GNRB with Radio Option - Knee Testing Device

Knee Ligament Analysed: ACL

Tibial Movement: Anterior Translation

Genourob leads in knee testing, introducing the GNRB with Radio option for radiology. Designed with x-ray compatible materials, it provides precise ACL assessments through anterior tibial translation. It's the benchmark for accuracy, aiding radiologists in delivering definitive ACL diagnostics. Genourob's commitment to innovation enhances diagnostic accuracy in knee health care.


Table of Contents

GNRB Radio - Knee Test

GNRB With Radio Option Arthrometer Features

  1. Medical Device: High-Tech Robotic Knee Laxity Arthrometer
  2. Knee Dynamic Assessments Performed:
    • Application of Anterior Tibial Translations to measure the state of resistance of the ACL.
  3. Material Used: The material used on this GNRB is specialy designed to be used in a radiology environment.
  4. Software: LDA Software – A user-friendly software developed by Genourob for optimal objective testing of the knee ligaments with an easy to access exportable database.
  5. Population: Wide range of normative data, from pediatric through adults, ages 8 – 100.
  6. After Sale: Excellent after-sale support, installation and continuing education programs.
  7. Warranty: 2 year-warranty.
  8. Shipment: Worldwide.

GNRB Arthrometer

The 4 in 1 solution for those who value precision in knee ligaments assessments!

1) ACL Diagnosis
2) ACL Prevention
3) ACL Rehabilitation
4) ACL Follow-up

The GNRB with Radio Option Knee Laxity Arthrometer stands at the forefront of innovative medical tools tailored for meticulous detection, prevention, rehabilitation, and management of knee ligament disorders, primarily focusing on the anterior cruciate ligament (ACL).

Distinct from conventional arthrometers, the GNRB with Radio Option employs automated anterior tibial translation, delivering a comprehensive and precise evaluation of knee integrity. Designed specifically for the radiology department, its components are radiography-compatible, ensuring seamless integration. Notably, in identifying partial ACL disruptions, this GNRB variant surpasses traditional MRI techniques, guaranteeing unmatched diagnostic precision and fostering a tailored therapeutic strategy for patients. Experience excellence in ACL analysis with the GNRB’s radiology-optimized solution.

What is GNRB Radio?

Unlock unparalleled clarity in knee ligament assessment with GNRB: where precision meets simplicity, redefining the gold standard in ligament diagnostics & Treatment.

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.

Why Arthrometers Over MRI?

Cost-Efficient Diagnosis (90% Cost Reduction)

Economic benefits with reduced costs for both practitioners and patients.

Instantaneous & More Accurate Diagnostics

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

Non-Invasive Evaluation

Reduces the need for invasive diagnostic procedures.

Free Space in MRI Rooms

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

In the 17 years since Genourob unveiled the pioneering GNRB computerized knee laxity arthrometer, the medical landscape has witnessed profound transformations. This landmark innovation, combined with subsequent breakthroughs like Dyneelax, has firmly placed us as the preferred arthrometer in elite medical establishments and esteemed research entities globally.

From sports medicine and orthopedics to pediatric health and further realms, industry leaders acknowledge the unmatched significance of our knee laxity arthrometers. These devices emerge as paragons of precision and reliability in the discipline, underlined by the invaluable insights they present. However, it transcends mere data—it embodies a route to enhanced patient well-being, serves as a pillar for groundbreaking research, and represents the distinctive badge that propels a facility into a league of unmatched excellence.

How is GNRB Radio used by Medical Practitioners?

GNRB: A 4 in 1 high-tech Medical Device

Diagnosis of ACL Injuries

Harnessing GNRB, we redefine ACL injury diagnosis. Especially with partial ACL ruptures, surpassing MRI's capabilities. Enter a new era of confident, precise assessments. Your knee's health, unmistakably reaffirmed.

Rehabilitation of ACL Injuries

Embrace GNRB's revolutionary technology as we guide you through the journey of ACL injury rehabilitation. Witness a transformation in recovery, where hope meets innovation. Rebuild with confidence and conviction.

Spomed Dyneelax leg strepped.

Prevention of ACL Injuries

Utilizing the cutting-edge capabilities of GNRB, we unveil proactive strategies to prevent ACL injuries. Venture into a future where knee safety is prioritized. Protect and prevent, with assurance.

Follow-Up of the ACL

With GNRB as our compass, embark on a path of vigilant follow-up care for ACL injuries. Enter a realm where progress is measured, and healing is tracked with precision. Your journey, our commitment.

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

In which Healthcare Departments is GNRB utilized?

What defines GNRB Radio as a crucial asset in top-tier facilities and what features does it offer?

Enhanced Objective Knee Testing through Dynamic Assessments

Leverage the precision of our arthrometer's objective data to gain profound insights into the intricate resistance conditions of the ACL with our radiology-optimized version.

The GNRB with Radio option ushers in a groundbreaking advancement in knee laxity assessments tailored for the radiology department. Built with radiography-friendly materials, it provides quantifiable data, dramatically reducing the common subjectivity found in traditional evaluations. This edition's forte lies in its ability to meticulously gauge anterior tibial translation, furnishing an in-depth view of ACL stability—2023 – [Theo Cojean] – An investigation into its sensitivity, repeatability, and reproducibility, conducted using a leg prototype of the uniquely crafted knee arthrometer, GNRB with Radio option.

Objective evaluations are seamlessly presented through illustrative graphics that trace the compliance trajectories under varied force applications to the tibia. This level of granularity is essential for distinguishing between healthy and compromised knees. With its automated anterior drawer tests, the GNRB with Radio option outclasses conventional market competitors, such as the KT-1000 and KT-2000, especially in radiological contexts.​

In 2023, a study by Theo Cojean highlighted GNRB's sensitivity, repeatability, and reproducibility. Furthermore, studies from 2012 Collette et al., 2017 Jenny et al., 2022 Kayla Smith, and 2023 Magdic have validated the efficiency of GNRB in diagnosing ACL ruptures, reinforcing their clinical significance. It should be noted that GNRB technology is incorporated in the Dyneelax.

a patient looking at theipad of a doctor.
Knee Orthopedics: orthopaedic surgeon
a Doctor with an ipad
A doctor writing on a white file. Arthrometer Rehabilitation Tech.
GNRB Device - ACL Assessment- Knee Laxity Testing Device

The GNRB with Radio option is the very embodiment of the next-generation ACL diagnostic tools. Seamlessly integrating anterior tibial translation, it offers an objective appraisal of the ACL. Crafted with radiography-friendly materials, it finds its niche in the domain of imaging, consistently outshining traditional diagnostic methods, especially when it pertains to partial ACL tears.

In a 2023 diagnostic study steered by Theo Cojean, pitting the GNRB Radio version against MRIs in real-world clinical settings for the detection of both full-fledged and partial ACL tears, the findings—corroborated via arthroscopy on a sample of 214 patients—accentuated the GNRB’s superior sensitivity and pinpoint diagnostic precision.

This enhanced discernment is not merely a nod to the GNRB’s unmatched diagnostic prowess but also a reflection of its cost-effectiveness and unparalleled adaptability in radiology settings. It furnishes an answer to several challenges tied to MRI when diagnosing partial ACL tears.

Emerging as a precise, wallet-friendly, and radiology-optimized tool, the GNRB with Radio option yields results that stand clear-cut, devoid of the requirement for extensive indoctrination. It stands tall as a versatile instrument, harmonizing the processes of diagnosis, prevention, rehabilitation, and consistent patient monitoring related to knee ligament issues. With its clear, incisive, and uncomplicated results, the GNRB with Radio option carves its niche as the apex choice for ACL diagnostic needs, offering a swift, cost-conscious, and user-focused alternative to traditional MRI.

The unparalleled consistency observed in results from the GNRB with Radio option knee laxity arthrometer underscores its unwavering reliability, particularly tailored for the radiology department. Its distinctive precision is realized through the amalgamation of radiography-friendly materials, advanced sensors, and clearly delineated protocols. These elements not only simplify the user experience but also significantly enhance measurement accuracy. A defining feature of the GNRB with Radio option is its ability to meticulously maintain uniform initial conditions for every assessment, guaranteeing the patient’s optimal positioning in radiographic evaluations.

This level of stringent control in testing ensures that results are not only comparable across individual evaluations but also over extended periods. This becomes particularly vital for long-term studies and post-operative assessments following Anterior Cruciate Ligament (ACL) surgery. The uniform data produced by the GNRB with Radio option stands testament to its credibility, further elevating its reputation within the medical and radiological circles. Renowned studies, such as one that compared the GNRB with other notable arthrometers, have shown that its precision is on par with leading navigation systems. Additionally, a 2023 study by Renata Vauhnik in Slovenia emphasized the GNRB  arthrometer’s exceptional reproducibility, underscoring its preeminence in producing dependable, consistent, and unbiased ACL evaluations.

With accolades pouring in from both clinical and scholarly sectors, the GNRB with Radio option stands out as an indispensable instrument for medical professionals who prioritize detailed and standardized assessments of knee laxity. As you navigate our website,, you’ll discover the prowess of this device in revolutionizing ACL analysis.

Precision & Reproducibility: The GNRB Arthrometer's Credibility in Consistent Knee Laxity Assessments

The cutting-edge GNRB with Radio option has established itself as the gold benchmark in knee laxity assessment, especially post-Anterior Cruciate Ligament (ACL) reconstruction surgery. Specifically curated for the radiology department, this modern device is adorned with materials tailored for radiography. A prevalent apprehension among clinicians centers around the unintended damage to the ACL graft during evaluations. However, it’s vital to underscore that the GNRB with Radio guarantees forces that are meticulously calibrated, consistently remaining below potential harm thresholds. To lend context, while mundane activities such as walking can inflict nearly 350N (Download Nagura Study – 2006 or DOI: 10.1123/jab.22.4.305) of force on the ACL, this avant-garde arthrometer scrupulously ensures a moderated 100N of anterior tibial translation when scrutinizing post-operative ACL grafts. This exactitude significantly mitigates potential graft adversities. Place unwavering confidence in the GNRB with Radio option for impartial, secure, and efficient ACL evaluations.

Safe ACL Assessments with GNRB

Before undergoing any surgical interventions, the GNRB Arthrometer with Radio option is adept at applying forces of up to 200N, ensuring a thorough examination of knee inconsistencies while maintaining an ample safety margin. Controlled by a sophisticated computer system, this device guarantees not only the highest safety standards but also consistency in its evaluations. This rigorous calibration is crucial for precise post-surgical assessments, offering insights into graft health and the ongoing healing process. Bertrand Semay’s 2016 study (DOI: 10.1016/ focuses on the evolution of anteroposterior laxity in ACL reconstruction patients, measured by the GnRB device at 6, 9, and 12 months post-surgery (. It underscores the importance of monitoring ligament laxity for effective rehabilitation. 

Furthermore, Nouveau’s 2017 research (DOI: 10.24966/ORP-2052/100035) investigates the impact of early rehabilitation activities on the stiffness of ACL grafts, emphasizing the significance of balancing early mobilization with graft healing. Another interesting study is from Forelli in 2023 (DOI: 10.26603/001c.73031). It introduces a comprehensive rehabilitation approach, particularly for soccer players, stressing the need for a blend of clinical and sport-specific assessments to ensure a successful and safe return to play. These studies collectively advance the understanding of ACL injury management from surgical recovery to customized rehabilitation.

The insights gleaned from these analyses are invaluable, supplying medical professionals with essential data during the critical post-surgical recovery phase. This detailed information becomes the bedrock for designing tailored rehabilitation programs, paving the way for enduring knee stability in the years to come. Leveraging its motorized features, the GNRB Arthrometer with Radio option can safely conduct evaluations as soon as one month after surgery, utilizing minimal forces and torques to ensure a thorough yet gentle review process. The meticulous design and stringent controls of the GNRB Arthrometer attest to its resolute dedication to patient well-being, cementing its role as an invaluable instrument in contemporary knee ligament diagnosis and treatment strategies.

Integrated Software and Assured Durability: Our Organizational and Warranty Commitments

hands typing on a laptop

The flawless interfacing between our devices, particularly the GNRB with its advanced Radio option, and the proprietary LDA software exemplifies Genourob’s commitment to streamlined and efficient functionality. Specifically engineered by Genourob, the LDA software is instrumental in conducting tests. It presents a harmonious amalgamation of functional capacities with a user-centric design philosophy. Besides simplifying the testing processes, this software acts as an integrated data repository, diligently documenting every patient’s assessment. With outcomes being digitalized and automatically archived, handling large volumes of data is conspicuously easier. This proficient structuring boosts operational flow and encourages enhanced interchange of information, ensuring pivotal data remains both instantly available and safeguarded.

Our confidence in the resilience and reliability of our devices, especially the GNRB with the Radio option, is amplified by providing a 2-year warranty. This guarantee stands as a testament to the detailed artisanship and stringent quality checks that define our production. Patrons can rest assured that their selected device, with its state-of-the-art Radio feature, is constructed for rigorous clinical utilization, fortified by warranty assurances. Such warranty provisions emphasize our relentless drive for client contentment and our steadfast commitment to crafting elite-caliber products.

What are the Technical Specifications of GNRB?

Main Specifications

  • The medical device is a device to help diagnose partial or total lesions of the knee’s cruciate ligament
  • Must be used by a healthcare professional
  • The device can be used to help with diagnosis, to follow the evolution of a pathology or ligamentoplasty (cruciate ligament operation).
  • The principle of the device is to apply a thrust force on the calf thanks to an articulated mechanical system and to record the displacement of the tibia in relation to the femur for each force thanks to a sensor placed on the Anterior Tibial Tuberosity (ATT).
  • Measurements are taken on both lower limbs and the analysis of the lesions can be done by observingthe difference between these two values and especially by comparing the slope of the curves obtained.
  • The system includes a 3-level safety system based on mechanic and software controlled mechanism.

Software Specifications

  • The software ensures optimal use of the product to avoid handling errors. Very intuitive and easy to use, the operator is guided on the different parameters to be validated before launching the tests.
  • The system allows for easy register of patient.
  • The software should automatically apply chosen test.
  • The software helps to practice a test with the same parameter from the most recent examen.
  • The software offers a easy-to-read graphs with colors accompanied by a chart.

Standard Accessories

  • Operating instructions
  • Computer/tablet
  • Software
  • Power cable
  • USB cable

Optional Accessory

  • PCL Option
  • Rotab Option
  • Radio Option

Technical Data

  • Power Supply: Input Voltage 230 VAC, Input Frequencies 50 or 60 Hz
  • Dimension (standard position): 930 x 270 x 500 mm
  • Weight: 15Kg
  • Maximum Patient Weight: 135Kg

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