Interacoustics ASSR Instrucciones De Uso página 7

Date: 2009-09-01
Preparations prior to the ASSR Test
For obtaining reliable and valid test results it is most important that the patient is well prepared for the
test.
Preparation of the Skin
It is very important to clean the skin where the electrodes are to be placed in order to obtain an
acceptable low skin impedance.
1. Clean the skin thoroughly with the skin preparation gel.
2. Wash off the gel with alcohol before applying the electrodes.
Placement of Electrodes
Place an electrode on each mastoid or earlobe, one at vertex (or hair-line) (for white connector) and
one on the cheek (for black connector). Connect all four electrode leads.
Insertion of the insert earphones
Make sure that the end of the black tube is not occluded by the yellow foam when you roll the insert
earphone tip into the smallest diameter possible.
Insert the tip well into the ear canal. The correct insertion depth into the ear canal is obtained when the
rear edge of the insert earphone is 1-2 mm inside the entrance of the ear canal.
Hold the insert earphone in the ear canal until expanded.
Use a new pair of ear tips for each patient.
Impedance Check
After having attached the electrodes to the patient it is crucial to check the skin impedance. For best
results, impedance at each electrode should be as low as possible, preferably 3 kΩ or less.
Return to ERA mode by clicking IMP button.
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ASSR Instructions for Use – English
Operation Instruction
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