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Biomedical subjects

C H Chouard

Publications and source records attributed to C H Chouard.

At least 109 records · Page 6Linked to original sources
PubMed1982

[Treatment of dysphonia spastica by recurrent nerve resection (author's transl)].

Fifteen-month follow-up of a patient with severe dysphonia spastica treated by recurrent nerve resection showed that complete recovery had been obtained. Pathological findings, and the results of sonographic, phonographic, glottographic, and electromyographic examinations in this affection are discussed, and an attempt made to deduce the mechanism of action of this resection, and to establish the most valid indications for its employ.

Female↗
PubMed1982

[Contribution of electrical examinations to choice of therapy for facial palsy sequelae].

Two simple to conduct electrical examinations can assist determination of any operative procedure that could be required following peripheral facial palsies. These are percutaneous electrical stimulation of the nerve and galvanic stimulation of the muscle. These simple and reliable tests should be known to the ENT specialist, who must request them whenever necessary and be able to interpret the findings.

Electric Stimulation↗
PubMed1981

[Multiple electrode cochlear implants : clinical results (author's transl)].

Multiple electrode cochlear implants were employed in 34 patients with total deafness (25 cases of acquired deafness of an adult age, and 22 cases of congenital or neonatal deafness). Complications encountered initially (eardrum perforation, receiver breakdown) are no longer observed, but emphasis has also to be placed on the reliability of the electrode-nerve interface, which remained unaltered after a follow-up period of nearly five years. The advantages of the method are that it enables frequency discrimination, followed by that of phonemes and finally words and phrases, without the need for up-reading, results being variable from one case to another. Results are dependent on the effectiveness of the electrode-nerve interface and the intellectual development of the patient. Only measurable objective results are reported.

Adolescent↗
PubMed1981

[Osteoid osteoma of the ethmoid bone (author's transl)].

Osteoid osteoma can be distinguished from compact osteoma by the presence in its centre of a cavity (nidus) which is distinctly visible on tomography or CT scans. Contrary to osteomas, osteoid osteomas are rarely found in facial sinuses. The authors report on one exceptional case located in the ethmoid bone and review the clinical and anatomicopathological features of this benign tumour.

Child↗
PubMed1976

Implantation of multiple intracochlear electrodes for rehabilitation of total deafness: preliminary report.

Many instances of total deafness are due to destruction of the organ of Corti but with partial or complete preservation of the function of the cochlear nerve. In such cases, it is possible to restore some hearing by electrically stimulating the fibers of the cochlear nerve with the help of implanted electrodes. Preoperative testing with electric shocks applied to the round window have aroused sensations of noise in 45 cases of total bilateral deafness with a great variety of etiologies. The only negative results were in two cases of operated acoustic neuromas. Our operation places up to eight intracochlear electrodes, each with a separate fenestration opening into an electrically isolated compartment of the scala tympani. Stimulation of each electrode yields a different sound sensation of a pitch that depends on its location along the cochlea. Electric filters direct different frequency bands to the appropriate electrodes, with the necessary compression of dynamic range. In three experimental cases of unilateral deafness, pitch matches to the normal ear were made. In seven therapeutic operations on adult cases of acquired total bilateral deafness, speech recognition was usually relearned within a month or two. Improvement of voice quality was also dramatic. The intracochlear electrodes have been well tolerated for months, but the method of connection to the external equipment still presents difficulties.

Adult↗
PubMed1975

Acousticofacial anastomoses in Meniere disorder.

It is possible that acute labyrinthine hydrops characteristic of Meniere disorder is related to hyperparasympathetic tone analogous to that observe in rhinorrhea or nasal congestion. This new hypothesis is is supported by anatomical, clinical, and surgical arguments. Anatomically, the ear is supplied by a parasympathetic pathway from the acousticofacial anastomoses of Wrisberg intermediate nerve and the vestibular nerve. These anastomoses are of great importance and appear at a very early stage of embryonal development, much earlier than other parts of the parasympathetic component of the facial nerve. Surgically, vestibular neurectomy via the middle fossa route conserves the anatomy of the inner ear. Together with the vestibular nerve, the acousticofacial anastomoses are removed. This operation results in an improvement of hearing that is far from negligible.

Affective Symptoms↗
PubMed1975

[Meatomyosynangiosis (Ugo Fisch operation) in progressive perceptive deafness. Principles, results and indications].

Meatomyosynangiosis is the operation suggested by Ugo Fisch. It consists of positioning a flap of superficial temporal muscle in contact with the osteoperiosteal and vasculo-neural elements of the internal auditory meatus. In about one third of the cases this operation results in tonal and vocal improvement for patients suffering from progressive perceptive deafness. According to Ugo Fisch, these results are due to retrograde revascularisation of the internal ear starting from the implanted muscular flap. Our own surgical experience confirms these clinical findings. The greatest chance of securing such an improvement is with young patients under fifty and results from this operation in other cases of perceptive deafness are definitely less conclusive and more uncertain. The main indication then for this meatomyosynangiosis is, at present, for progressive perceptive deafness in young patients with no more than 50 Db at lower frequencies. Furthermore, the arteriolar anastomosis pictures we have obtained after this operation was carried out on animals would appear to confirm the physiopathogenetic explanation suggested by Ugo Fisch.

Adolescent↗
PubMed1972

[Facial hemispasm].

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Electromyography↗