VNG / Balance

Interacoustics vHIT - EyeSeeCam

Features: ~~The EyeSeeCam vHIT provides quick and objective measurements of the vestibular-ocular reflex (VOR). A simple tool to assess the performance of all 6 semicircular canals. The results allow the healthcare professional to efficiently diagnose the “dizzy” patient and evaluate if the dizziness is related to a vestibular disorder.

Micromedical Visual Eyes 505 Binocular Video Frenzel System

Features include: Ability to display both eye and situation camera images on the screen, Recording indicator with elapsed time, Pre-labeled tests or create your own test names, Remote controlled video recording and fixation light with optional handheld remote, or goggle button. Video files are stored in AVI file format.

Micromedical VisualEyes™ 525 VNG

Touch the future
Videonystagmography provides ideal conditions for the observation, measurement and analysis of eye movements. It saves time, reduces costs and avoids the problems of myogenic and electrical noise.

Modern touch-enabled user interface – Navigate through software without the mouse – Shortest time from test to conclusion – Intuitive design – Record client’s comments and case history – Capture positional maneuvers with sound –
Playback in slow motion or frame by frame – Crosshairs displayed during playback – Time line scrolls to show location in raw data – Videos are stored in a easily accessible folder

Micromedical Rotational Chair – System 2000 Reclining

The System 2000 Reclining Rotational Vestibular Chair can measure Vestibular-Ocular Reflex (VOR) from 0.01 to 0.64 Hz at velocities up to 200 degrees/second. The clinician can perform Visual Vestibulo-ocular Reflex (VVOR), Visual Fixation (VFX), and Velocity Step tests in addition to the standard ocular-motor testing. When reclined, the clinician can perform the Dix-Hallpike and Positional tests with the added benefit of completing caloric testing.

Micromedical Rotational Chair – System 2000

The System 2000 Rotational Vestibular Chair can measure Vestibular-Ocular Reflex (VOR)from 0.01 to 1.28 Hz at velocities up to 300 degrees/second. With the System 2000 chair, a clinician is able to perform Visual Vestibulo-ocular Reflex (VVOR), Visual Fixation (VFX), Optokinetic After Nystagmus (OKAN), Velocity Step and Subjective Visual Vertical tests in addition to the standard ocular-motor testing.​

The Micromedical Orion Rotary Chair

The Micromedical Orion Rotary Chair provides clinicians with the unique opportunity to accurately assess the Vestibular Ocular Reflex (VOR) efficiently and economically.

• VOR 0.01 to 0.64 Hz (20 d/s to 100 d/s)
• Visual VOR
• VOR Suppression
• Velocity Step Test (50 d/s to 200 d/s)

The Micromedical Air Fx

The Micromedical Air Fx caloric irrigator has many benefits. It offers an otoscopic handle with illumination as well as magnification. In addition, irrigations can be started using the start button on the handle or via the Interacoustics VNG software.

• Cooling and heating ability: 20°C to 50°C
• Illuminated and magnified otoscope
• Self-contained cooling ability
• Integrated with the Interacoustics VNG software

The Micromedical Aqua Stim

The Micromedical Aqua Stim offers reliable caloric irrigation. Can be used as a stand-alone device, or from the VNG software. Irrigation is started by simply pressing the start button on the handle one time to initiate the user-defined caloric protocol.

• 30°C cold and 44°C warm irrigations
• Use with the Interacoustics VNG software or as stand-alone
• LED illumination and start button in handle
• Eliminates the need for drain and faucet in examination room

Bertec’s Computerized Dynamic Posturography (CDP/IVR)

Bertec’s Computerized Dynamic Posturography (CDP/IVR) combines immersive virtual environments with dual-balance force plate technology. The advancements in Bertec’s technology increase the clinical value of CDP in both assessment and targeted therapy interventions, especially for patients suffering from dizziness, balance problems and/or motion sensitivity. Training with immersive, virtual stimuli can increase patient motivation, adaptability and variability—all factors that positively affect patient outcomes.

• Next generation CDP
• Immersive virtual reality training
• Expanded assessment and treatment protocols
• Enhanced visual stimulus
• Low profile for easy access
• Touch screen display and remote control

Bertec Cobalt

Bertec Cobalt is a balance test for athletes. COBALT can be used as part of a concussion screening and management program by providing an objective measure of balance control when relying on visual, somatosensory and vestibular demands. The patented COBALT protocol includes a unique set of testing conditions that places high demands on the visual and vestibular systems that traditional static balance testing does not provide. Research shows these more difficult conditions yield sensitivity in identifying individuals with suspected concussion.

• Brief Screening Tests for athletes
• Challenging but achievable
• Provides objective data about balance using accurate measurements with a dual-balance force plate
• Objective postural sway data combined with simplified scoring system
• Standardized test conditions, including head turn and visual sensitivity
• Fully portable

The Bertec Portable Essential

The Bertec Portable Essential provides a variety of assessments, including standard static balance tests, weight shifting, and optional higher-level balance testing for athletes (COBALT). Static balance and weight shifting activities can be easily integrated into a customized therapy program.

• High-sensitivity dual-balance force plate
• Objective assessment of balance with normative data for comparison
• Convenient for clinical rehabilitation, home health, bedside, and community health programs
• Portable to bring balance services beyond clinic walls
• Training menus for use with biofeedback rehabilitation
• Low profile and light weight

The Bertec Portable Functional

The Bertec Portable Functional is a longer yet portable and highly sensitive balance force plate designed as a walkway for mobility assessment and training. The longer force plate allows the clinician to assess and train the patient on tasks that mimic daily walking, stair-stepping, and sit-to-stand activities.

• Objective assessment of functional movements
• Integrated high sensitivity dual-balance force plates
• Expanded assessment and treatment protocols
• Normative data ensuring evidence-based practice
• Low profile and light weight
• Functional training with biofeedback

The Bertec Prime IVR

The Bertec Prime IVR adds Immersive Virtual Reality (IVR) to enhance clinical balance assessment and training. The immersive screen used in the Bertec Computerized Dynamic Posturography (CDP/IVR™) system is combined with a fixed dual-balance force plate. This unique product combines the flexibility of a small, force plate with the power of IVR training scenes. The Bertec Prime IVR includes a suite of assessments as well as training options to provide targeted and customized therapy depending on the needs of the patient.

• Immersive virtual reality training
• Enhanced visual stimulus
• New training technology combined with established balance assessments
• High-sensitivity dual-balance force plate
• Low profile for easy access
• Upgradable to CDP/IVR

The Bertec Vision Advantage

The Bertec Vision Advantage (BVA) identifies dysfunction in the vestibular ocular reflex (VOR) per the Dynamic Visual Acuity Test. The BVA provides a more objective test than the standard clinical DVA test using an eye chart. The BVA also includes a Gaze Stability Test that identifies when the VOR falls below normal limits and whether there is an asymmetry between the left and right side. These advanced capabilities allow the clinician to customize treatment to the patient, resulting in optimal patient outcomes.

• Wireless and light weight head tracker
• Next generation VOR assessments
• Patient specific baseline comparison
• Automatic sensor calibration
• New technology allows for unrestrictive patient movements and more flexibility for clinicians
• Optimal patient outcomes

The Bertec Vision Trainer

The Bertec Vision Trainer (BVT) offers performance testing and training programs to quantify reaction times, eye-hand coordination, and visual memory.

• Improve visual-motor performance
• Achieve peak performance in fast-paced competitive environment
• Provide a unique modality for training during injury recovery
• Increase user motivation and participation

Get In Touch

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Contact Info

Our Offices

Minneapolis: 12302 Princeton Avenue Savage, MN 55378
Omaha: 3611 South 149th Street Omaha, NE 68144


Open Office Hours

M-F: 8am - 5pm
S-S: Closed


Contact Us

Minneapolis Offices:
(800) 328-6709 or (952) 808-0320
Omaha Offices:
(800) 899-7866 or (402) 572-7866

COVID-19 Update

We are monitoring the situation and development of the coronavirus outbreak closely. Currently this means that Midwest Special Instruments has setup procedures for operating our business and at the same time minimizing infection and spreading of the coronavirus. MSI’s guidance to team members is aligned with the guidance of local and national health authorities; in some cases, we are even more cautious. We constantly update our policy to reflect any changes in guidance from authorities.

Our first priority is everyone’s health. We are doing our best to ensure our service is maintained as much as possible given the circumstances. We are taking all possible actions to ensure reliable service and deliveries. As of now, there is no slowdown in order fulfilment or device repair and calibration services.

We greatly appreciate your loyalty to Midwest Special Instruments. We are keenly aware that this outbreak affects not only your business with MSI but your daily life and that of your family, customers and staff.  Please stay safe and know that our thoughts are with you during this difficult time.