摘要:

Providing direct three-dimensional visualization, scanning electron microscopy gives more detailed information about shape, surface and arrangement pattern of the statoconia than all previous methods. Scanning electron microscopic surface views of the guinea pig otolithic membrane are presented, and the relevance of the results is discussed with respect to functional problems and to questions concerning the formation of the statoconia crystals.

ISSN:0301-1569    

DOI:10.1159/000274926

出版商:S. Karger AG    

年代:1970

数据来源: Karger

摘要:

The introduction deals with the description of some achievements of the advanced Danish audiology, and the equipment corresponding to this, in the paedoaudiometric department in the State Hearing Centre in Odense. The author has examined groups of normally hearing children aged from 4 months to 12 years at this Centre. They were outpatient and mostly single examinations which is the most frequent routine method used at the Centre. The audiometric part deals with the results of examination with headphones, in the free field, using pure tones and with special filtred programmes, and of threshold values with and without sound localization. The situation, reaction, interest, cooperation and sound localizing power of the child during examination, and the results at the play-board and with a series of other equipment are the subject of the psychological part. The aim of the investigation was to obtain basic, normal data and information for the Centre to permit the assessment of audiograms in outpatient paedoaudiometric practice as normal or pathological. The results may perhaps be interesting and useful for purposes of comparison for other paedoaudiometric instituts.

ISSN:0301-1569    

DOI:10.1159/000274927

出版商:S. Karger AG    

年代:1970

数据来源: Karger

摘要:

Patients with otosclerosis were tested with pure tone and speech audiometry before and after stapedectomy. Also preoperative tests with hearing aids were done. At evaluation of these audiograms it was found that, in cases with mild or medium otosclerotic perceptive hearing loss, the operative gain was superior to the effect of a hearing aid. With severe inner ear damage the effect of stapedectomy and hearing aids seemed to be equal. In these cases, as well as in those with a relapse of the operative gain, unsuccessful stapedectomies or in border line cases, we used preoperative hearing tests successfully to provide additional information on inner ear function. In severe combined hearing loss, stapedectomy may improve the acoustic situation in view of the adaptation of a useful hearing-aid.

ISSN:0301-1569    

DOI:10.1159/000274928

出版商:S. Karger AG    

年代:1970

数据来源: Karger

ISSN:0301-1569    

DOI:10.1159/000274929

出版商:S. Karger AG    

年代:1970

数据来源: Karger

ISSN:0301-1569    

DOI:10.1159/000274930

出版商:S. Karger AG    

年代:1970

数据来源: Karger