The Risk Factors for Perioperative Blood Transfusion in Open Liver Resection, a Retrospective Cohort Study Development of a Transfusion Scoring System to Predict the Requirement for Perioperative Blood Transfusion in Open Liver Resection

After approval of the study protocol from the institutional review board of Chiangmai University (Approval number: ANE-2564-08020), we performed a retrospective review of all patients who underwent an elective open liver resection in our specialized hepato-biliary center from January 2006 through December 2017. This retrospective inquiry comprised 808 patients.

The data was systematically retrieved from electronic medical records. Baseline characteristics including age, gender, body mass index (BMI), co-morbidity, American Society of Anesthesiologists (ASA) classification, diagnosis, hepatitis profile, Child-Pugh classification, cirrhosis, the largest tumor size, previous liver resection, and pre-operative laboratory investigations were collected.

The following intra-operative data were collected: type of liver resection, hilar resection, vascular reconstruction, volume and type of fluid administration, estimated blood loss, packed red cell and blood product transfusion, and operation time. The definitions of liver resection and the type of hepatectomy were aligned with the anatomic classification of the Brisbane 2000 Terminology