Multifrequency typmanometry in neonatal intensive care unit and well babies.
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...
| Publicado en: | Journal of the American Academy of Audiology Vol. 19; no. 5; pp. 392 - 419 |
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| Autores principales: | , , |
| Formato: | case study equations & formulas pictorial research tables/charts tracings Journal Article |
| Publicado: |
Thieme Medical Publishing Inc.
May2008
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105615931&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105615931 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10500545 9OC jtl: Journal of the American Academy of Audiology issn: 10500545 maglogo: Y pubinfo: dt: May2008 vid: 19 iid: 5 pid: 2811 pub: Thieme Medical Publishing Inc. place: New York, New York artinfo: ui: 105615931 35966098 2010155544 10.3766/jaaa.19.5.3 NLM19253812 105615931 ppf: 392 ppct: 27 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Multifrequency typmanometry in neonatal intensive care unit and well babies. aug: au: Shahnaz N Miranda T Polka L affil: School of Audiology and Speech Sciences, Faculty of Medicine, University of British Columbia; nshahnaz@audiospeech.ubc.ca sug: subj: Acoustic Impedance Tests Methods Ear, Middle Physiology Hearing Screening Intensive Care Units, Neonatal Otitis Media with Effusion Diagnosis Adult Analysis of Variance British Columbia Comparative Studies Descriptive Statistics Evoked Potentials, Auditory, Brainstem Funding Source Gestational Age Hearing Loss, Conductive Diagnosis Hearing Loss, Sensorineural Diagnosis Infant Infant, High Risk Infant, Newborn Infant, Premature Otoacoustic Emissions, Evoked Sensitivity and Specificity T-Tests Human Adult: 19-44 years Infant: 1-23 months Infant, Newborn: birth-1 month ab: 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. Purpose: The main goal of this study was to explore the characteristics of the normal middle ear in the NICU (neonatal intensive care unit) and well babies using conventional and multifrequency tympanometry (MFT). It was also within the scope of this study to compare conventional and MFT patterns in NICU and well babies to already established patterns in adults to identify ways to improve hearing assessment in newborns and young infants. Methods: Three experiments were conducted using standard and MFT involving healthy babies and NICU babies. NICU babies (n = 33), healthy three-week-old babies (n = 16), and neonates on high priority hearing registry (HPHR) (n = 42) were tested. Thirty-two ears of 16 healthy Caucasian adults (compared to well-babies) and 47 ears of 26 healthy Caucasian adults (compared to NICU babies) were also included in this study. Results: The distribution of the Vanhuyse patterns as well as variation of admittance phase and peak compensated susceptance and conductance at different probe tone frequencies was also explored. In general, in both well babies and NICU babies, 226 Hz tympanograms are typically multipeaked in ears that passed or referred on transient otoacoustic emission (TEOAE), limiting the specificity and sensitivity of this measure for differentiating normal and abnormal middle ear conditions. Tympanograms obtained at 1 kHz are potentially more sensitive and specific to presumably abnormal and normal middle ear conditions. Tympanometry at 1 kHz is also a good predictor of presence or absence of TEOAE. pubtype: Academic Journal doctype: case study equations & formulas pictorial research tables/charts tracings Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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