Product Images

Click on a thumbnail to see a larger version of the image.

Details

Accessories

• (1) Western Systems Research ENG & VAT
• Case
• Power Cords
• Manuals
• HP Notebook
• Deskjet Printer
• VAT & ENG Software
• Laser Tracker
• Optokinetic Stimulator

Description

On Site Financing Available!!

Vestibular Autorotation Test VAT was developed as a method of evaluating the vestibulo-ocular reflex (VOR) .

Diagnostic Information

For most of the population, balance control occurs at an unconscious level. Signals from the inner ear continuously drive the eye muscles to coordinate eye movement with head movement. This coordination is necessary to have clear vision and balance. The communication between the ear and the eye is called the vestibulo-ocular reflex (VOR). When the VOR is functioning properly, eye speed and timing are equal and opposite to those of the head. But, if the speed or timing is off, even slightly, vision is distorted because of apparent motion of the visual field.

The VAT is an 18 second test of the high frequency horizontal and vertical VOR’s for diagnosis, treatment planning and monitoring of vestibular disease. The frequency tested ( 2 - 6 Hz) closely approximates normal head movements. For example, many patients complain of dizziness or loss of balance when they are walking, bending over or turning their head quickly. The VAT® quickly and comfortably monitors a patient’s head and eye motions to record what is happening in the vestibular portion of the inner ear.

Testing with the VAT often identifies problems not found with other vestibular tests, because the VAT tests natural, faster motions and unlike other conventional vestibular tests, evaluates both the horizontal and vertical canals. Because the VAT is sensitive to changes of the VOR and is easy to perform, it is often the first screening test a patient receives who complain of dizziness or balance problems. Patients do not object to repeated testing which makes the VAT® the ideal test to monitor ototoxic medication and vestibular rehabilitation.

The data shown below illustrates the VAT test results from a gentamicin ototoxicity patient. The normative data is shown as the blue error bars ( ± 2 std.) Individual patient VAT data are shown in various colors. Notice that both the horizontal and vertical gains (top two graphs) are well below the normal data. The horizontal and vertical phases ( bottom two graphs) are above the normal data. This data pattern is typically seen in gentamicin ototoxicity.

ENG Test Battery includes:

Oculomotor Screening

• Saccadic Evaluation
• Smooth Pursuit Tracking
• Optokinetic Testing
• Gaze Testing

Positional and Positioning

• 6 Static Positions
• 3 Dynamic Positions
• 1 USER CHOICE Position

Caloric Testing

• Reduced Vestibular Response
• Directional Preponderance
• Fixation Suppression

---------------------------------------------------------------

Basic Description

• Fast-Only 18 seconds!
• Physiological — Screens VOR function.
• Tests Horizontal & Vertical Canals.
• Test the Motion Range from 2 – 6 Hz.
• Natural Everyday Motions.
• The motions your patients complain about.
• Easy to Perform.
• Great for all Ages Pediatric or Adults.
• Provides Diagnostic Information.
• Monitors VOR Systems.
• Monitors Smooth Pursuit System.
• Monitors Vestibular Rehabilitation
• Objective Documentation.
• Headband/Skin slippage software.
• Built-in algorithms eliminate data error.
• Visual Vergence system correction.
• Each data point corrected for eye to target distance.
• Artifact Detector.
• Eye blinks automatically removed.
• Microchip Rotational Sensors
• Senses Horizontal or vertical head motion.
• Helps you to Design a Treatment Plan
• Specific to your patient’s needs.
• Windows Compatible — ME, 2000 or XP.
• Use the computer of your choice.
• Notebook or desktop, serial port or USB.

VAT Is Your Choice For:

• VOR Screening 
• Diagnostic Information 
• Monitor Vestibular Rehabilitation
• Design a Treatment Plan 
• Monitor Ototoxic Medication
• Pediatric Screening
• Sports Medicine
• Objective Documentation