• It has been known that the recent application of a goal-directed fluid therapy (GDFT) to the intraoperative fluid infusion in patients contributes to decreasing the prevalence of postoperative complications and shortening the length of study in the intensive care unit as well as hospital stay compared with conventional methods.
• Laparoscopic surgery is in a trend that its application is being expanded recently, but there has been no report on the application of GDFT to laparoscopic surgery so far.
• To this end, this study aims to apply the intraoperative GDFT protocol in patients undergoing laparoscopic hepatobiliary or pancreatic surgery and to find out whether there is any difference in postoperative recovery and incidences of postoperative complications, by comparing with patients applied with the fluid therapy using existing conventional methods

Inclusion Criteria:

• Laparoscopic hepatobiliary or pancreatic surgery

Exclusion Criteria:

• Patients who do not consent to participation in the study
• Pregnant women, breastfeeding women

This study is to be conducted in patients scheduled with laparoscopic hepatobiliary or pancreatic surgery, who are at risk either for taking 2 hours or more in surgery or to lose blood of 1000 ml or more.