otometrics ICS AirCal User Manual page 19

manufacturer default) will automatically be selected as indicated by the illumination of the green LED and the digital dis-
play. The actual temperature will flash until the set temperature is reached. It takes approximately 60 seconds for set tem-
perature to be reached when the unit is first turned on. When the set temperature is reached (±0.4°C), the actual
temperature display will stop flashing.
Using a regular otoscope or the delivery head with airflow turned off, examine the ear canal for the presence of cerumen
and also to determine how best to direct the airstream. The ear canal should be essentially free of cerumen. If it is not,
this must be removed prior to stimulating. Do not use water to remove cerumen as this will cause the temperatures in the
ear canal to be cooler than desired due to left over water in the ear canal.
Verify that the patient is positioned properly, in the supine position with head flexed 30º.
5.2 Testing Procedure
Perform each of the four irrigations as follows:
1. Verify that a new speculum has been placed on the delivery head.
2. Instruct the patient to keep eyes open (VNG) or closed (ENG).
3. Close goggles for VNG. Have patient close their eyes for ENG.
4. Start collecting response and start irrigation.
5. Start tasking patient 20-30 seconds into irrigation.
6. When duration time is reached the ICS AirCal will present a beep, remove the delivery head from the patient's ear
and continue tasking.
7. Right after the peak of the response, allow patient to fixate.
8. Collect eye movements until response subsides.
9. Dispose of the speculum and carefully place the delivery head in its cradle.
If the ICS AirCal is connected to an ICS VNG/ENG system, subsequent depressions of the flow time activation switch will
center the tracing for VNG/ENG or start the video recording for VNG. (If installed, the foot switch will also serve to start and
center tracings or start the video recording.)
Natus Medical – ICS® AirCal
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5 Performing a Caloric Irrigation
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