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Biomedical subjects

Wiesław Konopka

Publications and source records attributed to Wiesław Konopka.

15 recordsLinked to original sources
PubMed2006

[Hearing evaluation in patients with vertigo].

INTRODUCTION: Vertigo is one of the most frequent and disturbing sensations that the practicing otolaryngologist is called upon to treat. Vertigo is the illusory sensation of motion. True vertigo is caused by pathology in the peripheral end organ, the vestibular nerve, and the pathways that connect them in the brainstem and rarely, in the cortex. AIM: The aim of this study was to evaluate hearing in people with vertigo according to the etiology of balance disorders. The study comprised 127 patients treated in our clinic between 1999 and 2004, 88 women and 39 men (254 ears) aged 24-90 years. The average age was 56. METHODS: Hearing tests (pure tone audiometry, speech audiometry, impedance audiometry, auditory brainstem responses, OAE) as well as vestibular function tests (electronystagmography, rotational chair tests, caloric tests) were performed. In order to evaluate the nature of vertigo radiological diagnostics (head and cervical computer tomography, vascular diagnostics using Doppler sonography) was performed. RESULTS: Audiometric testing showed impaired hearing in 71 of 127 subjects. Among 73 patients with vertigo of vascular origin caused by vertebrae-basilar insufficiency, bilateral cochlear lesion was noticed in 33 cases and unilateral in 9. In 8 patients with cervical ankylosing spondylitis 3 had cochlear hearing loss (1--unilateral, 2--bilateral). CONCLUSIONS: In our group of patients with vertigo in the most of cases the hearing loss was on cochlear origin.

Adult↗
PubMed2006

[Distortion product otoacoustic emissions before and after one year exposure to impulse noise].

INTRODUCTION: Firearms are a common source of impulse noise that may be very harmful to the auditory organ. Impulse noise from weapons and explosions continually produces hearing damage among military personnel. The discovery of otoacoustic emission (OAE) has given a new possibility of early diagnosis of noise induced hearing loss. The transiently evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE) are non-invasive, objective and frequency specific audiometric tests for evaluating outer hair cell function. The aim of the study was to asses the effects of exposure to impulse noise on DPOAE after one year of the obligatory military service. MATERIAL AND METHODS: The study comprised 92 (184 ears) soldiers, subjected to impulse noise during military service. The examine group was divided according total noise exposure. The control group consisted of secondary school students not exposed to noise. DPOAE was recorded before and after one year of military service. RESULTS: After military service significant deterioration of DPOAE level was observed at frequencies of 1, 3, and 4 kHz on the right ear and 2, 5 and 6 kHz left one. CONCLUSIONS: 1. Reduction of DPOAE amplitude connected all frequencies. 2. We did not notice significant differences between groups connected total noise exposure.

Adult↗
PubMed2006

[Evaluation of the risk on hearing loss at soldiers].

INTRODUCTION: Noise produced by weapons may be harmful to soldiers during military service. Exposure to impulse noise during compulsory military service depends on the number of shots, explosion impulses, distance of injured ear from causal firearm as well as on the use of hearing protectors. Weapons produce impulse noises, which are characterized by peak pressure level and frequency. The purpose of this work was to calculate and estimate risk on hearing at soldiers during one year of the military service. MATERIAL AND METHODS: The study comparised three groups of soldiers with different kind of exposure to noise divided according total noise exposure. In order to evaluate the amount of the exposure to impulse noise the total level of noise and the spectrum analysis were performed for all types of weapons, which were used during military service. The equivalent continuous A-weighted sound pressure level, L A eq, Te [dB], maximum A-weighted sound pressure level, L A max [dB] and C weighted peak sound pressure level, L C peak [dB] were measured. RESULTS: The highest total exposure to noise concerned group I (2222,9 kPa(2)/s for right ear and 22212,8 kPa(2)/s for left one) with total exposure time 248,3 minutes. In the II group estimated total exposure to noise was 611,8 kPa(2)/s for right ear and 743,6 kPa(2)/s for left one. In the III group least exposed to noise, estimated total exposure to noise was 103 kPa(2)/s for right ear and 109 kPa(2)/s for left one with total time exposure 17,8 minutes. CONCLUSIONS: Difference between groups is dependent on kind of military service. Estimated exposure to weapons noise may prevent soldiers before hearing loss. We did not notice differences between sites of ears.

Audiometry↗
PubMed2005

[An evaluation of the usefulness of impulse-current stimulation in electrogustometry--preliminary report].

UNLABELLED: Electrogustometry is a simple and fast method of quantitative taste examination. The direct-current monopolar stimulating equipment was most frequently used until now. Aim of the study was to evaluate usefulness of the new method based on bipolar stimulation with impulse-current Furthermore, the authors wanted to determine taste thresholds using the equipment. MATERIAL AND METHODS: 50 healthy volunteers (25 women and 25 men) in the age of 17-50 were involved. The volunteers had a careful otolaryngological examination. Then the taste thresholds for each quarter of tongue were determined using the new equipment. Additionally, ten of the group of volunteers was examined in accordance to repetition time values. RESULTS: the determined values showed symmetry of taste thresholds, among the range of 4.9-26 microA for anterior 2/3 of the tongue and 41.5-93 microA for the 1/3 posterior. The examination with consideration to repetition time did not show increase of taste threshold after ten minutes stimulation. CONCLUSIONS: in conclusion the new kind of electrogustometry is precision and repeatable taste diagnostic method. Moreover the way of stimulation does not cause the phenomena of fatigue and adaptation.

Adolescent↗
PubMed2005

[Impulse noise influence on hearing].

UNLABELLED: Impulse noise from weapons and explosions produces hearing damage among military service. The discovery of otoacoustic emissions (OAE) has given a new possibility of early diagnosis of noise induced hearing loss. The aim of the study was to assess the effects of exposure to impulse noise on TEOAE, SNR and PTA. MATERIAL AND METHODS: the study comprised 92 (184 ears, aged 18.5-20 years) soldiers, subjected to impulse noise during one year of military service. The soldiers were divided in to three groups according exposure to noise. Group I the highest exposure 2222, 9 kPa2/s, group II--611, 8 kPa2/s and group III--103-109 kPa2/s. The control group consisted of 60 (120 ears) secondary school students. Hearing evaluation was performed before and after one year of military service, using extended pure tone audiometry, tympanometry, TEOAE and SNR. RESULTS: after military service significant deterioration of hearing was observed on average 1-2 dB for 0.125-3 kHz and 4-6 dB for 4-12 kHz for all examined soldiers without differences between groups. TEOAE reductions were registered predominantly at frequencies of 3 and 4 kHz, for both ears and SNR mean values reduction for the frequencies of 2, 3 and 4 kHz. CONCLUSIONS: TEOAE especially in cases where clinical audiometry is less sensitive can monitor small changes in the cochlea. There were no differences between groups and ears.

Acoustic Impedance Tests↗
PubMed2005

[Sarcoidosis limited to the lymph nodes of the neck].

A case of isolated neck sarcoidosis is presented. Isolated sarcoidosis confined to the neck lymph node is rare. Sarcoidosis is a systematic disease usually involving pulmonary findings. Extrapulmonary involvement including the liver, eyes, lymph nodes, central nervous system, muscles and bones is common. This report documents a very rare case of isolated sarcoidosis of the neck, which is very rare diagnosed by otolaryngologists.

Aged↗
PubMed2005

[Phlegmon neck and face as a complication peritonsillar abscess--case report].

The authors describe a 46-year-old male patient. Inflammatory state of tonsils and peritonsillar abscess caused a serious complication which came to parapharyngeal phlegmon and superficial soft tissue phlegmon face and neck. A wide application of antibiotic gives a rare complication, but mortality reaches a few percent. A basic method is a surgical treatment--a wide cut of tissues in many places, to drainage interfascia space and compound aim intravenous antibiotic therapy.

Cellulitis↗
PubMed2005

[Otoacoustic emissions and recruitment].

INTRODUCTION: Typical high frequency hearing loss is accompanied by an exaggerated response to loudness as the sound level exceeds your elevated thresholds. This exaggerated response to sound levels is termed "recruitment". Recruitment is a paradoxical phenomenon present in hearing losses due to cochlear damage. Loudness recruitment is usually present to some degree as measured on the SISI. There have been many explanation connected this phenomena so far. It has been suggested that otoacoustic emissions might be more sensitive in assessment of changes to the cochlea caused by noise than pure tone audiometry. MATERIAL AND METHODS: In the present study results of the short increment sensitivity index test (SISI), DPOAE as well as slope of DPOAE input/output (I/O) function were compared before and after noise exposure. The I/O function plots DPOAE amplitude as a function of the level of the primary tones, for the progressively increasing stimulus levels (from 45 to 70 dB SPL) for the frequencies 1, 2, 3, 4, 6, 8 kHz. From 40 patients between 18-21 years, 30 ears were extracted with cochlear lesions and good hearing. RESULTS: Both, PTA and DPOAEs amplitude showed in this group significant reduction due to noise exposure. Slopes of the DPOAE I/O function were depended on stimulus levels. For the low intensity stimuli levels (45-55 dB SPL) we obtained DP I/O amplitude value worse than before noise exposure. When stimulus level was above 55 dB SPL for the frequencies (1, 2, 3, 4, 6, 8 kHz) the amplitude and DP I/O slope was higher than before noise exposure. We did not notice that phenomena in persons without cochlear lesions. CONCLUSIONS: Our results showed that in examination group with cochlear lesion I/O DP amplitude was higher using stimulus level above 55 dB SPL. This notice can be otoacoustic recruitment phenomena.

Acoustic Stimulation↗
PubMed2005

[Middle ear schwannoma--case report].

Schwannoma is one of the common benign middle ear space tumors. The tumors may present with facial nerve paresis or palsy, otologic symptoms and/or parotid mass middle ear schwannomas may originate from the nerves of the tympanic caviti or by extensions from outside the middle ear space. Schwannomas of the facial nerve can occur along any segment, but they frequently involve the geniculate ganglion and extend proximally or distally from there. MRI and CT imaging characteristics are similar to those of vestibular schwannomas. We present the clinical and radiologic features of a middle-space schwannoma originating from facial nerve. The patient underwent middle ear exploration and mastoidectomy. The tumor was of facial nerve origin and was separated from middle ear. The pathologic diagnosis was schwannoma.

Adult↗
PubMed2004

[Analysis of vascular vertigo due to cervical spondylosis and vertebro-basilar insufficiency based on sex and age in clinical materials].

According to examination of 97 patients with vascular vertigo the dependence on vertigo to vertebral spondylosis and insufficiency vertebro-basilar artery was showed. Vertebral degeneration was noticed in 70.1%, basilar artery insufficiency in 42.3% of the patients. In 75.6% of the patients there was noticed both of above symptoms. Rotary test showed labyrinth asymmetry in 41.2% and in caloric test 50.5% of the patients.

Adult↗
PubMed2004

[Assessment of acoustic environment and its effect on hearing in jet engine technical personnel].

BACKGROUND: Noise produced by jet engines may be harmful to aircraft servicing personnel because of high levels of acoustic pressure. The aim of the study was to assess the acoustic environment of persons exposed to jet engine noise and its effect on hearing. MATERIALS AND METHODS: Noise measurements were performed on three jet engines. During the target practice, the following parameters were measured: equivalent noise, pressure level A, maximum sound pressure level A, and peak sound pressure level C. The spectro-analysis covering the range from 0.1 to 20 kHz was conducted. Hearing was assessed in 50 noise-exposed men, aged 24-51 years (mean age, 35.5 years), using PTA, tympanometry and DPOAE. The control group consisted of 40 non-exposed persons with good hearing condition. RESULTS: Maximum levels of acoustic pressure exceeded Polish standards. Comparison between two groups showed that PTA was higher in the exposed persons by 6.3-6.8 dB on average and DPOAE was reduced in the group exposed to jet engine noise more than it could have been expected. CONCLUSIONS: Even during a single test, aircraft technical personnel was exposed to (audible) noise that significantly exceeded admissible values. The reduction in DPOAE values in persons exposed to noise of jet engines was incommensurably higher than changes in PTA.

Acoustic Impedance Tests↗
PubMed2002

[The value of exploratory anterior tympanotomy in differentiating causes of conductive hearing loss and assessment of their treatment results].

The aim of examination was value of exploratory anterior tympanotomy in differentiation causes of conductives hearing loss and assessment of results treatment. Materials of examinations determined 34 patients aged 15-66 years, treated in 1995-2000 years, who qualified to exploratory anterior tympanotomy in aim decision of cause of conductives hearing loss. Among of examined were 14 patients with suspicion of otosclerosis (41.2%), 12 patients with unclear etiology of hypoacusis (35.3) and 8 patients with deterioration of hearing after stapedectomy (23.5%). Preoperative diagnostic embraced: a history, otolaryngologic examination, full audiologic examination and chosen cases of radiologic assessment of temporal bone by computer tomography. After perioperative decision cause of conductive hypoacousis were performed of operations of improved hearing and comprised of average hearing loss by CPT and PTA pre- and postoperative treatment. After performed of exploratory tympanotomy there vere stated following causes of conductive hypoacusis: otosclerosis (61.8%), separated of prosthesis after stapedectomy (14.7%) synechia of prosthesis with tympanic membrane (8.8%) and in singles causes of ossicular synechia in tympanic cavum (5.9%), tympanosclerosis (5.9%) and vitium of middle ear (2.9%). The best of hearing improvement after repairment operations of conductive system were obtained in cases of stapedectomy, exchange of prosthesis after stapedectomy, reconstruction of system by TORP prosthesis, however smaller improvement after operations of synechias of stapes prosthesis with surroundings and postoperation of tympanosclerosis.

Acoustic Impedance Tests↗
PubMed2002

[Personal long-term reproducibility of the TEOAE time-frequency distributions].

The TEOAE signal is relatively short and content changes in time. Due to the fact that signal is very short (20 ms) a special approach must be applied for the analysis of this nonstationarity. Usually the spectral estimation in TEOAE is based on procedures directly employing the fast Fourier transform (FFT). Because TEOAE signal is non stationary the classical Fourier analysis is not adequate for this signal. The aim of our study was the personal comparison of the TEOAE spectograms by using Wigner-Ville distribution (WVD) before and after one year period. Material consisted of 152 men (304 ears) in the age between 18-19 year with good quality OAE. After one year period the comparison of WVD spectrograms showed the highest similarity in the 274 ears (90%), less in the 24 (8%) and in 6 (2%) similarity was not noticed. Personal similarity of the spectrum TEOAE and differences between individual people's ears despite a long time, give a proof about individual architecture of outer hearing cell and maybe useful in the biometrics as a ear-print.

Adult↗
PubMed2002

[Assessment and analysis of the acoustic environment of soldiers exposed to impulse noise].

The aim of the study was to assess the acoustic environment of soldiers attending a one year basic military service. The study material comprised 13 types of weapons used by this group of soldiers. During the target practice, the following parameters were measured separately for the right ear and the left ear: equivalent sound pressure level A (LA eq, Te); maximum sound pressure level A (LA F max) and peak sound pressure level C (LC peak). The measurements covered several single shots or a shot series. In addition, a spectroanalysis in 1/3-octave band frequency of 40-50,000 Hz, was conducted. There were following values of measurements in the direct vicinity of the ears: LA eq, Te fell within the range of 106.2-119.5 dB (mean, 112.2 dB) for the right ear and 104.2 dB-118.4 dB (mean, 113.2 dB) for the left ear; LA F max within the range of 124.5-132.3 dB (mean, 128.3 dB) for the right ear and 116.3-135.1 dB (mean, 128.1 dB) for the left ear; LC pcak within the range of 151.8-156.5 dB (mean, 154.8 dB/155 dB) for the right ear and 151.9-156.2 dB (mean, 155.4 dB) for the left ear. In the noise spectrum, components of audible frequencies predominated, 160-300 Hz (mainly for high caliber weapon); 1600-6300 Hz for the right ear and 2500-4000 Hz for the left peak (small caliber weapons); 6300-16,000 and ultrasonic 25,000-50,000 Hz. No significant differences were found in the measurements of the right ear and the left ear.

Adult↗