Knee Ligament Injury Diagnosis with GNRB & Dyneelax Arthrometers: Precision in ACL Rupture Detection

Learn about the GNRB & Dyneelax Arthrometers for enhanced knee ligament injury diagnosis, offering greater sensitivity and efficiency than MRIs. Our content covers case studies, surgeon testimonials, and integration tips for these diagnostic tools. Improve patient care with fast, precise assessments of knee laxity to aid in effective treatment planning. Gain insight into the technological advantages and practical application of these devices in identifying knee injuries.



Understanding the Complexity of Knee Ligament Injuries

The human knee is a marvel of biomechanical engineering, intricately combining bones, ligaments, tendons, and muscles to facilitate movement. However, its complexity also makes it susceptible to a range of injuries, with knee ligament damage being one of the most common and challenging to diagnose accurately.

The Diagnostic Dilemma: Navigating Traditional Methods

Traditionally, Magnetic Resonance Imaging (MRI) has been the gold standard for diagnosing knee ligament injuries. Yet, it has its limitations, particularly when it comes to detecting partial Anterior Cruciate Ligament (ACL) ruptures. The need for precise, quick, and reliable diagnostic tools is evident, especially in the realms of sports medicine, orthopedics, and physical therapy.

A Leap Forward: Arthrometers as Diagnostic Game-Changers

Enter the GNRB & DyneeLax arthrometers: state-of-the-art diagnostic devices that have reshaped the landscape of knee injury diagnosis. These arthrometers stand out for their ability to provide highly sensitive and accurate measurements of knee laxity, thus enabling healthcare professionals to pinpoint even the most subtle ligament injuries with unparalleled precision.

Revolutionizing Diagnosis: From Uncertainty to Precision

In this section, we explore how the GNRB & DyneeLax arthrometers have transformed the diagnosis of knee ligament injuries. By offering a more detailed and accurate assessment compared to traditional methods, these tools enable timely and effective interventions, ensuring optimal outcomes for patients and athletes alike.

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A doctor writing on a white file. Arthrometer Rehabilitation Tech.
a patient looking at theipad of a doctor.
a man climbing a rope
a man running on tennis court
a man scoring in basketball

Why Arthrometers Over MRI?

Sensitivity: A Recent study (DOI: 10.1016/j.knee.2023.03.017) has shown GNRB & Dyneelax arthrometers exhibit superior sensitivity in diagnosing partial ACL ruptures. Where MRIs might miss or misinterpret the minutiae of a partial rupture, these arthrometers catch them.

Cost-Efficient Diagnosis (90% Cost Reduction)

Economic benefits with reduced costs for both practitioners and patients.

Non-Invasive Evaluation

Reduces the need for invasive diagnostic procedures.

Instantaneous & More Accurate Diagnostics of ACL, PCL, AM-PL & AL-PM Corners

Immediate accurate results about the state of resistance of the ACL without waiting for imaging processing.

Free Space in MRI Rooms

Creates room for individuals battling more severe pathologies, like certain forms of Cancers.

dyneelax seem from the side

Mechanism of Action

How Arthrometers Works: The GNRB & Dyneelax arthrometers function by measuring the anterior displacement/rotation of the tibia in relation to the femur, assessing knee joint laxity. By applying precise force, they can gauge the degree of ligament injury.

Comparison with MRI: Unlike MRI, which provides imaging slices of the knee’s anatomy, the arthrometers directly measure the mechanical response of the knee to specific stress, offering a direct assessment of ligament function.

Technology Begind GNRB & Dyneelax: Employing advanced biomechanical analysis, the GNRB & Dyneelax arthrometers measure knee laxity with precision. Their innovative design enables a non-invasive and rapid assessment of knee ligament integrity, aiding in the early detection and accurate diagnosis of injuries.

Discover Proven Outcomes

Case Studies

a window with a doctor in a room
2023 - GNRB® laximeter with magnetic resonance imaging in clinical practice for complete and partial anterior cruciate ligament tears detection: A prospective diagnostic study with arthroscopic validation on 214 patients.

DOI: 10.1016/j.knee.2023.03.017
Theo Cojean, Cecile Batailler, Henri Robert, Laurence Cheze
CHU Nantes, CHU Angers, CH Laval (French Hospitals)
A doctor writing on a white file. Arthrometer Rehabilitation Tech.
2023 - Sensitivity, repeatability and reproducibility study with a leg prototype of a recently developed knee arthrometer: The DYNEELAX®

DOI: 10.1016/j.medntd.2023.100254
Theo Cojean, Cecile Batailler, Henri Robert, Laurence Cheze
Université Gustave Eiffel, Lyon, France

Together, We Achieve

In the world of medicine, precision is not an option but a necessity. Let's strive for accurate diagnoses and swift recoveries.

Embrace the tools that lead us to precise answers and foster a swift journey to health.

Explore the transformative applications of GNRB & Dyneelax arthrometers in diagnosing knee ligament injuries. From accurately detecting partial ACL ruptures to offering a comprehensive assessment of other ligaments and demonstrating real-world efficacy through case studies, these arthrometers are revolutionizing knee diagnostics.

Applications in Knee Ligament Injury Diagnosis

ACL/PCL Tear Analysis

Explore a new horizon in knee diagnostics with our advanced arthrometers, meticulously designed to accurately identify complete tears in both the Anterior Cruciate Ligament (ACL) and the Posterior Cruciate Ligament (PCL). Ensure precise and reliable assessments that pave the way for effective treatment plans.

AM & PL Bundles Evaluation

Discover the precision in evaluating the ACL's Anteromedial (AL) and Posterolateral (PM) bundles. Our arthrometers shine by delivering detailed insights into partial tears, ensuring healthcare professionals can gauge the severity of ligament injuries with unmatched accuracy.

AM-PL & AL-PM Corners Assessment

Tap into Dyneelax's pioneering rotation features, meticulously crafted to scrutinize the Anteromedial-Posterolateral (AM-PL) and Anterolateral-Posteromedial (AL-PM) corners. Elevate your diagnostic practice with a thorough understanding of knee stability and make informed decisions seamlessly.
Leg strapped to Dyneelax



Step 1

Patient is comfortably positioned with the knee at a specific flexion angle.

Step 2

The knee is strapped on the arthrometer, ensuring proper placement.

Step 3

A controlled force/torque is applied, and the tibial displacement is measured.

Step 4

Results of both knees are saved & compared. A diagnosis is done depending on the results.

Don’t just take our word for it


Integration into Practice:

Seamless Integration for Enhanced Diagnostic Precision

Ease of Use

The intuitive design and user-friendly interface of the GNRB & Dyneelax arthrometers facilitate easy operation, requiring minimal training. This ease of use allows for a quick adoption by medical staff, contributing to a more efficient diagnostic process.

Immediate Diagnostic Insights

Comprehensive training sessions are offered to ensure that your team is proficient in utilizing the arthrometers to their full potential. Our dedicated support team is also on standby to provide assistance and answer any queries, ensuring a smooth integration into your practice.

Brand-first approach

Unlike other diagnostic methods that may require lengthy processing times, the GNRB & Dyneelax arthrometers provide immediate insights into knee laxity. This feature is invaluable in fast-paced clinical settings, aiding in quicker decision-making and treatment planning.


By enabling precise diagnoses right at the point of care, these arthrometers can potentially reduce the need for more expensive and time-consuming diagnostic procedures like MRI. This cost-efficiency makes them a valuable addition to practices looking to optimize their diagnostic expenditures.

Enhanced Patient Experience

By providing accurate and quick diagnoses, the GNRB & Dyneelax arthrometers contribute to an improved patient experience. Patients can receive timely and precise information regarding their knee ligament health, which is crucial for building trust and ensuring satisfaction.

Continuous Updates and Improvements

Our commitment to excellence ensures that the GNRB & Dyneelax arthrometers are continuously updated to incorporate the latest advancements in diagnostic technology. These updates aim to provide your practice with a cutting-edge tool that evolves alongside the rapidly advancing medical field.

Your questions answered

Common questions

The GNRB & DyneeLax arthrometers precisely measure knee laxity by applying a controlled force/torque and evaluating the tibial displacement/rotation. This data can help identify and diagnose knee ligament injuries, including partial and complete tears.

While MRI scans are essential for visualizing knee anatomy, GNRB & DyneeLax arthrometers excel in identifying subtle ligament laxity with higher sensitivity. This is especially beneficial in diagnosing partial ACL ruptures, which may sometimes be challenging to detect with MRI alone.

The GNRB & DyneeLax arthrometers can provide immediate quantitative data on knee laxity during an office visit, facilitating quick and informed diagnostic decisions.

Yes, the Dyneelax is designed to assess the laxity of all knee ligaments, providing valuable information for diagnosing injuries to the ACL, PCL, AM-PL & AL-PM Corners.

Absolutely. The GNRB & DyneeLax arthrometers are excellent tools for tracking recovery progress post-surgery, allowing healthcare professionals to adjust rehabilitation plans as needed.


To assist healthcare professionals in leveraging the GNRB & DyneeLax arthrometers to their fullest potential, we have curated a collection of resources. These are designed to provide comprehensive insights, from basic setup and operation to in-depth diagnostic procedures. These resources aim to facilitate seamless integration of these innovative tools into your diagnostic practice, ensuring accurate and timely identification of knee ligament injuries.

Research Articles & Clinical Studies:

2023 - GNRB® laximeter with magnetic resonance imaging in clinical practice for complete and partial anterior cruciate ligament tears detection: A prospective diagnostic study with arthroscopic validation on 214 patients.
DOI: 10.1016/j.knee.2023.03.017

2023 - Sensitivity, repeatability and reproducibility study with a leg prototype of a recently developed knee arthrometer: The DYNEELAX®
DOI: 10.1016/j.medntd.2023.100254

2019 - Anterior knee translation measurements after ACL reconstruction are influenced by the type of laximeter used.
DOI: 10.1007/s00167-020-05950-5

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