Middle ear and growth rate effect in DPOAE responses

• Grant number: 08/05151-9
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: September 01, 2008
• End date: June 30, 2011
• Field of knowledge: Health Sciences - Speech Therapy
• Principal Investigator: Renata Mota Mamede Carvallo
• Grantee: Ualace de Paula Campos
• Host Institution: Faculdade de Medicina (FM). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Considering that the Distortion Product Otoacoustic Emissions (DPOAE) are produced by cochlear non-linear mechanisms, it is possible to understand these mechanisms studying the cochlear compressive characteristics. However, there is a large variability within normal-hearing individuals DPOAE responses caused by interferences of sound conduction (middle ear), inner ear conditions, stability and reproducibility of the stimulus, type of probe and environmental noise. A better understanding of the middle and inner ear interferences will help us to reach more specific DPOAE responses of the cochlea, leading to an exam able to detect mild alterations of the outer hair cells. This study aims to compare the slope and threshold of the DPOAE growth function and DPOAE amplitude; and the middle ear function (tympanogram probe of 1000Hz) and the DPOAE response. One hundred individuals will be evaluated, being 50 men and 50 women. Will be excluded individuals with middle ear pathologies or alterations, hearing thresholds higher than 20dBHL, alcoholic or drugs users, pigment disorders and persistent use of salycilate. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CAMPOS, UALACE DE PAULA; MAMEDE CARVALLO, RENATA MOTA. Correlação entre os limiares das curvas de crescimento das EOAPD e tons puros. Brazilian Journal of Otorhinolaryngology, v. 77, n. 6, p. 754-760, NOV-DEC 2011. (08/05151-9)

CAMPOS, UALACE DE P.; SANCHES, SEISSE G.; HATZOPOULOS, STAVROS; CARVALLO, RENATA M. M.; KOCHANEK, KRZYSZTOF; SKARZYNSKI, HENRYK. Alteration of distortion product otoacoustic emission input/output functions in subjects with a previous history of middle ear dysfunction. Medical Science Monitor, v. 18, n. 4, p. MT27-MT31, APR 2012. (08/05151-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CAMPOS, Ualace de Paula. Middle-ear and growth functions on the responses of the otoacoustic emissions. 2011. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Medicina (FM/SBD) São Paulo.