RETI-port gamma plus² *****

RETI-port gamma plus² + mfERG + mfVEP

  • Product Details

  • Ganzfeld Q450 SC

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Electrophysiological Test Unit
RETI-port gamma plus2
Pattern VEP + pattern ERG + flash VEP
ISCEV ERG, EOG fast and slow
mf ERG flash stimulation
mf VEP pattern stimulation

The RETI-port consists of the pattern stimulator unit and computer analyzer system. The bio signal amplifier includes a preamplifier near the patient. All patient data and the results are stored in the data base. The bio signal and averaged curves from all channels can be displayed on the monitor. In analysis mode, the system sets all markers and computes all parameters automatically.

The basic equipment already includes - in compliance with ISCEV Standard - simple and rapid determination of PVEP and PERG. The software provides automatic computation of the latencies and amplitudes.

IThe EOG program provides visualization of saccades and online analysis of amplitudes for right and left eye.

Fast Fourier transformation, OFF-line averaging, pre-trigger function are among the advanced features of the system.

Utilizing the unique short corrected m-sequence (patent registered) to generate a stimulus via a high class specially selected 21" custom monitor (60 Hz frame time ) on a 30 degree visual field, the state of the art RETI-port gamma plus offers an objective test of the patient's eyes to quantify the retinal response.

The stimulated areas respond in accordance with the special algorithm and deliver an individually reproducible ERGsignal for each segment (1 segment is 1 hexagon). Each cycle comprises a complete short length m-sequence and takes as little as 30 seconds for up to 61 stimulus segments and less than one minute for 103 segments. The final raw data result is derived from a freely selectable number of cycles by averaging. The artefact is detected within a selectable range and discarded automatically. A present-test run sequence may be interrupted for any reason, continued or the current cycle discarded. Additionally the RETI-port gamma plus offers the opportunity of linking to different Rodenstock scanning laser ophthalmoscopes (SLO), red stimulus or Heidelberg Retina Angiograph (HRA), blue and green stimulus, to simultaneously give a topographic and functional (electrophysiological) resultfor the visually controlled retinal area. Markers for a- and b-wave from the ERG graph are set automatically but may be set manually for each ERG to check the recorded amplitude and latency. The RETI-port gamma plus incorporates a highly sensitive four-channel amplifier with an outstanding signal-to-noise ratio. The instrument is useful for monitoring the disease process of the local retina and cortex. It is now also able to measure the visual cortex.


The RETI-port features in brief:

  • Supplied with standard ISCEV programs
  • User customized programs possible
  • Bio Signal and average result can displayed on the screen
  • Automatically artefact elimination
  • All amplifier data are software-controlled
  • Automated impedance test can start every time.
  • Easy graphical user interface with multiple independent windows
  • Offline averaging of single response
  • Multifocal analysis of each signal with N1, P1 marker, 2D, 3D groups and user groups
  • Many special mathematical features to calculate many different parameters,
  • FFT - fast Fourier transformation to analyze steady state results,
  • DSP - Digital Signal Processing filter
  • Data base with backup on CDRW
  • All data can export to EXCEL for statisticalö analysis
  • Local area network analysis possible
  • Compact interface technology in standard computers


Monitor stimulator unit :

  • High quality brand industrial PC-system
  • 19" TFT/ LCD monitor, luminance 80 cd/m²; high contrast
  • Pattern or strip position: full, half or quarter
  • Computer calculated the check size by input the angel in deg and minutes
  • Contrast controlled over the computer from 3% - 99%
  • Pattern reversal, appearance / disappearance
  • For work with children special pictures during the test


Operating unit:

  • Intel Core i5-650 / 3,2 GHz / 500 GB HDD / 2GB RA
  • DVDRW for backup the database
  • Analog-digital-converter KPCI 12 bit
  • Windows XP
  • Keyboard, mouse
  • 19” TFT monitor
  • Operating table



New version coming soon!

  • ISCEV Standard
  • Full field globe D=400 mm; dimension: 400 x 360 x 540 mm
  • Adjustable chin rest, head band integrated
  • All function full computer controlled, USB connection
  • USB camera internal
  • Trigger input (TTL)
  • 1x Fixation LED 0° / 2 x EOG-fixation LED +/- 15°,D
  • Intensities of LED’s adjusted to backlight
  • Integrated loud speaker to increase attention of the patient

Stimulus: white flash - standard intensity 3 cds/m²

Interval    -40 dB to +5 dB in steps of 5 dB

Stimulus: color flash  - standard flash 3 cds/m²

royal blue (455 nm)  interval -50 dB to -5 dB in steps of 5 dB
blue (470 nm) interval -45 dB to  0 dB in steps of 5 dB
green (525 nm)  interval -45 dB to  0 dB in steps of 5 dB
amber (590 nm) interval -45 dB to  0 dB in steps of 5 dB
red (625 nm) interval -45 dB to  0 dB in steps of 5 dB
   
  - Pulse-width modulation (max. flash length = 5 ms)
  - Extended flash duration, 1 ms to 500 ms in 1 ms steps

Stimulus ON-OFF – all colours: 1ms to 1000 ms adjustable in steps of 1 ms

Background luminance: adjustable in 1 cd/m² steps up to

White 1000 cd/m²
Royal blue (455 nm)  100 cd/m²
Blue (470 nm)   200 cd/m²
Red (625 nm)  200 cd/m²
Green (525 nm)  500 cd/m²
Amber (590 nm) 750 cd/m²
    
  Simultaneous use of colour LED’s to generate other background colour

Option X: (Q450SCX)

Xenon tube for white high flash

Intensity:

  • 9,5 cds/m² ( +5 dB)
  • 30 cds/m² (+10 dB)
  • 95 cds/m² (+15 dB)


Please note:  New version coming soon!

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