Perioperative Colloid vs Crystalloid in Patients Undergoing Colorectal Surgery

Balanced 6 % HES 130/0.4 vs. Balanced Crystalloid-based Infusion in Patients Undergoing Colorectal Surgery

The primary purpose of this study is to determine the effect of a balanced 6%hydroxyethyl starch 130/0.4 vs. a balanced crystalloid in colorectal surgery. The intraoperative fluid management will be given to optimize the stroke volume variation <= 12%.

The investigators hypothesize that patients in the intervention group will need less fluid administration be optimal hemodynamic stabilized.

Inclusion Criteria:

• patients undergoing elective colorectal surgery
• minimum age 18 years
• informed consent

Exclusion Criteria:

• patients with severe cardiomyopathy or severe heart failure
• history of coagulation disorders
• intracranial hemorrhage
• patients with severe cardiovascular or respiratory disorders
• renal insufficiency
• severe liver diseases