| Titre : | Refining Measurements of Power Absorbance in Newborns: Probe Fit and Intrasubject Variability (2021) |
| Auteurs : | Hammam A. AlMakadma ; Beth A. Prieve |
| Type de document : | Article |
| Dans : | Ear and hearing (Vol. 42, n°3, Mai- Juin 2021) |
| Article en page(s) : | p. 531-546 |
| Langues: | Anglais |
| Descripteurs : |
HE Vinci Absorbance acoustique ; Dépistage précoce de la surdité ; Nouveau-né ; Wideband absorbance (WBA)Autres descripteurs Test retest |
| Résumé : |
Objectives: Because unresolved debris in the ear canal or middle ear of newborns may produce high false positive rates on hearing screening tests, it has been suggested that an outer/middle ear measure can be included at the time of hearing screening. A potential measure is power absorbance (absorbance), which indicates the proportion of power in a broadband acoustic stimulus that is absorbed through the outer/middle ear. Although absorbance is sensitive to outer/middle dysfunction at birth, there is large variability that limits its accuracy. Acoustic leaks caused by poor probe fitting further exacerbate this issue. The objectives of this work were to: (1) develop criteria to indicate whether a change in absorbance occurs in association with probe fit; (2) describe the variability in absorbance due to poor fitting; and (3) evaluate test-retest variability with probe reinsertions, excluding poor fits.
Design: An observational cross-sectional design was used to evaluate changes in absorbance due to probe fit and probe reinsertion. Repeated measurements were recorded in 50 newborns (98 ears) who passed TEOAE screenings and were Results: Based on the analysis of 12 moderate-strong correlations, the following criteria were adopted to identify measurements with poor fits: (1) impedance phase-based criterion (500 to 1000 Hz) > -0.11 cycles and (2) absorbance-based criterion (250 to 1000 Hz) > 0.58. Poor-fit measurements introduced statistically significant increases in absorbance up to 0.1 for 1000 to 6000 Hz, and up to 0.4 for frequencies Conclusions: Poor probe fits introduced the greatest inflation in absorbance for frequencies |
| Disponible en ligne : | Oui |
| En ligne : | https://login.ezproxy.vinci.be/login?url=https://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&D=yrovftw&AN=00003446-202105000-00005 |
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