[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.