Reliability and Accuracy of Chirp Based Multiple Auditory Steady State Response (MSSR) and Auditory Brainstem Response (ABR) in Children (original) (raw)
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Journal of Shifa Tameer-e-Millat University, 2019
Objective: Hearing loss (HL) with a local prevalence of 5.7%, is the commonest childhood disability, requiring Early Hearing Detection and Intervention (EHDI) programs to reduce the disability burden. Knowing the degree, type and configuration of HL is prerequisite for appropriate amplification, with Automated Auditory Brainstem Responses (ABR) being commonly used for this purpose, however Auditory Steady State Response (ASSR) has been recently introduced in the region. This study was conducted to compare ABR to ASSR, as an early diagnostic tool in children under five years of age. Methodology: This cross-sectional comparative study was performed at the Auditory Verbal Institute of Audiology and Speech (AVIAS) clinics in Rawalpindi and Islamabad, from December 2016 to September 2017. It included thirty-two cases (n=32) who visited AVIAS clinics for hearing assessment and conformed to the investigative protocol using non probability convenient sampling technique, and subjected to bot...
Journal of Shifa Tameer-e-Millat University, 2019
Hearing loss (HL) with a local prevalence of 5.7%, is the commonest childhood disability, requiring Early Hearing Detection and Intervention (EHDI) programs to reduce the disability burden. Knowing the degree, type and configuration of HL is prerequisite for appropriate amplification, with Automated Auditory Brainstem Responses (ABR) being commonly used for this purpose, however Auditory Steady State Response (ASSR) has been recently introduced in the region. This study was conducted to compare ABR to ASSR, as an early diagnostic tool in children under five years of age. Methodology: This cross-sectional comparative study was performed at the Auditory Verbal Institute of Audiology and Speech (AVIAS) clinics in Rawalpindi and Islamabad, from December 2016 to September 2017. It included thirty-two cases (n=32) who visited AVIAS clinics for hearing assessment and conformed to the investigative protocol using non probability convenient sampling technique, and subjected to both ABR and ASSR for comparative purposes. Correlations were calculated between the thresholds obtained by ABR and ASSR. Results: N=32 children (64 ears) with male female ratio of 2.2:1 and mean age of 33.50±17.73 months were tested with ABR and ASSR for hearing thresholds and correlation coefficient between 2KHz, 4KHz ASSR and average of both with ABR was calculated to be 0.92 and 0.90 and 0.94 respectively. Conclusion: ASSR provides additional frequency specific hearing threshold estimation compared to C-ABR, essentially required for proper setting of amplification devices.
Pakistan Journal of Medical Sciences, 2019
Objectives: To compare the hearing thresholds obtained with auditory brainstem response (ABR) and auditory steady state response (ASSR) audiometry in children with hearing loss. Methods: Hearing thresholds were obtained by ABR and ASSR in children who presented with suspicion of deafness at Ear, nose & throat department of Al-Nafees Medical College Hospital Islamabad, between January to August 2018. The mean hearing thresholds obtained by two tests were compared within each category of severity of deafness. Time taken by both tests was also compared. Results: A total of 57 patients (114 ears) were included in the study. Among them 27 (47.4%) were male and 30 (52.6%) were female. The mean age of patients at presentation was 42 months (±30.9) with age range from one to 12 years. Mean hearing thresholds obtained by click ABR, chirp ABR, ASSR (1, 2, 4 kHz) & ASSR (0.5, 1, 2, 4 kHz) was 56.25 (±27.61), 58.88 (±27.44), 58.03 (±21.26) & 56.35 (±22.86) respectively. Mean thresholds were com...
Validation of the Assr Test Through Complementary Audiologyical Methods
2011
Introduction: Auditory Steady State Response (ASSR) is an objective method for determining the auditive threshold, applicable and necessary especially in children. The test is extremely important for recommending cochlear implant in children. The aim of the study was to compare pure tone audiometry responses and auditory steady-state thresholds. Materials and method: The study was performed on a group including both patients with normal hearing and with hearing loss. The main inclusion criteria accepted only patients with normal otomicroscopic aspect, normal tympanogram, capable to respond to pure tone audiometry, and with ear conduction thresholds between 0 and 80 dB NHL. The patients with suppurative otic processes or ear malformations were excluded. The research protocol was followed, the tests being performed in soundproofed rooms, starting with pure tone audiometry followed, after a pause, by ASSR determinations at frequencies of 0.5, 1.2 and 4 KHz. The audiological instruments...
Correlation of Assr Hearing Thresholds with Abr Hearing Thresholds in Children
Journal of Hearing Science, 2018
BackgroundHearing assessment in neonates, or in older children/teenagers with special needs, is very challenging since a pure tone audiogram is not possible due to lack of co-operation and click-ABRs are not frequency specific.ObjectivesTo assess the value of auditory steady-state responses (ASSRs) in neonates or in uncooperative children/teenagers and correlate the hearing thresholds derived from them with those derived from ABR.Subjects and MethodsUsing ABR and ASSR, the hearing thresholds of 119 children too young to perform behavioral audiometry, and older children or teenagers with special needs (who were unable or unwilling to perform a pure tone audiogram), were assessed. The age range was 1 month to 18 years old with a mean age of 2.7 years and median of 2.3 years; the large majority (106 or 89%) were younger than 5 years.ResultsASSR was found to be a valuable and objective method for hearing assessment as a strong correlation between ABR-derived and ASSR-derived thresholds ...
The Egyptian Journal of Otolaryngology, 2016
This study was designed to investigate BC/ASSR in children with normal hearing, together with various types of hearing loss, to find out an objective method to differentiate between different types of hearing loss. Participants and methods A total of 80 children (with ages ranging between 3 and 6 years) were subjected to history taking, otological examination, and basic audiological evaluation in the form of pure-tone audiometry (AC, BC). Single monotic ASSR (AC, BC) was tested at 0.5, 1, 2, and 4 kHz. They were classified on the basis of hearing status into three categories (20 children each): category I, normal hearing; category II, SNHL (subdivided into two groups: group 1, mild-to-moderate SNHL; and group 2, severe-to-profound SNHL), and category III, conductive hearing loss. Results BC thresholds were poorer for ASSR testing compared with thresholds obtained with behavioral testing in normal category using 9, 7.5, 5.5, and 10.5 dBHL at 0.5, 1, 2, and 4 kHz, respectively. In category II, in the mild-to-moderate SNHL group, it was poorer using 16.25, 5.75, 12.25, and 11.75 dBHL at the same measured frequencies. Minimum levels at which spurious BC/ASSR occurred were established in the group with severe-to-profound SNHL as 52, 66.5, 69, and 64 dBHL at 0.5, 1, 2, and 4 kHz, respectively (no BC/PTA could be measured). In CHL category, it was poorer using 12.5, 8.5, 9.5, and 9 dBHL at 0.5, 1, 2, and 4 kHz, respectively. Preliminary normal levels for BC/ASSR at 0.5, 1, 2, and 4 kHz were 23.5, 22.5, 20, and 25 dBHL, respectively. In children with conductive hearing loss, the average BC/ASSR thresholds corresponded closely to those in the normal-hearing group. Conclusion BC/ASSR thresholds could be recorded reliably in children with normal hearing and conductive hearing losses. Meanwhile, BC/ASSR may not provide a reliable measure in cases of SNHL, especially cases with moderate or greater loss due to the low levels at which spurious responses may occur.
Hearing screening using OAE and ABR
IOSR Journals , 2019
Objective: This study included screening of hearing assessment of neonates and children using combined automated auditory brainstem response audiometry and otoacoustic emission testing in a tertiary care setup , to assess the prevalence of neonatal hearing loss and also to manage the children with profuse SNHL. Methods: A retrospective study was conducted between September 2016-September 2018 in Pacific Medical College and Hospital, Udaipur .First, all of neonates were evaluated by OAE within 24th to 48 th hours of birth. If responses of OAE were failing, they were retested in 1 month and 3 month after birth by OAE. Also, Neonates failing on above were assessed by ABR at the age of 6 months. A total of 1518 newborns were assessed by OAE, failing in it again after 3 months were asked for ABR testing. A bunch of 236 children were tested for ABR, among those 147 patient were confirmed of profound sensory neural hearing loss. Children who were confirmed of sensorineural hearing loss considered for rehabilitation either by prescribing hearing aids or cochlear implantation if fulfilled the criteria for the above. Results: Neonatal hearing screening using OAE and BERA is a feasible service. The estimated prevalence of confirmed hearing loss was comparable to that in literature. In our study 9.6 % children presented to our health care system within 2 years were found to have profound SNHL. Rehabilitation by either using hearing aids and surgically implanted stimulating device were enormously helpful to children who were in regular follow up.
Study of Hearing Loss in High Risk Infants using Brainstem Evoked Response Audiometry (BERA
1. Introduction: Speech is the primary mode of human communication, but its acquisition appears to rely upon auditory experiences during a critical period between the age of birth to 3yrs. Screening is one of the most important methods of early diagnosis hearing loss. Brain stem response audiometry is the method of choice for accurate detection of hearing threshold. The present study emphasizes the importance of using ABR as a screening tool for the detection of hearing impairment at an early stage which would have otherwise got unnoticed till about 2-3yrs. 2. Material and Method: The study was conducted on thirty normal and thirty high risk infants referred to the department of ENT, Rajendra Institute of Medical Sciences, Ranchi. Study Design: Comparative study After a detail history and clinical examination recording was done with AMPLAID MK 22 machines in a sound proof room. Sedation was used only when required. The hearing loss was quantified as mild, moderate and severe. An abnormal BERA necessitates a repeat test after three months. 3. Results: Study Group consisted of thirty infants. There were 8 infants with birth asphyxia, 10 infants with hyperbilirubinemia, 1 with cytomegalovirus infection, 5 infants with low birth weight, 2 infants with craniofacial anomalies, 4 infants with family history of hearing loss. The incidence of hearing loss in high risk group was 70%. P value <0.5 which is significant. The incidence of hearing loss on doing a repeat test was 60% which is clinically significant. Of the abnormal BERA readings four patients had bilateral mild hearing loss. Moderate hearing loss was found in five infants. This was bilateral in four cases and unilateral in one case. Eight infants had profound hearing loss. Here there were seven infants with bilateral hearing loss and one infant with unilateral hearing loss. One infants had maturational delay which was bilateral. Control Group: All the infants in the control group showed normal BERA readings. 4. Conclusion: The present study emphasizes the importance of using ABR as a screening tool for the detection of hearing impairment at an early stage which would have otherwise got unnoticed till about 2-3yrs. ABR audiometry because of its accuracy has emerged as a technique of choice in the screening infants as it is an objective test. There is also a need for large scale study on obtaining normal values and standardizing the procedures for effective applications.
ABR audiometry: Application to the paediatric population
South African Journal of Communication Disorders
This study examines the relationship between Auditory Brain Stem, Behavioural Observation and Impedance Audiometry in a paediatric population. Particular reference is made to the strengths and weaknesses of Auditory Brainstem Audiometry applied to this age group. Results indicate that in some cases diagnosis of hearing loss is made primarily on the basis of this test, while in other cases the test serves as an excellent check on Behavioural and Impedance Audiometry.