A Preliminary Attempt to Profile Tympanometric Measures in Infants Using High Frequency Probe Tones (original) (raw)
Related papers
2018
Background and Aim: Middle ear of neonates is mass-dominant. Therefore, by increasing the frequency of probe tone from 226 Hz to 1000 Hz, middle ear abnormalities can be detected better. This study aimed to evaluate the effect of age, sex, ear and weight on the characteristics of 1000 Hz tympanometry in neonates. Methods: A total of 255 neonates (136 boys and 119 girls) aged from 1 to 90 days, with normal transient evoked otoacoustic emissionat least in one ear were studied. Compensated static admittance at middle ear pressure (YPP) and admittance at pressure of +200 daPa (Y200) were measured with 1000 Hz tympanometry. Results: Mean (SD) YPP and Y200 values were 0.97 (0.48) and 2.07 (0.46) mmho in the right ears and 0.98 (0.53) and 2.05 (0.48) mmho in the left ears, respectively. In both ears, gender had no significant effect on compensated YPP, but Y200 values were significantly different between girls and boys (p<0.05). Ear did not affect the YPP and Y200 values. There was also a linear relationship between age and weight
International Archives of Otorhinolaryngology, 2013
Introduction For infants under 6 months, the literature recommends 1,000-Hz tympanometry, which has a greater sensitivity for the correct identification of middle ear disorders in this population. Objective To systematically analyze national and international publications found in electronic databases that used tympanometry with 226-Hz and 1,000-Hz probe tones. Data Synthesis Initially, we identified 36 articles in the SciELO database, 11 in the Latin American and Caribbean Literature on the Health Sciences (LILACS) database, 199 in MEDLINE, 0 in the Cochrane database, 16 in ISI Web of Knowledge, and 185 in the Scopus database. We excluded 433 articles because they did not fit the selection criteria, leaving 14 publications that were analyzed in their entirety. Conclusions The 1,000-Hz tone test has greater sensitivity and specificity for the correct identification of tympanometric curve changes. However, it is necessary to clarify the doubts that still exist regarding the use of this test frequency. Improved methods for rating curves, standardization of normality criteria, and the types of curves found in infants should be addressed.
The role of high frequency tympanometry in newborn hearing screening programme
European review for medical and pharmacological sciences, 2012
The hearing assessment of the newborns ideally should detect both middle and inner ear functions. The aim of this study is to control the association between otoscopic evaluation, multifrequency tympanometry and TEOAE results. Fifty new-borns otherwise healthy were tested after the otolaryngological evaluation by 226 and 1000 Hz tympanometries and transient evoked otoacoustic emissions (TEOAE's). The study was performed in three steps and 17 babies that could not pass from the first step they were tested in the second step with the same tests (226 Hz and 1000 Hz tympanometry and TEOAE) The babies that could not pass from the second step were evaluated by multifrequency tympanometries, TEOAE and acoustic brainstem responses (ABR) at the third step. The association between the results obtained from otoscopic evaluation, multifrequency tympanometry and TEOAE were assessed. We found that 1000 Hz tympanometry results were more sensitive and gives more correlated with TEOAE and otosco...
Wideband tympanometry and otoacoustic emissions in children with risk factors for hearing loss
Research, Society and Development
Introduction: Wideband tympanometry and evoked otoacoustic emissions can help audiologically monitor children birth to 3 years old, with or without risk factors for hearing loss. Objective: To study wideband tympanometry results in acoustic absorbance measures and transient evoked and distortion-product otoacoustic emission records during audiological monitoring. Method: This prospective observational study encompassed 58 children with and without risk indicators for hearing loss, with a mean age of 16.7 months. Data were obtained from the databases of four public maternity hospitals in São Paulo. Subjects were characterized as normal hearing or conductive hearing loss in the groups with and without risk factors for hearing loss. Results: Wideband absorbance at 1000 to 8000 Hz was verified to correlate the absorbance level with the transient evoked and distortion-product otoacoustic emission response levels at 1000 to 8000 Hz and wideband tympanometry. Normal hearing individuals’ ab...
This paper aimed at evaluating the characteristics of highfrequency (1,000 Hz) acoustic admittance (ya) for the neonates with transient evoked otoacoustic emissions (TEOAE) as either pass or refer group. Subjects and Methods: Using a 1,000 Hz probe tone, 297neonates (152 male, 145 female aged 0-104 days old) were evaluated. Tympanometric parameters admittance value at +200 dapa, middle ear admittance, and tympanometric peak pressure were calculated for each tympanogram. Results: The mean of ya was 0.9678 mmho in the TEOAE for the pass group and 0.7229 mmho in the refer group. The mean of acoustic admittance at +200 (y200) was 2.0657 in the TEOAE for the pass group and 1.7191 for the refer group. The mean of Tpp was 23/8591 in the TEOAE for the pass group and 59/7619 for the refer group. Conclusions: There were significant differences in the distribution of different types of tympanograms, the mean of ya, tympanic peak pressure, and y200 between the TEOAEs for the pass and the refer groups.
Effects of maturation on tympanometric wideband acoustic transfer functions in human infants
The Journal of the Acoustical Society of America, 2008
Wideband acoustic transfer function ͑ATF͒ measurements of energy reflectance ͑ER͒ and admittance magnitude ͉͑Y͉͒ were obtained at varying static ear-canal pressures in 4-, 12-, and 27-week-old infants and young adults. Developmental changes in wideband ATF measurements varied as a function of frequency. For frequencies from 0.25 to 0.75 kHz there was as much as a 30% change in mean ER and ͉Y͉ with changes in static ear-canal pressure between 4 and 24 weeks of age. From 0.75 to 2 kHz, the effects of pressure produced a small number of significant differences in ER and ͉Y͉ with age, suggestive of a developmentally stable frequency range. Between 2 and 6 kHz, there were differential effects of pressure for the youngest infants; negative pressures caused increased ER and ͉Y͉ and positive pressures caused decreased ER and ͉Y͉; the magnitude of this effect decreased with age. Findings from this study demonstrate developmental differences in wideband tympanometric ATF measurements in 4-, 12-and 24-week-old infants and provide additional insight on the effects of static ear-canal pressure in the young infant's ear. The maturational effects shown in the experimental data are discussed in light of known age-related anatomical changes in the developing outer and middle ear.
Multifrequency Tympanometry in Neonatal Intensive Care Unit and Well Babies
Journal of the American Academy of Audiology, 2008
Background: Conventional low probe tone frequency tympanometry has not been successful in identifying middle ear effusion in newborn infants due to differences in the physiological properties of the middle ear in newborn infants and adults. With a rapid increase in newborn hearing screening programs, there is a need for a reliable test of middle ear function for the infant population. In recent years, new evidence has shown that tympanometry performed at higher probe tone frequencies may be more sensitive to middle ear disease than conventional low probe tone frequency in newborn infants.