Fig. 1From: Effect of intraoperative dexmedetomidine infusion on delirium in adult patients following cardiac valve surgery: a protocol of a randomized, double-blinded, and placebo-controlled studyStandard Protocol Items: Recommendations for Interventional Trials (SPIRIT) figure. The schedule of enrollment, interventions, and assessments in the study. t1, before anesthetic induction; t2, after anesthetic induction; t3, after central venous catheterization; t4, during surgery; t5, after surgeryBack to article page