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Biomedical subjects

N Yanagihara

Publications and source records attributed to N Yanagihara.

At least 217 records · Page 12Linked to original sources
PubMed1981

Cholesteatoma in the petrous apex.

Six patients with extensive cholesteatoma in the petrous pyramid are reported. All patients had a facial palsy of long duration. In five patients with a history of otitis media, radiographic examinations and surgical explorations revealed chronic inflammatory changes in the middle ear, which suggested that the cholesteatoma in the petrous pyramid was associated with a preceding otitis media. Only in one patient, without a past history of otitis media, was the cholesteatoma assumed to be of congenital origin. The cholesteatoma was totally removed in five patients using a translabyrinthine approach and in one by a middle cranial fossa approach. Control of middle ear infection, obliteration of the mastoid petrosal cavity, and facial nerve repair were supplementary but significant surgical problems.

Adult↗
PubMed1980

Electrically and acoustically evoked brain stem responses in guinea pig.

Brain stem evoked responses (BSERs) to acoustic and electrical stimulations of the cochlea were compared in guinea pigs. The electric stimuli evoked an averaged response of five to six successive waves within 10 msec, which was similar to that elicited by acoustic stimuli, though the latency of the electrical response was markedly shorter. Moreover, direct electrical stimulation of the auditory nerve evoked the same pattern of response as that elicited by electrical stimulation of the cochlea. On the other hand, stimulation of the vestibular nerve evoked a distinctly different pattern of response that lasted at most for 1.5 msec. Facial nerve stimulation evoked no brain stem response by this procedure. These results suggest that the waves of longer latency over 1.5 msec are available as indicators of auditory activity, even if the response elicited by electrical stimulation of the cochlea might be the sum of auditory and vestibular activities.

Acoustic Stimulation↗
PubMed1979

Transmastoid decompression of the facial nerve in Bell's palsy.

We describe the technique of decompression of the facial nerve from the geniculate ganglion to the stylomastoid foramen. The decompression was made on 51 patients with Bell's palsy, and the results of follow-up study were compared with those of 77 patients in whom the pyramidal and vertical segments were decompressed. The decompressions were indicated when a severe denervation of the nerve was confirmed by electrodiagnostic examinations. Incidences of notable residual palsy and of pronounced sequelae were always lower in the former group of patients regardless of the operational timing. In either group, a more desirable result was obtained by the decompression within 30 days, but a favorable effect of the decompression was recognizable even when the surgery was performed between 31 and 90 days after the onset.

Adolescent↗
PubMed1979

Goldenhar's syndrome associated with anomalous internal auditory meatus.

A case of Goldenhar's syndrome associated with fifth, seventh, and eighth nerve involvement is described. Tomographic examination of the temporal bones showed evidence of an abnormal internal auditory meatus. Otoneurological examination suggested that involvement of the seventh and eighth nerves was closely related to the abnormality in the internal auditory meatus.

Adolescent↗
PubMed1978

Cryosurgical treatment of glomus juglare tumor.

A 35 year-old Japanese female complained of a right-sided pulsation tinnitis, hearing disturbance, and facial weakness. Extensive radiographic studies including angiograms and retrograde juglar venography provided a diagnosis and localization of a tumor. Radical mastoidectomy was performed and a red grape-like glomus juglare tumor along the facial nerve was extirpated as there was a profuse hemorrhage from the tumor mass. Cryosurgery was then performed. Complete surgical removal is possible when the tumor is small, however, when the tumor involves the middle ear and mastoid area, complete extirpation cannot always be done. Radical mastoidectomy plus cryosurgery appears to be the most feasible management in the surgical treatment of glomus juglare tumor.

Adult↗
PubMed1975

Aberrant carotid artery in the middle ear.

A myringotomy performed on a 2-year-old girl, resulted in profuse aural hemorrhage which recurred when the patient cried. Carotid angiography revealed bilateral aberrant internal carotid arteries in the middle ears. In this case, and in previously reported cases as well, otalgia was one of the initial symptoms of the anomaly. So as to avoid faulty myringotomy, recognition of this entity is essential in cases presenting reddish swelling of the inferior quadrant of the tympanic membrane.

Aneurysm↗