Busy. Please wait.
Log in with Clever
or

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever
or

Username is available taken
show password

Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Audiology PowerPoint 5

        Help!  

Question
Answer
The main principles of tympanometry are to:   show
🗑
show the pressure in the environment / external auditory meatus is the same as in the middle-ear cavity / Eustachian tube  
🗑
show there is reduced transmission of the sound through the tympanic membrane / middle-ear space  
🗑
Impedance   show
🗑
compliance   show
🗑
show the amount of compliance and impedance  
🗑
show device delivers a tone to a sealed volume (EAM) and detect the sound level changes as the pressure is varied  
🗑
The pressure pump (function)...   show
🗑
show introduces a pure tone (220 Hz)  
🗑
The microphone (function)...   show
🗑
If the tympanic membrane is hit by a sound...   show
🗑
show 1) The probe tip is inserted into the external auditory canal to make a tight seal, 2)A pure tone is delivered to the external auditory meatus, 3) The pump decreases the ear canal pressure to ~ -200 daPa, then increases the pressure to ~ +200 daPa,  
🗑
If the TM is stiff, the peak of compliance...   show
🗑
If hyper flaccid, the peak of compliance...   show
🗑
show a graphic representation of the relationship between pressure within the external auditory meatus vs. compliance of the middle ear  
🗑
Compliance is maximal when...   show
🗑
Pressure in the external auditory meatus is varied from _________________ while monitoring compliance   show
🗑
+ pressure variation means you are...   show
🗑
- pressure variation means you are...   show
🗑
show maximal mobility  
🗑
normal range of compliance   show
🗑
show small compliance --> high resistance --> system is stiff  
🗑
show high compliance --> low resistance --> system is hyperflaccid  
🗑
show the pressure at which pressure equalization occurs on both sides of the tympanic membrane. It also indicates the pressure at which peak compliance or maximum mobility is attained.  
🗑
show -150 to 100 daPa  
🗑
show indicative of poorly functioning Eustachian tube or possibly some fluid.  
🗑
Extreme positive pressures   show
🗑
show indicates the range of pressure peak and compliance peak values associated with normal middle-ear function  
🗑
show A, B, and C  
🗑
Type A   show
🗑
show Represents a stiff ME: shallow curve w/ normal ME air pressure but reduced mobility-->suggests limited mobility of the TM and ME structure, commonly seen in fixation of the ossicular chain (e.g., otosclerosis).  
🗑
show Represents hypermobile or hyperflaccid ME: deep curve with normal ME pressure but tall peak of abnormally compliant ME ->indicative of a flaccid TM due to disarticulation of the ossicular chain, loss of elastic fibers in the TM, thin TM  
🗑
Type B   show
🗑
show represents significant negative pressure in the middle ear cavity: normal compliance but the peak compliance is significantly below zero, indicating negative pressure in the ME space. This curve is usually typical of Eustachian tube dysfunctions.  
🗑
Normal adult range of EAM volume   show
🗑
show you cannot accurately measure the compliancy or pressure  
🗑
If EAM volume is > 2ml, due to...   show
🗑
If EAM volume is <0.6, due to...   show
🗑


   

Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
 
To hide a column, click on the column name.
 
To hide the entire table, click on the "Hide All" button.
 
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
 
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.

 
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how
Created by: 100000299709410
Popular Clinical Skills sets