Comparison of HES 130 in Balanced and in Unbalanced Solution

Inclusion: * Male or female (non pregnant) patients; between 18 and 70 years * Elective non-cardiac surgery (except pancreatic or neurological surgery) with an estimated operation duration of 2 hours or longer * General anesthesia * Voluntary consent Exclusion: * Patients of ASA-class III or IV, Cardiac insufficiency NYHA classes III. IV * BMI \< 18 or \> 29 * Patients with daily urine output \< 1L * Patients on hemodialysis * Abnormal liver or renal function (i. e. above upper limit of normal range) * Abnormal coagulation function (prothrombin time (PT) 3 seconds higher than normal or activated partial thromboplastin time (APTT) 10 seconds higher than normal) * Hgb \< 10g/dl or HCT \< 30% * Potassium, sodium or chloride above the upper limit of normal of the laboratory * History of diabetes mellitus * Known history of a mental or neurological disorder, such as epileptic seizures. * History of hypertension and/or taking a beta-receptor blocker or history of atrial fibrillation * Patients with known hypersensitivity and with contraindications to HES or any of the excipients