The invention relates to a method and apparatus for optimizing an extracorporeal blood treatment using an extracorporeal blood treatment apparatus, an extracorporeal blood treatment apparatus with a device for optimizing the extracorporeal blood treatment, and a computer program to be executed on a processor for carrying out a method for optimizing the extracorporeal blood treatment. The method and apparatus are characterized in that at least one machine-specific treatment parameter for carrying out the treatment using the respective dialyzer or filter is determined with a computing unit for different types of dialyzers or filters. The computing unit determines the costs resulting from the determined machine-specific treatment parameters when using the respective dialyzer or filter. The determined costs for different types of dialyzers or filters are then displayed on a display unit. The doctor can then select the dialyzer or filter to keep the costs as low as possible.
