Study Design and Setting
This single-center retrospective cohort study was approved by Vanderbilt University Medical Center Institutional Review Board (#191843) with waiver of informed consent and HIPAA authorization. We identified 95 CCVR patients (birth to 12 years) between September 1, 2015 and December 31, 2019. Demographic, surgical, and laboratory data from date of surgery through 30 days postoperatively were collected. Primary outcome measures were hematologic and coagulation laboratory parameters: hematocrit, platelet count, fibrinogen activity, PT, and PTT. Secondary outcome measures were intraoperative and postoperative calculated blood loss (CBL).