Virtual SVV Subjective visual vertical

Subjective visual vertical

Virtual SVV Subjective visual vertical

Subjective visual vertical

Superior diagnostic sensitivity

The Subjective Visual Vertical represents a method to test an individual’s ability to adjust a vertical line to be parallel with gravity in the absence of any other visual cues. The Virtual SVVTM goggle provides a light-tight and comfortable solution with an easy to see luminous target inside.
  • Subjective measures with quantitative data analysis
  • Compact device for behavioral evaluation of vestibular and otoneurologic function
  • Effective tool for monitoring compensation over time
  • Sensitive to tilt at different head positions
  • Game-like procedure makes it fun for children
The Virtual SVV™
The Virtual SVV™ software

Base station and software

The base station is connected to a standard USB port on the Windows PC. The base station communicates with the virtual reality goggle via via a wireless receiver and transfers the measurement data to the software.

The Virtual SVVTM software provides the operator with a comprehensive online real-time display for the monitoring of the patient’s head position and angle of the luminous line while the patient is performing the task. Throughout the test procedure the deviation of the luminous line from the true vertical is displayed. Each SVV estimate confirmed by the patient is entered on a chart against the expected threshold range. Upon completion of the examination all data are stored and a report sheet is generated that can be output in PDF or hardcopy form.

Virtual reality goggle and handheld remote

The lightweight, light-occluding virtual reality goggle provides the patient with a display of the luminous line, which can be rotated using the buttons on the wireless handheld remote. Integrated into the goggle is a sensor that provides continuous information on the head position.

Exchangeable foam face cushions allow for form fitting to each individual’s face, ensuring the occlusion of any ambient light during the examination.

The rechargeable battery provides for operation over several hours. It is automatically recharged when placed in the cradle of the base station.

Functional testing of the utricles

The Virtual SVVTM aids in the diagnosis and rehabilitation of vestibular dysfunction. It provides a simple technique for assessing the function of the utricle. It’s suitable for kids, providing a game-like experience that makes it easier to get good corporation between clinician and patient.

An individual with a healthy otolith system can easily determine what is vertical with great precision. The estimation of the subjective visual vertical thus serves as a behavioral evaluation of utriclular function. Clinical research has already demonstrated that isolated utricular dysfunction can occur.

Virtual SVVTM complements the traditional vestibular assessment battery, allowing you to now accurately test all 10 balance organs in every patient.

Static tilt upright

Static testing performed with the head in an upright position provides the examiner with more precision than the traditional SVV bucket test.

In the presence of an otolith disorder the patient is likely to experience a sensation of tilt and accordingly, will set the luminous line with some deviation relative to head axis, i.e. relative to gravity.

Static tilt angles

Unlike the traditional SVV bucket test, the head sensor in the Virtual SVVTM goggle allows for additional testing to be conducted at multiple static tilt head positions for a more comprehensive evaluation.
The game like nature of the test is intuitive for children. Children love wearing the goggle and using the joystick, makes it more appealing than the bucket test. Very user friendly and easier for children to understand the goal of the test. Overcomes the ability of the bucket to take into consideration head position. A great tool, particularly as the role of SVV in the clinical evaluation is expanding. Excellent tool for behaviorally assessing the impact of vestibular end-organ (utricular) function. May better estimate the functional impact of vestibular end-organ (utricular) function.
- Otolaryngologist Hospital for Sick Children Toronto, ON. Dr. Sharon Cushing
The game-like nature of the test procedure allows for a behavioral measure of vestibular end-organ function in pediatric patients.
The goggles are fitted with movement sensors to allow for SVV testing to be performed at multiple static tilt angles.

Interacoustics Academy

Access educational topics that enhance your knowledge and improve your clinical efficiency.

Please note for this prouct:
Some features may not be available for all countries or all areas and product specifications are subject to change without prior notification. Please contact us to find out more.
Operating system Windows®7, Windows® 8.1 or Windows® 10 (x86/x64)

Contact us

45-6371-3555

We are social

facebook

Visit our channel

YouTube

Find ways to buy our products: Visit an Interacoustics sales office, call 45-6371-3555, or find a distributor.

Copyright © 2017 Interacoustics A/S. All rights reserved.