scholarly journals Auditory brainstem response in neonates: influence of gender and weight/gestational age ratio

2013 ◽  
Vol 31 (4) ◽  
pp. 494-500 ◽  
Author(s):  
Rosanna M. Giaffredo Angrisani ◽  
Ana Paula D. Bautzer ◽  
Carla Gentile Matas ◽  
Marisa Frasson de Azevedo
Keyword(s):  
Preterm Infants ◽  
Gestational Age ◽  
Auditory Brainstem Response ◽  
Otoacoustic Emissions ◽  
Auditory Brainstem ◽  
Term Infants ◽  
Age Ratio ◽  
Appropriate For Gestational Age ◽  
Brainstem Response ◽  
Interaural Differences

OBJECTIVE: To investigate the influence of gender and weight/gestational age ratio on the Auditory Brainstem Response (ABR) in preterm (PT) and term (T) newborns. METHODS: 176 newborns were evaluated by ABR; 88 were preterm infants - 44 females (22 small and 22 appropriate for gestational age) and 44 males (22 small and 22 appropriate for gestational age). The preterm infants were compared to 88 term infants - 44 females (22 small and 22 appropriate for gestational age) and 44 males (22 small and 22 appropriate for gestational age). All newborns had bilateral presence of transient otoacoustic emissions and type A tympanometry. RESULTS: No interaural differences were found. ABR response did not differentiate newborns regarding weight/gestational age in males and females. Term newborn females showed statistically shorter absolute latencies (except on wave I) than males. This finding did not occur in preterm infants, who had longer latencies than term newborns, regardless of gender. CONCLUSIONS: Gender and gestational age influence term infants' ABR, with lower responses in females. The weight/gestational age ratio did not influence ABR response in either groups.

scholarly journals Auditory pathway maturational study in small for gestational age preterm infants

CoDAS ◽  
2014 ◽  
Vol 26 (4) ◽  
pp. 286-293 ◽  
Author(s):  
Rosanna Giaffredo Angrisani ◽  
Edna Maria Albuquerque Diniz ◽  
Ruth Guinsburg ◽  
Alexandre Archanjo Ferraro ◽  
Marisa Frasson de Azevedo ◽  
...  
Keyword(s):  
Preterm Infants ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Otoacoustic Emissions ◽  
Newborn Infants ◽  
Tone Burst ◽  
Auditory Pathway ◽  
Auditory Brainstem ◽  
Cross Sectional ◽  
Brainstem Response

PURPOSE: To follow up the maturation of the auditory pathway in preterm infants small for gestational age (SGA), through the study of absolute and interpeak latencies of auditory brainstem response (ABR) in the first six months of age.METHODS: This multicentric prospective cross-sectional and longitudinal study assessed 76 newborn infants, 35 SGA and 41 appropriate for gestational age (AGA), born between 33 and 36 weeks in the first evaluation. The ABR was carried out in three moments (neonatal period, three months and six months). Twenty-nine SGA and 33 AGA (62 infants), between 51 and 54 weeks (corrected age), returned for the second evaluation. In the third evaluation, 49 infants (23 SGA and 26 AGA), with age range from 63 to 65 weeks (corrected age), were assessed. The bilateral presence of Transient Evoked Otoacoustic Emissions and normal tympanogram were inclusion criteria.RESULTS: It was found interaural symmetry in both groups. The comparison between the two groups throughout the three periods studied showed no significant differences in the ABR parameters, except for the latencies of wave III in the period between three and six months. As for the maturation with tone burst 0.5 and 1 kHz, it was found that the groups did not differ.CONCLUSION: The findings suggest that, in the premature infants, the maturational process of the auditory pathway occurs in a similar rate for SGA and AGA. These results also suggest that prematurity is a more relevant factor for the maturation of the auditory pathway than birth weight.

Auditory Brainstem Response in Preterm Infants in the Neonatal Intensive Care Unit

2020 ◽  
pp. 019459982095518
Author(s):  
Diogo Raposo ◽  
João Orfão ◽  
Marco Menezes ◽  
Mafalda Trindade-Soares ◽  
Ana Guimarães ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Mechanical Ventilation ◽  
Intensive Care ◽  
Preterm Infants ◽  
Auditory Brainstem Response ◽  
Neonatal Intensive Care ◽  
Auditory Brainstem ◽  
Term Infants ◽  
Congenital Cytomegalovirus ◽  
Brainstem Response

Objective To analyze auditory brainstem response (ABR) findings of preterm and term infants in the neonatal intensive care unit (NICU) with perinatal problems. Study Design Case series with chart review. Setting Secondary care hospital. Methods Analysis consisted of a consecutive series of 101 infants (69 preterm and 32 term) admitted in the NICU of Hospital Fernando Fonseca between 2016 and 2018 with perinatal problems who underwent an ABR evaluation. Results The major perinatal problems identified were hyperbilirubinemia, intravenous gentamicin >5 days, mechanical ventilation >5 days, congenital cytomegalovirus infection, meningitis, and periventricular hemorrhage. Gentamicin use significantly increased the absolute latency of wave I in preterm infants (95% CI, 0.01-0.37; P = .037). Mechanical ventilation significantly decreased the latency of wave V and intervals I-V and III-V in preterm infants (95% CI, −0.35 to −0.22; P = .026; 95% CI, −0.33 to −0.00; P = .001; 95% CI, −0.46 to 0.12; P = .049). Congenital cytomegalovirus significantly decreased interval III-V in preterm infants (95% CI, −0.36 to −0.01; P = .042). Multivariate analysis revealed that gentamicin use, lower gestational age, and lower birth weight predicted an increased ABR threshold in preterm infants (95% CI, 1.64-15.31; P = .016; 95% CI −1.72 to −0.09; P = .030; 95% CI, −14.55 to −0.63; P = .033). ABR measurements in term infants were not significantly altered, with the exception of an increased latency of wave III with a lower gestational age (95% CI, −0.49 to −0.01; P = .038). Conclusions These findings suggest that perinatal problems in the NICU significantly impair the ABR threshold and the auditory pathway maturational process in preterm but not term infants.

Auditory steady state response in auditory neuropathy

2010 ◽  
Vol 124 (9) ◽  
pp. 950-956 ◽  
Author(s):  
A A Emara ◽  
T A Gabr
Keyword(s):  
Steady State ◽  
Auditory Brainstem Response ◽  
Otoacoustic Emissions ◽  
Hearing Threshold ◽  
Auditory Brainstem ◽  
Auditory Neuropathy ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response ◽  
Brainstem Response

AbstractReview:Auditory neuropathy is a disorder characterised by preservation of outer hair cell function, with normal otoacoustic emissions and/or cochlear microphonics, but an absent or distorted auditory brainstem response.Purpose:This study aimed to objectively assess hearing thresholds in patients with auditory neuropathy, using the auditory steady state response.Materials and methods:Thirteen patients with auditory neuropathy and 15 normal hearing subjects were examined. Audiological evaluation included basic audiological tests, otoacoustic emissions, auditory brainstem response and auditory steady state response.Results:In the auditory neuropathy patients, the auditory brainstem response was absent in 11 patients, while the auditory steady state response was absent in only three.Conclusion:The auditory steady state response may serve as a valuable objective measure for assessing the hearing threshold across different frequencies in patients with auditory neuropathy. We recommend that auditory steady state response be used to complete the evaluation of patients with auditory neuropathy.

scholarly journals Auditory brainstem response demonstrates that reduced peripheral auditory input is associated with self-report of tinnitus

2019 ◽  
Author(s):  
Naomi Bramhall ◽  
Garnett McMillan ◽  
Frederick Gallun ◽  
Dawn Konrad-Martin
Keyword(s):  
Animal Models ◽  
Auditory Brainstem Response ◽  
Otoacoustic Emissions ◽  
Auditory Brainstem ◽  
Self Report ◽  
Auditory Input ◽  
Distortion Product ◽  
Brainstem Response ◽  
Temporal Bones ◽  
The Relationship

Tinnitus is one of the predicted perceptual consequences of cochlear synaptopathy, a type of age-, noise-, or drug-induced auditory damage that has been demonstrated in animal models to cause homeostatic changes in central auditory gain. Although synaptopathy has been observed in human temporal bones, assessment of this condition in living humans is limited to indirect non-invasive measures such as the auditory brainstem response (ABR). In animal models, synaptopathy is associated with a reduction in ABR wave I amplitude at suprathreshold stimulus levels. Several human studies have explored the relationship between wave I amplitude and tinnitus, with conflicting results. This study investigates the hypothesis that reduced peripheral auditory input due to synaptic/neuronal loss is associated with tinnitus. ABR wave I amplitude data from 193 individuals (43 with tinnitus (22%), 150 without tinnitus (78%)), who participated in up to three out of four different studies, were included in a logistic regression analysis to estimate the relationship between wave I amplitude and tinnitus at a variety of stimulus levels and frequencies. Statistical adjustment for sex and distortion product otoacoustic emissions was included in the analysis. The results suggest that smaller ABR wave I amplitudes are associated with an increased probability of reporting tinnitus.

Clinicians' Guide to Obtaining a Valid Auditory Brainstem Response to Determine Hearing Status: Signal, Noise, and Cross-Checks

2018 ◽  
Vol 27 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Linda W. Norrix ◽  
David Velenovsky
Keyword(s):  
Hearing Loss ◽  
Auditory Brainstem Response ◽  
Otoacoustic Emissions ◽  
Screening Program ◽  
Auditory Brainstem ◽  
Noise Signal ◽  
Quality Data ◽  
Evidence Based ◽  
Hearing Status ◽  
Brainstem Response

Purpose The auditory brainstem response (ABR) is a powerful tool for making clinical decisions about the presence, degree, and type of hearing loss in individuals in whom behavioral hearing thresholds cannot be obtained or are not reliable. Although the test is objective, interpretation of the results is subjective. Method This review provides information about evidence-based criteria, suggested by the 2013 Newborn Hearing Screening Program guidelines, and the use of cross-check methods for making valid interpretations about hearing status from ABR recordings. Results The use of an appropriate display scale setting, templates of expected response properties, and objective criteria to estimate the residual noise, signal level, and signal-to-noise ratio will provide quality data for determining ABR thresholds. Cross-checks (e.g., immittance measures, otoacoustic emissions testing, functional indications of a child's hearing) are also needed to accurately interpret the ABR. Conclusions Using evidence-based ABR signal detection criteria and considering the results within the context of other physiologic tests and assessments of hearing function will improve the clinician's accuracy for detecting hearing loss and, when present, the degree of hearing loss. Diagnostic accuracy will ensure that appropriate remediation is initiated and that children or infants with normal hearing are not subjected to unnecessary intervention.

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