How is pyuria defined?

Updated: Jun 14, 2019
  • Author: Tibor Fulop, MD, PhD, FACP, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Pyuria is defined as more than 5-10 white blood cells (WBCs) per high-power field (hpf) on a specimen spun at 2000 rpm for 5 minutes. Almost all patients with pyelonephritis have significant pyuria (>20 WBCs/hpf), although the numbers may be smaller, particularly in those with subacute pyelonephritis.


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