This study aims to use the technique of microdialysis to analyse the intraarticular space of the knee joint after removal of a periprosthetic joint infection affected endoprosthesis and implantation of an antibiotic-containing cement spacer over the entire period of the first hospitalization (usually 14 days) to closely monitor pharmacological and immunological aspects. In detail, antibiotic concentrations in the joint cavity and systemic circulation will be assessed according to reinfection rates, infection-free survival and fucntional outcome over a 12-month folluw-up period.
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Intraarticular concentrations of local antibiotics
Timeframe: Pre-Surgery (prothesis removal), during 14 days of hospitalization as well as pre-surgery of the reimplantation (approx. six weeks after the first surgery)