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Biomedical subjects

L Monneron

Publications and source records attributed to L Monneron.

7 recordsLinked to original sources
PubMed1998

[Cochlear implant in the aged patient].

Despite the fact that elderly people live frequently alone and frequently have difficulties of vision, is it reasonable to refuse to supply a patient with a cochlear implant only because he is too old? We compare the results of 87 post-lingually implantees as a function of age, less than 60 years (young) and 60 years or more (old). We assessed the implant efficacy using the Protocole Francophone d'Evaluation (PFE), appreciated the speech-therapist's opinion and the patient's satisfaction, and counted the number of hours per day the implant was used (H/D). The PFE score was significantly higher in young than old. However the speech-therapist's opinion and the patient's satisfaction as well as H/D did not differ significantly in the 2 series. Elderly people are supplied with a great benefit from cochlear implants. Therefore age is not a contraindication for implantation.

Adult↗
PubMed1992

[Improvement of clinical results by digitalization of a single channel cochlear implant].

For 1973 we have been among the first to claim the multichannel cochlear implant superiority regarding single channel efficacy. However we actually thing that single channel cochlear implant is indispensable in case of total ossified cochlea, and very useful when efficacy/coast ratio must be considered. In order to narrow the gap between multi and single channel device efficacy, we used the new microprocessors possibilities to digitalize the analogic emietter of the single channel system, which we designed in 1987. Owing to a PC keyboard the new emietter allows the speech therapist to select the frequency band width of the input signal, and to determine the threshold level and the dynamic value as a function of six steps values of the stimulus wave frequency. These improvements supply the patient with a better speech intelligibility excepted for vowels discrimination. Comparison of clinical results obtained through the two analogic and digital systems are reported on 4 post lingually and 4 pre lingually deaf patients.

Adolescent↗
PubMed1992

[Indications and results of cochlear implants in young children].

In order to determine the criteria for patient selection and the preoperative prognostic factors for hearing recovery after cochlear implants in young totally dead children, the results of hearing rehabilitation were studied in 15 children who had undergone cochlear implantation at from 2 to 9 years of age. The choice of implant is determined by the permeability of the cochlear duct. A multi-system should be used, except when the cochlea is totally ossified. The reliability and efficacy of mono and multi system implants make it possible to offer a solution to the urgent therapeutic problems posed by total deafness in the young child.

Age Factors↗
PubMed1990

["Monosonic" one canal digital implant].

In order to decrease the gap between the single and multichannel cochlear implant efficacy we tried to improve the speech coding strategy of the Monomac, the constant current single channel system which we designed in 1987. Owing to a research computerized system, different strategies have been successively studied in the laboratory on 12 new implanted patients during the first weeks of the post-operative period to avoid habituation differences. Results led us to design a miniaturized digital emitter, the Monosonic. This emitter allows the speech therapist to program the frequency band wideness (80-1000 Hz) of the transmitted information, and the threshold level and dynamic range of the stimulating square wave as a function of its frequency. Other strategies are discussed, which have not been yet studied, but may be also programmed.

Acoustic Stimulation↗
PubMed1990

[Results and indications of cochlear implant in 19 cases of total pre-speech deafness].

From June, 1987, to January, 1900, 19 patients aged 3 to 56 years have been rehabilitated for total deafness occurring prior to the acquisition of speech, ie. before age 2, whatever its cause. Some degree of hearing was achieved in all cases. However, the rate and steadiness of progress in auditory recognition, the daily period of use of the device and the changes in the behavior were inversely proportional to the patient's age. This leads to proposing cochlear implants for all patients, especially children, and all the more largely as they are young.

Adolescent↗