Background/Aim. A more recent method, the auditory steadystate response (ASSR), has become more and more important test method due to difference that was found in previous investigations between hearing thresholds determined by the ASSR and the pure-tone audiometry (PTA). The aim of this study was to evaluate the reliability of the ASSR in determining the frequency specific hearing thresholds by establishing a correlation between the thresholds determined by PTA, as well as to evaluate the reliability of ASSR in determining the hearing threshold with respect to the level of hearing loss and the configuration of the PTA findings. Methods. The prospective study included 46 subjects (92 ears) which were assigned to groups based on their level of hearing loss and audiometric configuration. All the subjects underwent determination of hearing thresholds by PTA and ASSR without insight into their previously obtained PTA results. Results. The overall sample differences between the ASSR and PTA thresholds were 4.1, 2.5, 4.4, and 4.2 dB at 0.5, 1, 2, and 4 kHz, respectively. A high level of correlation was achieved in groups with different configurations of PTA findings. The correlation coefficients between the hearing thresholds determined by ASSR and PTA were significant in subjects with all levels of hearing loss. The differences between hearing thresholds determined by ASSR and PTA were less than 10 dB in 85% of subjects (ranging from 4 dB for moderately severe hearing loss to 7.2 dB for normal hearing). Conclusion. The ASSR is an excellent complementary method for the determination of hearing thresholds at the 4 carrier frequencies, as well as determination of the level of hearing loss and the audiometric configuration

The aim of this study is to analyze the impact of various parameters on the course and treatment outcome in patients with laryngotracheal stenosis and recurrent stenosis. Two groups of patients were compared: Group I included 29 patients with primary stenosis, and Group II included 22 patients with recurrent stenosis. The most frequent etiological factor for the development of stenosis was prolonged endotracheal intubation (79.3:77.3%), with subglottic-tracheal (44.8:45.5%) and tracheal (48.3:36.4%) localization being the most affected. Subglottic-tracheal stenosis was more common in men. There were no significant differences between the groups in regard to the grade of lumen obstruction and the length of the resected segment. In male patients, the length of the resected stenotic segment was significantly longer. Subglottic-tracheal stenoses were longer than tracheal ones. Various surgical procedures were performed, with additional management of recurrent laryngeal nerve paralysis, if necessary. Laryngotracheal reconstruction (LTR) with costal cartilage grafting (CCG) was statistically significantly more often performed in Group II, while cricotracheal resection (CTR) was more common in Group I. The incidence of complications in Group I was 24.1%, and in Group II it was 31.8%. Satisfactory airway lumen with undisturbed breathing was achieved in 93.1% of patients in Group I, and in 95.3% in Group II. Since the success rate was similar in both groups of the patients, it could be concluded that treatment outcome depends less on the factors associated with the stenosis, and more on adequate choice of surgical procedure and surgical team know-how.

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nema

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