Tympanogram
What type? Normal middle ear pressure and normal compliance
Type A
What muscle contracts during ART?
Stapedius muscle
What instructions should be given to patient when conducting reflex decay?
You will hear a loud sound but don't need to respond. Please remain still and quiet.
What type? Normal middle ear pressure and increased compliance
Type Ad
What are the two types of ARTs?
ipsilateral and contralateral
What does reflex decay measure?
how well/how long the stapedius muscle can remain contracted when the stimulus is continuous
What type? Abnormal middle ear pressure and abnormal compliance
Type B
Why do we have acoustic reflexes?
prevent loud sounds from damaging our ears/hearing
Reflex decay is measured at 500 and 1,000 Hz at 10 dB SL (re: ________ ARTs)
Contralateral
What type? Negative pressure and normal compliance
Type C
What type of reflex? Stimulus in presented in the RIGHT ear and measured in the RIGHT ear
Right ipsilateral ART
What is the desired response?
Negative decay
What three things are measured on a tympanogram?
Compliance, Ear canal volume, ME pressure
What type of reflex? Stimulus is presented in the LEFT ear and measured in the RIGHT ear
Left contralateral ART
What should you do if you see a positive decay and what can a positive decay be indicative of?
Refer to ENT; retrocochlear pathology