PubMed Health⌕ Search

Biomedical subjects

J Sekuła

Publications and source records attributed to J Sekuła.

At least 19 recordsLinked to original sources
PubMed1994

Fourier analysis in the objectivisation of auditory brain stem responses in newborns.

Fourier analysis (FFT) of auditory brain stem responses induced by stimuli of 90, 70 and 40 dB HL was carried out in group of 45 full-term and pre-term neonates. It was stated that with postnatal newborn's development complex IV/V was observed more frequently for the more immature newborn. It influences also the power strength spectrum obtained. In responses with IV/V complex the frequency range is considerable and significantly reduced by about 100-200 Hz. It was observed that general state of newborn at the birth influences the frequency range as well as from the shape of score reproducibility and reliability of spectrum is significantly better. It was noticed also that the shape and form of spectrum in about threshold and threshold responses is significantly similar irrespective of the intensity of threshold stimulus. The shape and form of responses spectra for stimuli of 30-40 dB HL (in a group of children with normal hearing) and of 80-90 dB HL (in a group of children with severe hearing impairment) are identical. The above findings allow us to show the importance of Fourier analysis for objectivisation of subjective evaluation of auditory brain stem responses.

Auditory Threshold↗
PubMed1994

Maturation of the acoustic path-way in brain stem responses (ABR) in neonates.

In a group of 130 tested children, 102 of whom had a property evaluated brain stem responses, we tested the influence of newborn maturation on values of response parameters, their configuration and threshold values. It was shown that newborn maturation lowers in a statistically significant way the threshold values of acoustic stimulus. Also, the configuration of the monitoring changes with age of child tested. Newborn maturation increases the frequency of occurrence of waves II, IV and VI though decreases of incidence IV/V complex. In the group of the youngest pre-term babies IV/V complex were present in 50% of the cases whereas in the group of newborns carried to term its present could be verified only in 5-11% of cases. Newborn maturity also in an essential way shortening the latent time consecutive waves as well as central conduction time determining by interpeak latency I-V. Coefficient correlation values for those parameters shows a negative statistical significance correlation. That is, a decreasing of average values of those parameters with maturation of the newborn. It was also shown that structures of the hearing pathway responsible for generation of early and late components of the brain stem responses mature at different time. Peripheral structure of the hearing pathway are significantly more mature at birth than are central structures.

Auditory Pathways↗
PubMed1994

Spectral analysis of auditory brain stem responses in perceptive hearing loss.

The Fourier analysis of auditory brain stem responses in 45 patients aged 19 to 56 treated because of perceptive hearing loss in Cracow ORL Clinic was carried out. The group consisted of: 15 patients with sudden deafness, 15 patients with Menier's disease and 15 cases with retrocochlear hearing impairment. In cases with recruiting cochlear hearing loss considerable and significantly extension of frequency range in brain stem responses was observed. Moreover, responses induced by stimulus intensity causing recruitment are identical for both ears as far as their shape and power spectrum is concerned, despite wide variety of responses caused by stimulus of different intensity. It is assumable that Fourier analysis of auditory brain stem responses gives possibility of objective evaluation of subjectively determined recruitment syndrome.

Acoustic Stimulation↗
PubMed1994

ABR audiometry in evaluation of hearing organ in neonates from high-risk pregnancy.

In a group of 130 tested newborns, pathological brain stem responses derived from acoustic stimulus was achieved in 28 (21.5%) cases. 85.2% of newborns from this group of birthed babies comparised a high-risk pregnancy group. Based on the criteria of evaluating ABR parameters of the achieved responses, three categories of hearing dysfunctions were distinguished: conductive hearing loss in 7 cases, sensori-neural in 12 cases and neurological dysfunctions in 9 cases. Control testing which was carried out after three months following the initial evaluation, allowing for the elimination of 12 children in a group of 19 for the further testing and observation. This represents 42.8% of children initially evaluated as possessing a hearing disorder and 9.2% from the total of those tested. Results obtained during successive control testing were carried-out in a 3-6 month period following the initial examination an allowed for decisions to be made. Conforming to: 4 children (3.07%) were supplied with hearing aids and rehabilitation begun, 1 child (0.76%) was referred to rehabilitation the deaf, whereas the 2 remaining children (1.53%) are currently under neurological observations.

Auditory Threshold↗
PubMed1992

[The efficiency of surgical treatment of patients with malignant tumors of nasal cavity and paranasal sinuses].

In the years 1966-80, 96 patients with malignant tumors of nasal cavity and paranasal sinuses were surgically treated in the Department of Otolaryngology, Medical University in Cracow. Out of 29 patients with macro and microscopic radical surgical treatment, 11 (37.9%) survived 5 years. The remained 62 patients, considering non-radical surgical treatment, have been additionally treated by full course of irradiation. Out of this group 34 (54.8%) survived 5 years. These data suggest that indications for additional irradiation should be extended.

Carcinoma↗
PubMed1991

[Evoked response audiometry in newborn infants examined earlier by fetal audiometry].

The aim of this study was to investigate the influence of acoustic stimulus on behavioural heart responses of fetuses near term (38 to 42 weeks of gestational age) and comparison assessment of FHR to Auditory Brain Stem Responses (ABR) in the same babies after their birth. The study group consisted of 30 babies with pathological pregnancies and control group of 30 neonates of physiological pregnancies. Our results indicated, that the pattern of FHR accelerations after application of acoustic stimulus was significantly altered and depended on of the kind of pregnancy. Duration and amplitude of FHR obtained in the patients with complicated pregnancy were significantly smaller in comparison to the pattern observed in normal patients (142 msec to 249 msec, and 36 to 22 as well). Comparing the results obtained in FA (Fetal Audiometry) and ABR (Auditory Brain Stem Responses) we can say, that prolonged latency between a stimulus and accelerations is also combined with the prolonged latency of consecutive waves in ABR. Shortened duration of accelerations and its decreased amplitude could respond to the diminished amplitude in ABR recordings.

Audiometry, Evoked Response↗
PubMed1991

[Analysis of the causes of failure in surgical treatment of cancer of the larynx].

In the years 1985-1990 within the group of 2769 patients operated upon for laryngeal cancer in four medical centres (Kraków, Poznań, Warszawa, Lublin), a clinical analysis on surgical treatment failures was performed. The most significant reasons of failures were: the highly advanced age of patients, coexistent diseases, in particular the cardiopulmonary disease; poor information of neoplastic diseases (carcinomas) and delayed referral to the doctor; lack of consent for surgical treatment; old fashioned diagnostic methods; prolonged period of making diagnosis; increasing number of patients with supra-glottic localization including the hypo-pharynx and piriform recess; a considerable degree of organ ++cancer advancement and substantial clinical advancement; not radical excision of neck glands; intra-surgical blood transfusion; micrometastases to lymphatic glands; immunity collapse; discontinuance of post-surgical radiation on affected parts; lack of lymphadenectomy backward from accessory nerve ; massive cancer metastases to lymph nodes; high histologic malignancy with characteristic carcinous invasiveness; and finally, surgical and post-surgical early and late complications ranginy within our material from 25% to 29% of surgical patients. Basing on the above mentioned analysis, the authors developed indications for surgical treatment of laryngeal cancer.

Age Factors↗
PubMed1991

[Evaluation of the effectiveness of surgical treatment of metastases of laryngeal cancer to the lymph nodes].

The evaluation of surgical treatment results was done to 308 oncological patients to whom metastases were formed in lymph nodes between 1980-1984, following the previous surgical treatment of the laryngeal cancer. The evaluation included among others the following: cancer initial localization: T and N traits; the degree of malignancy; surgical radical intervention ; assertion of neoplastic cell plugs in vessels; the time of recurrent lymphatic metastases, etc. The efficiency of surgical treatment of metastases being formed following the previous surgical treatment of laryngeal cancer, measured by the time of 5 years asymptomatic life, equalled 33.4% in the discussed material. Moreover, it was stated that in the studied group of 308 patients the percentage of deaths was increasing in the subsequent years of taking observations (from 1980 to 1984) and depended also on patients overall condition, initial cancer localization, the degree of neoplastic advancement and on the degree of cancer histologic malignancy.

Adult↗
PubMed1991

[Auditory brainstem responses in full-term infants and pre-term neonates].

Auditory Brainstem Responses (ABR) and behavioural threshold were studied in 52 infants born between 28-41 weeks of gestational age (GA), which have been between 33-42 weeks of postconceptional age (PCA) (Gestational age + postnatal age). Peak latencies of wave V and interpeak latency I-V were measured as a function of maturational changes and stimulus intensities. Behavioural audiometric threshold to pure tone were determined through behavioural observation of auditory-palpebral reflex. In the group of full-term infants threshold responses for clicks lay between 32.5 to 35.1 dB. In the group of pre-term neonates the threshold lay between 37.6 do 40 dB. Behavioural audiometry disclosed that full-term infants responded to pure tone stimuli with mean threshold of 86 dB, while the pre-term infants would respond to pure stimuli at 91 dB. The latency of wave V responses decreases progressively from a mean of 7.84 ms at 33-35 weeks of PCA, to 6.57 ms at 40-41 weeks of PCA. The ABR shows a remarkable variability in wave V latency with relatively stable interpeak latency I-V with decreases stimulus intensities.

Evoked Potentials, Auditory, Brain Stem↗
PubMed1990

[Evaluation of the causes of lymphatic metastases after surgical treatment of patients with laryngeal cancer].

During the years 1980-1988 2458 laryngeal cancer patients were operated upon in 4 ENT AM Clinics in Kraków, Poznań, Lublin and Warszawa. 300 (12%) out of them have had the cervical node metastases in 18 months after the surgery. The cause analysis was performed. The primary localizations were in the epiglottic and ++post-cricoid areas. The causes of metastases to the ++lymph nodes were analyzed; the primary epiglottic and ++post-cricoid localization of the tumor, its extensiveness and advanced clinical stage. Twice more often were the nodal metastases stated before the primary treatment, a high degree of histological malignancy, probably insufficient radicality of the surgery and insufficient immunological resistance of the organism were taken in consideration. This group of patients presented a rather high percentage of early unsuccessful results of surgical treatment of the laryngeal cancer; this problem needs further analysis and observations.

Adult↗
PubMed1990

[Surgical treatment of laryngotracheal stenosis].

In the ENT Clinic, Medical Academy, Cracow a joint ENT team accompanied by thoracic surgeon performed the segmentary resection of trachea in three patients with stenosis of the subglottal area and of the upper section of trachea. The connecting surgery of trachea and thyroid cartilage was successful in two patients, but failed in one. Advantages of this method and reason of failure were thoroughly discussed.

Aged↗
PubMed1989

Results of laryngeal cancer surgery in four ENT centers in poland.

The results of laryngeal cancer surgery were assessed in a group of 832 patients treated in four major ENT centers in Poland. Five-year survival rates were as follows: stage I, 86%; stage II, 71%; stage III, 54%; and stage IV, 42%. In experienced hands and for properly selected cases, cure rates after partial (conservation) laryngeal surgery were similar to those after total laryngectomy. For early stages (I and II), the survival after partial surgery was better than that found after radiotherapy.

Adult↗
PubMed1989

[Current trends in stapedial surgery].

The authors discussed their experiences of otospongiosis++ surgery in 949 patients as regards to technical differences, final results and complications. The review of literature was also described.

Humans↗
PubMed1989

[Eye enucleation in the treatment of malignant neoplasms of the nasal cavity and paranasal sinuses].

During the years 1966-80 96 patients with malignant tumors of the nasal cavity and paranasal sinuses were treated surgically in ENT Clinic of Medical Academy Cracow, Poland. Exenteration of the orbit was performed in 34 cases. 7 patients (20.6%) survived five years. In 15 with the orbit bone lesions but with intact periosteum the exenteration of the orbit was not performed and 80% of these patients survived five years.

Eye Enucleation↗
PubMed1989

[Melanoma of the palatal tonsil. SEM examination].

In scanning microscopy the right tonsil melanoma was examined. The authors stressed the usefulness of this examinations in precise diagnose of above mentioned tumor along with the routine histopathologic examination.

Adult↗