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The Integrity with VEMP provides testing that is intended to assist in the assessment of vestibular function. The target patient population ranges from school age children to geriatric adults who can complete the testing tasks. The Integrity with VEMP is intended to be used by a variety of professionals, such as clinical practitioners specialized in balance disorders, Audiologists, and Otolaryngologists (ENT doctors) with prior knowledge of the medical and scientific knowledge about the VEMP procedure.

VEMP (Vestibular Evoked Myogenic Potential) is a short latency response generated either from sternocleidomastoid muscle (cVEMP) or oblique muscle (oVEMP) which is typically evoked by high level acoustic or vibratory stimulation. VEMP is a non-invasive test that is used for diagnosis of vestibular disorders such as superior canal dehiscence, Menier's disease, vestibular neuritis, and, among others. VEMP test can be done in clinics (ENT/audiology) and hospitals provided that the users have adequate knowledge and background about underlying process of VEMP and recording auditory evoked responses. The Integrity V500 is indicated for auditory evoked potential testing. "Integrity with VEMP" (this submission) is the addition of the VEMP test modality to the Integrity V500. The Integrity V500 is an auditory evoked auditory system response and Integrity with VEMP is an auditory evoked vestibular system response. Since the vestibular system is connected to the auditory system, a loud stimulus to the auditory system also simultaneously stimulates the vestibular system. However, the evoked signals are measured at different electrode sites. It is important to note that the methods of stimulation and data acquisition are the same for the VEMP modality as for the ABR modality (one of the Integrity V500's auditory evoked testing modalities), with differences being in electrode montage and patient's physical state. As such, it is possible to also get a VEMP response while testing in the Integrity V500's ABR modality. Integrity with VEMP is a PC based device which uses the same hardware and similar software for evoking the stimulus, collecting the response, processing the data, and displaying the outcome on the screen as does the Integrity V500. The hardware used are: a VivoLink (patient interface device), air and bone conduction transducers (to stimulate the vestibular system), CV-Amp (bio-amplifier), and a computer. The response from the muscle is picked up by a bio-amplifier attached to the neck (for cVEMP) or under eyes (for oVEMP) and forehead with electrodes. The data is the VivoLink for pre-processing and then transferred to the PC via Bluetooth connection for full processing using the algorithm designed for VEMP processing. Through the test, the processed sweeps are filtered using the filter setting defined by the user and the averaged response is shown on the screen. The primary diagnostic component of a VEMP measurement is the comparison of the amplitude of the primary peak of the VEMP response between right and left sides, defined as an asymmetry ratio, where a significant amount of asymmetry is indicative of a vestibular disorder. The amplitude of the vestibular response peaks is also dependent on the contraction level of the muscles involved in the recording. To minimize the muscular response biasing the result, it is important to have equal contraction levels for both sides; this is especially physically challenging to generate equivalent neck contractions needed for cVEMP. To overcome this issue, two key features were added to the Integrity with VEMP compared to Integrity V500: a biofeedback EMG monitor (which displays real-time muscular activity) and VEMP response normalization (scaling based on muscular contraction levels). The EMG monitors can be used as a guidance to the clinicians and patients for the level of muscle contraction. Normalization automatically scales the recorded sweeps based on the energy of the corresponding EMG which helps to compensate for imbalance contraction from the two sides.