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. 2018 Jun;70(2):188-193.
doi: 10.1007/s12070-016-1004-2. Epub 2016 Jun 21.

A Preliminary Attempt to Profile Tympanometric Measures in Infants Using High Frequency Probe Tones

Krishna Yerraguntla  1 , Ramanjeet Kaur  2 , Rohit Ravi  1
Affiliations

A Preliminary Attempt to Profile Tympanometric Measures in Infants Using High Frequency Probe Tones

Krishna Yerraguntla et al. Indian J Otolaryngol Head Neck Surg. 2018 Jun.

Abstract

There is dearth of published data on high frequency tympanometric measures for infants in Indian context. Aim of present study was to profile Peak compensated static acoustic admittance (Ytm), Tympanometric peak pressure (TPP), Tympanometric width (TW) and Equivalent ear canal volume (Vea) in infants. Cross-sectional study on 50 infants with present TEOAEs and with risk indicators for hearing loss. Tympanometry was performed using GSI-Tympstar for 678 and 1000 Hz probe tones. Descriptive statistics were used to determine mean, SD and minimum and maximum for both genders. Using 678 Hz, Ytm ranged from 0.09 to 1. 48 mmho (males) and 0.11 to 1.14 mmho (females), while with 1000 Hz ranged from 0.15 to 1.49 (males) and 0.13-1.61 mmho (females). Using 678 Hz, TPP ranged from -95 to 70 daPa (males) and -155 to 80 daPa (females), while with 1000 Hz ranged from -75 to 95 daPa (males) and -145 to 50 daPa (females). Using 678 Hz, TW ranged from 30 to 190 daPa (males) and 40-23 daPa (females), while with 1000 Hz ranged from 60 to 210 daPa (males) and 40-183 daPa (females). Using 678 Hz, Vea ranged from 0.11 to 1.7 mmho (males) and 0.14-2.5 mmho (females), while with 1000 Hz ranged from 0.14 to 2.0 mmho (males) and 0.14-3.6 mmho (males). This study was a preliminary attempt to profile the tympanic measures. Ytm values were lesser or similar to other studies, TPP and Vea values had lower and narrow range, while TW were more than previous studies.

Keywords: Equivalent ear canal volume; High frequency tympanometry; Peak compensated static acoustic admittance; Tympanometric measures in infants; Tympanometric peak pressure; Tympanometric width.

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Conflict of interest statement

Compliance with Ethical StandardsThe authors reports of no conflict of interest and are solely responsible for the contents of this paper.Informed consent was obtained from the parents of infants prior to testing.This study does not involved any animal.

Figures

Fig. 1
Fig. 1
Risk indicator for hearing loss
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