Role Staff Category Research Publications Pulse Oximeter Bias and Inequities in Retrospective Studies--Now What? Moore KL, Gudelunas K, Lipnick MS, Bickler PE, Hendrickson CM Morphological changes of intracranial pressure quantifies vasodilatory effect of verapamil to treat cerebral vasospasm. Liu X, Vitt JR, Hetts SW, Gudelunas K, Ho N, Ko N, Hu X Association of intraoperative cerebral and muscular tissue oxygen saturation with postoperative complications and length of hospital stay after major spine surgery: an observational study. Meng L, Xiao J, Gudelunas K, Yu Z, Zhong Z, Hu X