When does NGAL rise after renal insult?

Urine NGAL rises 2-12 hours after renal injury, significantly before serum creatinine (which lags 24-48 hours). This allows earlier identification of AKI after cardiac surgery, contrast exposure, or sepsis.

What cutoff is used for NGAL in cardiac surgery AKI?

Urine NGAL >100-150 ng/mL at 2-6 hours post-cardiac surgery predicts significant AKI (KDIGO stage 2-3) with sensitivity ~80% and specificity ~75%.

What conditions cause falsely elevated NGAL?

NGAL is elevated in UTI, sepsis, CKD, and recent iron administration. Urine NGAL is more specific than plasma NGAL for kidney injury but may be elevated in urinary tract infections.

NGAL Urine AKI Timing Sensitivity

Apply urine NGAL as an early AKI biomarker. NGAL rises within 2-12 hours of injury, 12-24 hours before creatinine elevation, with sensitivity 80-82% for AKI prediction.

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Frequently Asked Questions

When does NGAL rise after renal insult?

What cutoff is used for NGAL in cardiac surgery AKI?

What conditions cause falsely elevated NGAL?