Biomedical subjects

K Morawski

Publications and source records attributed to K Morawski.

24 records · Page 2Linked to original sources

PubMed1999

[A case of preserved otoacoustic emissions in a child with unilateral idiopathic severe sensorineural hearing loss].

In this study there is presented a case of unilateral, idiopathic, severe sensorineural hearing loss in a child. The inner ear pathology has been confirmed by tonal and impedance audiometry, and brainstem evoked response audiometry. Simultaneously in the same ear normal otoacoustic emission (SOAE, TEOAE, DPOAE) has been recorded. MRI did not reveal any pathology in internal ear canal and cerebellopontine angle. The presented case suggests that there is a possibility of existence of the normal outer hair cell function with simultaneous inner ear cell disorder or first neuron pathology. Similar cases of idiopathic sensorineural hearing losses with preserved otoacoustic emissions in children were described by Katona (1993), Welz-Mueller (1993) and Konradsson (1996).

Acoustic Impedance Tests↗

PubMed1999

[Assessment of otoacoustic emission usefulness for early detection of hearing impairment caused by noise].

74 miners, aged 19-35, exposed to industrial noise were examined by means of otoacoustic emission (TEOAE). The group was divided into 3 subgroups depending on the time of noise exposure. Significant weakening of otoacoustic emission in all subgroups was observed, even in subgroup with the shortest time of noise exposition and normal audiogram. The results were confirmed by others authors. Otoacoustic emission (TEOAE) could be very useful in early detection of hearing impairment cause by noise. 74 miners, aged 19-35, exposed to industrial noise were examined by means of otoacoustic emission (TEOAE). The group was divided into 3 subgroups depending on the time of noise exposure. Significant weakening of otoacoustic emission in all subgroups was observed, even in subgroup with the shortest time of noise exposition and normal audiogram. The results were confirmed by others authors. Otoacoustic emission (TEOAE) could be very useful in early detection of hearing impairment cause by noise.

Acoustic Stimulation↗

PubMed1999

[Otoacoustic emission nonlinear distortions in musicians with absolute and relative pitch].

In the presented study an analysis was performed of the properties of the cochlea using Distortion Product Otoacoustic Emissions (DPOAE). 52 musicians were examined, aged 17-31 years, with systematic musical training longer than 10 years, and 30 non-musicians without musical experience, aged 18-30 years. Then all musicians were tested with Rakowski's test to divide them into the absolute pitch possessors (APP) and relative pitch possessors (RPP). DPOAE recorded in musicians were statistically higher than in nonmusicians for f2 = 1.0, 2.0 and 4.0 kHz for signal intensities generally ranged from 45 to 55 dB SPL. Analogous comparison between APP and RPP showed higher DPOAE for f2 = 2.0 and 4.0 kHz in APP but the differences were not statistically significant. Simultaneously no significant differentiations were observed between investigated groups for highest signal intensities in the whole frequency band. The study suggests that systematic musical training influences the cochlear mechanics assessed by DPOAE and the greatest differences concern the active processes within the cochlea. The continuation seems to be justified.

Adolescent↗

PubMed1998

[Preliminary assessment of transient evoked acoustic emissions (TEOAE) in newborns depending on selected parameters of delivery complications with particular analysis of newborns with hypotrophy].

OBJECTIVES: Transient evoked otoacoustic emission (TEOAE) is accepted as a good and universal test for screening of the cochlea function in newborns. This method is particularly useful in the newborn group with risk-factors of hearing losses. Early identification of the cochlear pathology gives possibility of supplying with hearing aid instrument and rehabilitation. MATERIAL AND METHODS: In this study 300 newborns was tested with TEOAE, besides such parameters as birth mass, Apgar scale, bilirubinemy were analysed. Then the same results of the newborns with hypotrophy consisted of 40 subjects were analysed. RESULTS: The study did not indicate any tendency of changing TEOAE in particular parts within the cochlea in newborns with hypotrophy. Hypotrophy does not seem to influence the cochlea function monitored by TEOAE half-octave band analysis.

Acoustic Stimulation↗

PubMed1997

[Evaluation of dynamic changes in hearing impairment in subjects exposed to noise while testing for transient evoked otoacoustic emission].

A group of 74 miners, aged 19-35 years, exposed to industrial noise at average level of 82-88 dBA for 1.5 to 15 years were examined by means of otoacoustic emission (TEOAE). The group was divided into three subgroups, depending on the duration of noise exposure. The results obtained in miners were compared to the results of the control group nonexposed to noise at the workplace. Otoacoustic emission was weaker in subjects exposed to noise. Significant differences in responses were found in subgroups II and III as compared to controls. The results were compared to the data reported by other authors. The role of otoacoustic emission in providing information about dynamics changes in hearing impairment, depending on the duration of noise exposure, in subjects exposed to industrial noise, was emphasised.

Acoustic Impedance Tests↗

PubMed1996

[A case of gigantic pleomorphic adenoma of the parotid gland].

The case of big size pleomorphic adenoma of the partoid gland was presented. Attention was paid on the necessity of the surgical treatment of pleomorphic adenomas by superficial or total parotidectomies. Possibility of the post operative complications avoidance, even in such big cases was emphasized.

Adenoma, Pleomorphic↗