no funding

The purpose of this study is to evaluate whether the change of stroke volume index(△SVI) induced by the rapid mini-fluid administration can predict fluid responsiveness in patients with pneumoperitoneum

Perioperative fluid management is significant important during surgery. The current trend tends to use goal-directed fluid therapy in surgery. Goal-directed fluid therapy refers to continuous monitoring of hemodynamic parameters during surgery and managing more accurate fluid administration based on the data obtained while promoting optimal tissue perfusion. Define fluid responsiveness with the hemodynamic parameters as to whether the cardiac output can be significantly increased after administration of fluid. Therefore, the advantage of predicting fluid responsiveness is that it can optimize the cardiac output and tissue perfusion while avoiding administering unnecessary fluid to patients.

The purpose of this study is to evaluate whether the change of stroke volume index(△SVI) induced by the rapid mini-fluid administration can predict fluid responsiveness in patients with pneumoperitoneum.

Inclusion Criteria:

• receive operation that required pneumoperitoneum and FloTrac monitoring
• ASA 1~3
• age between 20 to 70 year old

Exclusion Criteria:

• patient who cannot understand the process and aim of the study
• patient with arrhythmia
• poor heart function(LVEF<50%, severe valvular disease, CAD)
• CKD
• pregnant patient
• patients allergic to voluven

receive operation that required pneumoperitoneum and FloTrac monitoring