[Effect of increased stimulus rate on brainstem auditory evoked potentials].
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Brain Stem↗
Biomedical subjects
M Fradis
Publications and source records attributed to M Fradis.
Treatment of perennial allergic rhinitis by sodium cromoglycate plus 0.025 per cent xylometazoline (a double-blind study).
The object of this double-blind study was to assess the therapeutic effects of a combination of two per cent sodium cromoglycate and 0.025 per cent xylometazoline compared with a matched placebo. Forty patients were included in the two-week study. The treatment was found to be rapidly effective taking only a day to control symptoms in almost 80 per cent of the patients in the group receiving active treatment. No evidence of rebound effects due to the decongestant was observed during the study.
Adolescent↗
Auditory brainstem evoked potentials in patients with migraine.
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Adolescent↗
Brainstem auditory evoked potentials with and without increased stimulus rate as diagnostic tool in brainstem minor transient changes.
Two clinical groups of patients - 25 with Parkinson's disease and 17 with migraine - were evaluated using brainstem auditory evoked potentials (BAEP) to regular (10/s) and increased (55/s) stimulus rates. Each group of patients had an age-matched control group. The BAEP data were statistically evaluated, comparing the data of migraine patients during and between migraine spells, and the parkinsonian patients before and after L-dopa treatment. We believe that when group data are compared BAEP to an increased stimulus rate is an efficient tool for detecting even minor transient reversible physiologic changes of the brainstem.
Adolescent↗
Noninvasive recordings of cochlear evoked potentials in Meniere's disease.
Noninvasive meatal electrocochleography simultaneously recorded with brain stem auditory evoked potentials were performed on 24 adult patients with unilateral Meniere's disease. Data from the affected ear were compared with those of the nonaffected ear and with those of ten healthy normally hearing adults. The most striking finding was the significant deviation from the norm of the nonaffected ears' action potential duration. The combination of simultaneously recorded surface meatal electrocochleography and brain stem auditory evoked potentials complement the diagnostic battery of Meniere's disease in ruling out retrocochlear involvement, indicating cochlear involvement of the affected ear, and revealing subclinical changes in the contralateral ears.
Adult↗
Rhabdomyoma of the larynx.
Since 1897 a total of 37 cases of extracardiac rhabdomyomas of the fetal type have been reported in the literature. Only two of these were localized in the larynx. We report an additional case of extracardiac rhabdomyoma localized in the larynx, and the pertinent literature is discussed. Although rare, its existence should be kept in mind in the differential diagnosis of laryngeal tumours.
Aged↗
Auditory brain stem evoked potentials in patients suffering from peripheral facial nerve palsy and diabetes mellitus.
Forty-two patients affected by acute idiopathic peripheral facial palsy (AIPFP) underwent auditory brainstem evoked potential (ABEP) investigation in order to further our understanding of the nature of facial palsy. Twenty-two of these patients suffered from diabetes mellitus. Our results indicate that the AIPFP of the diabetic person may be considered as a preliminary sign of diabetic peripheral neuropathy.
Adult↗
A comparison of auditory brain stem evoked potentials in hyperlipidemics and normolipemic subjects.
Twenty-five hyperlipidemic, neurologically and audiologically asymptomatic patients were compared to 20 normolipemic control subjects regarding different interpeak latency differences (IPLD) of auditory brain stem evoked potentials (ABEP). ABEP were recorded in response to click stimuli presented at a rate of 10/sec and 55/sec. The net effect of increasing stimulus rate (ISR) on IPLD of ABEP was significantly greater in the hyperlipidemic patients for IPLD (V-I) and IPLD (III-I). ISR of ABEP indicates a trend of subclinical impairments of brain stem function in hyperlipidemic patients, probably due to ischemia accelerated by their condition.
Acoustic Stimulation↗
Treatment of Meniere's disease by intratympanic injection with lidocaine.
Intratympanic injection of lidocaine hydrochloride was used to alleviate distressing symptoms of tinnitus and vertigo in 28 patients with Meniere's disease. Of the 28 patients, 82% found an immediate improvement in vertigo, and there was an improvement in tinnitus in 67.8%. There was no change in complaints of tinnitus or vertigo in five patients with Meniere's disease who were each injected with a similar amount of saline into the middle ear, and who acted as a control group. An intratympanic injection of lidocaine alleviated the disabling symptoms of tinnitus and vertigo in some of the patients with Meniere's disease who had not reacted well to medical treatment. The procedure is without the hazards of the intravenous injection of lidocaine, and can be done by every otologist, even in clinic practice.
Adult↗
Structural abnormalities in the stria vascularis following chronic gentamicin treatment.
Freeze-fracture and thin-sectioning have been used to examine the stria vascularis of albino guinea pigs chronically treated with gentamicin. Immediately following the end of treatment, most marginal cells showed lipid bodies in the cell body region and freeze-fracture revealed alterations to the marginal cell plasma membrane. Intermediate cells also showed peculiarities including a dilation of the rough endoplasmic reticulum. A co-incidence was noted in the location in the cochlea in which effects in the stria and in outer hair cells occurred. At 4 weeks post-treatment, the stria was significantly thinner than normal and appeared less structurally complex. A minority of marginal cells degenerated. Some morphological features associated with degeneration resembled those of apoptosis, a process of controlled, cellular self-destruction. There were also indications of turnover of gap-junctions throughout the post-treatment period examined. The results indicate significant ototoxic effects of gentamicin occur in the stria and that changes to plasma membranes are one of the initial alterations.
Animals↗
Recurrent acute otitis media--prophylactic penicillin treatment: a prospective study. Part I.
Recurrent acute otitis media (RAOM) is a distressing clinical manifestation of middle ear pathology, mainly expressed in the first two years of life. In this controlled study, prophylactic treatment by phenoxymethyl penicillin reduced significantly the frequency of RAOM in 60 children, as compared to 48 children who received a short ampicillin course only on the occasion of an acute otitis media episode. The importance of breastfeeding, age at initial episode, the type of treatment given and the pertinent literature is discussed. A working hypothesis of this prophylactic treatment is suggested.
Acute Disease↗
Eosinophilic granuloma of the temporal bone.
Involvement of the temporal bone by eosinophilic granuloma is rare. Four cases are presented here and the pertinant literature is reviewed. This disease must be kept in mind by the otolaryngologist because of the diagnostic and therapeutic problems that may arise. Direct injection of methyl-prednisolone sodium succinate is suggested as a treatment of eosinophilic granuloma in the temporal bone.
Bone Diseases↗
Unusual sites of schwannoma in the head and neck.
Two cases of schwannoma originating in unusual sites in the head and neck are reported. To the best of our knowledge ours is the first case of schwannoma in the nasopharyngeal area to be described. Schwannomas in the parotid area must be kept in mind in the differential diagnosis of parotid tumours. The pertinent literature is reviewed.
Child↗
A comparative cranio-corpography study on the findings in the Romberg standing test versus the Unterberger/Fukuda stepping test in vertigo patients.
Cranio-corpography (CCG) stepping and standing tests are compared in a group of 202 neurotological patients. In these two vestibulo-spinal tests, performed by a simple and precise photo-optic system, the movement of the shoulders and the head--and not the movement of the feet, is taken as the parameter for the investigation. The two tests are complementary one to the other. The CCG should be an integral part of every neurotological laboratory.
Humans↗
Effect of hearing aids on hearing.
We examined 114 patients aged 10 to 91 years with different kinds of hearing aids fitted in one ear only, the unaided ear acting as a control. They were re-examined several times during a period of follow-up from 1 to 9 years comparing the relative change in hearing due to hearing aid usage with various degrees of amplification of the aid. We compared the degree of hearing loss in the aided and unaided ear looking for evidence of a possible change in hearing related to the frequency of hearing aid usage in hours per day and in years, the maximum power output (MPO) and the gain of the aid. According to our findings there is no change in hearing between the aided and the unaided ear at the alpha = 0.05 probability level at least for 8 years. There is no effect of the long-term amplification of the hearing aid on deterioration of hearing comparing the aided ear and the unaided ear, but with high MPO of the aid, the patient should be followed up more frequently than with low MPO amplification.
Adolescent↗
A simple method of measuring the nasal airway in clinical work.
The problem of measuring the nasal airway is discussed, and the previous literature has been reviewed. A simple method of measuring the airway and the degree of nasal obstruction has been proposed.
Humans↗
Sialadenoma papilliferum of the parotid gland.
A case of sialadenoma papilliferum of the parotid gland in a 35-year-old woman is described. The tumor was locally excised and no recurrence was evident after a follow-up period of 30 months.
Adenoma↗