Effect of Colloid Versus Crystalloid on Coagulation

Inclusion Criteria: * Patient more than 18 years old * Indication for elective post-renal operation including cystectomy * Patient without anticoagulative, acetylsalicylic acid or NSAID treatment for the last 5 days. Exclusion Criteria: * Intracerebral bleeding, manifest cardiac insufficient, renal insufficient demanding dialysis, hepatic or coagulation diseases * Pregnant or nursing * Allergic * Disturbance in electrolytes * Patient under committee * Patient joining another trial interfering the actual trial.