Table 1. Initial Laboratory Studies.

Parameter	Value
Blood Chemistries
Sodium (mEq/L)	139
Potassium (mEq/L)	4.3
Chloride (mEq/L)	103
Bicarbonate (mEq/L)	26
BUN (mg/dL)	25
Creatinine (mg/dL)	1.47 (1 month prior 0.9)
Glucose (mg/dL)	1213
Calcium (mg/dL)	10.5
Serum Osmolality (mOsm/kg)	356
Anion Gap (mEq/L)	10
Complete Blood Count
Hemoglobin (g/dL)	17.7 (1 month prior 16.1)
Hematocrit (%)	57  (1 month prior 48)
WBC Count (× 103/μL)	10.2
Platelets (× 103/μL)	202
Urine Dipstick
pH	5.5
Specific Gravity	1.035
Glucose	4+
Ketones	Negative
Urine Chemistries
Sodium (mEq/L)	54
Potassium (mEq/L)	33
Other
Rapid Strep Test	+

Note: Conversion factors for units: urea nitrogen in mg/dL to mmol/L, × 0.357; serum creatinine in mg/dL to μmol/L, × 88.4; glucose in mg/dL to mM, × 0.05551; calcium in mg/dL to mmol/L, × 0.2495; hemoglobin g/dL to g/L × 10. No conversion is necessary for sodium, potassium, chloride, bicarbonate, and anion gap in mEq/L and mmol/L.