Welch Allyn MicroTymp 3 portable tympanometric instrument User Manual
®
MicroTymp
3
portable tympanometric
instrument
Directions for use
ii Welch Allyn MicroTymp3 portable tympanometric instrument
REF
© 2009 Welch Allyn. All rights are reserved. No one is permitted to reproduce or duplicate, in any form, this manual or any part
thereof without written permission from Welch Allyn.
Welch Allyn assumes no responsibility for any injury to anyone, or for any illegal or improper use of the product, that may result from
failure to use this product in accordance with the instructions, precautions, warnings, or statement of intended use published in this
manual.
Welch Allyn and MicroTymp are registered trademarks of Welch Allyn.
Software in this product is copyrighted by Welch Allyn or its vendors. All rights are reserved. The software is protected by United
States of America copyright laws and international treaty provisions applicable worldwide. Under such laws, the licensee is entitled
to use the copy of the software incorporated with this instrument as intended in the operation of the product in which it is
embedded. The software may not be copied, decompiled, reverse-engineered, disassembled or otherwise reduced to
human-perceivable form. This is not a sale of the software or any copy of the software; all right, title and ownership of the software
remain with Welch Allyn or its vendors.
For information about any Welch Allyn product, call the nearest Welch Allyn representative:
USA + 1 315 685 4560
Canada 800 561 8797 China + 86 216 327 9631
European Call Center + 35 3 46 906 7790 France + 33 1 60 09 33 66
Germany + 49 7477 92 71 86 Japan + 81 3 3219 0071
Latin America + 1 305 669 9003 Netherlands + 31 15 750 5000
Singapore + 65 6419 8100 South Africa + 27 11 777 7555
United Kingdom + 44 20 7365 6780 Sweden + 46 8 58 53 65 51
102921 (CD)
80015401 Ver A
Welch Allyn, Inc.
4341 State Street Road
Skaneateles Falls, NY 13153 -0220 USA
www.welchallyn.com
800 535 6663
Welch Allyn, Ltd.
Navan Business Park
Dublin Road, Navan
County Meath, Republic of Ireland
Australia + 61 2 9638 3000
800 074 793
Acknowledgments
Welch Allyn gratefully acknowledges the assistance of Robert H. Margolis, Ph.D., of the University of Minnesota for his assistance in
preparing the Interpreting tympanogram results and Glossary sections of this manual.
Contents
1 - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
iii
About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
About the device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Controls, indicators, and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Handle components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Printer/Charger components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Initial setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Set up the printer/charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Set up the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Charge the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 - Completing a test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Obtaining a tympanogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Select a probe tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Start a test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Store and display data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Erase memory contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Change the default frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3 - Understanding the LCD messages . . . . . . . . . . . . . . . . . . . . . . . . . 23
Company identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Frequency confirmation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Leak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Right store/Left store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Right clear/Left clear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Low battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Range error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Zero error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Calibration due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Needs service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
System check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Data Transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4 - Interpreting test results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Tympanograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Gradient (width) measurements (226 Hz only) . . . . . . . . . . . . . . . . . . . . . . . . . . 32
226-Hz mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
iv Contents Welch Allyn MicroTymp3 portable tympanometric instrument
Normative values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Interpreting 226-Hz tympanogram results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Normal middle ear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Low admittance tympanograms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
High admittance tympanograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Negative and positive peak pressure tympanograms (left or right shift) . . . 35
Flat tympanograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
1000-Hz mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Tympanometry in young infants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Normative values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Interpreting 1000-Hz results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Refer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Retest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Influence of altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Influence of temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5 - Printing 226-Hz results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Print memory contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Printout formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Tympanogram section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Data section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Interpretive messages section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Select printout formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Change from manual to automatic printout . . . . . . . . . . . . . . . . . . . . . . . . . 45
Change printout format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Printer function messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Printer service codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6 - Maintenance and troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 49
Maintain the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
About the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Replace the tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Replace the paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Functional Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Check the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Check the printer/charger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
A - Middle ear pathologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Low-admittance pathologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Otitis media with effusion (OME). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Middle ear tumor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Lateral ossicular fixation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Otosclerosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Tympanic membrane abnormalities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Ossicular disruption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
B - Service and warranty information. . . . . . . . . . . . . . . . . . . . . . . . . . 61
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Rechargeable battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Directions for use Contents v
C - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Technical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Probe tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Pressure measurement system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Admittance measurement system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Storage environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Probe tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Printer paper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Printer/Chargers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Operating ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Equivalent units and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Disposal of non-contaminated electrical and electronic equipment Directive
2002/96/EC-WEEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Guidance and manufacturer’s declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Emissions and immunity information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
D - Replacement parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . 73
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
vi Contents Welch Allyn MicroTymp3 portable tympanometric instrument
7
Note
1
Introduction
About this document
This document is written for clinical professionals who are qualified to perform
tympanometry. The intended clinical environment is any location where tympanometry is
performed (including but not limited to hospitals, clinics, medical offices, and schools).
This document describes how to operate and maintain the MicroTymp Handle and Printer/
Charger.
Before using the tympanometer — or before setting up, configuring, troubleshooting, or
servicing the device — you must read and understand this document and all other
information that accompanies the tympanometer and its accessories.
Intended use
This device is an auditory impedance tester intended to detect possible otologic disorders
associated with the functioning of the middle ear.
About the device
Federal US law restricts sale of the device identified in this manual to, or on the order of, a
licensed physician.
Using this device’s 226-Hz and 1000-Hz tympanometry settings, you can quickly and
easily obtain objective results supporting diagnosis of otitis media with effusion and other
middle ear disorders. This information can result in more thorough diagnoses as well as
more effective monitoring, treatment, consultation, and referral.
The 226-Hz test data stored in the memory of the Handle may be printed using the
Printer/Charger. The Printer/Charger reads the information from the Handle and prints out
tympanograms and interpretation.
The MicroTymp3 also provides the ability to test patients utilizing a 1000-Hz
frequency mode. This mode features a quick interpretation result that displays a
Pass, Refer, or Retest message on the LCD (see Chapter 4). Results from the
quick interpretation mode can be documented using the 1000-Hz screening
results card. Results from the 1000-Hz quick interpretation mode will not print.
The Printer/Charger also charges the rechargeable battery in the Handle.
8 Introduction Welch Allyn MicroTymp3 portable tympanometric instrument
Liquid Crystal
Display (LCD)
Left memory button
Test butto n
Right memory button
Infrared data
transfer window
Tip
Probe
Tip
ejector
Battery
cover
Micro-USB port
NOTE: Reserved for future use
Lithium-ion
battery
Side view Front view
Bottom view
Interior view
Handle
switches
Controls, indicators, and connectors
Handle components
2
GR
1.0
A
1
0.5
GR
Ya - mmho
C
PRESSURE - daPa
TEST
Portable Tympanometric Instrument
MicroTymp
®
3
+200 Vea - cc
0
-400 -200 0 200
C
74227
Patent Pending
IEC TYPE 3
ANSI TYPE 4
Skaneateles Falls, NY USA
0297
US
US Pat #5,383,097
REF
23650
ON
ON CTS
REF
72910
Lithium
Ion
-
ON
ON CTS
+
123
4
OFF
123
OFF
4
Directions for use Introduction 9
Power Cord
Tip bo x
POWER
indicator
CHARGE
indicator
FEED button
PRINT button
Paper
slot
Paper access
cover
Charging well for
MicroTymp 2 or 3
Card holder
with 1000-Hz
screening
results cards
IEC power cord
receptacle
Printer/Charger
switches
To IEC power
cord receptacle
To pow e r
receptacle
Printer/Charger components
10 Introduction Welch Allyn MicroTymp3 portable tympanometric instrument
TEST
GR
A
L
C
GR
-20ºC
+49ºC
95%95%
Symbols
Documentation symbols
Warning
(Warnings indicate conditions or practices
that could lead to illness, injury, or death.)
Consult instructions for use Hot surface
Operation symbols
POWER indicator FEED button
CHARGE indicatorPRINT button
TEST button RIGHT memory button
Gradient width adult LEFT memory button
Gradient width child Switch options ON/OFF symbol
Caution
(Cautions indicate conditions or practices
that could damage the equipment or other
property)
R
Shipping, storing, and environment symbols
Temperature limits Relative humidity limit
This end up Recycle
Recycle the product separate from other
disposables. See www.welchallyn.com/
weee for collection point and additional
information.
Power and connectivity symbols
Lithium-ion
Separate batteries from other disposables
for recycling.
Directions for use Introduction 11
0297
REF
SN
Certification symbols
Meets essential requirements of European
Medical Device Directive 93/42/EEC
74227
Class I equipment, Type BF
(Handle)
Class I equipment, Type B
(Printer/Charger)
Miscellaneous symbols
Reorder number Manufacturer
Complies with applicable U.S. and
Canadian medical safety standards
European regulatory manager
Serial number
12 Introduction Welch Allyn MicroTymp3 portable tympanometric instrument
General warnings
WARNING Explosion risk. Do not use MicroTymp Handle or Printer/Charger near
flammable anesthetics.
WARNING Electric shock hazard. Do not attempt to disassemble the Printer/
Charger. Refer all servicing to Welch Allyn or a Welch Allyn authorized service
representative.
WARNING Electric shock hazard. Use the USB connector only to connect to
devices complying with IEC 60601-1 or other IEC standards as appropriate to the
device. The user is responsible for verifying that the system complies with the
requirements of the system standard IEC 60601-1-1 if additional devices are
connected to the MicroTymp Handle.
WARNING Improper handling or disposal of the battery can lead to heat
generation, smoke, bursting, or fire.
WARNING Do not disassemble, modify, or solder the battery.
WARNING Do not directly connect (short circuit) the positive (+) and negative (-)
battery terminals.
WARNING To avoid short circuits, keep the battery terminals away from metal
objects.
WARNING Do not dispose of the battery in fire.
WARNING Do not expose the battery to temperatures above 80°C (176°F).
WARNING Use only the specified charger to charge the battery.
General cautions
Caution Charge only Handle #23640, Handle # 23650, or AudioScope 3
(#23300) in the Printer/Charger.
Caution If the device has not been stored within the operating temperature
range, allow 24 hours minimum for it to return to operating temperature range
(15-35°C or 59-95°F) before using.
Directions for use Introduction 13
+
+
+
Caution Do not store either the Handle or Printer/Charger at temperatures
below -20°C (-4°F) or above +49°C (120°F). Continual exposure to extremely low
or high temperatures can permanently damage components.
Caution The battery must be removed if the Handle is to be stored or placed
anywhere other than in the powered Printer/Charger for more than one month.
Failure to do this can result in damage to the Handle.
Caution This instrument contains components which are static sensitive.
Before touching any internal handle component, be sure that you have
discharged any static electricity by touching a grounded metal object.
Caution To prevent equipment damage, charge the Handle only with the
Printer/Charger (#7117x).
General notes
The MicroTymp Printer/Charger (#7117x) will charge and print data from the MicroTymp2
or MicroTymp3 Handle. However, the original MicroTymp Printer/Charger (#7113x) will
neither charge nor print data from the MicroTymp3 Handle.
Please complete and return the warranty registration. It validates the warranty and allows
Welch Allyn to communicate calibration notices and software changes.
Initial setup
Set up the printer/charger
1. Place the Printer/Charger on a flat, horizontal surface.
2. Plug the power cord into the receptacle in the rear of the Printer/Charger, then
connect the power cord to a receptacle with proper voltage, frequency, and plug type.
The solid green POWER indicator will illuminate to indicate that the Printer/Charger is
receiving power.
Set up the handle
Install the rechargeable battery in the handle as follows:
1. Unscrew the battery cover in a counterclockwise direction using the #1 Phillips head
screwdriver provided. Save the screw.
14 Introduction Welch Allyn MicroTymp3 portable tympanometric instrument
Note
72910
REF
+
Lithium
Ion
72910
REF
+
Lithium
2. Remove the battery cover by lifting the bottom of the cover away from the probe tip.
3. Insert the battery by placing the positive (+) end of the battery against the contact in
the holder. Push the battery lightly to compress the contact, and lower the battery
into the compartment.
Insert the battery only as shown. Failure to observe the correct polarity will
prevent the instrument from functioning.
4. Replace the cover by inserting the tip end under the front cover, lowering the opposite
end, and replacing the screw.
5. Tighten screw in clockwise direction. To avoid stripping the screw threads, do not
tighten excessively.
Directions for use Introduction 15
Charge the handle
1. Before first use, place the Handle (with battery installed) into the Printer/Charger
charging well with the LCD and buttons facing you.
2. Leave the Handle in the well for a minimum of 16 hours to achieve a full charge.
You are now ready to take a test. See Ch. 2 for instructions to take a test.
16 Introduction Welch Allyn MicroTymp3 portable tympanometric instrument
17
Note
Pinna
Tip ejector
Tip
Probe
Seal
External ear canal
Tym pa ni c
membrane
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
2
Completing a test
Obtaining a tympanogram
Select a probe tip
1. After examining the subject's ear canal opening, select a tip which is large enough to
seal the entrance of the ear canal.
To change tips, either pull the tip off by hand or slide the tip ejector towards the tip.
Tips are not intended to be deeply inserted into the ear canal. Using an improper
tip size causes leaks, and will make it difficult to complete a test. Use only
MicroTymp3 tips with the MicroTymp3 Handle.
Start a test
2. Push the tip onto the probe, making sure that the tip is fully seated.
1. Pick up the handle and press any button. The Welch Allyn screen will display.
18 Completing a test Welch Allyn MicroTymp3 portable tympanometric instrument
Note
Note
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
R
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
Time-out feature. The tympanometer automatically turns off 15 seconds after the
last test or button activation.
2. Press the button below the Liquid Crystal Display (LCD) to show the
TEST
current frequency. One of the screens shown below will appear.
2
1
GR
A
GR
C
+200 Vea - cc
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
The default frequency set at the factory is 226 Hz. To change the default
frequency to 1000 Hz, see the instructions at the end of this chapter.
3. To switch to the other frequency, press both the Right memory and Left
L
memory buttons on the handle simultaneously until the desired frequency displays,
as shown below. Pressing the two memory buttons repeatedly toggles between
these two screens.
2
1
GR
A
GR
C
+200 Vea - cc
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
4. Press the button again to confirm the desired frequency. Either the
TEST
OPEN 226 or OPEN 1000 screen will display, as shown in step 2.
5. Once you’ve confirmed the desired frequency, proceed with the test. Grasp the
subject's pinna. Pull gently back to straighten the child's ear canal (or up and back for
adults). See the image on the left below.
6. While maintaining tension on the pinna, press the tip firmly against the ear canal
opening. See the image on the right below. Point the tip straight into the ear canal for
adults and slightly anteriorly for children.
Directions for use Completing a test 19
Note
Note
RLTEST
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
Note
Because of changes in air pressure during a test, the subject will feel slight
pressure in the ear canal. During the brief seconds when tympanometric
measurements are made, it is important that the clinician's hand is steady, and
that the subject does not talk, yawn, chew gum, cry, or move the head.
If the BLOCK, LEAK, or OPEN messages appear during the test, reposition the tip
to restart the test.
Once a seal is achieved, the TEST message appears on the LCD, followed by the volume
indication on the +200 Vea scale.
For 226 Hz, data points are displayed from right to left across the LCD as the test
progresses. The test is complete when the last data point is displayed. The image below
on the left illustrates the execution of a complete test. If patient or instrument movement
causes a leak beyond -100 daPa in 226-Hz mode, the test will be stopped but the data will
be saved. See the figure on the right below.
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
RLTEST
2
GR
A
1
GR
C
+200 Vea - cc
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
RLTEST
2
GR
A
1
GR
C
+200 Vea - cc
For 1000 Hz, the test is complete when one of two “Quick-Interpretation” messages
appears--either PASS or REFER--as shown in the examples below. If patient or instrument
movement causes a leak beyond -300 daPa in 1000-Hz mode, the test will be stopped but
the data will be saved.
2
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
GR
A
1
GR
C
+200 Vea - cc
RLTEST
A RETEST message may also appear, indicating that you should rerun the test.
20 Completing a test Welch Allyn MicroTymp3 portable tympanometric instrument
R
-400 - 200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
L
+
+
+
Store and display data
1. To store the results of the test, press the button which matches the tested ear, as
illustrated below.
The memory buttons are labeled for the right ear and for the left ear. When
test results are stored in memory, the RIGHT STORE or LEFT STORE message
appears momentarily on the LCD. Then the tympanogram which has been stored
reappears along with the right or left symbol (to indicate the contents of that
memory).
2
-400 -200 0 200
PRESSURE - daPa
GR
A
1
GR
C
+200 Vea - cc
Ya - mmho
1.0
0.5
0
2. Press either the Left or Right memory button to recall the information stored in
memory. You may recall memory contents at any time.
Erase memory contents
You can erase memory contents in two ways:
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
L
2
GR
A
1
GR
C
+200 Vea - cc
• By storing a new test. The device automatically erases the previous test when you
store a new test.
• By pressing either the Left or Right memory button for more than three seconds. This
action erases memory contents for that ear.
Change the default frequency
The default frequency set at the factory is 226 Hz. However, if the majority of your
patients are infants less than six months old, you may set 1000 Hz as the default
frequency. Use the procedure below to switch from one frequency to another.
1. Allow the Handle to power down.
2. Unscrew the battery cover in a counter clockwise direction using the #1 Philips
screwdriver provided. Save the screw.
Directions for use Completing a test 21
72910
REF
+
Lithium
ON CTS
ON
OFF
123
4
ON CTS
ON
OFF
123
4
72910
REF
+
-
Lithium
Ion
ON = 226 Hz
OFF = 1000 Hz
3. Remove the Handle cover by lifting the bottom of the cover away from the probe tip.
4. With a sharp, non-conductive object (like a toothpick or the wooden end of a Q-tip),
move switch 1 to the desired position as shown below.
Caution Potential damage to Handle. Do not use the screwdriver provided or
any other metal object to move the switch.
5. Replace the cover by inserting the tip end under the front cover, lowering the opposite
end, and replacing the screw.
6. Tighten the screw in a clockwise direction. To avoid stripping the screw threads, do
not tighten excessively.
22 Completing a test Welch Allyn MicroTymp3 portable tympanometric instrument
23
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
R
L
TEST
3
Understanding the LCD messages
The following messages may be displayed on the LCD during Handle operation.
Company identification
The Welch Allyn message will appear when you press any button.
Frequency confirmation
1.0
0.5
Ya - mmho
0
-400 -200 0 200
PRESSURE - daPa
2
1
GR
A
GR
C
+200 Vea - cc
These messages indicate the unit’s frequency options. You can toggle between
frequencies by simultaneously pressing both the Right memory and Left
memory buttons.
Press to confirm selected frequency and to exit frequency confirmation mode.
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