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    Using bispectral analysis in OSAS estimation
    (2010) Sezgin N.; Tagluk M.E.; Akin M.
    In this study the possibility of estimation of Obstractive Sleep Apnea Syndrome (OSAS) through electroensephalographic (EEG) signals using higher order spectra was investigated. Biological structures usually exhibit nonlinear and non-Gaussian distributed characteristics which consequently generate signals embracing nonlinear components as well as phase relations occurring between componets oscillating in different frequencies whose phase couples together over a limited period of time, so called Quadratic Phase Coupling (QPC). In this case the second order power spectrum may not reflect the real characteristics of the biological system. Therefore, the bispectrum analysis was achieved to characterize the nonlinearities and QPCs in OSAS and normal EEGs. Through this analysis the differences in OSAS EEG and normal EEG were comparatively uncovered. From the analysis it was understood that the bispectrum can be used for estimation of OSAS from patients' EEG signals. ©2010 IEEE.
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    A view on pediatric airway management: a cross sectional survey study
    (Edizioni Minerva Medica, 2022) Saracoglu A.; Saracoglu K.T.; Sorbello M.; Kurdi R.; Greif R.; Abitagaoglu S.; Akin M.
    BACKGROUND: This survey aimed to investigate routine practices and approaches of clinicians on pediatric airway in anesthesia and intensive care medicine. METHODS: A 20-question multiple-choice questionnaire with the possibility to provide open text answers was developed and sent. The survey was sent to the members of European Airway Management Society via a web-based platform. Responses were analyzed thematically. Only the answers from one representative of the pediatric service of each hospital was included into the analysis. RESULTS: Among the members, 143 physicians responded the survey, being anesthesiologists (83.2%), intensivists (11.9%), emergency medicine physicians (2.1%), and (2.8%) pain medicine practitioners. Astraight blade was preferred by 115 participants (80.4%) in newborns, whereas in infants 86 (60.1%) indicated a curved blade and 55 (38.5%) a straight blade. Uncuffed tracheal tube were preferred by 115 participants (80.4%) in newborns, whereas 24 (16.8%) used cuffed tubes. Approximately 2/3 of the participants (89, 62.2%) reported not to use routinely a cuff manometer in their clinical practice, whereas 54 participants (37.8%) use it routinely in pediatric patients. Direct laryngoscopy for routine pediatric tracheal intubation was reported by 127 participants (88.8%), while 16 (11.2%) reported using videolaryngoscopes routinely. Interestingly, 39 (27.3%) had never performed neither videolaryngoscopy nor flexible bronchoscopy in children. These results were significantly less in hospitals with a dedicated pediatric anesthesiologist. CONCLUSIONS: This survey on airway management in pediatric anesthesia revealed that the use of cuffed tubes and the routine monitoring of cuff pressure are rare. In addition, the rate of videolaryngoscopy or flexible optical intubation was low for expected difficult intubation. Our survey highlights the need for properly trained pediatric anesthesiologists working in-line with updated scientific evidence. © 2022 Edizioni Minerva Medica. All rights reserved.