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Some properties for spirallike functions involving generalized q-integral operator
Şahsene Altınkaya,Asena Çetinkaya 호남수학회 2023 호남수학학술지 Vol.45 No.4
In this note, we establish a new subfamily of spirallike functions by making use of a generalized q-integral operator. We examine characterization rule for functions which are member of this subclass. We further obtain coefficient estimate, subordination results and integral mean inequalities for functions in this class. The Fekete-Szeg¨o inequalities are also derived.
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Erkan Caglar,Deniz Atasoy,Mukaddes Tozlu,Engin Altınkaya,Serkan Dogan,Hakan Senturk 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.1
Background/Aims: Altered anatomy is a challenge in endoscopic retrograde cholangiopancreatography (ERCP) for patients withBillroth II anastomosis. In this study, we investigated the overall success and role of endoscopist experience. Methods: Data of patients who underwent ERCP between 2014 and 2018 after a previous Billroth II operation were retrievedretrospectively from 2 tertiary ERCP centers. The procedures were performed by 2 endoscopists with different levels of experience. Clinical success was defined as extraction of the stone, placement of a stent through a malignant stricture, and clinical and laboratoryimprovements in patients. Results: Seventy-five patients were included. The technical success rate was 83% for the experienced endoscopist and 75% for theinexperienced endoscopist (p=0.46). The mean (±standard deviation) procedure time was 23.8±5.7 min for the experienced endoscopistand 40.68±6.07 min for the inexperienced endoscopist (p<0.001). In total, 3 perforations (4%) were found. The rate of afferent loopperforation was 6.25% (1/16) for the inexperienced endoscopist and 0% (0/59) for the experienced endoscopist (p=0.053). Conclusions: ERCP in patients who had undergone Billroth II gastrectomy was time consuming for the inexperienced endoscopistwho should beware of the unique adverse events related to ERCP in patients with altered anatomy.
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Ebru Akay,Deniz Atasoy,Engin Altınkaya,Ali Koç,Tamer Ertan,Hatice Karaman,Erkan Caglar 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.3
Background/Aims: Endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) has been accepted as a reliable tool indiagnosing and staging intra-abdominal tumors. In this study, we aimed to investigate the performance of EUS-FNA in theevaluation of liver masses and its impact on patient management and procedure-related complications retrospectively. Methods: Data of patients who underwent EUS-FNA biopsies due to liver masses between November 2017 and July 2018 wereretrieved retrospectively. Biopsies were performed using 22-G needles. The demographics, EUS-FNA results, sensitivity andspecificity of the procedure, negative predictive value, positive predictive value, and specimen sufficiency rates were assessed. Results: A total of 25 patients (10 females) were included in the study. The mean age was 62.73±15.2 years. The mean size of themasses was 34.50±16.04 mm. The technical success rate was 88%. During the EUS-FNA procedure, each patient had only one passwith 94.45% of aspirate sufficiency rate and 86.3% of biopsy sufficiency rate. The diagnostic accuracy rate was 86.3%. There were nocomplications. Conclusions: For the evaluation of liver masses, EUS-FNA using a 22-G needle with even one pass had high aspiration and biopsysuccess rates accompanied with high diagnostic accuracy rates.
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