otometrics Madsen AccuScreen PRO User manual

AccuScreen PRO
Otoacoustic Emissions and Automated
ABR Screener
User Manual
Doc no. 7-26-6810/08
Part no. 7-26-68100
0124 1275

FM template version: 01-02-2010
Copyright notice
No part of this Manual or program may be reproduced, stored in a retrieval system, or transmitted, in any form
or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written con-
sent of GN Otometrics A/S.
Copyright©2011, GN Otometrics A/S
Printed in Denmark by GN Otometrics A/S, Denmark
All information, illustrations, and specifications in this manual are based on the latest product information
available at the time of publication. GN Otometrics A/S reserves the right to make changes at any time with-
out notice.
Warranty/Disclaimer
The warranty of GN Otometrics A/S and the manufacturer, Fischer-Zoth Diagnosesysteme GmbH/ Natus Eu-
rope GmbH with regard to operation, quality or functionality of the AccuScreen does not apply if:
• The equipment is not installed and used in accordance with the instructions in the manual.
• Installation, assembly, extensions, readjustments, modifications, service and repair are performed by per-
sonnel other than those authorized by GN Otometrics.
• The electrical installation of the equipment is not connected to earth and does not comply with IEC require-
ments.
Version release date
8. September 2011
Technical support
Please contact your supplier.
GN Otometrics A/S
9 Hoerskaetten
DK-2630 Taastrup Denmark
T: [phone], F: [phone]
www.otometrics.com

GN Otometrics A/S 3
Contents
1 Introduction
1.1 The AccuScreen PRO .................................................................................................................. 9
1.1.1 Intended Use .................................................................................................................. 10
1.1.2 AccuLink ......................................................................................................................... 10
1.2 About this manual ....................................................................................................................... 10
1.3 New Features ............................................................................................................................. 11
1.4 Typographical conventions ......................................................................................................... 11
2 Test Methods
2.1 About Otoacoustic Emissions ..................................................................................................... 13
2.1.1 Recording OAEs.............................................................................................................13
2.1.2 Types of OAEs ............................................................................................................... 14
2.1.3 Applications of OAEs...................................................................................................... 15
2.1.4 How the AccuScreen PRO T-module determines a PASS............................................. 15
2.1.5 How the AccuScreen PRO D-module determines a PASS ............................................ 16
2.2 About Auditory Brainstem Response (ABR) ............................................................................... 17
2.2.1 How the AccuScreen PRO A-module determines a PASS ............................................ 18
2.2.2 Advantages of combined OAE/ABR-Screening.............................................................. 19
2.3 The different versions of the AccuScreen PRO .......................................................................... 19
3 The AccuScreen PRO
3.1 Front view ................................................................................................................................... 21
3.2 Top view ..................................................................................................................................... 22
3.3 Bottom view ................................................................................................................................ 22
3.4 Reverse side view....................................................................................................................... 23
3.5 Display & control panel ............................................................................................................... 24
3.6 Ear probe .................................................................................................................................... 25
4 Before You Start
4.1 Safety.......................................................................................................................................... 27

User Manual AccuScreen PRO
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4.2 Unpacking the AccuScreen PRO................................................................................................ 27
4.3 Operating temperature................................................................................................................ 28
4.4 Storing the AccuScreen PRO ..................................................................................................... 28
4.5 Battery ........................................................................................................................................ 28
4.5.1 Battery test ..................................................................................................................... 28
4.5.2 Removing and recharging the battery ............................................................................ 29
4.5.3 The charger .................................................................................................................... 30
4.5.4 Battery safety information............................................................................................... 30
4.5.5 Increasing service life ..................................................................................................... 31
4.5.6 Environmental Protection ............................................................................................... 31
4.6 Data/printer interface .................................................................................................................. 31
5 Preparing for testing
5.1 Connecting the probe ................................................................................................................. 33
5.2 Connecting the electrode cable for ABR testing ......................................................................... 33
5.3 Connecting the Y-cable for ABR testing ..................................................................................... 33
5.4 Preparing the test environment................................................................................................... 34
5.5 Preparing the patient .................................................................................................................. 34
5.5.1 Placing electrodes for ABR testing ................................................................................. 35
5.5.2 Fitting the eartip on the probe......................................................................................... 36
5.5.3 Fitting the Ear Couplers.................................................................................................. 36
5.6 Preparing the AccuScreen PRO .................................................................................................38
6 Tests
6.1 Test methods .............................................................................................................................. 41
6.1.1 Test process TEOAE...................................................................................................... 41
6.1.2 Test process DPOAE ..................................................................................................... 42
6.1.3 Test process DPOAE Diagnostic.................................................................................... 45
6.1.4 Test process ABR...........................................................................................................47
6.2 Monitoring the test ...................................................................................................................... 50
6.2.1 TEOAE tests................................................................................................................... 50
6.2.2 DPOAE tests .................................................................................................................. 51
6.2.3 DPOAE Diagnostic tests................................................................................................. 52
6.2.4 ABR tests........................................................................................................................ 53
6.3 After the test ............................................................................................................................... 53
6.3.1 Adding comments to a test ............................................................................................. 53
6.4 Interpretation of the results ......................................................................................................... 54
6.4.1 TEOAE ........................................................................................................................... 54

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6.4.2 DPOAE ........................................................................................................................... 56
6.4.3 ABR ................................................................................................................................ 56
7 Quick Test
7.1 Performing a Quick Test ............................................................................................................. 59
8Printing
8.1 The "Print results" menu ............................................................................................................. 61
8.1.1 Types of printout............................................................................................................. 62
9 View Results
9.1 Viewing test data ........................................................................................................................ 65
10 The Transfer/Delete Data Menu
10.1 Data transfer ............................................................................................................................... 67
10.1.1 Transfer via cable ........................................................................................................... 67
10.1.2 Transfer via infrared ....................................................................................................... 68
10.2 Delete data ................................................................................................................................. 68
11 Options
11.1 Self Test...................................................................................................................................... 71
11.1.1 Probe test ....................................................................................................................... 72
11.1.2 Discharge battery ........................................................................................................... 73
11.1.3 Codec test ...................................................................................................................... 73
11.1.4 LCD display test ............................................................................................................. 73
11.1.5 Keyboard test ................................................................................................................. 73
11.2 Settings 1.................................................................................................................................... 74
11.2.1 Language........................................................................................................................ 74
11.2.2 Date/Time ....................................................................................................................... 75
11.2.3 Date/Time format............................................................................................................ 75
11.2.4 Background Lighting (Display)........................................................................................ 75
11.2.5 Sounds ........................................................................................................................... 75
11.2.6 Default test ..................................................................................................................... 76
11.3 Settings 2.................................................................................................................................... 76

User Manual AccuScreen PRO
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11.3.1 User login ....................................................................................................................... 77
11.3.2 Patient list mode ............................................................................................................. 77
11.4 ABR configuration....................................................................................................................... 78
11.4.1 Notch filter setting........................................................................................................... 78
11.4.2 ABR stimulus level setting .............................................................................................. 79
11.5 Memory Used ............................................................................................................................. 79
11.6 Version information..................................................................................................................... 80
12 Maintenance
12.1 Probe cleaning and maintenance ............................................................................................... 81
12.1.1 Cleaning and disinfecting the probe tip .......................................................................... 81
12.1.2 Changing the acoustic filter disc..................................................................................... 83
12.1.3 Eartips ............................................................................................................................ 83
12.1.4 Cleaning and disinfecting procedures ............................................................................ 83
12.1.5 Cleaning and disinfecting the test cavity ........................................................................ 84
12.2 Cleaning the Y-cable .................................................................................................................. 84
12.3 Battery maintenance................................................................................................................... 84
12.3.1 Safety information........................................................................................................... 84
12.3.2 Increasing service life ..................................................................................................... 85
12.3.3 Environmental protection................................................................................................ 85
12.4 Cleaning the AccuScreen PRO .................................................................................................. 85
13 Safety Information
13.1 Safety.......................................................................................................................................... 87
13.1.1 Safety Symbols............................................................................................................... 87
13.2 Warranty ..................................................................................................................................... 87
13.3 Repair, after-sales service and regular checks........................................................................... 88
13.3.1 Declaration ..................................................................................................................... 88
13.3.2 Service and repair .......................................................................................................... 88
14 Status and error Messages
15 Technical Specifications
15.1 Device......................................................................................................................................... 91
15.2 Battery and charger .................................................................................................................... 91
15.3 Probe .......................................................................................................................................... 92

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15.4 Measurement techniques ........................................................................................................... 92
15.5 Device class................................................................................................................................ 93
15.6 Applied standards ....................................................................................................................... 93
15.7 Manufacturer............................................................................................................................... 94
15.8 Distributor ................................................................................................................................... 94
16 Index

User Manual AccuScreen PRO
8GN Otometrics A/S

AccuScreen PRO User Manual Introduction
GN Otometrics A/S 9
1 Introduction
Thank you for purchasing the AccuScreen PRO handheld Otoacous-
tic Emissions and Automated ABR Screener.
This manual is your guide to the use and maintenance of your
AccuScreen PRO.
We strongly recommend that you read it carefully through before
using your AccuScreen PRO for the first time.
We also recommend that you take particular note of the cleaning and
maintenance instructions. Failure to use and maintain the Accu-
Screen PRO correctly may void your warranty.
1.1 The AccuScreen PRO
The AccuScreen PRO is a fast, reliable, easy to use, and lightweight
hearing screener, optimised for neonatal screening. The AccuScreen
PRO closes the gap between electrophysiological assessment, which
is time-consuming and expensive, and behavioural observation.
The AccuScreen PRO uses TEOAE (Transiently Evoked Otoacoustic
Emissions) and DPOAE (Distortion Product Otoacoustic Emissions)
technologies, which are highly effective for neonatal hearing screen-
ing. Otoacoustic Emissions measure cochlear mechanics and indi-
cate whether the cochlea is functioning correctly or not. Children's
emissions are typically strong, which makes them easy and fast to
detect. Emission strength usually decreases with age.
Automated ABR (Auditory Brainstem Response) is also available in
the AccuScreen PRO. This technology measures responses to sound
in the auditory pathways. It provides a valuable supplement to TE-
OAE and DPOAE screening, and is an essential tool for screening of
infants at risk of hearing loss.
The simple, yet reliable technology ensures that hearing loss can be
detected, and intervention can be implemented, at an early age.
With early intervention, hearing-impaired children are given the
possibility of developing normal speech and language skills.

10 GN Otometrics A/S
Introduction AccuScreen PRO User Manual
1.1.1 Intended Use
The AccuScreen PRO TEOAE is optimised for use with neonates and
the paediatric population, while DPOAE test is appropriate for all
patients. The AccuScreen PRO probe is extremely lightweight (only
4 grams), and comes with comfortable, easy to insert probe tips. This
makes it ideal for use with infants and children, as well as older pa-
tients.
The TEOAE tests are directed at children less than 6 years of age. The
ABR and DP tests are directed at all age groups.
Important:
GN Otometrics A/S does not guarantee the accuracy of the test re-
sults or the tests themselves, if other accessories than those supplied
by GN Otometrics A/S are used for this device (i.e. eartips, elec-
trodes, Ear Couplers, etc.).
1.1.2 AccuLink
For details concerning the AccuLink software please see AccuHelp
in the AccuLink software.
1.2 About this manual
Important:
Please note that menu selections and screen shots in this manual
may not reflect the configuration of your test device.
This manual contains a description of the main functions of the Ac-
cuScreen PRO. GN Otometrics A/S recommends that you make
yourself familiar with the following issues:
Installation
Section 4.2, ‘Unpacking the AccuScreen PRO” on page 27, Chapter
3, “The AccuScreen PRO” on page 21, and Chapter 5, “Preparing for
testing” on page 33 contain a full description of unpacking instruc-
tions, controls and socket connections, and how to install the device.
Safety
This User Manual contains information and warnings which must
be followed to ensure the safe performance of the AccuScreen PRO.
Local government rules and regulations, if applicable, should also
be followed at all times.
Please see the overview of device labelling in Chapter 3, “The Accu-
Screen PRO” on page 21 and read the warning notes in Chapter 13,
“Safety Information” on page 87.