The Size Of The Middle Ear And The Mastoid Air Cell: System Measured By An Acoustic Method

1978 ◽  
Vol 85 (1-6) ◽  
pp. 24-32 ◽  
Author(s):  
O. I. Molvær ◽  
F. M. Vallersnes ◽  
M. Kringlebotn
Keyword(s):  
Middle Ear ◽  
Acoustic Method ◽  
Cell System

Surgery of the Mastoid in Ears with Middle Ear Effusion

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 322-323 ◽  
Author(s):  
Jörgen Holmquist ◽  
Jan Jarlstedt ◽  
Anders Tjellström
Keyword(s):  
Middle Ear ◽  
Early Recognition ◽  
Chronic Otitis Media ◽  
Cell System ◽  
Middle Ear Effusion ◽  
Screening Programs ◽  
Mucosal Changes ◽  
Air Cells ◽  
Ear Effusion ◽  
Mastoid Air Cells

It has been demonstrated that in most ears with middle ear effusion the mastoid air cells may be involved as well. The mucosal changes and the secretion extends into all cavities of the ear including the mastoid air cells. In most ears insertion of a ventilating tube through the tympanic membrane is adequate for proper aeration of the middle ear as well as of the mastoid air cell system. The draining usually stops and the mucosa gradually changes into its normal condition. In a small percentage of these, the ear will continue to drain and the mastoid will not clear up. Antibiotics and decongestants fail to cure the ear. Surgical intervention of the mastoid may be indicated in the rare cases where conventional treatment fails to control the condition. The aim of this report is to 1) focus attention to the fact that the mastoid is an integral part of the middle ear cavity; 2) discuss the pathogenesis in stubborn ears with middle ear effusion; and 3) demonstrate the surgical procedure commonly used in our department in order to reestablish aeration of the mastoid air cell system. Early recognition and proper treatment of ears with middle ear effusion will hopefully reduce the incidence of stubborn cases and also decrease the number of those cases which end up with chronic otitis media and cholesteatoma. It is hoped that the screening programs involving school and even preschool children, as well as new preventative programs, will diminish the frequency of cases which need extensive surgery as discussed in this paper.

The Petromastoid Canal

1983 ◽  
Vol 92 (6) ◽  
pp. 640-644 ◽  
Author(s):  
Bruce Proctor
Keyword(s):  
Blood Vessels ◽  
Posterior Fossa ◽  
Middle Ear ◽  
Cell System ◽  
Facial Canal ◽  
Bony Labyrinth ◽  
Middle Ear Cleft ◽  
Petromastoid Canal

The embryology and anatomy of the petromastoid canal is reviewed. This structure may be responsible for the passage of some infections of the middle ear cleft into the posterior fossa. It also transmits important blood vessels to a portion of the bony labyrinth, to the facial canal, and to the mucosa of the mastoid air cell system.

Temporal Bone Fractures and Cholesteatoma

1983 ◽  
Vol 92 (6) ◽  
pp. 558-560 ◽  
Author(s):  
Joseph Freeman
Keyword(s):  
Temporal Bone ◽  
Surgical Management ◽  
Middle Ear ◽  
Surgical Approach ◽  
Bone Fractures ◽  
Late Complication ◽  
Cell System ◽  
Epithelial Invasion

Extralabyrinthine fractures of the temporal bone offer the opportunity for squamous epithelial invasion of the middle ear, petrous pyramid and mastoid air-cell system as a late complication. Cholesteatoma, secondary acquired in this situation, can be very aggressive and difficult to manage surgically, particularly where the temporal bone air-cell system is well developed. Polytomography is extremely helpful in determining the sites of fracture and in fashioning the surgical approach. Three cases are presented to illustrate the problems in diagnosis and surgical management.

SIZE OF THE MASTOID AIR CELL SYSTEM IN CHILDREN WITH MIDDLE EAR EFFUSION

1980 ◽  
Vol 90 (11) ◽  
pp. 1840-1844 ◽  
Author(s):  
Pontus Lindeman ◽  
John J. Shea
Keyword(s):  
Middle Ear ◽  
Cell System ◽  
Middle Ear Effusion ◽  
Ear Effusion

An Acoustic Method for Clinical Examination of the Ear

1963 ◽  
Vol 6 (4) ◽  
pp. 303-314 ◽  
Author(s):  
J. Zwislocki
Keyword(s):  
Clinical Examination ◽  
Middle Ear ◽  
Acoustic Impedance ◽  
Acoustic Method ◽  
Suggested Method ◽  
Supplementary Information ◽  
Impedance Measurements ◽  
Acoustic Resistance

An objective acoustic method is suggested for diagnostic examination of the ear. It provides supplementary information to the otoscopic and audiometric examinations. The acoustic method is based on impedance measurements at the eardrum by means of an acoustic bridge that is calibrated in absolute acoustic resistance and compliance units. The obtained values can be read directly on the instrument dials and no time consuming computations are required. The article includes an explanation of the concept of acoustic impedance, an analysis of the middle ear mechanism and of the acoustic effects of middle ear pathologies, in addition to a description of the suggested method.

Frequency of Pathologic Changes in the Middle Ear

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 11-13 ◽  
Author(s):  
Rolf Rudin ◽  
J. Holmquist
Keyword(s):  
Social Class ◽  
Hearing Impairment ◽  
Middle Ear ◽  
High Frequency ◽  
Cell System ◽  
Cell Area ◽  
X Ray ◽  
Mastoid Cell ◽  
Tympanic Membranes

One third of a total of 2,783 60-year-old males living in Gothenburg were examined to establish the frequency of pathologic changes in the middle ear. During 1973 to 1975, 767 men were examined. The eardrums were studied with otomicroscopy. Audiometric tests and x-ray of the mastoid cell system were performed. Pathologic changes were found in 37% of which 5% had chronic otitis. Hearing impairment was found in 95% of patients with chronic otitis. This group showed a significant reduction in mastoid cell area compared to males with normal tympanic membranes. There was a distinct relationship between low social class and small mastoid cell area and high frequency of noise injury.

Relation between the Onset of Chronic Middle Ear Inflammation and the Development of the Middle Ear Air Cell System

ORL ◽  
1988 ◽  
Vol 50 (5) ◽  
pp. 306-312 ◽  
Author(s):  
Humio Ikarashi ◽  
Yuichi Nakano
Keyword(s):  
Middle Ear ◽  
Cell System
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