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MED4 chair (VNG option)

MED4 chair (VNG option)

Synapsys has designed the MED4 chair for an ENT practice as to complet the VNG tests with the kinetic rotational test

It enables to calculate :
- The vestibular gain
- The phase
- The symmetry
- The time constants
It offers a large range of kinetic tests:
- Various sinusoidal tests (SHA profiles, decreasing sinus
- Multi-frequencies (sweep)
- Multi-turn (step velocity)
- Sudden stop stimulations (square back and forth)

Its ergonomics ensures the patient’s comfort and security when carrying out middle frequencies tests.


The MED4 enables the patient to be in different positions and thus can be used for several vestibular tests complementary to the kinetic test.


- Safety harness


The MED4 can be controlled by VNG software or used manually.


- Class IIa accessory to the Synapsys VNG medical device
- Electrical device Class II Type BF
- IEC 60601-1, IEC 60601-1-2 (EMC)


- EC Conformity
- FDA approved


VHIT Ulmer (high frequencies test)


1 USB port available


Control Manual or automatic
Available predefined profiles: Sinus (Burst, SHA, multi-frequency sweep)
Step test
Available results Graphics (head movement velocity, slow phase cumulative, ocular position, Freyss diagram,
gain/phase/period graph)
VOR gain
Phase, Period
Directional Preponderance
Maximum slow phase velocity
Per- and post-rotator time constants
Values Maximum speed : 200°/s Maximum acceleration : 100°/s2
Electrical characteristics Power supply: 230 V 50 Hz / 120 V 60 HZ
Power consumption: 625 VA
Protection through a magnetic-thermal overall switch
Mechanical characteristics Pedestal weight: 99 kg
Saddlery weight: 42 kg (92.6 lb) (ref. SEM4 - waterproof covering – fireproof M1)
Maximum load (patient maximum weight):130 kg (286.6 lb)
Reclining positions from 0 degree (upright) to 80 degrees (flat)
Connection cable / computer allowing computer to control MED 4 chair functioning
Slip ring for video signal transmission during chair rotation


Additional equipments

- MED4 chair with adjustable headrest and footrest
- Motor barrel
- Emergency stop
- USB isolator cable PC - MED4
- Safety belt
- VNG Kinetic Module Licence
- VNS3x camera adapted to the chair
- Gbx acquisition box
- IFO switch

Downloadable documents

Additionnal equipments

VNG Ulmer (system) Synapsys

VNG Ulmer (system)

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