Laboratory test

Range

Normal value

Mean

Median

Synovial fluid cell count

15,242-641,425

< 200 cells/ul

162,480

80,665

White blood cell count

11,140-25,080

4,000-11,000/ul

16,850

16,330

Sedimentation rate

9-130

<20 mm/hr

58.9

41

C-reactive protein

44.3-90

<3.0 mg/L

82.3

>90

Lactic acid

0.7-6.4

0.5-1 mmol/L

2.36

1.7