Common Laboratory (LAB) Values [ M - N - O ]

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< M - N - O >

Lab (Specimen)

Conventional Units

SI Units

Magnesium (serum) 1.5 - 2.4 mEq/L

Critical value:
<1.0 mEq/L and >4.7 mEq/L
 0.75 - 1.2 mmol/L

Critical value:
<0.5 mmol/L
    and >2.35 mmol/L
Mercury (blood) < 1 µg/dL < 50 nmol/L
Methemoglobin (blood) <2% of total Hb <0.02 of total Hb
Myelin basic protein (CSF) <4 ng/mL <4 µg/L
Myoglobin (serum) < 55 ng/mL <55 µg/L
Osmolality (serum) 278 - 305 mOsm/kg 278 - 305 mmol/kg
Osmolality (urine) 50 - 1200 mOsm/kg 50 - 1200 mmol/kg
Oxalate (urine) </= 40 mg/day </= 456 µmol/day

Important Notes  top of page icon

>Unless noted, all values are for adults.
>All laboratory values listed are method dependent (Methods include: immunoassay, colorimetry, electrophoresis, HPLC, etc).
>Values may vary between laboratories.