At235 Tympanometry Module; About The At235 Tympanometry Module; Preparing For The Test; Tympanometry Patient Instruction - Interacoustics AT235 Additional Information

AT235 Additional Information

1 AT235 Tympanometry Module

1.1 About the AT235 Tympanometry Module

The AT235, including Tympanometry Module, is an electro-acoustic test instrument that produces controlled
levels of test tones and signals intended for diagnostic hearing evaluations and assessment of possible
otologic disorders. It features tympanometry and acoustic reflex functions. It also measures various acoustic
properties of the ear, including complex acoustic impedance and admittance, and equivalent ear canal
volume. These measures enable evaluation of the functional condition of the middle and outer ear.
The target population for the AT235, including Tympanometry Module includes all ages.
The AT235 including Tympanometry Module is designed to be used only by skilled personnel such as
audiologists, ENT surgeons, doctors, hearing healthcare professionals or personnel with a similar level of
training and expertise. The device should not be used without the necessary knowledge and training in its
use and in how to interpret results.
The Tympanometry Module contains the following tests:
•
Tympanometry 226, 678, 800 and 1000Hz
•
Ipsilateral reflexes
•
Contralateral reflexes
•
Reflex decay
•
Reflex latency
•
Eustachian tube function – non-perforated
•
Eustachian tube function – perforated
•
Eustachian tube function – patulous
Availability of these tests or specific settings within these tests on the hardware or in the software will vary
depending on the license purchased.

1.2 Preparing for the Test

1.2.1

Tympanometry patient instruction

Place the patient on a comfortable chair or, if necessary, on an examination table. Younger children may feel
more comfortable sitting on a parent's or nurse's lap. Show the probe to the patient and then explain the
following:
•
The aim of the test is to assess the mobility of the eardrum
•
The tip of the probe will be inserted into the ear canal and has to make a perfect seal
•
A small amount of air will flow through the probe to move the eardrum; it produces a sensation
similar to pressing a finger slightly into the ear canal
•
One or more tones will be heard during the test
•
No active participation is expected from the patient
•
Coughing, talking and swallowing will disturb test results
1.2.2

Visual inspection of the ear canal

Check the external ear canal for wax with an otoscope and remove any excessive wax to prevent the probe
opening from clogging, as this would inhibit testing. Excessive hairs may have to be cut.
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