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Biomedical subjects

M Zollner

Publications and source records attributed to M Zollner.

5 recordsLinked to original sources
PubMed1986

[Preliminary studies of deaf patients assessed for cochlear implantation].

Two techniques were employed to assess the suitability of deaf patients for cochlear implantation: electrical stimulation by means of ear canal electrode and promontorium electrode. The results of the ear canal tests indicate that the patients may be divided into three groups: I. non-usable dynamics, II. usable dynamics in low-frequency range, and III. usable dynamics over a wider frequency range. Comparable results were obtained via the promontory tests. Since the promontory tests showed a more accurate description of the subjective sensations, it is recommended that this test be performed with those patients who have been preselected on the basis of ear canal stimulation.

Auditory Pathways↗
PubMed1986

[Experiences with the implantation of a multichannel electrode in the acoustic nerve].

The authors developed a surgical approach to the acoustic nerve enabling the introduction of an electrode into the acoustic nerve. A multichannel electrode was implanted by this method in a deaf patient. The receiver casing for percutaneous transmission was fixed in the mastoid. Encouraging hearing results were obtained over a period of two months by electrical stimulation of the acoustic nerve.

Auditory Perception↗
PubMed1981

[Tissue reaction with platinum-iridium insulated electrodes (author's transl)].

Pt-Ir-electrodes were coated with different insulations. Some of the insulations proved to be highly cytotoxic. Pt-Ir (9:1) electrodes coated with "PYRE-M.L." were easy to handle and did not show any cytotoxic effects. A change of electric impedance was found when the voltage was raised and platinum had changed the surface of the cathode.

Animals↗
PubMed1977

[Determination of the impaired ear's frequency selectivity using psychoacoustical tuning curves (author's transl)].

An apparatus for clinical use is described by which simplified psychoacoustical tuning curves can be measured near 500 Hz and near 4 kHz. Data produced by four groups (normal hearing, conductive hearing loss, noise induced hearing loss and degenerative hearing loss) are separately averaged and compared. The first mentioned two groups as well as the third in the low frequency range show good frequency resolution, the others, however, show largely decreased frequency resolution.

Audiometry↗