Direct observation of the tympanic cavity by the superfine fiberscope.

Kimura, Hitoshi; Yamaguchi, Hideki; Cheng, Seishu; Okudaira, Tadao; Kawano, Atsushi; Iizuka, Naohisa; Imakirei, Moriyoshi; Funasaka, Sotaro

doi:10.3950/jibiinkoka.92.233

Cited by 28 publications

(15 citation statements)

References 1 publication

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“…Also anatomical patency of the eustachian tube can be confirmed. In a Japanese study even small cholesteatomas and traumatic dislocations of the ossicular chain were visualized [6]. Chays et al [8] could also observe facial recess and tympanic sinus, which turned out to be difficult in our study.…”

Section: Discussionmentioning

confidence: 56%

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Middle Ear Imaging via the Eustachian Tube with a Superfine Fiberoptic Videomicroendoscope

Karhuketo¹,

Puhakka²

1998

ORL

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The aim of this study was to systemically evaluate the visualization of the middle ear structures with a superfine fiberoptic videomicroendoscope introduced via the eustachian tube. With the permission of the Finnish Ministry of Health ten temporal bone blocks were dissected from lately succumbed patients. An Olympus AF-8 (0.8 mm outer diameter) angiofiberscope was used. The AF-8 fiberoptic videomicroendoscope is a straightforward-looking endoscope with a 55° field of view. The endoscope tip was introduced through the eustachian tube into the middle ear and the middle ear structures were visualized and counted. Forty-three anatomical structures were listed and the results presented in a categorized table. Nineteen anatomical objects among 43 were never observed in any temporal bone block. The rest of the anatomical structures were visualized to varying degrees.

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Section: Discussionmentioning

confidence: 56%

“…Kimura et al [6] have studied patients with cholesteatoma or traumatic dislocation of the ossicular chain with superfine fiberscopes. They used local anesthesia in an outpatient clinic instead of general anesthesia as preferred by some authors.…”

Section: Introductionmentioning

confidence: 99%

Middle Ear Imaging via the Eustachian Tube with a Superfine Fiberoptic Videomicroendoscope

Karhuketo¹,

Puhakka²

1998

ORL

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“…Ausschluß von Perilymphfisteln [5,10,14,16,17], die Inspektion der nicht einsehbaren Recessus bei Cholesteatomerkrankung [4,11,17,20], der Einsatz bei "Second-look-Operationen" und die Instillation von Aminoglykosiden in die runde Fensternische. Bei Operationen im Bereich des Kleinhirnbrücken-winkels wird mit dem Einsatz des Endoskops heute schon eine zusätzliche Inspektion des Operationsgebiets zum Ausschluß von Residualtumoren in nicht einsehbare Bereiche vorgenommen [12].…”

Section: In-vivo-cochleoskopie Durch Das Runde Fensterunclassified

In-vivo-Cochleoskopie durch das runde Fenster

Pfister

Maier

Gummer

et al. 1997

HNO

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The overall aim of the present investigation was to develop a technique for endoscopic investigation of the cochlea. In the experiments reported here, the possible effect of the endoscope-called the "cochleoscope"-on the electrophysiology of the cochlea was investigated by recording the cochlear action potential (CAP) threshold tuning curve from (0.1-34 kHz). The dorsolateral bulla of anesthesized guinea pigs (with ketamine 60 mg/kg and Rompun 12 mg/kg) was opened, after which the cochleoscope was introduced under micromanipulator control through the round window membrane. Three cochleoscopes were used and had diameters of 0.29 mm, 0.7 mm and 0.89 mm, respectively, containing 2000, 3000 and 3000 fibers each. Experiments in 7 animals showed that the cochleoscope did not influence CAP thresholds. Although the present resolution of the endoscopes is limited, the basilar membrane can be clearly distinguished from the osseous spiral lamina. It is anticipated that improved resolution will allow the cochleoscope to be used for diagnostic purposes in cases of sensorineural hearing loss.

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“…Transtubal endoscopies of the middle ear have been made by several authors: Kimura 1989, Hopf 1991, Magnan 1991, Edelstein 1994and Klug 1999. It has been proved that it is possible to observe at least some of the middle ear structures and pathology via the Eustachian tube with an endoscope.…”

Section: Introductionmentioning

confidence: 99%

Comparison of CT and fiberoptic video-endoscopy findings in congenital dysplasia of the external and middle ear

Karhuketo

Ilomäki

Dastidar

et al. 2001

European Archives of Oto-Rhino-Laryngology

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Twenty-six ears (of 25 patients) with congenital dysplasia of the external and middle ear were studied with two different types of imaging technologies in order to find out if it is possible to improve the anatomical overview of the dysplastic middle ears by combining the imaging methods. All the 26 ears were studied with computed tomography (CT), which gave cross-sectional images of the tympanic cavity. A fiberoptic video-endoscope (FVE) was introduced through the nose and via the Eustachian tube into the middle ear so that the topographic view of the anatomical structures of the middle ear could be visualized. Some structures were visualized better with FVE than with CT and vice versa. We concluded that the combined information obtained from these two imaging technologies provided a better understanding of the structural anatomy of a congenital dysplastic middle ear.

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Direct observation of the tympanic cavity by the superfine fiberscope.

Cited by 28 publications

References 1 publication

Middle Ear Imaging via the Eustachian Tube with a Superfine Fiberoptic Videomicroendoscope

Middle Ear Imaging via the Eustachian Tube with a Superfine Fiberoptic Videomicroendoscope

In-vivo-Cochleoskopie durch das runde Fenster

Comparison of CT and fiberoptic video-endoscopy findings in congenital dysplasia of the external and middle ear

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