摘要:

Five cases of sensorineural hearing loss are presented in which partial or complete recovery of hearing occurred after periods of deafness lasting from three months to more than five years. Three of the cases were diagnosed as Meniere's disease, one as sudden deafness of probable viral origin, and one as idiopathic sudden deafness.A review of the literature reveals brief mention of only a few similar cases, although it is suspected that the phenomenon is not as rare as these isolated reports suggest.It is proposed on the basis of experimental work in animals that the reversible deafness in these patients may be due to temporary obstruction of capillaries in the stria vascularis, which produces strial hypoxia resulting in a reduction in the endolymphatic potential, with consequent hearing loss.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

The goals of acoustic tumor surgery are total tumor removal, intact facial nerve function, and preservation of hearing. The middle fossa approach offers the opportunity to achieve these goals in selected cases. This article presents the findings from the temporal bones of two patients who had undergone middle fossa removal of an acoustic tumor, nine and ten years before their deaths. Hearing was preserved in one case and lost in the other. The patient with profound postoperative deafness showed severe degenerative changes and ossification in the membranous labyrinth. This was explained on the basis of internal auditory artery occlusion. The goals of acoustic tumor surgery are discussed in light of the histopathologic findings in these two cases. The middle fossa approach is advocated as the best available to achieve these goals in intracanalicular tumors.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

The usefulness of the electroacoustic impedance bridge with a probe tone frequency of 0.22 kHz in the determination of the middle ear and mastoid volumes was evaluated in patients with dry eardrum perforations. The values obtained were compared with the volumes determined by an aspiration technique utilizing the gas laws. Also, a comparison was made between the impedance volumes and the size of the mastoid air cell system as measured on x-ray film in a lateral projection. A significant agreement between the two methods of direct volume determination was found. A good relationship was found between the impedance volume and the mastoid air cell area. The impedance audiometry enables a rapid and valuable estimation of the air reservoir in the middle ear in patients with eardrum perforations.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

Measures of phase (lead or lag of target), gain (amplitude of response), and spectral purity (distortion of smooth tracking) were obtained by a cross-power spectral analysis of the stimulus input and the eye movement output. Normal patients showed no central involvement of the pursuit pathways in the central nervous system. Patients with central lesions had marked deficits. At this time it is premature to try to localize the site of lesion on the basis of these raw data. A small sample of known diagnoses have been chosen to evaluate this tracking system. Hopefully, this method will contribute to a better understanding of the neural pathways of vestibulo-oculomotor function and provide diagnostic information.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

Electroneurography, an objective electrophysiologic measurement of a muscle compound action potential, is used to determine prognosis for recovery in patients with facial paralysis. Quantitative results obtained in electroneurography are more objective and more precise than those obtained by more traditional nerve excitability tests. Increased precision, however, is accompanied by 10 percent test-retest variability (p < 0.05) due to trigeminal nerve artifact and other factors. As further understanding and experience are gained, electroneurography measurements should be interpreted in light of clinical findings and more traditional tests.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

Complications of iontophoresis have been discussed in the literature, but to the best of our knowledge, facial paralysis has not been described. A case of facial paralysis with associated nystagmus and vertigo after iontophoresis of an ear with a previously unrecognized tympanic membrane perforation is presented, and the pertinent literature is reviewed.

ISSN:0192-9763    

出版商:OVID    

年代:1982

数据来源: OVID