Disease relevance of Audiometry, Evoked Response

• Ten patients (4-19 years of age) with cystic fibrosis underwent evoked response audiometry at regular intervals following a 400 mg dose of nebulized tobramycin; the concentrations of tobramycin in samples of blood taken at the same time intervals were also determined [1].
• Electrocochleography and intranasal allergen challenge as investigational tools in patients with inhalant allergy and Ménière's disease [2].
• A patient with "far-advanced" otosclerosis with a profound bilateral hearing loss was evaluated for cochlear reserve using transtympanic electrocochleography (ECoG) and promontory stimulation [3].
• The evoked response audiometry was abnormal in 4/23 (17%) newborn infants with isolated tags or pits, and revealed both conductive and/or sensorineural hearing impairment [4].
• Patients with an initial mean hearing level below 80 dB, or in whom the glycerol test and electrocochleography results suggested the presence of endolymphatic hydrops, had a good hearing outcome [5].

Psychiatry related information on Audiometry, Evoked Response

• Rats showed deteriorated auditory thresholds in the mid-frequency range, based on electrocochleography, after 550-ppm ethyl benzene (8 h/day, 5 days) [6].

High impact information on Audiometry, Evoked Response

• Toluene ototoxicity in rats: assessment of the frequency of hearing deficit by electrocochleography [7].
• After the baseline studies, the patients received 4 g of sodium chloride daily for 3 days before repeat electrocochleography [8].
• In addition to the previously reported clinical manifestations (i.e., early deterioration of intelligence, microcephaly, peculiar stereotypic hand movements, and epilepsy), 2 other features were observed in these patients: abnormal evoked response audiometry and low content of the elements, copper and zinc in the hair [9].
• Extratympanic electrocochleography was performed on three patients following tobramycin injection and ten patients during cisplatin (cis-dichlorodiamine platinum II infusion [10].
• These tests include transtympanic electrocochleography, the acetazolamide cochlear hydration test, vestibular aqueduct tomography, and caloric testing [11].

Chemical compound and disease context of Audiometry, Evoked Response

• Eight patients receiving prolonged treatment with gentamicin for bacterial endocarditis were monitored for possible ototoxicity using transtympanic electrocochleography as an adjunct to pure tone audiometry, vestibular function tests and serum gentamicin levels [12].

Biological context of Audiometry, Evoked Response

• Simultaneous intraoperative electrocochleography and eighth nerve action potentials were used to monitor auditory function in the last fourteen cases using an Amplaid Mark V evoked potential signal processor [13].
• In this study, the effects of inhalation of the possibly ototoxic solvent ethyl benzene on the cochlear function and morphology were evaluated using three complementary techniques: (1) reflex modification audiometry (RMA), (2) electrocochleography and (3) histological examination of the cochleas [14].
• Auditory Brain-stem Response (ABR) Audiometry, also called Brain-stem Evoked Response Audiometry, is an effective procedure for assessing the hearing of children who cannot or will not perform satisfactorily on behavioral audiometric tests [15].

Anatomical context of Audiometry, Evoked Response

• 4. In the hearing disturbance model, a compound cochlear nerve action potential was recorded by electrocochleography every minute after the beginning of photoirradiation in the presence of Rose Bengal [16].
• However, with judicious use of ABR, electrocochleography, and transcranially and ipsilaterally elicited middle-ear muscle reflexes, certain forms of central dysfunction can be studied physiologically [17].

Associations of Audiometry, Evoked Response with chemical compounds

• METHODS: Patients were tested twice using electrocochleography: once as a baseline and again 20 minutes following intranasal challenge with the allergen to which they were most sensitive [2].
• Electrocochleography (ECoG) and glycerol test were performed in 51 Meniere ears [18].
• Ketamine anaesthesia for electrocochleography in children. Are psychic side effects really rare [19]?
• Electrocochleography was performed on three patients to monitor the intravenous administration of tobramycin [20].
• Clinical monitoring of the effects of gentamicin by electrocochleography [12].

Gene context of Audiometry, Evoked Response

• In addition, AP suppression functions, across frequency, have been obtained in human subjects with (near) normal hearing thresholds, and in patients with sensorineural hearing loss of cochlear origin, during transtympanic electrocochleography [21].
• A method of diagnosis and evaluation using evoked response audiometry (ABR) is reported [22].
• The similarities across frequencies between the human SP (promontory) and the experimental SP (DIF component from basal turn) suggest that the SP recorded in electrocochleography originates mostly from the base of the cochlea; negative values were observed at low frequencies (1 to 2 kHz), positive values at high frequencies (8 kHz) [23].
• As EAEP wave I is identical with the potential N1 in electrocochleography and corresponds to activity of the most distal part of the acoustic nerve or the spiral ganglion, it is concluded that the peripheral part of the acoustic nerve is involved in about 10% of MS patients [24].

Analytical, diagnostic and therapeutic context of Audiometry, Evoked Response

• Transtympanic (TT) electrocochleography (ECochG) data recorded with click stimuli and tone bursts (1, 2, 4, and 8 kHz) were evaluated in 50 patients with Meniere's disease and compared with the data from control groups of 10 sensorineural hearing impaired patients and 5 subjects with normal hearing [25].
• Before perfusion with streptomycin and creation of a shunt in the lateral semicircular duct, the pressure in the lateral semicircular duct is measured while electrocochleography is being recorded [26].

References