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Biomedical subjects

C Parahy

Publications and source records attributed to C Parahy.

10 recordsLinked to original sources
PubMed1990

[Subcophosis and otosclerosis. Medical and surgical treatment].

The spiral ligament of the stria vascularis is nearly always damaged by otosclerotic foci when the patient is nearly totally deaf because of otosclerosis. Vascular drugs are to be prescribed in such a case, besides the Sodium Fluoride treatment. The Sodium Fluoride is, according to us, the best treatment to arrest the progression of the otosclerotic disease. Sodium fluoride will destroy the proteolytic enzymes damaging the inner ear membranes and the hair of the Corti hair cells.

Audiometry↗
PubMed1988

[Sound injuries after surgery of otosclerosis].

Surgery for otosclerosis means that the sound protection due to the fixation of the footplate does not exist anymore. As the Corti hair cells have been fragilized by proteolytic enzymes, it is absolutely necessary to reconstruct the sound mechanism in order to maintain the vibration of the perilymph absolutely within acoustical physiologic limit of movement. The means to realize this reconstruction are presented in this paper, as well as the results.

Hearing Loss, Noise-Induced↗
PubMed1986

[The development of tinnitus in the postoperative period of otospongiosis].

Correlation between tinnitus and audiometric loss, modification of tinnitus by medical or surgical treatment, allow to suspect the origin of tinnitus due to otospongiosis and to give the patient a practically always confirmed prognosis. Audiometric localization of tinnitus is essential, as it is the best clue to etiology, treatment and prognosis of otospongiosis tinnitus. As far as irreducible tinnitus are concerned, as anxiety is the most pejorative parameter, not discouraging the patient is very important.

Audiometry↗
PubMed1985

Temporal bone fractures. State of the art review.

Advances in technology and otomicrosurgery have dramatically changed the management of temporal bone fractures. Based upon our experiences and a review of the literature, the following recommendations are made: The complete temporal bone surgeon should have access to a late-generation CT scanner and have a good working relationship with a neuroradiologist. The surgeon should be capable of repairing the facial nerve within the internal acoustic meatus, by both middle fossa and translabyrinthine approaches. It is advantageous to follow the progress of cochlear implantation. One should be knowledgeable about the electrophysiologic diagnosis of facial paralysis and know when to be conservative in facial palsy secondary to head trauma.

Adolescent↗
PubMed1985

[Improvement in hearing as a function of type of platinectomy or platinotomy performed in the surgical treatment of otospongiosis].

The footplate fenestra should be performed in its posterior third part to avoid pressure of the piston on the membranous labyrinth, situated very close to the footplate in 2% of the cases in otosclerotic patients. Gain in bone conduction differs according to the size of the fenestra performed. Low frequencies improve most when the whole posterior third part of the footplate is removed; the audiometric gain is better for high frequencies when a 0.8 mm stapedotomy is performed. These findings demonstrate the interest of a more or less enlarged fenestra according to the language spoken by the patient, since the different languages use mainly high or low frequency phonemes.

Audiometry↗
PubMed1985

[Prognosis for tinnitus after surgery for otospongiosis].

Correlation between tinnitus and audiometric loss and modification of the former by both surgical and medical treatment provide sufficient data to suggest its origin and to give the patient a prognosis confirmed in practically every case. Audiometric localization of the tinnitus is essential, since this allows establishment of the etiology, treatment and prognosis of the symptom. When tinnitus is irreversible, the hope of a possible recovery must be given to the patient to avoid the inevitable anxiety produced.

Adjustment Disorders↗
PubMed1984

Otosclerosis and otospongiosis: clinical and histological comparisons.

The simultaneous occurrence of otosclerosis and otospongiosis in the same lesion is well documented. The logical sequence of events would seem to be softening and destruction of the bone by the otospongiotic lesion, which is subsequently converted to otosclerosis. Examination of 46 temporal bones has led us to further classify the lesion as: 1. an active lesion, both otospongiotic and otosclerotic, 2. an inactive lesion, also both otosclerotic and otospongiotic, or 3. a fibrous lesion. Hyalinization of the spiral ligament only occurs adjacent to active otospongiotic or very large otosclerotic lesions. If the lesion adjacent to the spiral ligament is inactive, there is no hyalinization. It seems illogical that a hyalinized spiral ligament will return to normal when the lesion changes from active otospongiosis to inactive otosclerosis. Otospongiotic and otosclerotic lesions are found side by side at the periphery of lesions, and both are adjacent to normal bone. These findings have implications concerning the mode of action of sodium fluoride and other medications that are under evaluation for the control of the sensorineural hearing loss due to otosclerosis.

Aged↗
PubMed1984

[Means of fixing a transmission device to the center of a mobile footplate].

The authors present a new fixation device for any bony or prosthetic transmission system to the center of a mobile footplate in the absence of the stapes crura. It is a disc-shaped silicone sponge, with a central hole, fitting the bottom of the oval fossa and thus securing the maintenance of the bony or prosthetic transmission in the center of the mobile footplate, and reducing the risk of shifting of the transmission system, which is always possible in case of tympanic retraction. The silicone sponge allows as well a more physiological transmission, because the footplate will vibrate from top to bottom thanks to a central force vector, thus giving better audiometric results. The biocompatibility of the silicone sponge eradicates any phenomenon of intolerance from the tissues.

Audiometry↗
PubMed1983

Otosclerosis: relationship of spiral ligament hyalinization to sensorineural hearing loss.

The sensorineural component of a mixed hearing loss due to otosclerosis is generally accepted as due to the otosclerotic lesion. The existence of pure cochlear otosclerosis without stapes fixation has been questioned. However, we are documenting 7 such cases in a separate publication. Results of this study, which evaluates 46 temporal bones with clinical or cochlear otosclerosis, demonstrate that the degree of sensorineural loss is directly related to the amount of hyalinization of the spiral ligament. The hyalinization occurs adjacent to active otospongiotic lesions but not next to inactive otosclerotic lesions. Both types of lesions may involve the cochlear endosteum. Small channels through the endosteal bone from the lesion to the spiral ligament have been found. The hyalinization spreads laterally from these channels. The hyalinization is presumably a result of the passage of toxic substances (proteolytic enzymes) from the lesion to the ligament. Strial atrophy is most pronounced on ligaments with the greatest degree of hyalinization. Hyalinization in only one ear produces decreased hearing compared to the other ear.

Cochlea↗