Exploring Electronystagmography Devices (ENG): Types, Benefits and Uses

Understanding the Importance of Laboratory Incubators in Scientific Research

In the fast-paced world of medical diagnostics, Electronystagmography Devices (ENG) have emerged as revolutionary tools for the accurate diagnosis and treatment of vestibular disorders. These sophisticated devices provide invaluable insights into balance and eye movement disorders, aiding medical professionals in delivering optimal patient care. In this blog, we will delve into the functionality, benefits, and applications of ENG devices, shedding light on their significance in the field of medicine.

Understanding the Functionality

At the heart of electronystagmography devices lie advanced sensors and technology that monitor eye movements and analyze their patterns. By precisely tracking and recording eye motion, ENG devices help identify abnormalities that may indicate underlying vestibular or neurological conditions. This blog post will take you on a journey through the intricate workings of ENG devices, unraveling the technical aspects that make them an indispensable tool in the medical industry.

Types of Electronystagmography Devices (ENG)

There are several types of Electronystagmography (ENG) tests commonly used in medical settings to assess vestibular function and diagnose balance and eye movement disorders. These tests help evaluate the coordination between the eyes and the inner ear, providing valuable insights into various conditions. Here are some of the types of ENG tests

  1. Spontaneous Nystagmus Test: This test measures the presence of spontaneous nystagmus, which is an involuntary rhythmic eye movement that occurs without any visual stimulus.
  2. Gaze Nystagmus Test: Gaze nystagmus is evaluated by asking the patient to focus their gaze on different points while observing the eye movements. This test helps assess eye movement control in various directions.
  3. Saccade Test: Saccades are rapid eye movements that redirect gaze from one point to another. The saccade test evaluates the accuracy and speed of these movements.
  4. Smooth Pursuit Test: Smooth pursuit testing assesses the ability to smoothly track a moving target with the eyes, measuring eye movements during tracking.
  5. Optokinetic Nystagmus Test: This test involves using a rotating drum or moving visual pattern to elicit optokinetic nystagmus, which helps evaluate the tracking ability of the eyes.
  6. Positional Nystagmus Test: Positional nystagmus is assessed by changing the position of the patient’s head and observing any abnormal eye movements that occur in response to these positional changes.
  7. Caloric Test: The caloric test involves irrigating warm or cool water or air into the ear canal to induce nystagmus. This test helps assess the function of the inner ear and the vestibular system.
  8. Dix-Hallpike Test: The Dix-Hallpike test is used to diagnose benign paroxysmal positional vertigo (BPPV). It involves a specific head and body positioning to elicit nystagmus and vertigo symptoms.

Advantages of Electronystagmography Devices (ENG)

There are several advantages of electronystagmography (ENG) that make it a valuable tool in the diagnosis and treatment of vestibular disorders:

  1. Accurate Assessment: ENG provides precise and objective measurements of eye movements, allowing for accurate assessment of vestibular function and abnormalities. It helps identify and differentiate between various types of eye movement disorders, aiding in accurate diagnosis.
    Comprehensive Testing: ENG enables healthcare professionals to perform a wide range of tests, including saccades, gaze, pursuit, positional, Dix Hallpike, caloric, and optokinetic tests. This comprehensive testing allows for a thorough evaluation of the vestibular system and helps pinpoint the underlying cause of balance and eye movement issues.
  2. Comprehensive Testing: ENG enables healthcare professionals to perform a wide range of tests, including saccades, gaze, pursuit, positional, Dix Hallpike, caloric, and optokinetic tests. This comprehensive testing allows for a thorough evaluation of the vestibular system and helps pinpoint the underlying cause of balance and eye movement issues.
  3. Non-Invasive: ENG testing is non-invasive and does not cause any discomfort to the patient. It involves placing electrodes near the eyes to monitor eye movements, eliminating the need for invasive procedures.
  4. Real-Time Monitoring: ENG provides real-time monitoring of eye movements, allowing healthcare professionals to observe and analyze eye movement patterns immediately. This real-time feedback assists in making quick assessments and adjustments during the testing process.
  5. Diagnostic Aid: ENG serves as a diagnostic aid in identifying and differentiating between various vestibular disorders, such as benign paroxysmal positional vertigo (BPPV), vestibular neuritis, Meniere’s disease, and more. It helps healthcare professionals determine the appropriate treatment plan for each patient based on their specific condition.
  6. Treatment Monitoring: ENG can also be used to monitor the effectiveness of treatments for vestibular disorders. By comparing pre- and post-treatment ENG test results, healthcare professionals can evaluate the progress of the patient and adjust treatment strategies accordingly.
  7. Research Tool: ENG is widely used in clinical research to study and understand vestibular disorders, contributing to advancements in the field. It allows researchers to gather objective data on eye movements, aiding in the development of new diagnostic techniques and treatment modalities.

Overall, the advantages of ENG include its accuracy, comprehensiveness, non-invasiveness, real-time monitoring, diagnostic aid, treatment monitoring capabilities, and its role as a valuable research tool. These advantages make ENG an essential tool in diagnosing and managing vestibular disorders, leading to improved patient care and outcomes.

Exploring the Advanced Diagnostic Tools

Electronystagmography devices have revolutionized the diagnostic landscape by offering cutting-edge features and capabilities. From wireless ENG devices that enhance mobility and patient comfort to portable solutions that empower medical professionals with flexibility, we will explore the latest advancements in the field. Discover how these state-of-the-art tools have transformed ENG testing, ensuring accurate diagnosis and facilitating targeted treatment.

ENT Applications of Electronystagmography Devices (ENG)

Otolaryngologists, or ENT specialists, rely on the valuable insights provided by electronystagmography devices in diagnosing various ear-related conditions. We will explore the wide-ranging applications of ENG testing in otolaryngology, uncovering its role in supporting accurate diagnosis and facilitating optimal patient care. Gain a deeper understanding of how ENG devices are transforming the field of ENT.

Electronystagmography vs. Videonystagmography

Two prominent diagnostic tools for evaluating vestibular function are electronystagmography (ENG) and videonystagmography (VNG). This blog post will present a comprehensive comparison between these two methods, highlighting their differences, similarities, and respective applications. Discover which option may be more suitable for specific diagnostic scenarios, enabling medical professionals to make informed decisions.

Both videonystagmography (VNG) and electronystagmography (ENG) are diagnostic procedures that aid in assessing and quantifying abnormal eye movements, also known as nystagmus. Both tests are commonly used in the field of otolaryngology (ear, nose, and throat) to assess balance and detect underlying vestibular disorders.

Here’s a comparison of electronystagmography (ENG) and videonystagmography (VNG):


Electronystagmography (ENG): ENG involves the use of electrodes placed around the eyes to record and measure eye movements. It primarily measures the electrical potential generated by eye movements.
Videonystagmography (VNG): To record eye movements, VNG attaches infrared video cameras to the patient’s goggles.It captures video footage of eye movements and analyzes them.


Electronystagmography (ENG): ENG typically requires specialized equipment with electrodes and amplifiers to detect and measure eye movements. The electrodes are placed near the eyes, usually with adhesive or skin contact.
Videonystagmography (VNG): VNG employs infrared video cameras mounted on goggles that are worn by the patient. The goggles have multiple cameras to capture eye movements accurately.

Eye Movement Recording

Electronystagmography (ENG): ENG records eye movements by measuring the changes in electrical potential around the eyes. The electrodes detect these changes and provide data for analysis.
Videonystagmography (VNG): VNG captures video footage of eye movements using infrared cameras. The video recordings are then analyzed by software to assess the type and characteristics of nystagmus.


Electronystagmography (ENG): ENG has been used for many years and has a long history of clinical use. It can provide precise measurements of eye movements and is often used in research settings.

Videonystagmography (VNG): VNG offers the advantage of recording and analyzing eye movements in real-time using video technology. It provides a visual representation of nystagmus, which can aid in accurate diagnosis and treatment planning.

Patient Experience

Electronystagmography (ENG): ENG involves the placement of electrodes around the eyes, which may cause mild discomfort or skin irritation for some patients. The test duration is typically longer due to electrode setup and calibration.
Videonystagmography (VNG): VNG is generally considered more comfortable for patients as it involves wearing goggles with built-in cameras. The setup time is typically shorter compared to ENG.


Electronystagmography (ENG): ENG is commonly used to evaluate vestibular and balance disorders, such as Meniere’s disease, benign paroxysmal positional vertigo (BPPV), and vestibular neuritis.
Videonystagmography (VNG): VNG is widely used for the assessment and diagnosis of various vestibular disorders, including BPPV, labyrinthitis, vestibular migraine, and central nervous system abnormalities.

Both ENG and VNG have their strengths and limitations, and the choice between them depends on the specific needs of the patient and the clinical context. Many healthcare providers have transitioned from ENG to VNG due to the advantages offered by video-based technology. However, ENG still holds value in certain situations and continues to be used in some clinical settings.

Portable Electronystagmography Solutions

In an increasingly mobile world, the need for portable medical devices has become paramount. Portable electronystagmography devices offer flexibility and ease of use, empowering medical professionals to perform ENG testing in various settings. Uncover the advantages and portability of these compact solutions, enabling healthcare providers to expand their reach and deliver quality care beyond traditional clinical environments.

At Medzell, a futuristic B2B platform for promoting Indian medical devices in emerging markets, we are committed to revolutionizing the healthcare industry. Contact us to explore our wide range of innovative medical solutions and join us in shaping the future of health.

Electronystagmography Devices (ENG) from Leading Indian Manufacturers 


Gladius ENGIntroducing Gladius, the PC-based ENG device manufactured by Recorders & Medicare Systems Pvt. Ltd. (RMS India). This well-designed device offers both 2 and 4 channel ENG system models, providing a comprehensive solution for assessing abnormal eye movements, including Saccades, Gaze, Pursuit, Positional, Dix Hallpike, Caloric, and Optokinetic tests.

The Gladius ENG system stands out with its customizable features, allowing it to be tailored according to industry norms and specific requirements. Each ENG machine undergoes rigorous quality checks on multiple parameters before dispatch, ensuring reliability and accuracy.

With the Gladius ENG system, medical professionals can benefit from advanced functionalities such as reformatting of sensitivity and filters during review and analysis. This feature enables optimal visualization and interpretation of test results, enhancing diagnostic precision. The system also includes a notch filter and data validation mechanism to ensure data accuracy and reliability.

To maintain a well-documented patient history, Gladius chronologically documents patient information, facilitating easy access to past test results for comprehensive analysis and treatment planning.

The 4 channel model of Gladius offers additional cutting-edge features. It includes automatic calculation of culmination frequency with a manual override, allowing precise frequency determination. The system also provides automatic plotting of Butterfly Charts, offering a visual representation of eye movement abnormalities. Furthermore, it enables auto calculation of slow phase velocity, assisting in the assessment of eye movement characteristics.

For comprehensive assessment of inner ear function, the 4 channel model of Gladius offers auto derivation of canal paresis and directional preponderance. These calculations provide valuable insights into vestibular disorders, aiding in accurate diagnosis and treatment decisions.

Gladius devices by Recorders & Medicare Pvt Ltd offer not only advanced features but also come at a reasonable price, ensuring accessibility to healthcare facilities with varying budgets. Trust Gladius to deliver exceptional ENG testing capabilities, enabling accurate diagnosis and improved patient care.


Electronystagmography devices (ENG) play a crucial role in the accurate diagnosis and treatment of vestibular disorders. These advanced devices utilize sophisticated technology to monitor eye movements and provide valuable insights into balance and eye movement abnormalities. ENG testing aids in diagnosing a wide range of conditions, including neurological disorders and vertigo, enabling medical professionals to make informed treatment decisions.

Gladius, a PC-based ENG system by Recorders & Medicare Systems Pvt. Ltd. (RMS India), exemplifies the excellence and reliability of ENG devices. It offers customizable options, a wide range of tests, and features that facilitate efficient data analysis. Gladius is a cost-effective solution, meeting industry standards and ensuring reliable diagnostic outcomes.

In the ever-evolving field of medical diagnostics, electronystagmography devices continue to advance, empowering healthcare professionals with valuable tools for accurate diagnosis and targeted treatment. As technology progresses, these devices will undoubtedly play an increasingly vital role in improving patient outcomes and revolutionizing the field of vestibular disorders.

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