radial artery cannulation is performed by an experienced person, non-invasive blood pressure measurement will be made at 3 stages of the operation (dissection, anhepatic, neohepatic) and the effects of radial artery cannulation on the perfusion index will be evaluated by recording the correlation between radial artery and invasive measurements and the perfusion indexes of both hands simultaneously with Masimo.
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To evaluate the perfusion index of the hand in which artery cannulation was performed with Masimo.There is no result range
Timeframe: Intraoperative (patients during surgery)