Biomaterial Database

Predictive value of tympanometry in middle ear effusion. 1986

G A Gates, and C Avery, and J C Cooper, and E M Hearne, and G R Holt

The presence of middle ear effusion may be inferred from a tympanogram by the configuration of the pressure compliance curve. Not infrequently, however, effusion is absent at the time of surgery when strongly indicated by preoperative tympanometry. We evaluated this discrepancy by contrasting preoperative tympanograms with the findings at surgery in 462 children, aged 4 to 8 years, with clinical evidence of persistent effusion in 909 ears. Based on these results we can classify tympanograms as to high risk for effusion, intermediate, and low risk. The proportion of ears with effusion was 83%, 47%, and 34%, respectively. The proportion of ears with fluid in the high risk tympanogram group did not change appreciably over a 1- to 8-week period, ie, no trend toward spontaneous resolution occurred. The high incidence of effusion at surgery in our low risk group is far higher than expected and is presumably due to reinfection of these ears during the time between examination and operation.

UI	MeSH Term	Description	Entries
D010034	Otitis Media with Effusion	Inflammation of the middle ear with a clear pale yellow-colored transudate.	Middle Ear Effusion,Otitis Media, Secretory,Otitis Media, Serous,Ear Effusion, Middle,Ear Effusions, Middle,Effusion, Middle Ear,Effusions, Middle Ear,Middle Ear Effusions,Secretory Otitis Media,Serous Otitis Media
D011336	Probability	The study of chance processes or the relative frequency characterizing a chance process.	Probabilities
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D005188	False Negative Reactions	Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)	False Negative Reaction,Reaction, False Negative,Reactions, False Negative
D005189	False Positive Reactions	Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)	False Positive Reaction,Positive Reaction, False,Positive Reactions, False,Reaction, False Positive,Reactions, False Positive
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000158	Acoustic Impedance Tests	Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance).	Audiometry, Impedance,Electroacoustic Impedance Tests,Impedance Tests, Acoustic,Tympanometry,Acoustic Impedance Test,Electroacoustic Impedance Test,Impedance Audiometry,Impedance Test, Acoustic,Impedance Test, Electroacoustic,Impedance Tests, Electroacoustic,Test, Acoustic Impedance,Test, Electroacoustic Impedance,Tests, Acoustic Impedance,Tests, Electroacoustic Impedance
D014432	Tympanic Membrane	An oval semitransparent membrane separating the external EAR CANAL from the tympanic cavity (EAR, MIDDLE). It contains three layers: the skin of the external ear canal; the core of radially and circularly arranged collagen fibers; and the MUCOSA of the middle ear.	Eardrum,Eardrums,Membrane, Tympanic,Membranes, Tympanic,Tympanic Membranes