OBJECTIVES This study aims to investigate the effects of adenoid hypertrophy on negative middle ear pressure and diagnostic efficiency of tympanogram in the detection of otitis media with effusion in children without parental suspicion of hearing loss. PATIENTS AND METHODS Fifty-six children (26 boys, 30 girls; mean age 5.9±2.2 years; range, 3 to 12 years) who underwent adenoidectomy were ana...

OBJECTIVE To determine the reliability, validity, and feasibility of a new hand held microtympanometer. DESIGN Comparison of microtympanometry by two independent observations of a general practitioner and a nurse, and against a validated reference instrument. SETTING Primary care health centre of a school for the deaf in the United States. SUBJECTS 111 schoolchildren receiving a regular c...

Acoustic reflex is a sensitive indicator of middle ear lesions when the tympanic membrane is intact and tympanometry is normal. Acoustic reflex is not usually observed in conductive hearing loss caused by disruption of the ossicular chain including ossicular discontinuity and fixation. Ossicular disruption can show at least partially intact acoustic reflex under a certain condition. Moreover, o...

OBJECTIVES To develop normative data for wideband middle-ear reflectance in a newborn hearing-screening population and to compare test performance with 1-kHz tympanometry for prediction of otoacoustic emission (OAE) screening outcome. DESIGN Wideband middle-ear reflectance (using both tone and chirp stimuli from 0.2 to 6 kHz), 1-kHz tympanometry, and distortion-product (DP) OAEs were measured...

The diagnostic role of audio-impedancemetry in superior semicircular canal dehiscence (SSCD) disease is well known. In particular, since the first reports, the presence of evoked acoustic reflexes has represented a determining instrumental exhibit in differential diagnosis with other middle ear pathologies that are responsible for a mild-low frequencies air-bone gap (ABG). Even though high reso...