Middle ear pressure equilibration ability and spontaneous pressure changes in healthy ears with ventilation tubes.

Abstract:

CONCLUSION:The results of this study give support to the theory that opening the middle ear (ME) to the atmosphere leads to a deterioration in its pressure regulation capacity. However, this is probably not the reason why a perforation of the tympanic membrane becomes chronic. OBJECTIVE:Direct, continuous measurement is a method of studying ME pressure regulation. We found previously that subjects with chronic central perforation (CCP) had a negative ME pressure in the daytime, in contrast to subjects with healthy ears. In this study, in order to elucidate the cause of this negative pressure, measurements were performed in healthy ears with ventilation tubes (VTs). MATERIAL AND METHODS:A VT was inserted 1 week prior to the measurements in 18 subjects. A hearing protector was tightly fitted deep into the external ear canal and connected to a portable system consisting of a pressure transducer and a memory. RESULTS:The measurements revealed a mean ME pressure during the first 3 h of -27 daPa. Ten subjects showed an initial decrease in pressure leading to a considerable negative mean ME pressure and a poor ability to equilibrate pressure differences through the Eustachian tube, like the subjects with CCP.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Brattmo M,Tideholm B,Carlborg B

doi

10.1080/00016480510029374

subject

Has Abstract

pub_date

2005-07-01 00:00:00

pages

702-6

issue

7

eissn

0001-6489

issn

1651-2251

pii

MDKE25R56AUVKHTX

journal_volume

125

pub_type

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