-up MRI is performed if the patient did not had surgery. FTR= arc tan ((ATT lateral-ATT medial)/(slice thickness\number of sagittal slices))\180/π

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026