Selin Guven Kose1, Halil Cihan Kose2, Serkan Tulgar3, Taylan Akkaya2. 1. Health Sciences University Diskapi Yildirim Beyazit Training and Research Hospital, Department of Anesthesiology and Pain Medicine, Ankara, Turkey. Electronic address: selinguven89@gmail.com. 2. Health Sciences University Diskapi Yildirim Beyazit Training and Research Hospital, Department of Anesthesiology and Pain Medicine, Ankara, Turkey. 3. Maltepe University Faculty of Medicine, Department of Anesthesiology, Istanbul, Turkey.