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OAE Hearing Screener
Directions for Use
REF 29400
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COPYRIGHT © 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 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, cautions, warnings, or statements of intended use published in this manual. Welch Allyn is a registered trad
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Distributed by Welch Allyn under agreement with Natus Medical Incorporated PROPERTY OF NATUS MEDICAL INCORPORATED ALL RIGHTS RESERVED U.S. Patents nos. 5,738,633 and 6,149,605 Bio-logic is a registered trademark of Natus Medical Incorporated IBM is a registered trademark of the International Business Machines Corporation Microsoft, Windows, is a registered trademark of Microsoft Corporation Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E 2
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Contents Chapter 1: Introduction .................................................................................................................... 4 About this manual ........................................................................................................................ 4 Chapter 2: Welch Allyn OAE Hearing Screener Components and Hardware Setup....................... 7 Cable Connections...................................................................................
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Chapter 1: Introduction The Welch Allyn OAE Hearing Screener measurement system performs otoacoustic emissions tests. Using a combination of hardware and software, the Welch Allyn OAE Hearing Screener produces a controlled acoustic signal in the ear canal and measures the resulting evoked emission that is generated by outer hair cells in the cochlea. The system collects and averages data samples until specified measurement parameters are achieved. For distortion product otoacoustic
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Abbreviations ART LVL - artifact level; refers to the threshold at which samples of data coming into the Welch Allyn OAE Hearing Screener for processing are rejected before averaging in order to keep noise from averaging into the response. Artifact level is reported in pressure units, milliPascals (mPa). WA OAE Load Software - loads the firmware that resides on the memory chip inside the Welch Allyn OAE Hearing Screener. This software also can be used to update the Welch Allyn O
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L1 - level or intensity of F1; the lower of the stimulus frequencies expressed in dB SPL. L2 - level or intensity of F2; the higher of the stimulus frequencies expressed in dB SPL. NF - noise floor; refers to the average amplitude of the background noise measured at frequencies surrounding the DP frequency during the DPOAE test. This value is expressed in dB SPL. RS232 - a cylindrical hardware connector with pins that must be aligned to the corresponding holes in the connecto
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Chapter 2: Welch Allyn OAE Hearing Screener Components and Hardware Setup Cable Connections The cable connections to the Welch Allyn OAE Hearing Screener box are described in the figure and the instructions below. Welch Allyn OAE Hearing Screener Box with Cable Connections Indicated Probe Cable Assembly 1. Align the pins in the connector end of the probe cable to the holes in the jack on the top of the Welch Allyn OA
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Probe part #29402 is compatible only with Welch Allyn OAE Hearing Screener (blue) hardware 29400/29401. Charger Unit Assembly The charger unit is not required for normal operation. The unit is attached to the Welch Allyn OAE Hearing Screener for the purpose of recharging the battery or to perform tests when the battery charge is low. 1. Plug the charger unit into the connector labeled +6V DC on the left side of the Welch A
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Communication Cable Assembly The communication cable is provided only for loading the Welch Allyn OAE Hearing Screener internal firmware or for downloading data to a computer. Communication takes place through a serial port or USB port and requires connection to a computer. To connect the communication cable, align the connector on the communication cable to the connector on the left side of the Welch Allyn OAE Hearing Screener box. 1. After verifying the connectors are properly
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Chapter 3: Environment and Patient Preparation There is minimal patient preparation required for an OAE test. Since the test measures a physiologic event, no behavioral response is required from the patient. Therefore, OAEs can be recorded on sleeping individuals or on patients who cannot reliably perform a pure tone audiometric test of hearing either because of illness, language barrier, developmental delays or cognitive deficits. It is necessary, however, that the patient cooperat
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Patient Instructions For patients who can understand instructions, the following information will help prepare them for the test. Inform them that: 1. You will insert the ear tip into the ear canal. 2. He/She will hear a series of sounds for a few seconds, up to a minute or so. 3. The test will be fastest and most accurate if the patient remains quiet throughout the entire test which will be brief, no more than a minute. That means no talking, minimal movement, and the patient
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Chapter 4: Care and Maintenance of the Probe Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E 12
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Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E 13
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Chapter 5: Quick Guides and Instructional Videos This section of the document presents Quick Guides, step-by step test procedures and other useful information. The Quick Guides: • List the steps required for performing an OAE test and for reviewing OAE data. • Present suggestions to help you use otoacoustic emissions to test infants, toddlers and preschoolers. • Explain conditions that could cause a Refer result for a Welch Allyn OAE Hearing Screener. One laminated copy of the Quick Gu
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Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E 15
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Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E 16
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Quick Guide: Causes of ‘Refer” rWelch Allyn OAE Hearing Screener Troubleshooting Quick Guide: Causes of Refer Results Noise Problem Possible solutions ♦ Noisy surroundings ♦ Eliminate or reduce noise — Isolate and completely sound-proof the test site (optimal). — Other people in or near test site. — Ask others in or near test site to refrain from talking or other — Devices such as fans, air activity. conditioners, intercoms, and — Ask noisy people to move to another location; ask
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Obstructions Problem Possible solutions ♦ IN THE EAR: ♦ Cerumen, vernix, or other debris — Make sure that a properly trained technician examines — In the ear the ear canal for obstructions BEFORE inserting the probe. — On the probe tip — Delay testing newborns until 11 hours after birth, if — On the probe possible. (Note: 'Refer' results caused by vernix decrease with each hour after birth.) ♦ ON THE PROBE TIP: — Remove, discard, and replace the probe tip before each test (
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Chapter 6: Welch Allyn OAE Hearing Screener Clinical Competency Evaluation and Result Letters The Welch Allyn OAE Hearing Screener Clinical Competency Evaluation is used for the Train the Trainer approach to learning the Welch Allyn OAE Hearing Screener. This evaluation can be used to ensure that new screeners are competent in using the Welch Allyn OAE Hearing Screener. This evaluation can also be used to document that training occurred and use of the Welch Allyn OAE Hearing Screene
