Prognostic Criteria of Sudden Deafness as Deduced by Electrocochleography

Nishida, Hiroaki; Kumagami, Hidehaku; Dohi, Katsunori

doi:10.1001/archotol.1976.00780150069004

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…Vertigo may accompany sudden hearing loss in 40–60 per cent of patients 25 , 28 , 41 . However, this symptom has been considered a poor prognostic factor 2 , 17 – 19 , 22 , 24 , 27 , 28 , 31 , 37 , 42 , 43 . Recovery rates range from 14 to 40 per cent in the presence of vestibular symptoms 28 , 31 , 44 .…”

Section: Discussionmentioning

confidence: 99%

Impact of prognostic factors on recovery from sudden hearing loss

et al. 2007

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Section: Discussionmentioning

confidence: 99%

Impact of prognostic factors on recovery from sudden hearing loss

et al. 2007

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“…Graham et al [18] reported the differential diagnosis between the coch lear and retrocochlear lesions, and Nishida et al [19] presented suggestive findings of cochlear nerve damage. Hoke and Liitkenhoner [20] mentioned that the AP tuning curve might be distinguished among the hearing disorders of sensory origin, but the AP tuning curve is difficult to obtain in rou tine clinical examination.…”

Section: Discussionmentioning

confidence: 99%

“…Review of the literature shows that domi nant -SP, AP high amplitude [19], SP/AP ratio above 0.27 [22], and high amplitude and unchanged latency of AP [23] in ECochG indicate the good hearing recovery, and the latency prolongation and no detect ability of N i are the signs of poor prognosis [24],…”

Section: Discussionmentioning

confidence: 99%

Pathophysiology and Prognosis of Sudden Deafness with Special Reference to the N<sub>1</sub> Latency

Ikeda

Kusakari

Kobayashi

et al. 1987

ORL

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Electrocochleography (ECochG) was performed in 84 patients with sudden deafness which were classified into 3 groups according to the ECochG findings, i.e. the unchanged N₁ latency, the prolonged N₁ latency and the absence of N₁ response. The cause of hearing loss in the first group was thought to be strial, postsynaptic or mild cochlear damage and that in the second to be vascular, sensory or neural damage. The first group showed a better prognosis than those of the other two.

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“…Such cases show the following types of response: AP low response, only -SP, AP. SP no response (Nishida and Kumagami, 1976). Figure 3 shows a case of complete recovery 20 days after the onset.…”

Section: Sudden Deafnessmentioning

confidence: 97%

Diagnostic Significance of Summating Potential in Sensorineural Deafness

Kumagami¹,

Nishida²

1977

ORL

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The polarity of the summating potential wave induced by electrocochleographical examination has an important bearing upon the pathophysiology or the prognostic evaluation of sensorineural deafness. Electrocochleographical examination was performed on cases of sudden deafness, Ménière’s disease, progressive sensorineural deafness, sensorineural deafness due to barotrauma, etc. When the polarity of the summating potential showed an increased negative wave, physiological blockage in sensorineural structures was revealed. In other words, under such conditions sensorineural structures have a potential for activity although hearing acuity was damaged. On the other hand, when the summating potential has an increased positive polarity wave, gradual decrease of the hearing acuity was revealed.

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Prognostic Criteria of Sudden Deafness as Deduced by Electrocochleography

Cited by 19 publications

References 5 publications

Impact of prognostic factors on recovery from sudden hearing loss

Impact of prognostic factors on recovery from sudden hearing loss

Pathophysiology and Prognosis of Sudden Deafness with Special Reference to the N<sub>1</sub> Latency

Diagnostic Significance of Summating Potential in Sensorineural Deafness

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