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Table 1 Patient electrolytes depicting hyponatremia, consistent with a diagnosis of syndrome of inappropriate antidiuretic hormone

From: Syndrome of inappropriate antidiuretic hormone in a patient with leptomeningeal carcinomatosis

Electrolytes

Plasma (reference intervals)

Urine (reference intervals)

Sodium (Na)

123 (135–148 mmol/L)

97 (10–250 mmol/L)

Potassium (K)

3.2 (3.3–5.0 mmol/L)

34 (1.5–100 mmol/L)

Chloride (Cl)

86 (96–110 mmol/L)

122 (20–250 mmol/L)

Urea nitrogen

10 (5–25 mg/dL)

201 (10–1500 mg/dL)

Creatinine (Cr)

0.47 (0.8–1.4 mg/dL)

56 (10–250 mg/dL)

Osmolality

269 (280–305 mOs/kg)

455 (350–1200 mOs/kg)