Table of contents
1 AT235 Tympanometry Module ........................................................................................................ 1
1.1 About the AT235 Tympanometry Module ........................................................................... 1
1.2 Preparing for the Test ......................................................................................................... 1
1.2.1 Tympanometry patient instruction .......................................................................... 1
1.2.2 Visual inspection of the ear canal .......................................................................... 1
1.2.1 Placement of the contralateral phones .................................................................. 2
2
General Operation of the AT235 Tympano-metry Module .............................................................. 3
2.1 Tympanometry .................................................................................................................... 3
2.2 Reflex .................................................................................................................................. 5
2.3 Reflex Decay ....................................................................................................................... 7
2.4 Reflex Latency .................................................................................................................... 8
2.5 Eustachian Tube Function – Non-perforated Eardrum ....................................................... 9
2.6 Eustachian Tube Function – Perforated Eardrum ............................................................ 11
2.7 Eustachian Tube Function – Patulous Eustachian Tube .................................................. 12
3
The Setup Menu ............................................................................................................................ 13
3.1 Common settings – IMP.................................................................................................... 13
3.2 Protocol Settings ............................................................................................................... 14
3.2.1 Tymp settings ....................................................................................................... 15
3.2.2 Reflex settings ...................................................................................................... 17
3.2.3 Reflex decay ........................................................................................................ 20
3.2.4 Reflex latency ....................................................................................................... 22
3.3 Eustachian Tube Function – Non-Perforated Eardrum .................................................... 24
3.4 Eustachian Tube Function – Perforated Eardrum ............................................................ 26
3.5 Eustachian Tube Function – Patulous Eustachian Tube .................................................. 27
3.6 Pause ................................................................................................................................ 28
3.7 Manage Protocol Settings ................................................................................................. 29
3.8 Instrument Settings ........................................................................................................... 30
4
AT235 Audiometry Module ............................................................................................................ 33
4.1 About the AT235 Audiometry Module ............................................................................... 33
5
General Operation of the AT235 Tympano-metry Module ............................................................ 35
5.1 Tone Test .......................................................................................................................... 35
5.2 Auto Test: Hughson-Westlake .......................................................................................... 36
6
The Setup Menu ............................................................................................................................ 37
6.1 Common Settings - AUD................................................................................................... 37
6.2 Tone Settings .................................................................................................................... 38
6.3 Auto Settings ..................................................................................................................... 39
7
Quick Guides ................................................................................................................................. 41
7.1 Selecting the Correct Ear Tip ............................................................................................ 41
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