Ahmet Selim Ozkan

Prof. Dr. Ahmet Selim Ozkan

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
20 February 2024 in Diagnostics
Verified
Journal Article
Open access
PDF file
UAUmran Aygun
Umran Aygun
Fatma Hilal YaginFatma Hilal Yagin
Fatma Hilal Yagin
BYBurak Yagin
Burak Yagin
SYSeyma Yasar
Seyma Yasar
Cemil ColakCemil Colak
Cemil Colak
Luca Paolo ArdigòLuca Paolo Ardigò
Luca Paolo Ardigò
This study aims to develop an interpretable prediction model based on explainable artificial intelligence to predict bacterial sepsis and discover important biomarkers. A total of 1572 adult patients, 560 of whom were sepsis positive and 1012 of whom were negative, who were admitted to the emergency department with suspicion of sepsis, were examined. We investigated the performance characteristics of sepsis biomarkers alone and in combination for confirmed sepsis diagnosis using Sepsis-3 criteria. Three different tree-based algorithms—Extreme Gradient Boosting (XGBoost), Light Gradient Boosting Machine (LightGBM), Adaptive Boosting (AdaBoost)—were used for sepsis prediction, and after examining comprehensive performance metrics, descriptions of the optimal model were obtained with the SHAP method. The XGBoost model achieved accuracy of 0.898 (0.868–0.929) and area under the ROC curve (AUC) of 0.940 (0.898–0.980) with a 95% confidence interval. The five biomarkers for predicting sepsis were age, respiratory rate, oxygen saturation, procalcitonin, and positive blood culture. SHAP results revealed that older age, higher respiratory rate, procalcitonin, neutrophil–lymphocyte count ratio, C-reactive protein, plaque, leukocyte particle concentration, as well as lower oxygen saturation, systolic blood pressure, and hemoglobin levels increased the risk of sepsis. As a result, the Explainable Artificial Intelligence (XAI)-based prediction model can guide clinicians in the early diagnosis and treatment of sepsis, providing more effective sepsis management and potentially reducing mortality rates and medical costs.

1 October 2015 in Turkish Journal of Anesthesia and Reanimation
Verified
Journal Article
Closed access
AOAhmet Selim Ozkan
Ahmet Selim Ozkan
MEMehmet Ali Erdogan
Mehmet Ali Erdogan
MSMukadder Sanlı
Mukadder Sanlı
OKOsman Kacmaz
Osman Kacmaz
MDMahmut Durmus
Mahmut Durmus
CCCemil Colak
Cemil Colak
Most dental procedures can be performed with local anaesthesia, however noncompliant paediatric patients, patients with mental retardation or psychiatric disorders, severe anxiety, severe craniofacial anomalies and orofacial trauma may need general anaesthesia. In these patients accompanying central nervous system diseases and airway problems increase the risk of complications. Anaesthesia records of 467 cases of dental surgery performed under general anaesthesia between 2011-2014 is reported with information from the recent literature. In the study, 467 cases of dental procedures performed under general anaesthesia were taken from the İnönü University of Medicine, Dentistry Disabled Treatment Centre, after approval of the İnönü University Faculty of Medicine Ethics Committee. Demographic data, ASA classification, Mallampati (MP) score, duration of surgery, type of intubation and difficulties, comorbid diseases, premedication application, endocarditis prophylaxis, recovery time, analgesia and reasons for general anaesthesia were recorded as mean±standard deviation (SD) or as a number. The mean age of the patients was 16.78±12 years and the female/male ratio was 277/190 (59.3%/40.7%). Of the 467 patients, 219 (46.9%) were classified as ASA I, 234 (50.1%) as ASA II and 14 (3%) as ASA III. Furthermore, 182 (38.9%) patients with mental retardation, 33 (7.1%) with cerebral palsy and 28 (6%) with autism were identified. The mean operative time was 114.53±35.4 min, and the average recovery time 40.4±6 was min. Of the endotracheal intubations 277 (59.3%) were oral, 82 (17.6%) were nasal, and 108 (23.1%) were nasal with the help of fibreoptics. Difficult intubation was observed in 20 (4.3%) patients. The MP score was 1 in 397 (85%) patients, 2 in 50 (10.7%) patients, 3 in 18 (3.9%) patients and 4 in 2 (0.4%) patients. General anaesthesia was applied because of cooperation difficulties in 213 (45.6%), mental retardation in 182 (38.9%), autism in 28 (5.9%), schizophrenia in 7 (1.7%) and jaw surgery in 37 (7.9%) patients. Local infiltration was used for analgesia in 141 (30.2%), morphine in 12 (2.6%), tramadol in 3 (0.6%) and paracetamol in 311 (66.6%) patients. Endocarditis prophylaxis was employed in 36 (7.7%) cases. General anaesthesia in dental procedures is becoming increasingly common. Anaesthetic management is important due to the frequency of genetic syndromes and mental retardation. In the anaesthetic management of these patients, strategies for the patient should be identified, the process should be implemented in the operating room and preparations should be made with risk analyses.

1 January 2019 in Current Therapeutic Research
Verified
Journal Article
Open access
AOAhmet Selim Ozkan
Ahmet Selim Ozkan
SASedat Akbas
Sedat Akbas
ETErol Toy
Erol Toy
MDMahmut Durmus
Mahmut Durmus
In this study, a north polar tube (Portex® North Polar tube [Ivory PVC Portex tube; Smiths Medical International, Hythe, United Kingdom]) (NPT) and spiral tube (ST) were compared for their ability to provide a nasal airway in patients during maxillofacial surgery. Patients who were aged 18 to 65 years with American Society of Anaesthesiologists score 1 to 2 and Mallampati score 1 to 2 were included in the study. The anesthesia technique was standardized in all patients. Patients were divided into 2 groups randomly: the NPT (n = 35) and ST groups (n = 35). Anesthesia was administered with 1% to 2% sevoflurane and a mixture of 50% oxygen + 50% air in both groups. The mean arterial pressure and heart rate values of preinduction; preintubation; and the first, second, third, and fifth minutes of intubation were recorded. Epistaxis, intraoral bleeding, cuff burst, use of Magill pens, duration of intubation, intubation difficulty, laryngeal compression, head position change, and glottic grade were evaluated. There were no significant differences between groups in terms of demographic data (gender, age, height, weight, body mass index, American Society of Anaesthesiologists score, and Mallampati score). Macintosh laryngoscopes were used during intubation in all patients. There was no significant difference between groups in terms of intubation difficulty, duration of intubation, use of Magill pens, and determination of the glottic grade (P > 0.05). Epistaxis was significantly lower in the NPT group than in the ST group (P = 0.012). Intraoral bleeding was significantly higher in the ST group than in the NPT group (P = 0.001). During intubation, laryngeal compression (Sellick maneuver) and head position changes were significantly lower in the NPT group than in the ST group (P = 0.003 and P < 0.001, respectively). There were no significant differences in mean arterial pressure and heart rate between the 2 groups. We conclude that the NPT was associated with less epistaxis and manipulations such as laryngeal compression and head position changes when compared with the ST during nasotracheal intubation. The velvet-soft polyvinyl chloride material of the NPT appears to be responsible for this advantage.

1 January 2021 in Pesquisa Brasileira em Odontopediatria e Clínica Integrada
Verified
Journal Article
Open access
PDF file
GDGülsüm Duruk
Gülsüm Duruk
RKRaziye Kuru
Raziye Kuru
AOAhmet Selim Ozkan
Ahmet Selim Ozkan
Objective: To analyze children's and parents' oral health-related quality of life (OHRQoL) and children's dental fears before and after the dental rehabilitation under general anesthesia (DRGA). Material and Methods: 104 parents and their 3 to 13-year-old children (5.90 ± 2.42) who received DRGA were surveyed before and after DRGA. The children were divided into two groups: Group 1 - healthy children (n=43) and Group 2 - children with medical problems (n=61). After recording their socio-demographic information, parents completed a self-administered questionnaire named Early Childhood Oral Health Impact Scale (ECOHIS), which includes two main parts - Child Impact Section (CIS) and Family Impact Section (FIS). On the other hand, the children received a dentist-administered questionnaire named Children's Fear Survey Schedule-Dental Subscale (CFSS-DS) and Frankle Behavior Scale (FBS). For statistical analyses, Wilcoxon Signed-Rank, Mann Whitney-U, Kruskal-Wallis, and Spearman's Correlation tests were used. Results: A statistically significant decrease in all CIS, FIS, ECOHIS and CFSS-DS scores was observed after DRGA (p<0.01). This decline was greater in healthy children than in children with systemic problems (p<0.01). Conclusion: Children's and parents' OHRQoL showed better results after DRGA. The decreases in dental anxiety in children were observed after DRGA.

16 November 2016 in Turkish Journal of Anesthesia and Reanimation
Verified
Journal Article
Closed access
AOAhmet Selim Ozkan
Ahmet Selim Ozkan
GKGulay Erdogan Kayhan
Gulay Erdogan Kayhan
SASedat Akbas
Sedat Akbas
OKOsman Kacmaz
Osman Kacmaz
MDMahmut Durmus
Mahmut Durmus
Epidermolysis bullosa (EB) is a rare disease characterised by vesiculobullous lesions with minimal trauma to the skin and mucous membranes. Bleeding, scar tissue, contractures, oedema and lesions that can spread throughout the body can cause a difficult airway and vascular access in patients with EB. Therefore, anaesthetic management in patients with EB is a major problem even for experienced anaesthesiologists. Herein, we report a case of difficult airway management in a patient diagnosed with severe EB who presented for emergency tracheostomy because of respiratory failure under general anaesthesia.

1 December 2015 in Journal of Cardiothoracic and Vascular Anesthesia
Verified
Journal Article
Closed access
MEMehmet Ali Erdogan
Mehmet Ali Erdogan
AOAhmet Selim Ozkan
Ahmet Selim Ozkan
UOUlku Ozgul
Ulku Ozgul
YCYusuf Colak
Yusuf Colak
MUMuharrem Ucar
Muharrem Ucar