Results 241 to 250 of about 92,906 (291)

Structure of the Round Window Membrane

Acta Oto-Laryngologica, 1988
In the present study the literature on the round window membrane (RWM) structure was reviewed and the rat used as an animal model to elucidate structural alterations of the RWM occurring during serous (SOM) and purulent (POM) otitis media. In SOM the RWM was about the same thickness as that of the control, whereas in POM it increased about 5-fold.
S, Hellström, U, Johansson, M, Anniko
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Permeability of the round window membrane

Archives of oto-rhino-laryngology, 1984
Cefmetazole sodium, a cephamycin antibiotic, was shown to pass through the round window membrane into the inner ear of the guinea pig. The concentration of the drug in the inner ear fluid indicated that a larger amount of the drug reached the inner ear through the round window membrane than when administered intraperitoneally.
T, Okuno, Y, Nomura
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Blood flow of the round window

Archives of Oto-Rhino-Laryngology, 1981
Motion pictures of the blood flow of the round window in guinea pigs were taken. In this part the blood flow of the inner ear could be distinguished from that of the middle ear. Our motion pictures show that the blood flow of the inner ear can be observed through the round window membrane without an operation on the inner ear.
T, Nakashima, A, Ito
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Anatomy of the round Window Niche

Annals of Otology, Rhinology & Laryngology, 1986
The contributing elements to boundaries of the round window niche are superiorly the tegmen fossula fenestra rotunda (roof support), inferiorly the fustis (depth) and area concamerata, anteriorly the sustentaculum (support) and postis anterior (anterior pillar), and posteriorly the postis posterior (posterior pillar) and the subiculum (underlying ...
B, Proctor, B, Bollobas, J K, Niparko
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Rupture of the round Window Membrane

Annals of Otology, Rhinology & Laryngology, 1976
A case of sudden deafness due to rupture of the round window membrane is presented. Nineteen similar cases have previously been reported in the literature. In a review of these twenty patients, it is noted that a history of concurrent physical effort or barotrauma was present in eighteen.
P H, Taylor, P G, Bicknell
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Ultrastructure of the round window membrane

The Laryngoscope, 1972
AbstractThe round window membrane presents the only non‐osseous wall of the labyrinth. Electron microscopic study of the round window membrane was undertaken in order to determine whether it could act as a route of transmission from the middle to the inner ear.In the cat round window membrane three layers can be identified.
R J, Bellucci, E G, Fisher, J, Rhodin
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Rupture of the round window membrane

The Journal of Laryngology & Otology, 1975
A perilymph leak into the middle ear through a ruptured round window membrane results in the symptoms of hearing loss, tinnitus and vertigo, either singly or in combination. The case histories of thirteen patients with such a fistula are described, these patients having in common a predisposing incident which had led to a rise of C.S.F.
J P, Tonkin, P, Fagan
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Round window reflex and oval window fistulae

The Journal of Laryngology & Otology, 1989
AbstractThe round window reflex is normally absent in stapedial fixation. In this study, six cases of oval window fistula are described in which the round window reflex was absent. This is probably because there is insufficient pressure transmitted to the round window membrane through the perilymph because of leakage from the oval window.
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Endoscopic Repair of Round Window Cochleocele

Otology & Neurotology, 2022
Objective To describe the novel presentation, implications, and endoscopic management of a congenital round window cochleocele. Patient A 16-month old girl with profound hearing loss from bilateral incomplete partition type 1 (IP1) anomaly of the cochlea plus left-sided cochlear ...
Adrian L, James, Blake C, Papsin
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Rupture of the Round Window Membrane

Otolaryngologic Clinics of North America, 1978
Considerable interest has been displayed in sudden sensori-neural deafness in recent years, and especially since Blair Simmons postulated that this could be caused by mechanical disruption of the membranes in the inner ear. The literature concerning such reports is reviewed briefly and two cases of rupture of the round window membrane resulting from ...
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