A single creatinine tells you almost nothing. Feed this decoder the trend, the age, the weight and the urine output and it will calculate the eGFR and the creatinine clearance, state which acute kidney injury criteria are met, and name the nursing action. Then switch tabs to interpret the rest of the chemistry and to read the urine sediment, where the casts tell you exactly where in the nephron the injury lives.
Load a patient
Who is this patient?
Actual body weight
Creatinine trend and BUN
mg/dL · normal 0.6–1.2
mg/dL · from the flowsheet
mg/dL · normal 10–20
How old is that baseline?
Urine output
Since admission · 1 kg ≈ 1 L
Enter the chemistry
mEq/L · 3.5–5.0
mEq/L · 22–26
mg/dL · 2.5–4.5
mg/dL · 8.5–10.5
g/dL · 12–16 F, 14–18 M
g/dL · 3.5–5.0
Why these six
Each one is a job the kidney stopped doing. Potassium and bicarbonate are excretion, phosphorus and calcium are the mineral axis, hemoglobin is erythropoietin, and albumin tells you whether the filter itself is leaking.