Welch Allyn MicroTymp 3 portable tympanometric instrument - User Manual - Manual (Page 34)

34 Interpreting test results Welch Allyn MicroTymp3 portable tympanometric instrument
Tympanogram with low Peak Ya
Conditions which cause tympanograms with reduced peak height (low Peak Ya):
• Otitis media with effusion
• Tympanosclerosis
• Cholesteatoma
• Middle ear tumor
See Appendix A for descriptions of low-admittance pathologies: otitis media with effusion,
middle ear tumor, ossicular fixation, and otosclerosis.
High admittance tympanograms
Tympanogram with high Peak Ya
Conditions which cause tympanograms with increased peak height (high Peak Ya):
• Tympanic membrane abnormalities
• Ossicular disruption
See Appendix A for a description of tympanic membrane abnormalities and ossicular
disruption.
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
L
Note When peak admittance exceeds 1.5 mmho, data points will be printed at baseline
(0.0 mmho), as shown above.
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
RIGHT EAR
R
High Peak Ya