Review Question - QID 8410

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Prosthetic Joint Infection QID: 8410 (SAE13HK.71)

QID 8410 (Type "8410" in App Search)

A 55-year-old woman with history of HIV infection is scheduled for revision total knee arthroplasty to address instability. The index surgery was done 3 years ago. What is the white blood cell (WBC) count threshold in the synovial fluid for an infection diagnosis?

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100000

0/268

25000

12/268

2500

81%

216/268

250

15%

39/268

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Numerous centers have published data supporting the use of synovial fluid WBC level as one of the most accurate diagnostic criterion for infection in total joint arthroplasty. The threshold ranges between 2000 and 3000 WBC/mL. The sensitivity and specificity have been demonstrated to be higher than 90%.