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Smart Notes

Loopback self-test procedure for all hardware platforms

The Loopback self-test procedure can be used to evaluate the performance of all hardware platforms for systems that include the SmartEP program. By connecting the sound output of the unit to the signal input of the amplifier, it is possible to assess the proper operation of most of the components. Note that this test does not evaluate the transducers, electrode leads, and electrodes; as these will be disconnected during the… Read More »Loopback self-test procedure for all hardware platforms

Continuous Loop Averaging Deconvolution in SmartEP

Continuous Loop Averaging Deconvolution is a methodology allows the acquisition of auditory evoked responses at very high stimulation rates. CLAD algorithms use arbitrary stimulus sequences to acquire averaged responses that can later be deconvolved into recognizable evoked responses. The following Smart Note covers some suggestions for test settings for acquiring using CLAD techniques, when using the SmartEP software. CLAD can be used with the Duet and USB hardware platforms.

Acquiring Electroneuronography responses using SmartEP

Electroneuronography (eNoG) are used to evaluate and measure the integrity of the facial nerve. By comparing the responses from each side of the face, it is possible to determine the amount of degeneration and the best course of action for treatment. The Somatosensory modality, used to acquire eNoG responses, is available to SmartEP on the USB hardware platform.

Acquiring Somatosensory Evoked Responses with SmartEP

Somatosensory responses can be acquired by providing surface electrical stimulation to a patient’s upper or lower limbs. This procedure is useful to determine the integrity of the somatosensory pathways as well as help diagnose the nature of any possible sensory impairment. The Somatosensory modality is available to SmartEP on the USB hardware platform.

Using the SmartEP Advanced Auditory Research Module

The SmartEP AAR addon module allows the user to fully define the timeline of events in regard to stimulation and acquisition; from mixing two stimuli in one ear, to inserting offsets in the presentation or acquisition. This Smart Note covers some basic concepts to help with understanding on how to use this module. AAR is commonly used to acquire complex ABR (cABR), frequency-following responses (FFR), Auditory Change Complex (ACC), and… Read More »Using the SmartEP Advanced Auditory Research Module

Chained Stimuli ABR using SmartEP

Chained Stimuli is a method of acquiring AEP responses at multiple intensities in a concurrent manner. When stimulating using this method, the different stimulus intensities are presented either in a sequence or randomly. The method is useful when running a threshold search. This Smart Note includes information about electrode placement, acquisition parameters, and peak markings. This guidance applies for the Duet, USB, USBLite, and Solo hardware platforms.

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