🧪 Urinalysis Interpretation
A framework for the urine dipstick, sediment cells, casts, proteinuria and crystals. Browser-side reference that pairs with the UPCR, FENa and urine-AG tools.
Urinalysis Interpretation
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When to use
Read urinalysis by component to localise a renal vs urological process; microscopy on a fresh sample is the gold standard.
How it works
RBC casts/dysmorphic RBCs + proteinuria = glomerular; muddy-brown granular casts = ATN; nephrotic-range proteinuria > 3.5 g/24h.
Key points
- Dipstick blood with no RBCs suggests myoglobin/haemoglobin.
- The dipstick is insensitive to light chains (Bence Jones).
- WBC casts suggest pyelonephritis or acute interstitial nephritis.
- Quantify protein with UPCR; separate prerenal with FENa; assess RTA with the urine anion gap.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.