[Preoperative hemodilution as a possibility in autologous blood transfusion. A report of experiences].

The various methods of autologous blood donation are gaining importance in clinical practice. Acute preoperative isovolaemic haemodilution represents a cost-cutting and readily practicable option. It is a method that brings positive haemodynamic effects and improves the blood's flowing properties by lowering its viscosity and raising cardiac output, as well as avoiding the dangers associated with foreign blood transfusion. Risks to the patient can largely be eliminated by keeping an eye out for contra-indications and ensuring careful perioperative monitoring. The successful use of this method depends on a clear organizational concept and close collaboration between surgeons, anaesthesists and transfusions specialists.