White blood cell counts and differential in synovial fluid of aseptically failed total knee arthroplasty
2000; Elsevier BV; Volume: 15; Issue: 3 Linguagem: Inglês
10.1016/s0883-5403(00)90578-3
ISSN1532-8406
AutoresR. C. Kersey, James B. Benjamin, Blake M. Marson,
Tópico(s)Osteoarthritis Treatment and Mechanisms
ResumoA cell count and differential was obtained on synovial fluid samples from 79 total knee arthroplasties undergoing revision for aseptic failure over a 5-year period. The mean white blood cell count (WBC) was 782/mL (range, 11-7,200/mL). The mean percentage of monocyte cells was 87%, and the mean polymorphonuclear leukocyte (PML) cell count was 13%. Eight patients (10.4%) had leukocyte cell counts >2,000. Five knees in 4 patients with rheumatoid arthritis had PML counts >50%. There was a single postoperative infection. In patients with osteoarthritis as a primary diagnosis, a synovial WBC of <2,000 and a differential with <50% PMLs had a 98% negative predictive value for the absence of infection. Key words: synovial fluid, cell count and differential, failed total knee arthroplasty, revision total knee arthroplasty.
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