Journal
JOURNAL OF ARTHROPLASTY
Volume 18, Issue 8, Pages 1038-1043Publisher
CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
DOI: 10.1016/S0883-5403(03)00448-0
Keywords
total knee; synovial fluid; white blood cell; infection; aspiration
Categories
Ask authors/readers for more resources
A white blood cell count (WBC) of >50,000 cell/mm(3) from a knee aspirate with greater than or equal to80% polymorphonuclear cells (PMNCs) is suggestive of infection. This study sought to determine if these same criteria were applicable when interpreting aspirates from a total knee. Of 440 revision total knee arthroplasties, 86 patients had preoperative aspirations of the knee before revision. Fifty-five aspirates were from aseptic failures; 31 aspirates were from patients determined to have septic failure. The mean white blood cell (WBC) count in aspirates from the aseptic group was 645 cells/mm(3) (SD = 878). The mean WBC count in the septic group was 25,951 cells/mm(3) (SD = 34,994; P=<.001). The mean percentage of PMNCs was statistically higher in the septic group compared with the aseptic group (72.8% vs 27.3%; P=<.001). The synovial fluid WBC count differential analysis is a statistically relevant indicator of the presence or absence of infection in revision knee arthroplasty. Aspirates with a WBC count of 2,500 per milliliter and 60% PMNCs are highly suggestive of infection. (C) 2003 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available