Arthrocentesis is done. The synovial fluid is cloudy. Gram stain is negative. Analysis of the synovial fluid shows a leukocyte count of 120,000/mm3 and 90% neutrophils. Which of the following is the most appropriate additional test on the synovial fluid?
A. Culture for bacteria
B. Glucose measurement
C. Polarized light microscopy
D. Protein level
Answer:A
Arthrocentesis is done. The synovial fluid is cloudy. Gram stain is negative. Analysis of the synovial fluid shows a leukocyte count of 120,000/mm3 and 90% neutrophils. Which of the following is the most appropriate additional test on the synovial fluid?
A. Culture for bacteria B. Glucose measurement C. Polarized light microscopy D. Protein level