Which finding on ascetic fluid analysis is highly sensitive and specific for spontaneous bacterial peritonitis (SBP)?

Updated: Jul 23, 2019
  • Author: Brian J Daley, MD, MBA, FACS, FCCP, CNSC; Chief Editor: Praveen K Roy, MD, AGAF  more...
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The single best predictor of SBP is an ascitic fluid neutrophil count of greater than 500 cells/µL, which carries a sensitivity of 86% and a specificity of 98%. By lowering the ascitic fluid neutrophil count threshold to 250 cells/μ L, the sensitivity increases to 93% with only a minimal decrease in specificity to 94%.

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