2nd order laboratory parameters – depending on the results of the history, physical examination and obligatory laboratory parameters – for differential diagnostic clarification.
- Inflammatory parameters – CRP (C-reactive protein).
- Uric acid
- Antibody tests for the detection of bacterial or viral infections.
- Macroscopic, microscopic and laboratory examination of knee joint punctate (serous, amber, bloody; urate crystals; bacteriology: direct germ detection) – in case of suspected infection with typical local signs of infection and possibly accompanying fever or night pain Note: The effusion diagnosis must be done before antibiotic administration!
