Biomedical subjects

T Van Den Abbeele

Publications and source records attributed to T Van Den Abbeele.

5 recordsLinked to original sources

PubMed1990

[Trends in clinical research for one canal cochlear implantation].

Like any modality of perception, the processes of hearing can be divided up into two levels: modular or primary, and symbolic or central. Multiple-canal implantation is rather applied to the former mechanism, single-canal implantation to the latter. A bank of electrical signals recognizable from each other is being built up. It may be utilized in single-canal systems using this vocabulary to form sentences. The proper phonetic feature to be matched will then have to be selected.

Acoustic Stimulation↗

PubMed1990

[Atypical implants].

There is theoretically no major surgical problem for implantation. The basic techniques all include on an approach through the windows. The authors describe a solution (which has already been used previously) for cophotic hollowing-out cavities, with a suprapetrosal way and an approach on the hidden aspect of the cochlea. The transcutaneous passage can be displaced from the ear lobe to a depression of the auricle.

Cochlear Implants↗

PubMed1990

[Electrophysiologic studies in patients with cochlear implants].

The insertion of reliable extracochlear single-canal cochlear implants in cophotic and subcophotic patients allows the electrical stimulation of the acoustic nerve for rehabilitation, as well as audiovestibular explorations that are no longer possible in the acoustic mode. The authors therefore aim at replacing all these examinations with their Electrical equivalent: --early evoked potentials (E-BERA), --medium-latency evoked potentials (E-MLR), --Event-related evoked potentials (E-P300), for which, to our knowledge, theses are the first recordings, --electrical stapedial reflex, --vestibular stimulations. The method, results and clinical and physiological applications of each method are given, as well as its prospects.

Acoustic Stimulation↗

PubMed1990

[Tinnitus and implants].

The experience with cochlear implantation at Avicenne hospital prompted us to carry out a retrospective study on tinnitus in a population of operated patients. Improvement or disappearance of the symptoms was noted in all cases. These results, which partly match those found in the literature, are probably produced by rehabilitation inhibiting the "deafferentation" mechanisms in analogy with pain phenomena. In some precise cases, which are described, they led us to proposing implantation even though the main, if not sole, complaint of the patient was tinnitus.

Acoustic Stimulation↗

PubMed1990

[Deafness and sarcoidosis].

The cochleovestibular tract is seldom involved by sarcoidosis (about 50 cases have been described since 1948). As a clinical expression of sarcoidosis, deafness is fluctuant in 50% of all cases, bilateral, and most often associated with facial palsy and uveitis, the vestibular reflexes being reduced. The histological studies demonstrate lesions at all levels from the cochlea to be brain stem, but the main mechanism is an infiltration of the arachnoid vessels. The prognosis of sarcoidosis deafness is usually poor in spite of corticosteroid therapy. This paper is illustrated by 3 cases observed in Avicenne Hospital.

Adult↗