Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Abnormal positive potentials in round window electrocochleography
Autore:
OLeary, SJ; Mitchell, TE; Gibson, WP; Sanli, H;
Indirizzi:
Royal Victorian Eye & Ear Hosp, Dept Otolaryngol, Melbourne, Vic 3002, Australia Royal Victorian Eye & Ear Hosp Melbourne Vic Australia 3002 02, Australia Addenbrookes Hosp, Dept Otolaryngol, Cambridge CB2 2QQ, England Addenbrookes Hosp Cambridge England CB2 2QQ , Cambridge CB2 2QQ, England Univ Sydney, Dept Otolaryngol, Sydney, NSW 2006, Australia Univ Sydney Sydney NSW Australia 2006 ryngol, Sydney, NSW 2006, Australia
Titolo Testata:
AMERICAN JOURNAL OF OTOLOGY
fascicolo: 6, volume: 21, anno: 2000,
pagine: 813 - 818
SICI:
0192-9763(200011)21:6<813:APPIRW>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHILDREN;
Keywords:
electrocochleography; auditory nerve; sensorineural hearing loss; auditory evoked potential; cochlear implant; pediatric otolaryngology; kernicterus; prematurity; perinatal hypoxia;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: O'Leary, SJ Royal Victorian Eye & Ear Hosp, Dept Otolaryngol, 32 Gisborne St, Melbourne, Vic 3002, Australia Royal Victorian Eye & Ear Hosp 32 Gisborne St Melbourne Vic Australia 3002
Citazione:
S.J. O'Leary et al., "Abnormal positive potentials in round window electrocochleography", AM J OTOL, 21(6), 2000, pp. 813-818

Abstract

Objective: To describe an atypical waveform, termed an abnormal positive potential (APP), on round window electrocochleograms (RW ECochG) of childrenand to relate its occurrence to clinical history. Study Design: APPs were identified prospectively, and a retrospective analysis was made of these patients' clinical histories, audiograms, and auditory outcomes (hearing aid, cochlear implant, or nonauditory communication)Setting: Tertiary referral teaching hospital, day surgery and clinics. Patients: All 431 children <110 months of age suspected of a severe to profound hearing loss who underwent RW ECochG From January 1993 to August 1997. Intervention: Diagnostic RW ECochG for auditory threshold estimation. Main Outcome Measure: The presence on the RW ECochG of the APP: an early positive potential in the absence of a compound action potential (CAP). Results: An APP was observed in 34 children. The APP was most marked in response to clicks and 8-kHz tones. The APP click threshold averaged 70 dB hearing loss. The brainstem evoked potential of these children showed an absence of waves, or a broad positive wave with no subsequent waves. Twenty-nine of 30 behavioral audiograms obtained were indicative of severe to profound hearing loss. Auditory outcomes were available from 26 children; 45% of them derived no help from a hearing aid, and 8 children received a cochlear implant. Clinical factors frequently associated with APP were prematurity in combination with kernicterus or hypoxia. Conclusions: APP thresholds were lower than neural thresholds or behavioral thresholds. Children with APP need close follow-up, because half of thosestudied needed nonauditory strategies to develop effective communication.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:02:34