Disease relevance of Acoustic Impedance Tests

• Children with allergic rhinitis or atopic eczema should be investigated by tympanometry for OME [1].
• Brodimoprim resulted more efficacious in the reduction of symptoms, especially hypoacusis and tinnitus (p < 0.05 between treatments); tympanometry showed a higher number of normalizations in the brodimoprim group, without significant differences between treatments [2].

Psychiatry related information on Acoustic Impedance Tests

• In a cross sectional study of 61 patients (102 ears) with sensorineural hearing loss, auditory threshold, tympanometry, stapedius reflexes, TEOAE and DPOAE were measured [3].

High impact information on Acoustic Impedance Tests

• Middle ear analysis by tympanometry and acoustic reflex analysis indicates that, although some patients with OI have a still middle ear system similar to that seen in otosclerosis, the majority display absent acoustic reflexes and increased compliance of the middle ear with notched tympanograms suggestive of anomalous ossicular articulation [4].
• A measurement protocol that includes tympanometry, distortion product otoacoustic emission measurements and high-frequency VRA is recommended for young children receiving carboplatin or other ototoxic drugs [5].
• If TEOEs are absent, impedance audiometry, ABR recordings, and audiometric evaluation techniques are needed to distinguish between conductive and sensorineural hearing loss and to assess hearing thresholds precisely [6].
• METHODS--The stapedial reflex was examined using impedance audiometry in 38 patients with sporadic ALS and in 25 age matched controls [7].
• PATIENTS: From a pool of 1450 children (aged 1-10 years) with SOM, defined by tympanometry as having type B or C2 tympanograms, 429 with SOM of at least 3 months' duration were included in the trial [8].

Biological context of Acoustic Impedance Tests

• After a questionnaire and an ear examination, the following tests were performed: air-conduction pure-tone audiometry in the frequency range of 125-16 kHz, tympanometry, speech recognition score in quiet conditions, transient evoked otoacoustic emissions (TEOAE) and cognitive cortical evoked potentials (MMN, P300, N400) [9].

Associations of Acoustic Impedance Tests with chemical compounds

• The inclusion criterion was a type C2 and type B tympanometry result of at least three months' duration [10].
• Tympanometry revealed middle-ear pressure abnormalities (less than -50 or greater than 20 mm H2O) in at least one ear during 18% of observations in recipients of recombinant interferon beta serine compared with 38% of observations in placebo recipients [11].
• Significant deterioration in both PTA thresholds and TEOAE energy levels (with no change in tympanometry) were detected in the cisplatin group [12].
• Impedance audiometry was carried out under a general anesthetic (ketamine and nitrous oxide) in 60%, and without anesthesia in 40% of the cases [13].
• A randomized trial of nasal beclomethasone for 8 weeks was conducted in children with abnormal tympanometry to identify the effect of therapy upon nasal cytology [14].

Gene context of Acoustic Impedance Tests

• METHODS: Hearing in patients with RA and controls was examined using pure-tone audiometry and tympanometry [15].
• Tubal opening results of this method were compared to the traditional method using preinflation and postinflation tympanometry [16].
• Numerical overestimation of P(m) by tympanometry was explained by hysteresis, which reflected the viscoelastic properties of the MES [17].
• The Physical Volume Test in impedance audiometry [18].
• Clinical assessment of the MHA in normal living ears, within the range 30 degrees to 75 degrees, correlates poorly with MEP measured by impedance tympanometry, within the range of -300 to +160 mm H2O [19].

Analytical, diagnostic and therapeutic context of Acoustic Impedance Tests

• The first group received azithromycin at a dose of 10 mg/kg once daily for 3 days and this regimen was repeated weekly for up to 12 weeks according to the results of tympanometry and pneumatic otoscopy [20].
• Although all except one of the seven patients with suspected tubal dysfunction showed normal results with catheter insufflation and tympanometry, six of the seven showed abnormality and one reported the disappearance of ear stuffiness after the ventilation capacity test [21].

References