EvokeDx®
Visual Electrophysiology System
icVEP, VEP, pERG
Visual electrophysiology is an objective, non-invasive method of assessing function in various mechanisms of the entire visual pathway.
Designed for a broad range of visual function assessments, EvokeDx uses conventional as well as novel, proprietary stimuli to illicit responses from discrete sub-divisions of neural visual pathways.
Clinical Applications
Glaucoma
Central Vision Function
EvokeDx is not cleared in the USA for the specific diagnosis of any condition
Clinical Benefits
Objective, non-invasive testing of the entire visual pathway
Regulatory
FDA 510(k) Cleared | CPT Code 95930
Health Canada Licensed
CE Marked
EvokeDx Clinical Benefits
Visual Evoked Potentials (VEP) provide objective, quantitative information about central vision function in a non-invasive manner. This is new information that is complementary to the structural analysis obtained from technologies such as OCT and Fundus photography and augments subjective information from standard visual acuity and perimetry.
Electroretinograms (ERG) reflect the integrity of the optics, photoreceptors, bipolar cells, and retinal ganglion cells. Clinically, ERGs may be useful when patients have abnormal VEPs to differentiate between retinal dysfunction occurring in the optic nerve, optic radiations, and occipital cortex.
EvokeDx NextGen icVEP | VEP | ERG
EvokeDx® is the next generation icVEP + VEP + ERG device developed by Konan Medical and leading scientists in visual electrophysiology. Its compact, all-in-one form factor features numerous market-leading technologies including intuitive touch-screen user interface, Organic LED stimulus display, infrared gaze and attention monitoring, dual-channel amplifier, and powerful Fourier (Frequency domain) analytics with intuitive reporting. EvokeDx is a fresh approach to visual electrophysiology.
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Operator Aspect
The Operator side of EvokeDx features an intuitive, touch-screen enabled user experience graphically guiding the operator easily through the test sequence:
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Patient add | select
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Test select
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Patient alignment
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Testing
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Results / analytics
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Preferences / settings
Analytics instantly displays test results and Fourier analytics. One-touch help screens provide context-sensitive explanations of all analytic components for all tests. A robust comparison feature allows instant comparisons. For example:
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Compare right and left eyes on the same day
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Compare the same eye from a prior exam to assess progression
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Compare how a bright response compares to a dark response, the same pattern
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Compare how a small check response compares to a large check response
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Compare how one patient compares to another patient of known characteristics
Patient Aspect
The Operator side of EvokeDx features an intuitive, touch-screen enabled user experience graphically guiding the operator easily through the test sequence:
-
Patient add | select
-
Test select
-
Patient alignment
-
Testing
-
Results / analytics
-
Preferences / settings
Analytics instantly displays test results and Fourier analytics. One-touch help screens provide context-sensitive explanations of all analytic components for all tests. A robust comparison feature allows instant comparisons. For example:
-
Compare right and left eyes on the same day
-
Compare the same eye from a prior exam to assess progression
-
Compare how a bright response compares to a dark response, the same pattern
-
Compare how a small check response compares to a large check response
-
Compare how one patient compares to another patient of known characteristics
Key Features - the Top 12
EvokeDx is feature-rich … see Specs | FAQ section for further in-depth product features
Fourier Analytics
Discrete Fourier analysis is used to decompose the complex and repetitive time-based waveform into a spectrum of sinusoidal functions, “frequency components”, each quantified by an amplitude and phase value to be used with a series of Fourier statistical tools.
Patented icVEP Tests
Konan’s patented Isolated Check VEP (icVEP™) is a low-contrast, high temporal frequency, sinusoidally modulated stimulus thought to target the magnocellular pathway.
Very Short Run Testing
EvokeDx features a novel test administration method, “Very Short Runs”, typically 2 to 6 seconds each, enabling easier patient compliance, better staff satisfaction, and ultimately mathematically advantaged in the signal averaging process.
Test Library - 16 strategies
The EvokeDx test library includes both novel and ISCEV standard visual electrophysiology systems. Grouped by icVEP, VEP, and ERG strategies, simply select the test, the eye(s) being tested, and whether recorded with one or two channels.
Low-cost, Non-Proprietary Electrodes
EvokeDx electrode leads feature standard snap connectors to allow the utilization of high-quality, non-proprietary EEG electrodes that cost significantly less than the proprietary electrodes offered by other vendors.
Contact Konan Medical for a review of how substantial this cost savings really is in your practice.
Clinical Evidence
SBIR Glaucoma investigation reported 94% and 92% accuracy respectively in separating glaucomatous from non-glaucoma patients using the patented icVEP protocol. Independent assessments in June 2013 at two sites in Beijing (TongRen and YouYi) report equivalent findings using icVEP.
Linearized OLED Monitor
Off-the-shelf LCD monitors used by some other companies introduce an undesirable luminance artifact that may contaminate a transient response. Our linearized Organic Light Emitting Diode (OLED) monitor eliminates luminance artifacts while adding microsecond timing.
Integrated Gaze Monitor
EvokeDx utilizes an IR gaze monitor to assist in patient positioning and attention/fixation during the test. A graphical heat map provides the operator with real-time feedback on the monitor while the test is being conducted.
Pediatric Tests
Kid-friendly, video animations are one-touch available to capture the child’s attention and test immediately with our novel “Very Short Run” strategy. This simplifies the lack of attention problems encountered with extended test sequences and re-tests from attention lapses.
Remote Training & Support
Konan products feature “KonanCare”, an integrated remote support tool, to enable secure, permission-based, real-time, onboard training and technical support. Yet another cutting-edge feature designed to enhance support and training while reducing costs and downtime.
Luminance Calibration
A fast and simple luminance calibration feature is included to periodically verify monitor luminance output critical for precision testing. Systems are individually calibrated at manufacture, but all monitors change luminance characteristics over time. We make it easy to maintain optimum performance.
No "IRQ" Synchronization
Our scientists have incorporated a low-latency technique to synchronize data collection as opposed to video-card-based “IRQ” methods. Synchronous data is designed to avoid errors from side-lobe leakage. Automated artifact rejection also simplifies high-quality data collection.
Software User Interface
Highly illustrated, context-sensitive user experience
Having incorporated VEP and ERG into my practice more than 5 years ago, I am convinced daily of the clinical benefits of assessing glaucoma, retina, and many neuro-affected conditions.
After switching from an earlier generation product, I am more confident with the test strategies, short-run testing, Fourier frequency domain analytics, and ultimately improved clinical decisions (plus my techs will never go back to the old system!).
Craig Thomas, OD
First Eye Care Dallas