The study shall evaluate the volume effect and safety of 6 % hydroxyethyl starch 130/0.4 for restoration and maintenance of hemodynamics during the investigational period in patients undergoing major elective surgery. Up to 50 mL 6% hydroxyethyl starch/kg body weight will be administered from start of surgery until two hours after end of surgery. The study hypothesis is that 6 % hydroxyethyl starch 130/0.4 will have a reliable volume effect and can be safely administered up to the dose limit.

Inclusion Criteria:

• Patients undergoing major elective surgery
• Adults patients (≥20 years of age): expected blood loss of ≥ 1000mL Pediatric patients (<20 years of age): expected blood loss ≥ 15 mL/kg
• Adult patients: Routine measurement of Central Venous Pressure (CVP)

Exclusion Criteria:

• Known or suspected allergy to hydroxyethyl starch, including its ingredients (inclusive corn) and related drugs
• ASA classification ≥ IV
• Adult patients: renal failure with oliguria (<400 mL urin /24hours) and anuria Pediatric patients: renal failure with oliguria and anuria not related to hypovolemia
• Known bleeding disorders
• Other contra-indications according to the current SmPC of Voluven 6% solution for infusion.