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Smart Notes

These application notes can be used as a quick guide to perform specific tasks while using IHS hardware and software.

Visual Evoked Potentials using SmartEP

Visual Evoked Potentials are responses from the cerebral cortex elicited by visual stimulation. These responses are evoked using visual patterns on a light array covering a particular area of the field of view, and are acquired using surface electrodes from the patient’s scalp. VEP testing can help provide information about conditions such as opticneuritis, optic tumors, retinal disorders, and demyelinating diseases. This Smart Note describes suggested electrode placement, acquisition parameters,… Read More »Visual Evoked Potentials using SmartEP

Notched Noise masking using SmartEP

Notched noise masking is an ipsilateral masking noise with special characteristics, more specifically, a gap in the frequency spectrum, usually corresponding to the same frequency as the stimulus. This type of noise can help isolate frequency regions in the cochlea and aid in evaluating acoustic nerve function. This Smart Note covers topics such as suggested electrode placement, stimulus and acquisition setup parameters, and analysis. Notched noise masking is available as… Read More »Notched Noise masking using SmartEP

Acquiring a Cochlear Implant eABR using SmartEP

After fitting a patient with a new Cochlear Implant, it is necessary to obtain an objective measure of the auditory capabilities provided by the implant. An eABR measurement will provide information about adjustments to the implant, needed to bring the patient’s hearing to the expected level. This Smart Note outlines the general steps to take then and electrical auditory brainstem response for implanted patients as it related to SmartEP. Consult… Read More »Acquiring a Cochlear Implant eABR using SmartEP

Guidelines for System Administrators

  • General

This Smart Note outlines the basic considerations that system administrators and IT personnel must keep in mind for computers that use the IHS applications. These include the requirements and considerations for administrative access for specific folders, location of patient data, identification of files that contain PHI, Encryption, and Antivirus.

Acquiring Vestibular Evoked Myogenic Potentials using SmartEP

Vestibular evoked myogenic potentials (VEMPs) are short-latency electromyograms (EMGs) recorded via surface electrodes from muscles in the neck or below the eye, in response to acoustic stimuli presented at relatively high levels. VEMP testing for normal saccular/IVN function, when combined with the right battery of tests, can provide valuable diagnostic information about conditions such as Meniere’s disease, vestibular labyrinthitis, Tullio phenomenon, and more. This Smart Note describes suggested electrode placement,… Read More »Acquiring Vestibular Evoked Myogenic Potentials using SmartEP

Acquiring P300 and MMN using SmartEP

P300 and Mismatched Negativity responses may be used to obtain very useful information about neuro-degenerative and neuro-pathological changes, especially in the language and information processing areas of the brain. These techniques are especially helpful to test patients with aphasia, dyslexia, Parkinson’s disease, Alzheimer’s disease and other attention problems. This Smart Note describes suggested electrode placement, acquisition parameters, eye-blink artifact rejection, and analysis methods, for use with SmartEP in the Duet and USB hardware platforms.

Acquiring Late Latency Responses using SmartEP

Late Latency Responses, also known as ALR, are components of the auditory evoked potential response. The LLR response is found between 50 and 250 milliseconds from the time of stimulation, and appear to reflect the response of the auditory cortex. LLR testing can help determine the amount and type of hearing loss at specific frequencies, as well as provide information about the presence of nervous system abnormalities, particularly referring to… Read More »Acquiring Late Latency Responses using SmartEP

Acquiring a 40 Hz response using SmartEP

The 40 Hz response is an event related evoked potential similar to middle latency responses. It is usually considered to be a steady state response due to its periodic repetition. Although its use is still in question, it has been speculated that the response originates within the polysensory areas of the thalamus and/or in the auditory cortex. This Smart Note describes suggested electrode placement, acquisition parameters, and analysis methods, for… Read More »Acquiring a 40 Hz response using SmartEP

Acquiring Middle Latency Responses using SmartEP

Middle Latency Responses, also known as MLR, AMR or AMLR, are components of the auditory evoked potential response. The MLR response is found between twelve and fifty milliseconds from the time of stimulation, after the ABR; this period reflects the response of the auditory cortex. MLR waveforms can be acquired with the use of click or pure tone stimulation. This Smart Note describes suggested electrode placement, acquisition parameters, and analysis… Read More »Acquiring Middle Latency Responses using SmartEP

Acquiring Electrocochleography responses using SmartEP

Electrocochleography may be used to diagnose some vestibular and auditory conditions, such as Meniere’s disease or perilymphatic fistula. This Smart Note describes the methodology for acquiring ECochG responses, including the different types of electrodes that can be used, suggested acquisition settings, and instructions on obtaining the SP/AP ratio as well as the area ratio. ECochG can be acquired by using the Duet and USB platforms. The USBLite and Solo platforms… Read More »Acquiring Electrocochleography responses using SmartEP