AUDIOLOGY JAPAN
Online ISSN : 1883-7301
Print ISSN : 0303-8106
ISSN-L : 0303-8106
Volume 42 , Issue 2
Showing 1-14 articles out of 14 articles from the selected issue
  • Hideki Okubo, Shigenori Satoh, Narihisa Tachihara, Akira Hara, Jun Kus ...
    1999 Volume 42 Issue 2 Pages 79-82
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Endolymphatic hydrops was induced by obliteration of the endolymphatic sac in 10 albino guinea pigs, and DPOAEs were measured before the surgery, and at 2 and 4 weeks after the surgery. DPOAEs were confirmed to be significantly reduced at 2 weeks after the surgery in all animals. In five animals isosorbide was orally administered once a day from 2 to 4 weeks after the surgery, whereas no drug was given in the remaining 5 animals.
    In the non-administered group, DPOAEs were progressively reduced after the surgery. In contrast, DPOAEs of the isosorbide administered group were significantly elevated at 4 weeks after the surgery as compared with those of two weeks.
    These results indicated that DPOAEs were recovered by daily oral intake of isosorbide in the early stage of endolymphatic hydrops, and suggested the possibility to predict and prevent the attack of Ménière's disease using DPOAEs as the monitor of cochlear function and isosorbide as a treatment to alleviate hydrops, respectively.
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  • Hidenobu Taiji, Shigeo Ogawa, Ken Okamoto
    1999 Volume 42 Issue 2 Pages 83-87
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    We investigated the 2f1-f2 distortion products (DPs) in 5 normal-hearing subjects with unilateral tinnitus. There was no significant difference in the contralateral DPs suppression between tinnitus ears and healthy ears. However, this result did not show no relationship between tinnitus and the efferent system, since the clinical utility of the suppressive effect of a contralateral sound was restricted from 1 to 2kHz in our equipment. DPs amplitude and its variability were assessed in 1/5 octave steps from 1 to 8kHz. There was a tendency for DPs amplitude and its variability to decrease in tinnitus ears. This result was hardly explained by cochlear mechanism, since variability generally increased when DPs amplitude decreased. Therefore, our data implied the notion that the medial olivocochlear efferents were activated in tinnitus ears.
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  • Ippei Kawajiri, Yukihiko Kanda, Toshinori Satou, Tetsuya Tashiro, Tosh ...
    1999 Volume 42 Issue 2 Pages 88-93
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    We investigated the correlation between the distortion product otoacoustic emission (DPOAE) level and the prognosis of idiopathic sudden hearing loss. The subjects were 21 patients who were evaluated with DPOAE in two weeks of their onsets. They consisted of 14 men and 7 women, and their ages were from 17 to 68 years old. Biologic Scout was used as a DPOAE device. In this study, 18 out of 21 subjects had hearing loss exceeding 60dB hearing level at any one of the frequencies between 500Hz to 8kHz. All 9 patients who had good DPOAE response in spite of hearing loss exceeding 60dB hearing level showed a considerable recovery. In contrast, four out of 9 patients who had poor DPOAE response showed a slight recovery and 5 did not recover at all. The presence of good DPOAE response at corresponding frequencies in spite of hearing loss over 60dB hearing level may be useful for prognostic indication for recovery from idiopathic sudden hearing loss.
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  • Tatsuhiko Harada, Yasuhiko Inoue, Kaoru Ogawa, Jin Kanzaki
    1999 Volume 42 Issue 2 Pages 94-99
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Phase informations of distortion product otoacoustic emission (DPOAE) has been used for calculation of the latency of DPOAE generation, however this measurement is not clinically applied. We invented a novel clinical application of the DPOAE phase information, and propose an idea of utilizing the DPOAE phase for predicting the phase of basilar membrane vibration. The traveling wave is known to show a phase-nonlinearity that the phase lags to increasing stimulus when the stimulus frequency is below the best frequency, while the phase gains when the stimulus frequency is above the best frequency. We found out a similar nonlinear characteristic in the relation between the intensity of lower stimulus tone (L1) and 2f1-f2 DPOAE phase. In seven normal hearing volunteers, the phases lagged to L1 increase when f2/f1 ratio was above 1.22, whereas the phases gained to L1 increase when f2/f1 was below 1.22, and at this ratio of 1.22 DPOAE amplitudes were maximum. This result supported that DPOAE phase can be used as the indicator of the relative phase change of traveling wave of lower stimulus tone at the DPOAE generator of f2 characteristic place.
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  • Takashi Ishida, Kouji Iwai, Shigeru Kuwashima, Sachiko Hirata, Yumiko ...
    1999 Volume 42 Issue 2 Pages 100-105
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Sixty-seven cases of nonorganic hearing loss who visited our clinic between 1989 and 1996 were studied. Females are more frequent rather than males and the male/female ratio is about 1:4. Pure tone audiograms in these cases showed a flat-shaped sensorineural hearing loss in 77 ears (72%) and its hearing level ranged in 30-49dB in most cases Although 37 patients had hearing loss and another cochlear symptoms, 30 cases were found their hearing impairment on audiogram in the school screening hearing test. Twenty-two patients of 30 cases had psychological problems related to troubles of school and family, etc.
    Bekesy audiogram showed type V of Jerger's classification in 67 ears (88%). Bekesy audiometry, ABR and transient evoked otoacoustic emission (TEOAE) recordings were useful for diagnosis of nonorganic hearing loss.
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  • Naohisa Iizuka, Tsunemasa Satoh, Hirotake Chiba, Masaaki Yamane, Akira ...
    1999 Volume 42 Issue 2 Pages 106-113
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    The inconsistency of pure tone averages and speech discrimination scores is often clue to diagnose non-organic deafness. But it can not be enough to diagnose this disease definitely and requires some additional hearing examinations including Bekesy's audiometry, stapedial reflex, Stenger's method, ABR, CNV, and SVR.
    Recently we developed the new hearing tests for non-organic deafness with the binaural sound stimulation, that is, time-shift evoked potentials and midline sound imaging test. The former corresponded to the low tone (500Hz) hearing acuity and the latter revealed the true hearing threshold levels of non-organic hearing loss patient with ease. And these new hearing tests were compared with the ordinary examinations in 21 cases (32 ears) of non-organic deafness and confirmed to be useful for not only the diagnosis but also treatment of this disease.
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  • Tetsuya Tashiro, Yukihiko Kanda, Ippei Kawajiri, Hitomi Tanigawa, Kyou ...
    1999 Volume 42 Issue 2 Pages 114-118
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    103 cases of functional hearing loss during the past 10 years at Nagasaki University Hospital were reviewed. The results were as follows; 70 cases were females and 33 cases were males. 33 cases had a unilateral hearing loss and 70 bilateral. It was found that there were two peaks of incidence at ages of 8 and 14. The chief complaint in 63 cases (61%) was hearing loss, however 54 cases were detected by a routine hearing screening at school. The most frequently observed pattern in pure tone audiometry was “horizontal type” (38 cases) and an averaged hearing level ranged between 30dB and no response, having its peak at 70dB.
    The discrepancy between the results of pure tone audiometry and those of the objective audiological tests such as stapedial reflex test (SR), distortion product otoacoustic emission (DPOAE), auditory evoked brain stem response (ABR), and electrocochleography (ECoG), were found to be important in making a diagnosis as functional hearing loss. Psychological problems related to troubles at school or at home were observed as causative factors, and there seemed to be a trend that the former decreases in recent years and the latter increases.
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  • Takuji Okitsu, Yukiko Takahashi, Masaaki Suzuki, Shigeyuki Kano, Fumik ...
    1999 Volume 42 Issue 2 Pages 119-125
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    We studied functional hearing loss in 35 children of two groups: a screening group (SG) consisting of children with hearing loss found by audiogram in a school hearing test, and a patient group (PG) consisting of those visiting our clinic complaining of hearing problems. The important results obtained were as follows;
    1) Twenty-two (63%) out of 35 cases were from the SG and 12 cases (34%) were from the PG. Females were more frequently found than males in both groups.
    2) Pure tone audiograms revealed flat-shaped sensorineural hearing loss in most cases, but conductive or mixed types were also found in a few cases. All cases in the SG showed bilateral hearing loss, but 9 (75%) cases in the PG showed unilateral hearing loss.
    3) All cases in the SG had neither complaint nor consciousness of hearing impairment, whereas most cases in the PG were aware of hearing loss and/or other ear symptoms.
    4) Psychological problems related to school, friends and family relations were found in 64% of the SG, and those related to trauma and the sound affected ears directly were found in 75% of the PG.
    5) Hearing impairment improved in 83% of the SG and in 67% of the PG within 6 months by only otological treatment, without any psychological approach.
    6) We discussed the treatment for the cases in the SG, in which psychogenic problems can not be found even by detailed anamnesis.
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  • Kyoko Asano, Kaoru Ogawa, Yasuhiro Inoue, Mami Tazoe, Jin Kanzaki
    1999 Volume 42 Issue 2 Pages 126-130
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    In the present study, we investigated the decade-related changes in the psychological factors of psychogenic deafness in children. We divided the subjects into 2 groups; the patients diagnosed from 1986 to 1987 (the former group) and those diagnosed from 1996 to 1997 (the latter group). There was no significant difference in age and sex between both groups. In psychosocial factors, the ‘teasing’ in the factors related to the school life decreased, while the ‘culture-shock’ increased in the latter group. This result may depend on the changes in the life-style of children during a last decade.
    There was no significant difference in the results of the Y-G character test between two groups. However, the adjusted and the hyperadjusted types in the P-F study increased in the latter group. These findings suggested that the psychological characteristics of the children with psychogenic deafness changed during last 10 years.
    Based upon these results, we concluded that the changes in the psychosocial factors and the psychological characteristics of children should be considered in the treatment of psychogenic deafness.
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  • Kaoru Ogawa, Kyoko Asano, Yasuhiro Inoue, Noriyuki Hoya, Satoshi Takei ...
    1999 Volume 42 Issue 2 Pages 131-136
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    In the present study, we investigated the clinical features and therapeutic results of psychogenic deafness in children. We divided the subjects (73 cases, 139 ears) into 2 groups; the patients diagnosed from 1986 to 1991 (the former group) and those diagnosed from 1992 to 1997 (the latter group). There were no significant differences in age, sex, laterality and audiological findings between both groups. In psychosocial factors, the ‘teasing’ in the factors related to the school life decreased, while the ‘culture shock’ increased in the latter group. This result may depend on the changes in the life-style of children.
    There was no significant difference in the prognosis of hearing impairment between two groups. However, there was a tendency that patients with poor prognosis have been increasing in the latter group, suggesting that the changes in the psychosocial factors and the psychological characteristics of children may affect the prognosis of hearing loss in psychogenic deafness.
    Based upon these results, we concluded that the changes in the psychosocial factors and the psychological characteristics of children should be considered in the treatment of psychogenic deafness.
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  • Fumiyo Kudo, Tomoko Tsukuda, Takashi Kanda
    1999 Volume 42 Issue 2 Pages 137-141
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Sixty-seven patients with psychogenic deafness in children were referred to our institution during the last 9 years (1989-1998). In these cases, 61 cases were diagnosed as bilateral deafness and 6 cases were diagnosed as unilateral deafness. In this study we discussed clinical differences in these two types of deafness.
    Our conclusion was as follows.
    Children with unilateral deafness had more clear complaining of deafness than these with bilateral deafness. In bilateral deafness two thirds of patients were detected at the school screening hearing test. In unilateral deafness one of 6 patients was detected at the same test and the remaining 5 patients visited ENT clinic because of hearing impairments, and were diagnosed as psychogenic unilateral deafness.
    Once it was properly diagnosed, the deafness in unilateral cases was easily to be improved. In cases of unilateral deafness it could be easily found out the direct cause which had induced the deafness. As unilateral deafness patients were sometimes diagnosed and treated as sudden deafness at first, much attention should be paid to the diagnosis of unilateral deafness.
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  • Reiko Beppu, Keiko Murahashi
    1999 Volume 42 Issue 2 Pages 142-146
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Psychogenic hearing loss is classified as one of functional hearing loss. Psychogenic hearing loss have psychogenic backgrounds.
    We studied 2 cases which combined psychogenic hearing loss with dissociatied amnesia. The first case was a sixteen-year-old girl who was diagnosed as generalized amnesia in psychiatry department. The second case was a fifteen-year-old girl who already had organic hearing loss and the diagnose of psychogenic hearing loss was not easily established because of her organic hearing loss.
    Patients who have psychogenic hearing loss often need psychotherapy.
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  • Yuichiro Sugio, Takako Namatame, Manabu Matsumoto, Yukiko Iida, Naohik ...
    1999 Volume 42 Issue 2 Pages 147-151
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    We studied cases considered as aggravation (exaggeration) of hearing loss among 341 patients who were seen at our department for compensation of workers' accident as to noise-induced deafness during a period of recent 5 years and 5 months. As the results, examinations on patient's attitude during medical examination, difficulty conversation, information from hearing examiners, repetition of hearing test, self-recording audiometry and ABR should be utilized in diagnosing these cases. In the cases of aggravation (exaggeration) for hearing loss, there are psychological and social factors that led the patients to exaggerate deafness. Therefore we should deal with these cases as the patients who complain of deafness.
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  • Kiyoko Sato, Michinari Okamoto, Seido Oki, Tomoko Sugiuchi, Tomoyoshi ...
    1999 Volume 42 Issue 2 Pages 152-159
    Published: April 30, 1999
    Released: April 30, 2010
    JOURNALS FREE ACCESS
    Among 25 profound hearing-impairment children with one year telephone-communication training, 20 of them were able to establish telephone-communication.
    Their ability in all strategic skills was remarkably improved after the training according to the questionnair answered by mothers. (ability of strategic skills for conversation: listening strategies are “Clarification (ex. Pardon?)” “Request (ex. Could you speek slowly?)” “Reconfirmation” “Confirmation of topic” “Assumption” “Final confirmation”: speaking strategies; “Awareness of pronunciation” “Interval and speed” “Requested modification of vocabulary” “Non-requested modification of vocabulary” “Revision of context.” “Spearking more simply and exactly”), Strategic skills correlating profoundly with telephone-communication (communication only by speech) are the listening strategies and the following speaking strategies: “Requested modification of vocabulary” “Non-requested modification of vocabulary” “Revision of context”.
    This remarkable result of the training is contributed not to speech perception and pronunciation, but to progress of strategic skills. The training develops the strategic skills, and the method is very important for hearing-impairment children.
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