EP25 Full Clinical ABR

Clinical AEP software module
The EP25 module measures and analyses the
full range of auditory evoked potentials within a
980ms response window.It has the ability to synchronize with external
devices (e.g. cochlear implants) and is ideal
for clinics that encounter a wide range of
AEP-related pathologies.EP25 contains all the functionality of the EP15, but has additional built in tests for middle and late latency potentials (AMLR, ALR, MMN, P300) as well as ECochG and EABR.Emphasis in the EP25 is on flexibility. Users can design their own tests and exercise complete control over all parameters.
EP25 Features
User and Pre-Programmed protocols
Middle and Late latency Tests (MLR, LLR, MMN, P300)
ECochG markers and Rate Study
New patent pending stimuli CE-Chirp® and NB CE Chirp®
Latency Intensity Function
Bayesian Weighting
Quality Target Line (Fmp) and Residual Noise calculation
Split screen
Digital filtering


Standards IEC 60601-2-26 (Electroencephalographs).
IEC 60645-1/ANSI S3.6 (Audiometers).
IEC 60645-3 (Auditory test signals)
Pre-Amplifier Two channels (standard) EPA4 Cable Collector (4 electrodes). Standard 50 cm. Option: 5 cm or 290 cm
One Channel (optional) EPA3 Cable Collector (3 electrodes). 50 cm
Gain: 80 dB/60 dB
Frequency response: 0,5 – 5000 Hz
Noise: 4nV/√Hz – 0.22 μV RMS (0 – 3 kHz)
0.22 μV RMS (0 – 3 kHz)
CMR Ratio: Minimum > 118 dB. Typical 130 dB <100 Hz
Radio Frequency Immunity: Typically 25 dB improvement over previous available designs
Max input offset voltage: 2,5 V
Input impedance: 10 MΩ
Power: From main unit
Impedance check 30Hz rectangle. Impedance information for each individual electrode.
No unplugging of electrode leads required. Readout directly on Amplifier.
Measuring Current: 25uA. Ranges: 0.5kΩ -25kΩ.
Frequency specific stimuli Tone burst: Frequencies: .5kHz to 4kHz.
Envelopes: Blackman, Gaussian, Hanning, Hamming, Bartlett, Rectangle, and manual rise/plateau/fall.
NB CE-Chirps®: 500Hz, 1kHz, 2kHz and 4kHz. Bandwidth +/- ½ octave
Broad Band Stimuli CE-Chirp® with cochlear delay compensation.
Rate: 0.1 – 80.1 per sec.
Intensities 20 – 130dB peSPL in 1dB steps (0 – 100dB nHL in 1 dB steps)
Masking White noise. 0 – -40dB relative to stimulus.
Weighting Bayesian.
Quality Indication Response Confi dence Targets of 95%, 97,5% or 99%.
Fmp calculation based on 5 points with selectable range.
Residual Noise calculation On-line during measurement. Selectable stop criteria. 5 points calculation with selectable range.
Number of channels 2 channels. (EPA3: 1 channel).
Number of curves per session Unlimited.
Auto protocols Several automatic test protocols included. As many automatic tests as desired may be designed and added by operator. Manual control during automatic testing is available.
Data acquisition Analysis time: 0-980ms window. Acquisition start: +/- 2ms from stimulus onset.
A/D resolution: 16bit. Points per trace: 450 displayed.
Gain Automatic: Before each new intensity is tested, the best suitable gain is automatically selected. Manual: 6dB steps from 74dB to 104dB (10μV to 320μV input).
Rejection Selectable.
Raw EEG Displayed online. Refresh rate: 10Hz typical.
Filters Digital filtering for Low Pass and High Pass. Low Pass FIR filters without time shift of wave peak. High Pass fi lters analog Butterworth 0.5 to 100Hz 6/12dB octav. On the EP15/EP25 or from any reader station in a network it is possible to apply different visual filtering during testing as well as after the test is completed.
Patient communication Talk forward.
Cochlear implants The EP25 may be controlled or may itself control stimulators for cochlear implants. EABR (FDA approved).
HELP On-line Help for buttons, entry fields etc., as well as an electronic operation manual with search functions and cross references are included.
EP25 features ECochG recordings with markers. Middle Latency. Late Latency (P300, MMN etc.). VEMP (optional). Cochlear implant stimulator control.
Included parts EP15 / EP25 Software CD
ETB Standard electrode cable with buttons
ETU Universal electrode cable
ETR Electrode cable with re-usable electrodes
ETS Electrode cable spring
PEG15 Set of 25 single use pre-gelled electrodes
ETT Tip trode electrode cable set (only EP25)
TTE25 Tip trode gold electrodes 10 pcs. for ECochG (EP25 only)
20 pcs. of Infant eartip (2 x 10)
EarTone ABR Insert ear phones w/foam tips
SPG15 Tube of skin preparation gel
Ten20™ Electrode gel
Gauze Swabs
LBK15 Loop Back unit for system performance check
Alcohol pads (100 pcs.)
Optional parts TDH39 Headset
DT48h Headset
B71 Bone conductor
EPA3 Cable collector (one channel/3 electrodes)
License for VEMP functions
Transducers Ear-Tone ABR insert phones included.
Independent calibration for TDH39 (Optional)
Independent calibration for B71 (Optional).