Yoshio Ogura

Okayama University, Okayama, Okayama, Japan

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Publications (23)13.96 Total impact

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    ABSTRACT: Preoperative cytologic diagnosis of the maxillary sinus was performed on 57 patients by examining of solutions obtained by local washing following sinus puncture. There were 6 cases of cancer (5 squamous cell carcinomas and 1 adenoid cystic carcinoma), 1 malignant melanoma, 1 odontoma, 8 aspergillosis, 1 inflammatory pseudotumor, 9 odontogenic maxillary sinusitis and conventional chronic sinusitis in residual cases. There were 2 false-negative cytologies in the 7 cases of malignant tumor (i.e., 1 adenoid cystic carcinoma and 1 squamous cell carcinoma). The significance and usefulness of the cytologic approach to preoperative diagnosis of malignancies, including malignant melanoma and fungal infection were discussed.
    The Laryngoscope 09/1989; 99(8 Pt 1):842-5. DOI:10.1288/00005537-198908000-00012 · 2.14 Impact Factor
  • Nippon Jibiinkoka Gakkai Kaiho 07/1988; 91(6):856-64.
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    ABSTRACT: The computer-aided serial section reconstruction system (SERSERS) was employed to elucidate the entire configuration of the vestibular aqueduct in the human temporal bone. The advantages and the disadvantages of this system are discussed in comparison with several conventional methods such as X-ray visualization, plastic casting and graphic reconstruction. In spite of some limitations encountered, such as difficulty in placing a marker on each section or time consumption in data input, SERSERS can be useful in the study of the vestibular aqueduct, since a three-dimensional structure which can be observed from multidirectional aspects is reconstructed.
    Acta oto-laryngologica. Supplementum 02/1988; 447(s447):100-4. DOI:10.3109/00016488809102864
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    ABSTRACT: The clinical course and the changes of the levels of immunological factors after tonsillectomy in several cases of IgA nephropathy associated with chronic tonsillitis are presented in this paper. In the first study, here called Part I, 16 cases of IgA nephropathy were observed with regard to the clinical course and the changes of immunological factors after the operation. Postoperatively, proteinuria disappeared in 9 cases and improved in 3 and the levels of serum IgA, the circulating immune complex (CIC) and serum polymeric IgA decreased. In the next study, Part II, 10 cases of IgA nephropathy were investigated regarding the changes of the levels of serum IgA, C3, C4, CH50, APCH50 and CIC after the provocation test and tonsillectomy. A tendency of decreasing levels of C3 and APCH50 combined with an increase of CIC was observed within one week after provocation. Decreases in the levels of serum IgA, polymeric IgA, C3 and APCH50 were also observed after the operation. From these results, it is suggested that the tonsillar lesion has a tendency to continue the pathogenetic effect on the disease and exacerbate its clinical symptoms.
    Acta oto-laryngologica. Supplementum 02/1988; 454(454, supplement):248-55. DOI:10.3109/00016488809125036
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    ABSTRACT: Screening for hard-of-hearing children by questionnaire was conducted along with the physical examination of 1-year-6-month-old children performed under the auspices of the Japanese Ministry of Health and Welfare. The questionnaire was given to 1, 011 parents and guardians (mostly mothers), of whom about 70% responded.The response rate to individual questions was examined. Most of the questions concerned the reactions to sound and the developement of hearing and speech. The frequency of “I don't know” as a response to these questions was very low and more than 90% of the respondents replied “yes” or “no” to questions was 5, 8, 10, 12, 13, 15 and 18, which dealt with observations on reactions to sounds, and questions 19-21 and 23, which dealt with speech development and language comprehension.Past methods of screening for hard-of-hearing children were introduced and compared with the present method. The applicability of the present method to screening was discussed.
    Nippon Jibiinkoka Gakkai Kaiho 01/1988; 91(6):856-864,985. DOI:10.3950/jibiinkoka.91.856
  • K Nishioka · T Meguro · Y Masuda · R Date · Y Ogura
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    ABSTRACT: On 37 patients with nasal allergy and 37 non-smoking healthy volunteers, maximal expiratory flow-volume curve and volume-time curve were obtained. To find the characteristic flow changes, the flow curves were classified into five patterns from type A to type E. The results showed that the incidence of type A was significantly lower in patients with nasal allergy than in the control group, while the rate of type E was significantly higher at 46% and the rate of type B was particularly high (32.4%) in the patient group. It was demonstrated that 77% of the subjects provided B or C flow-volume curves, while those with pale nasal mucous membranes developed D and E formats. In patients with nasal allergy, these patterns are useful in diagnosing remarkable differences in the lower airways.
    Annals of allergy 12/1987; 59(5):379-82.
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    ABSTRACT: Three cases of persistent bilateral sensorineural hearing loss following Mycoplasma pneumoniae (MP) infection are reported. These cases were characterized by highly elevated MP complement fixation titer and cold hemagglutinin titer. All the patients had bilateral acute otitis media with a moderate to high degree of mixed hearing loss in the early stage following primary atypical pneumonia (PAP).
    The Laryngoscope 11/1987; 97(10):1203-6. DOI:10.1288/00005537-198710000-00015 · 2.14 Impact Factor
  • Yu Masuda · Hiroki Honjo · Masayuki Naito · Yoshio Ogura
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    ABSTRACT: Normal development of the stapes, especially the bilaminar structure of the footplate, in the mouse was investigated histologically. On day 14 of pregnancy, the footplate had an easily distinguishable lamina consisting of two layers. This bilaminar structure was seen clearly as a pale and loose portion composed of mesenchymal cells in the vestibular side adjacent to the original footplate in the stapedial ring. The authors considered this structure to be the same structure as the lamina stapedialis in the developing human stapes. A dualistic theory of the developmental origin of the footplate in the mouse is proposed.
    Auris Nasus Larynx 02/1987; 14(1):1-7. DOI:10.1016/S0385-8146(87)80002-0 · 1.14 Impact Factor
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    ABSTRACT: The therapeutic results obtained from the treatment of juvenile laryngeal papillomas with combined laser surgery and alpha-type IFN treatment are reported. Three cases of papilloma occurring under four years of age were found to be of the fulminant type with a strong tendency for recurrence. The results were complete remission of papilloma in two cases and a residual trace in one case. Thus, at present, control of the disease has been successful. A combination of several modes of treatment may be necessary for a more lasting therapeutic effect. Currently, no single method has been used to treat the disease. Laser surgery and IFN are both powerful therapies for this tenacious disease.
    Auris Nasus Larynx 02/1985; 12(2):117-24. DOI:10.1016/S0385-8146(85)80009-2 · 1.14 Impact Factor
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    ABSTRACT: Temporal bones of six infants with congenital ear anomalies were examined for abnormalities of the oval window and facial nerve. These temporal bones were classified into two groups according to the degree of malformation: group A, those with atresia or absence of the oval window; and, group B, those with hypoplasia of the stapes and annular ligament. Group A, consisting of five ears, were associated with severe middle ear anomalies such as the abnormal course of the facial nerve and absence of the stapes. In group B, consisting of seven ears, the stapes were present and the facial nerve presented minor anomalies such as obtuse angulation at the first genu, central migration of the geniculate ganglion cells, ectopic muscles and a wide bony dehiscence of the facial canal around the oval window. Probable origin of the anomalies in group A could mainly be due to maldevelopment of the facial nerve during an earlier embryonal period while that of group B could have developed after the ninth week of the fetal period and are mostly localized along the second branchial arch.
    Auris Nasus Larynx 02/1985; 12(3):139-48. DOI:10.1016/S0385-8146(85)80012-2 · 1.14 Impact Factor
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    ABSTRACT: For the purpose of observing the vibration of the human tympanic membrane clinically, a holocamera was test designed and manufactured. At the stage of test design, an experiment revealed the deterioration of laser light in its coherency when it came out through the optical fiber. As the method of improving the deteriorated coherency, two laser beams both of which were passed through the optical fiber bundle, were used for the illumination beam as well as the reference beall under a certain condition. This procedure made possible to manufacture a pulsed holo-camera well suitable for the clinical use
    15th International Congress on High Speed Photography and Photonics; 03/1983
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    ABSTRACT: Three-dimensional displays of anatomical structures and clinical findings are very persuasive and instructive. Using multiplex holograms, we designed a display of three-dimensional images of otological specimens. Multiplex holograms, reported by Cross of the United States in 1975, enable reconstruction of three-dimensional moving images and are used for artistic display as well as for teaching in medicine and general education. Multiplex holograms were recorded in a two-step process. The first step is to make a series of original cine-pictures of an object from different horizontal directions, rotating it on a turntable. In the second step, one frame of the original film is recorded on a narrow strip hologram. All frames of the original film are recorded one after another and a complete multiplex hologram can be synthesized. In the reconstruction stage, the multiplex hologram is formed into a cylinder and illuminated from below by a small white light source. Reconstructions of the three-dimensional bright images of the object inside the cylindrical holographic screen are shown.
    Auris Nasus Larynx 02/1983; 10(2):71-7. DOI:10.1016/S0385-8146(83)80031-5 · 1.14 Impact Factor
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    ABSTRACT: Unilateral cystic inner ear anomalies were diagnosed in two siblings, a 9 year old boy and a 6 year old girl. X-ray examination of the temporal bone was performed, together with audiological examinations and vestibular function tests. The common tomographic X-ray findings consisted of an enlarged solitary sac type deformity of the vestibule with narrowing of the internal auditory canal, severe hypoplasia of the anterior semicircular canal and no visualized cochlea. Pure-tone audiometry revealed severe mixed type of hearing loss in the right ear in both children. The test for vestibular function showed no response to caloric testing.
    Acta medica Okayama 09/1982; · 0.70 Impact Factor
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    ABSTRACT: Holographic interferometry was applied to medical investigation regarding the vibration analysis of several parts of the sound conducting apparatus of mankind and some experimental animals. Vibration patterns of the tympanic membrane, the auditory ossicles and the skull were demonstrated and the results were discussed. Merit of holographic interferometry as a new technique of vibration analysis was emphasized, and several points to be considered by its application to medical investigation were also discussed.
    13th International Congress on High Speed Photography and Photonics; 07/1979
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    ABSTRACT: This paper shows a casting method of the vascular system of the inner ear of the guinea pig with the use of fluid resin injected intravascularly and the observation of those specimens by means of the scanning electron microscopy. First, fluid resin was injected into the blood vessels of a live or just sacrificed guinea pig. After taking the temporal bone out of the animal, it was decalcified and macerated completely. Then, a cast of the inner ear vessels was taken and observed with a scanning electron microscope. A pair of photos differing in teh view angle by seven degrees were taken simultaneously, and observed with a stereoviewer. This technique brought photographs of well magnified three-dimensional construction of the inner ear blood vessels.
    Auris Nasus Larynx 02/1979; 6(1):1-11. DOI:10.1016/S0385-8146(79)80002-4 · 1.14 Impact Factor
  • Yoshio Ogura · Yu Masuda · Ryusuke Saito
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    ABSTRACT: The following objects were specifically designed for teaching material to the medical students. Dried human auditory ossicles were bleached in 30% hydrogen peroxide solution and then, embedded in a good quality plastic. The plastic mass was shaped into a ball 5 cm in diameter, and the surface of which was polished with a good finish. The merits of the objects may be listed as follows; 1) A permenant preservation of the objects is possible because they are embedded in heat- and chemical-resistant material. 2) The objects are handy for use in the lecture room and easily observed by the students because of the magnifying effect of the plastic covering.
    Auris Nasus Larynx 02/1978; 5(2):77-81. DOI:10.1016/S0385-8146(78)80010-8 · 1.14 Impact Factor
  • 01/1978; 71(11):1387-1395. DOI:10.5631/jibirin.71.1387
  • 01/1977; 70(10):927-937. DOI:10.5631/jibirin.70.927
  • 01/1977; 20(6):709-712. DOI:10.4295/audiology.20.709
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    ABSTRACT: Scanning electron microscopy on the cochlea of guinea pig elucidated the morphological relationships between the tectorial membrane and the organ of Corti, more precisely. The tectorial membrane consists of two layers; one is the upper, fibrous layer and the other is the lower, thinner, granular layer made of amorphous, granular substance. With the latter it is attached to the surface of the inner sulcus cell as well as hair cells. The manners of attachment, however, are different in the outer hair cells and the inner ones. The outer hair cells make a fairly firm attachment to the tectorial membrane by inserting the tips of hairs of the outermost row of each hair cell into the granular layer. On the other hand, the inner hair cells are attached to the granular layer through the protruding granular substance at the top of hairs of the outermost row. Though the fibrous layer of the tectorial membrane terminates in the vicinity of the outermost Deiters' cell phalanx, the granular layer extends more outwards and communicates along the junction of the phalanx and Hensen's cell and covers the surface of Hensen's cells.