摘要:

The present report is based on the analysis of clinical data collected from 80 patients with cerebellopontine-angle tumors. Special reference is made to the history of the patient, the neurootologic test battery, particularly to the sensitivity and specificity of audiological and vestibular diagnostic procedures. The postoperative findings are evaluated especially with respect to postoperative morbidity and the preservation of facial nerve and auditory functions.

ISSN:0301-1569    

DOI:10.1159/000276202

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

ABR waveforms were analyzed in 63 subjects with tumors of the pontocerebellar angle. The tumors were diagnosed by CT scan and the diagnoses were surgically confirmed. According to the latency changing and amplitude size, the ABR waveforms were classified into seven types (0, A, B, C, D, E and F). All tumors were divided into groups (depending on size), and into subgroups (depending on type). Types 0–E were found in tumors of all sizes. Type C of the brain stem response (BSR) waveform (only 1 deflexion present) was revealed in 75 % of tumors greater than 20 mm. In this case tumor size may be predicted with the significance level of 5 %. Type F of the BSR waveform was found in tumors other than neuromas. Contralateral BSR is affected by tumors greater than 20 mm, and from the statistic point of view significantly more often by neuroma (significance level 5 %) than by other tumor

ISSN:0301-1569    

DOI:10.1159/000276203

出版商:S. Karger AG    

年代:1991

数据来源: Karger

ISSN:0301-1569    

DOI:10.1159/000276204

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

Serial electrochochleogram (ECochG) recordings were obtained over a long time span from 24 patients with Ménière’s disease showing dominant negative SP. The long-term fluctuation of responses (especially SP) was evaluated. Dominant -SP or abnormally increased SP/AP ratio has been unchanged over long periods in most operated or nonoperated patients. It is assumed that the generation of – SP dominance may chiefly result from the malfunction of hair cells, which may be caused by abnormal changes in inner ear fluids associated with endolymphatic hydrops or by other unknown disturbances in the cochlea. The mechanical factor of basilar membrane displacement can hardly be considered as a main cause of SP abnorm

ISSN:0301-1569    

DOI:10.1159/000276205

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

A behind the ear-wearable speech processor for the Vienna cochlear prosthesis has been designed. In a comparative study 6 patients used the new device for 1 week and were then tested. The results from the auditory test battery and a speech tracking were about the same, only the perception of speech from an open list was better when the patients used the conventional processor. It is possible to reduce the size of a speech processor substantially by modifying the speech-processing strategy without major decrease of the performance. More patients have to be tested after using the device for a longer time.

ISSN:0301-1569    

DOI:10.1159/000276206

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

The present paper deals with rather rare burn injuries of the tympanic membrane and middle ear. Literary resources of this topic are scarce. On 36 thermal injuries of the ear, the conservative treatment results have been evaluated from the anatomical and functional points of view. The discussion is aimed at the mechanisms of injury, pathogenesis and results of treatment of middle ear burns. Importance of prevention is emphasized.

ISSN:0301-1569    

DOI:10.1159/000276207

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

An olfactory function test in 18 patients with Parkinson’s disease (PD) and 10 age-matched control subjects was performed. Both detection and recognition thresholds were measured with five kinds of synthesized odorants (T&T olfactometry). Before each test, rhinoscopic inspections were performed to exclude subjects who could have respiratory hyposmia. Both detection and recognition thresholds in patients with PD were significantly elevated in comparison with those of control subjects. Auditory acuity of PD patients, however, was well preserved and there was no significant correlation between auditory and olfactory threshold. On the basis of the present study, the authors conclude that olfactory dysfunction is one of the characteristic symptoms of PD and it may be attributed to lesions in the olfactory neural pathway including olfactory neuroepitheliu

ISSN:0301-1569    

DOI:10.1159/000276208

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

The electrophysiological study of cochlear microphonics (CM), whole nerve action potential (AP) and endocochlear potential (EP) were examined. (1) With the extension of the exposure time of 500 Hz tone, a decrease of CM maximum output voltage in test frequency from 2 to 6 kHz was observed. (2) N1 potential of AP decreased very significantly by 500 Hz tone exposure. (3) A very pronounced decrease of the absolute value of the negative potential of the EP in 500 Hz exposure was seen.

ISSN:0301-1569    

DOI:10.1159/000276209

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

The transendothelial passage of horseradish peroxidase (HRP) and diffusion of HRP into the pericapillary space, injected intravenously into cats, was studied at the light and electron microscopic level in the mucosa of the eustachian tube. The permeability of capillaries in the pharyngeal two-thirds of the tube was higher than in the tympanic one-third though all the subepithelial capillaries were of the continuous type. In the lamina propria of the subepithelium in the pharyngeal two-thirds much HRPwas found 10 min after its intravenous injection, but in the tympanic one-third, it was absent in the perivascular spaces. The capillaries of the pharyngeal two-thirds had many projections and marginal folds inside the capillary lumen, and large pinocytotic vacuoles containing HRP as well as many micropinocytotic vesicles. On the other hand, the capillaries in the tympanic one-third had many micropinocytotic vesicles too, but only a few large pinocytotic vacuoles.

ISSN:0301-1569    

DOI:10.1159/000276210

出版商:S. Karger AG    

年代:1991

数据来源: Karger

摘要:

The radial forearm flap has become a versatile tissue transfer in head and neck surgery, especially in the reconstruction of the pharynx and oral cavity. Still, many surgeons avoid its application because of the possible donor site complications. In 29 of 51 patients who were operated between July 1987 and April 1990 at the Department of Otorhinolaryngology in Tubingen, we evaluated the function and aesthetic appearance of the radial forearm donor site after surgery. We found a much lower complication rate compared to some reports in the literature. With a questionnaire, the patients were asked how they judged the function and appearance of the forearm donor site. Further tests were made to detect a possible reduced mobility of the hand, and to measure the strength of the hand. Postoperative complications and their management as well as our concept of dealing with the radial forearm flap donor site to minimize complications are discussed.

ISSN:0301-1569    

DOI:10.1159/000276211

出版商:S. Karger AG    

年代:1991

数据来源: Karger