Advancing Athletic Care with GNRB & Dyneelax Sports Medicine Technology

Explore how GNRB and Dyneelax arthrometers are transforming sports medicine technology with their innovative approach to diagnosing and managing ACL injuries. These advanced tools provide unmatched precision, revolutionizing injury assessment and treatment strategies in orthopedics, radiology, and physiotherapy, essential for effective athletic rehabilitation.



Welcome to the Frontier of Athletic Healthcare

Sports medicine is a dynamic field of healthcare dedicated to enhancing athletic performance, preventing sports-related injuries, and facilitating effective rehabilitation. At the core of sports medicine lies a commitment to understanding the unique demands of athletic activities on the human body, especially the intricate mechanisms of the musculoskeletal system.

The Vital Role of Sports Medicine

The realm of sports medicine is not confined to elite athletes; it serves all individuals who seek to maintain an active lifestyle. It bridges various specialties, incorporating expertise from orthopedic surgeons, physiotherapists, sports psychologists, and other health professionals, all unified by a common goal: to ensure the safe and rapid return to activity for patients.

Precision in Diagnosis: A Cornerstone of Effective Treatment

Accurate and timely diagnosis is paramount in sports medicine. The difference between a prompt return to the field and prolonged rehabilitation often hinges on the precision of the initial assessment. Injuries such as partial tears of the anterior cruciate ligament (ACL) can be particularly challenging. They demand diagnostic tools that offer clarity and reliability beyond what conventional imaging techniques can provide.

Enter the World of Advanced Diagnostics

In the pursuit of diagnostic excellence, the sports medicine community continually seeks technologies that push the boundaries of accuracy and efficiency. The GNRB and Dyneelax knee laxity arthrometers represent such advancements. These innovative devices provide objective, quantifiable measures of knee laxity, allowing practitioners to diagnose partial ACL ruptures with greater confidence than ever before.

Empowering Through Innovation

Our mission extends beyond the provision of cutting-edge equipment. We aim to empower sports medicine departments with the knowledge and tools necessary to confront the complexities of ACL injuries. With the GNRB and Dyneelax arthrometers, practitioners can expect a level of sensitivity in diagnosis that sets a new standard in sports medicine.

a doctor reading a document
A doctor writing on a white file. Arthrometer Rehabilitation Tech.
a patient looking at theipad of a doctor.
Knee Orthopedics: orthopaedic surgeon
ACL Research/study: orthopedic surgeon with gloves and blood tissue.
a doctor in front of the laptop

Overview of the GNRB and Dyneelax Sports Medicine Technology

Innovative Approach to Knee Stability Testing

The GNRB and Dyneelax arthrometers are at the forefront of orthopedic diagnostic tools, specifically designed to assess the stability of the knee joint. These devices have revolutionized the way medical professionals approach the examination of the anterior cruciate ligament (ACL), providing precise and reproducible measurements of knee laxity.

Enhanced Diagnostic Confidence

Both arthrometers have been validated through clinical research to have a higher sensitivity in detecting partial ACL ruptures compared to MRI, making them indispensable in sports medicine and orthopedic departments. The ability to measure knee laxity quantitatively means a more accurate diagnosis, individualized treatment planning, and potentially a quicker, safer return to activity for the patient.

A Commitment to Excellence in Patient Care

By incorporating the GNRB and Dyneelax into their practice, healthcare providers are not only adopting the latest in medical technology but also demonstrating a commitment to the highest standard of patient care. These arthrometers are not just tools; they represent a step forward in the pursuit of clinical excellence and optimized patient outcomes in the field of knee injuries.

GNRB Device


Precision and Reliability

The GNRB arthrometer utilizes an automated system to apply consistent anterior force to the tibia, measuring the resulting tibial translation. This quantification helps in assessing the ACL’s condition. The GNRB’s reproducibility and ease of use make it a reliable choice for practitioners looking for a quick and accurate assessment tool in the diagnosis and management of ACL injuries.

Dyneelax knee arthrometer


Dynamic and User-friendly

Matching the GNRB’s commitment to precision, the Dyneelax arthrometer elevates diagnostic capabilities further by implementing both translational and rotational forces. This dual-mechanism approach allows for a more nuanced assessment of the knee’s stability, particularly enhancing the detection of complex instabilities and subtle nuances in partial ACL injuries.

Comparison with Traditional Diagnostic Methods

Enhanced Sensitivity Over MRI

Traditional diagnostic methods for ACL injuries, particularly magnetic resonance imaging (MRI), have been the standard for non-invasive knee assessments. While MRIs provide detailed images of the knee’s structures, they may not always detect subtle abnormalities or quantify the degree of laxity present in partial ACL tears. The GNRB and Dyneelax arthrometers fill this diagnostic gap with their ability to measure knee laxity with exact numerical values, offering a more nuanced understanding of knee stability.

Objective Measurements Versus Manual Tests

Clinical examinations, including manual tests such as the Lachman test or the pivot-shift test, are highly dependent on the clinician’s experience and can be subjective. These tests may vary in sensitivity and specificity. In contrast, the GNRB provides an automated, reproducible force application, and the Dyneelax further refines this by applying both translational and rotational forces, which lead to more consistent and objective outcomes.

Immediate Results for Faster Decision-Making

Unlike MRI, which requires scheduling, image acquisition, and interpretation by a radiologist, the GNRB and Dyneelax arthrometers offer immediate results. This immediacy can be critical in acute settings or when fast decision-making is required, such as in sports events or in the evaluation of athletic injuries during practice or games.

Cost-Effectiveness and Accessibility

MRIs are expensive and not always readily available, which can delay diagnosis and treatment. The GNRB and Dyneelax, once acquired, can be used repeatedly without the per-use costs associated with MRI. Their accessibility and quick turnaround can improve patient throughput in clinical settings, making them cost-effective options for both healthcare providers and patients.

Complementing MRI with Functional Assessment

While the GNRB and Dyneelax do not replace the comprehensive visualization that MRI offers, they provide a functional assessment that complements MRI findings. By integrating these arthrometers into the diagnostic process, clinicians gain a fuller picture of knee health, combining the structural insights of MRI with the functional data from the arthrometers.

Integration in Sports Medicine Programs

Holistic Approach to Athlete Care

Sports medicine programs are designed to support athletes through prevention, diagnosis, treatment, and rehabilitation of injuries. Integrating the GNRB and Dyneelax arthrometers into these programs enhances the standard of care by providing accurate measurements of knee laxity, crucial for athletes' joint health.

Preventive Screenings and Baseline Assessments

The use of GNRB and Dyneelax can be pivotal in pre-participation physical evaluations, offering baseline laxity profiles for athletes. This data becomes invaluable when evaluating the severity of any future injuries, allowing for a comparison to pre-injury levels of knee stability.

Injury Diagnosis and Treatment Planning

When injuries occur, the precise data from these arthrometers assist in diagnosing the extent of ACL damage. This information is essential in creating targeted treatment plans, whether surgical intervention is needed or if a conservative rehabilitation approach is indicated.

Rehabilitation and Return-to-Play Decisions

During the rehabilitation process, periodic assessments with the GNRB and Dyneelax can monitor healing progress and guide the progression of therapy. As the athlete recovers, these tools help in making informed return-to-play decisions, ensuring that the knee is capable of withstanding the demands of the athlete's specific sport.

Research and Outcome Tracking

The objective data from these devices support sports medicine research, providing reliable measurements that can be used in studies evaluating treatment methods, recovery protocols, and long-term outcomes of ACL injuries.

Educational Tool for Athletes and Staff

Incorporating the GNRB and Dyneelax into sports medicine programs also serves an educational function. They help in demonstrating to athletes the importance of knee health, and they can be used to train medical staff, enhancing their understanding of knee mechanics and injury patterns.

Collaborative Care Integration

These arthrometers facilitate a collaborative approach among the multidisciplinary teams involved in sports medicine. Orthopedists, physiotherapists, athletic trainers, and other healthcare providers can share objective data, improving communication and the overall quality of athlete care.

Discover Proven Outcomes

Case Studies

Sports Medicine Technology: a therapist holding the knee of a patient. synthetic acl rehabilitation protocol. BPTB Rehabilitation Protocol. Hamstring Tendon Rehabilitation Protocol.
2017 - ACL Grafts Compliance During Time: Influence of Early Solicitations on the Final Stiffness of the Graft after Surgery

DOI: 10.24966/ORP-2052/100035
Stéphane Nouveau, Henri Robert, Thimothee Viel,
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

Don’t just take our word for it


Your questions answered

Common questions

The GNRB and Dyneelax arthrometers provide objective, quantifiable data on knee laxity, unlike manual tests which can be subjective. The Dyneelax’s ability to apply both translational and rotational forces allows for an even more detailed assessment, making it highly sensitive to partial ACL tears.

While these arthrometers offer superior sensitivity in detecting knee laxity and are excellent for diagnosing ACL injuries, they do not replace the comprehensive imaging MRI provides. Instead, they complement MRI by adding functional assessment to the structural information.

Yes, the GNRB and Dyneelax are designed for a wide range of patient populations, from professional athletes to active individuals. However, specific contraindications related to certain medical conditions should be considered, and it’s best to consult with a healthcare professional for individual cases.

Proper training is essential for the accurate operation of these devices. This typically involves a combination of theoretical knowledge and practical experience, often provided by the manufacturers or through certified training programs.

They are used to establish a baseline of an athlete’s knee laxity, which can be invaluable for comparison after an injury. This baseline data assists in accurately determining the impact of an injury and in making informed decisions regarding treatment and return-to-play timelines.


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

We are here to help!

We're here to assist you on your journey towards better health and precision in diagnosis. Don't hesitate to reach out with any questions or inquiries. Contact us today and let us guide you towards a healthier tomorrow.

Visit us

Bâtiment 60, Rue du Chef de Bataillon Henri Géret
53000 Laval

Email Us

Call Us

+33 7 66 76 03 92 Whatsapp or Phone Call