Kansiz , T. , Ayoglu , H. , Aydin , .B.G. , Okyay , R.D. , Kucukosman , G. , Oztoprak , H. and Piskin , O. 2022. The efficacy of inferior vena cava diameter, perfusion index and pleth variability index on predicting hypotension in spinal anesthesia. Annals of Medical Research. 29, 6 (Jun. 2022), 616–622.