EP15/EP25 ABR - Stand Alone Units

The EP15/25 is identical to EP15 mentioned below, but additionally allows tests like ECochG, ML, LL, P300 and MMN, each with dedicated filters and marking tools etc. Also the EP25 allows connection to Cochlear Implant stimulators for EABR tests.

EP15 ABR Stand Alone Unit

EP15/25 is a modern 2 channel ABR system in which a complete PC running Windows98 is integrated into a stand alone design. This allows for a functionality where portability and general functionality exceeds traditional PC- or laptop based ABR systems. Also all safety aspects which are often difficult to implement are taken care of effectively this way.

The EP15/25 can run automatic test routines for ease of operation, and it comes with common examples already preprogrammed.

Stimuli include masking, clicks and tone bursts, allowing frequency specific threshold tests. The included normative data, and the feature of automatic placement of Jewett marks facilitate the diagnostic evaluation.

A database and integrated report generator is included, and the possibility to send individual sessions by e-mail or diskette for evaluation elsewhere is a highly practical feature.

The extensive display control options like filtering, display gain etc. can all be manipulated after the recording has taken place and may even be handled by any workstation in a network, if the EP15/25 is run within a PC network.

The EP15/25 can be upgraded with Interacoustics' upcoming TEOAE / DPOAE system. This will make up a fully integrated system for OAE and ABR. In addition to the economical saving due to shared hardware, it allows for very smooth and efficient patient handling, also for those failing a first stage OAE test.

EP15/EP25 Technical Specifications

Standards:

EN 60601-1 (General safety) Class I, Type BF
EN 60601-1-1 (Safety of systems)
EN 60601-1-2 (EMC)
EN 60601-2-26 (Electroencephalographs)
EN 60645-3 (Auditory test signals)

Medical CE-mark:

Approved for Medical CE Marking by TÜV. Identification No. 0123.
System
Stand alone system with Windows 98
PreAmplifier
2 channels

Noise:

<6.0nVÖHz
<0.3µ VRMS (0-3kHz)
CMR ratio: >115dB unfiltered at any frequency between 0.1Hz and 100Hz.
Input impedance: >10MW
Accepted electrode offset: >300mV

Power:

From main unit

Safety:

Full optical isolation from main unit.
(EP25 uses EPA25 PreAmp)
(EP15 uses EPA15 PreAmp)

Impedance Check:

30Hz rectangle.
Impedance information for each individual electrode.
No unplugging of electrode leads required.
Readout directly on preamplifier.

Range:

.5kW to 10kW (EPA15)
.5kW to 25kW (EPA25)

Stimulation Transducers:

Standard Ear-Tone 3A ABR phones included.
Independent calibration for TDH39 (optional)
Independent calibration for B71 (optional)

Stimuli:

Click and Tone Bursts

Rate:

.011 – 80.1 per sec.
20 – 130dB peSPL in 1dB steps
-10 – 100dB nHL in 1 dB steps

Tone Burst:

Frequencies 500 Hz to 4kHz
Number of cycles: 1 – 3120

Envelopes:

Blackman,
Gaussian,
Hanning,
Hamming,
Bartlett,
Rectangle,
and manual rise/plateau/fall.

Soft Attenuator:

A soft attenuator function provides a gradual change whenever the stimulation level is changed.

Masking:

White noise
0 - -40dB relative to stimulus.
Recording
Number of channels:
2 channels.

Number of curves per session:

Unlimited (thousands if needed!).

Automatic Tests:

Several automatic test protocols included. As many automatic tests as desired, may be designed by operator.
Partial manual control during automatic testing is available.

Automatic test control:

Wave reproducibility is calculated during the test. Results are shown on-line, and may be set to control test run, for time saving purposes.

Data Acquisition:

Analysis time: 5 to 900mS 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 system:

Two rejection engines work in tandem:
One traditional voltage based system and one advanced biologically weighting system.

Raw EEG:

Displayed online.

Refresh rate:

10Hz typical

Filters:

Digital filtering for Low Pass and Hi Pass.
Low Pass FIR filters without time shift of wave peak.
On the EP15/25 or from any workstation in a network it is possible to apply different filtering during testing as well as after the test is completed.

Analogue input filters:

0.5Hz to 100Hz - will track test selection.

Waveform control:

Automatic Jewett marks
Post recording HiPass filtering
Post recording LowPass filtering
General display gain
Individual curve display gain
Automatic single curve display
Normal latency indication
Superimpose waveforms
Manual curve position control
Automatic curve position control
Compare curves between sessions
Display curve’s rare. and cond. parts
Display contralateral curve
Merge curves
Generate differential curves
Hide curves
Delete curves
Split screen for Left and Right curves
Automatic intensity indexing
Automatic curve spacing
Displayed time scale control
Recording onset control
Peak – baseline calculation
Peak - trough calculation
Double cursor
Curve comments label
etc.

Patient communication:

Talk forward with built-in microphone.
Talk back with built-in loudspeaker.

Database:

Included – storage only limited by hard drive size. Patient demographic data. Patient journal.
May additionally include data from Interacoustics' audiometers and impedance audiometers.
Easy back-up function.
Diagnosis
Editing:
All curves, latency plots, numerical values and comments can be printed by any Windows compatible printer.

Normal data:

Normal data and deviations can be entered relative to age group and gender. (Sample included).
Norm data corresponding to patient data will be shown during editing and printed out if desired.

Reporting:

Up to four nicely laid out pages holding all traces, latency graphs, numerical values and comments and diagnostic session report.
An automatic report generation allows standard diagnostic reports to be used as text templates for easy diagnostic reporting.
Various

Cochlear Implants:

The EP25 (not the EP15) may be controlled or may itself control stimulators for cochlear implants.

Screen:

12'1" Wide Angle Industrial TFT.
May be disconnected from main unit.
Additional external monitor connection available.

Networks:

The EP15/25 may connect to a network. Subsequent marking and editing, including filter changes etc., may be carried out from other workstations at any time, without the EP15/25 being available. With optional software even tests in progress may be monitored and controlled from any work station in the network.

NOAH:

Module available for EP15/25 for NOAH 3.0 (optional).

OAE:

Future upgrades will include OAE.

HELP:

On-line Help for buttons, entry fields etc., as well as an electronic operation manual with search functions and cross references are included.

EP15 versus EP25:

EP15 differs from EP25 only with:
No ECochG screen
Recording window max 15mS
No ML, LL, P300 and MMN tests
Max impedance check 10kW
No cochlear implant stimulator control
Upgrade kit (hardware and software) available, changing EP15 into EP25

Dimensions:

(W x D x H) 36.5 x 25.5 x 38 cm /
14 x 10 x 15 inches.

Weight:

12 kg / 26.5 lbs. including all accessories.

Included Accessories:

Preamplifier
EAR-Tone ABR Insert Earphones
ETC15 Electrode Cable Standard
EUC15 Electrode Cable Universel
PEG15 Bag of pre-gelled Electrode Pads
SPG15 Skin Preparation Gel
10pcs. of Tip Trodes electrodes for ECochG (EP25
KAT40 Keyboard (grey color)
Mouse (grey color)
Mains Cord
PCR-EP15 Dust Cover
Operation/Service/Multilingual CE Manuals

Optional Accessories:

TDH39 Headset
B71 Bone Conductor
BERAphone Kit
ETS15 Table Stand with 1.6 m cable
Wall Mounting Kit with 1.6 m cable
Inclusion of CD Recorder for back-up
Upgrading kit for upgrading EP15 to EP25

Click here to download full leaflet in PDF format

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