FP01-5. USEFULNESS OF VIDEO PNEUMATIC OTOSCOPE IN THE EVALUATION OF OTITIS MEDIA WITH EFFUSION

Yang-Sun Cho, Dong Kyung Lee, Sung Hwa Hong (Sungkyunkwan University, Samsung Medical Center), Chi Kyou Lee (Soonchyunhyang University), Won Ho Chung
(Sungkyunkwan University, Samsung Medical Center, Korea)

Objectives: To evaluate the diagnostic significance of video pneumatic otoscope (VPO) in otitis media with effusion (OME) and to find out helpful parameters of VPOMethods: We examined 23 ears in 14 patients. Seven were women and another seven were men, with a mean age of 20.4 years. Otoscopic examination revealed full OME in twelve ears, partial in eight. Three ears were free of OME at the time of testing. All patients underwent high resolution temporal bone CT for the diagnosis and quantitative analysis of middle ear effusion. By 3-dimensional volumetry, we calculated the percentage of volume of the effusion in the middle ear cavity and mastoid air cells. We performed video recordings of VPO in all patients. We also calculated average minimal pressure and maximal pressures of the external auditory canal which is enough for triggering the tympanic membrane motion. We also obtained static image of the tympanic membrane at maximal inflation and deflation stage, respectively. Each measured distance and angle between various landmarks in the tympanic membrane, and the change of such variables during the deflation and inflation stage were analyzed using Pearson’s correlation

Results: The minimal pressure of the tympanic membrane (p<0.001), change in the length between the posterior annulus and the umbo (p=0.04) during the inflation and deflation stagee length of the posterior 1/4 of the tympanic membrane (p=0.01) showed statistical correlation with the percentage of volume of the effusion, obtained by CT. However, the change of the length of the malleolar handle and the change of angle between the malleolar fold and the malleal handle did not show any statistical correlation between the percentages of effusion.

Conclusions: Our study revealed that VPO is a useful diagnostic method for otitis media with effusion. Minimal pressure of the external auditory canal and the visual analysis of the movement of the tympanic membrane can exactly reflect the extent of the fluid in the middle ear cavity and the mastoid.

 
* Contact person email: yscho@smc.samsung.co.kr