Tympanometric and Acoustic-Reflex Studies in Neonates

Sprague, Barbara H.; Wiley, Terry L.; Goldstein, Robert E.

doi:10.1044/jshr.2802.265

Cited by 61 publications

(46 citation statements)

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“…7 Other studies also proved a Double Peak tympanogram, explaining such occurrence based on the fact that the neonate auditory system is ruled by the mass effect. 20 If we consider a purely neonatal age range, the rate of Double peak tympanograms increases considerably (52.3%). 5 In the group of infants without TEOAEs, there was a higher rate of tympanogram alterations as presented on Table 5.…”

Section: Discussionmentioning

confidence: 99%

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Linares

Carvallo

2008

Rev. Bras. Otorrinolaringol.

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Consi dering the hypothesis that middle ear changes can impair the recording of otoacoustic emissions, it is possible that absent otoacoustic emissions in infants could be associated with a light tympanometric change. Aim: To study the association between transient otoacoustic emissions and changes in acoustic immittance measurements with 226Hz probe tone in neonates. Methods: Cross-sectional contemporary cohort study. 20 infants with no transient otoacoustic emissions (study group) and 101 infants with transient otoacoustic emissions (control group), with ages ranged from birth to eight months, were assessed. Infants were submitted to: admittance tympanometry; contralateral acoustic reflex threshold with stimulus of 0.5, 1, 2, 4 kHz and broad band noise; transient and distortion product otoacoustic emissions. The auditory brain response was used to study the threshold in neonates without transient otoacoustic emissions. Results: Significant statistical differences were observed between the groups (p < 0.005), characterized by reduction in tympanometric configuration and increase acoustic reflex thresholds in the study group. These data suggest the occurrence of middle ear mild impairment in infants without transient otoacoustic emissions associated with normal auditory brain response. Conclusion: tympanometry associated with acoustic reflex adds accuracy to the diagnosis of middle ear abnormalities.

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Section: Discussionmentioning

confidence: 99%

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Linares

Carvallo

2008

Rev. Bras. Otorrinolaringol.

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“…For example, Weatherby and Bennett (1980) recommended frequencies between 0.8 and 1.8 kHz for ASR testing in neonates. ASR responses were measured using both BBN and 1-kHz activators in infants of age 1 to 6 days, and ASR shifts were observed in most infants (Sprague et al 1985). ASRTs vary with the reference frequency used in newborns (McMillan et al 1985), which suggests that a multi-frequency test may be more sensitive than a single-frequency test, unless one knows beforehand which reference frequency gives the largest ASR shift.…”

Section: Introductionmentioning

confidence: 99%

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Keefe

Feeney

Hunter

et al. 2016

JARO

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Power-based procedures are described to measure acoustic stapedius-muscle reflex threshold and supra-threshold responses in human adult and infant ears at frequencies from 0.2 to 8 kHz. The stimulus set included five clicks in which four pulsed activators were placed between each pair of clicks, with each stimulus set separated from the next by 0.79 s to allow for reflex decay. Each click response was used to detect the presence of reflex effects across frequency that were elicited by a pulsed broadband-noise or tonal activator in the ipsilateral or contralateral test ear. Acoustic reflex shifts were quantified in terms of the difference in absorbed sound power between the initial baseline click and the later four clicks in each set. Acoustic reflex shifts were measured over a 40-dB range of pulsed activators, and the acoustic reflex threshold was objectively calculated using a maximum 10 likelihood procedure. To illustrate the principles underlying these new reflex tests, reflex shifts in absorbed sound power and absorbance are presented for data acquired in an adult ear with normal hearing and in two infant ears in the initial and follow-up newborn hearing screening exams, one with normal hearing and the other with a conductive hearing loss. The use of absorbed sound power was helpful in classifying an acoustic reflex shift as present or absent. The resulting reflex tests are in use in a large study of wideband clinical diagnosis and monitoring of middle-ear and cochlear function in infant and adult ears.

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“…The record of uncrossed initiated re lex is the same in shape, to an uncrossed initiated one of intact persons [25,29,31]. Thresholds of ipsilateral re lex are signi icantly lower than ones of contralateral re lex [25,29,[32][33][34][35]. Ipsilateral stimulated re lex has in most cases higher amplitude than collateral re lex [25,29,34].…”

Section: External Conditionsmentioning

confidence: 99%

“…Wide band noise initiates stapedial re lex at a lower initiating level of intensity [2,3,24,28,35,51,53]. Wurzer, et al [28], states that the noise threshold can be lower than the threshold with tonal stimulus by 20-25 dB.…”

Section: Stimulation Length (Time)mentioning

confidence: 99%

Impedance audiometry: Stapedial reflex eliciting conditions

Lejska¹

2017

Heighpubs Otolaryngol and Rhinol

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SummaryThe work is an attempt to create a complete system of conditions which infl uence genesis, existence, and response characteristics of stapedial refl ex in impedance audiometry. The author divides the conditions into the internal-refl ex arc integrity, temporal acoustic summation, mixed-external auditory meatus and middle ear, and internal-side of stimulation and energy content of the stimulus. The system of conditions that infl uence stapedial refl ex is based on a criterion, that stapedial refl ex depends on energy, which is percepted by the inner ear as subjective loudness. The system of conditions stated in this work is based mainly on the author's own experiments and measurements, which are herein also documented. At the same time, these results are in accordance with data in literature as quoted. This system is not closed-it potentially may be completed using the basic criterion and further knowledge.

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Tympanometric and Acoustic-Reflex Studies in Neonates

Cited by 61 publications

References 0 publications

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Impedance audiometry: Stapedial reflex eliciting conditions

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