• Audera Pro Clinical Evoked Potentials and OAE system from Grason-Stadler

    AUDERA PRO

    CLINICAL EP/OAE
  • Novus AABR newborn hearing screener from Grason-Stadler

    NOVUS

    NEWBORN AABR SCREENER
  • Audera Evoked Potentials system from Grason-Stadler

    AUDERA

    EVOKED POTENTIALS SYSTEM

EVOKED POTENTIALS

Evoked potential (EP) instruments measure neural synchrony in response to auditory stimuli. In other words, auditory EP tests measure the brain’s response to sound. Auditory EPs can be measured along the entire length of the auditory pathway, from the cochlea to the auditory cortex.

There are several Auditory Evoked Potentials that are used to determine the neural integrity of the auditory system. The clinician defines parameters to isolate the target EP and evaluates the latency and amplitude of the response to make diagnoses and recommendations.

EP testing devices can range from fully clinical to screening. Clinical EP instruments are the most comprehensive devices and include predefined test types, such as ECochG, ABR, MLR, LLR, P300, and ASSR, with the ability to customize collection parameters. Clinical EP instruments allow audiologists to determine neural synchrony and cortical function. Screening ABR devices are simple portable devices that use automated protocols and provide Pass or Refer results.

 

CURRENT GSI EVOKED POTENTIALS DEVICES

A clinician testing a patient with the Audera Pro

AUDERA PRO | CLINICAL EP/OAE

The GSI Audera Pro™ is GSI’s clinical comprehensive EP system. The Audera Pro offers a full range of features, including a complete battery of test types covering evoked potentials (EP) and otoacoustic emissions (OAEs). The Audera Pro includes all the features and updates needed to support the needs of the modern audiology clinic or ENT practice. The Audera Pro provides user friendly software and generates quick and efficient quality data. The training resources provided by GSI and its distributors establish an immediate level of testing confidence in clinicians. Reporting is clear and concise, allowing test results to be easily organized, combined, and interpreted. Evoked potentials test types that are included on the system are ECochG, ABR, MLR, LLR, SN10, P300/MMN, ASSR, and eABR. Optional modality licenses may be purchased, allowing you to perform a combination of different tests: AEP, ASSR, DPOAE, and TEOAE.

 

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An infant being tested with the GSI Novus AABR screener

NOVUS | NEWBORN AABR SCREENER

The GSI Novus™ is a sleek, handheld, comprehensive newborn hearing screening instrument. The Novus features a touch screen display and intuitive software in a compact hardware design for ease of use. The Novus may be configured with any combination of AABR, TEOAE, and DPOAE, which allows for seamless two-stage infant screening. The Novus offers two methods for simultaneous AABR by using IP30 insert phones with ear tips or ear cups. Testing both ears at the same time offers significant time saving benefits and less disruption for the baby. A wireless charging dock is included with the Novus, so the device is always ready to be used. Screening tests can be completed any time the battery is low and is placed on the dock. A fully charged Novus can perform approximately 50 ABR or 150 OAE screening evaluations.

 

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Audera evoked potentials instrument from Grason-Stadler

AUDERA | EVOKED POTENTIALS SYSTEM

The GSI Audera™ meets all of your EP testing needs by providing a combination of Auditory Evoked Potentials (AEP) and Auditory Steady State Response (ASSR) tests. The ASSR test is an auditory EP elicited in response to an ongoing, modulated pure tone stimuli. ASSR can predict hearing sensitivity in patients of any age. The Audera comes standard with CE-Chirp and CE-Chirp Octave Band stimuli for frequency-specific threshold evaluations. Wave V generated by a CE-Chirp has been demonstrated to be 1.5 to 2 times larger in amplitude than Wave V generated by a Click. This results in faster test times with larger waveform amplitude and increased test confidence. Assess both cochlear and retro-cochlear function using the same instrument. With ASSR testing, it is possible to obtain frequency specific results and generate an estimated audiogram. Designed with the user in mind, these features have been refined with more than 10 years of clinical use, so you can be confident in the results.

 

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EVOKED POTENTIALS BASICS

Find more educational materials about evoked potentials by visiting GSI ADVANCE.

WHAT ARE EVOKED POTENTIALS (EP)?
Evoked potentials are electrophysiologic tests of the auditory system. In an evoked potential test, electrodes are placed on a patient’s head and an auditory stimulus is presented into the ear. Waveforms from the brain’s response to the stimuli are displayed using EP software and a clinician is able to interpret the results. Evoked potentials are made up of several individual tests such as ECochG, ABR, and ASSR, and each measure a different area of the auditory pathway.

WHAT IS CE-CHIRP?
CE-Chirp is a short duration stimulus that implements adjusted timing to elicit a large response for ABR and AABR testing. The timing adjustments stimulate the entire length of the cochlea at the same time which leads to a response that is up to 1.5 times larger than a traditional click stimulus. The benefit of CE-Chirp is shorter test times and increased confidence in interpretation.

WHAT DIFFERENTIATES AABR FROM STANDARD ABR?
Automated Auditory Brainstem Response (AABR) is used primarily for newborn hearing screening. This type of ABR is automatically analyzed and designed to generate a pass or refer result. Traditional Auditory Brainstem Response (ABR) testing consists of not only ABR testing, but a battery of other evaluations to diagnose hearing loss or other ear disorders. ABR testing is performed by an audiologist, who interprets the results manually and helps develop a treatment plan for the patient.

HOW IS EVOKED POTENTIALS TESTING APPLIED TO NEWBORN HEARING SCREENING?
The AABR protocol has been optimized for universal newborn hearing screening. The equipment is designed to be efficient and easy to use by giving the option to test both ears at the same time. Results are automatically generated as a pass or refer. Audiologists can easily interpret the results and act if necessary.