This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citation map  • Citing articles on HighWire  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

Robert W. Keith, PhD

Arch Otolaryngol. 1975;101(6):376-379.

Abstract
This study was designed to investigate the middle ear function of neonates during the first few hours of life. Twenty normal babies, ranging in age from 2.5 to 20 hours old, were tested with an electro-acoustic impedance bridge. Measurements of the acoustic compliance of the tympanic membrane and tympanometry were obtained on both ears of each child.

Results of compliance measurements indicated a median of 1.2 cu cm with a range from 0.25 to 1.65 cu cm. Tympanometry results showed smooth notched-shaped tympanograms in most cases although a few M-shaped tympanograms were observed. All of the infants demonstrated normal middle ear pressures and mobile middle ear systems. The finding of normal middle ear function in these neonates suggests that mucus is not commonly present and therefore not a factor in infants' response to sound.

Author Affiliations
From the Department of Otolaryngology, the University of Cincinnati Medical Center, Cincinnati, OH 45267 (Dr. Keith).

Footnotes
Accepted for publication Jan 3, 1975.

Reprint requests to the Department of Otolaryngology, University of Cincinnati Medical Center, Cincinnati, OH 45267 (Dr. Keith).

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?

THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

Resolution of Middle Ear Effusion in Newborns
Roberts et al.
Arch Pediatr Adolesc Med 1995;149:873-877.
ABSTRACT  

External and Middle Ear Status Related to Evoked Otoacoustic Emission in Neonates
Chang et al.
Arch Otolaryngol Head Neck Surg 1993;119:276-282.
ABSTRACT  

Early Detection of Hearing Loss in Children With Cleft Palates by Brain-Stem Auditory Response
Helias et al.
Arch Otolaryngol Head Neck Surg 1988;114:154-156.
ABSTRACT  

Positive Middle Ear Pressure Shown by Tympanometry
Ostergard and Carter
Arch Otolaryngol Head Neck Surg 1981;107:353-356.
ABSTRACT  

Prospective Tympanometry in 3-Year-Old Children: A Study of the Spontaneous Course of Tympanometry Types in a Nonselected Population
Fiellau-Nikolajsen and Lous
Arch Otolaryngol Head Neck Surg 1979;105:461-466.
ABSTRACT  

Brain Stem Evoked Response Audiometry in Newborn Hearing Screening
Schulman-Galambos and Galambos
Arch Otolaryngol Head Neck Surg 1979;105:86-90.
ABSTRACT