Blood, Plasma, and Serum Chemistries

Acetoacetate, plasma — Less than 1 mg/dL (0.1 mmol/L)

Alpha-fetoprotein, serum — 0-20 ng/mL (0-20 µg/L)

Aminotransferase, alanine (ALT, SGPT) — 0-35 U/L

Aminotransferase, aspartate (AST, SGOT) — 0-35 U/L

Ammonia, plasma — 40-80 µg/dL (23-47 µmol/L)

Amylase, serum — 0-130 U/L

Antistreptolysin O titer — Less than 150 units

Ascorbic acid (vitamin C), blood — 0.4-1.5 mg/dL (23-86 µmol/L); leukocyte — less than 20 mg/dL (< 3.5 µmol/L)

Bicarbonate, serum — 23-28 meq/L (23-28 mmol/L)

Bilirubin, serum

Total — 0.3-1.2 mg/dL (5.1-20.5 µmol/L)

Direct — 0-0.3 mg/dL (0-5.1 µmol/L)

Blood gases, arterial (room air)

PO₂ - 80-100 mm Hg

PCO₂ - 35-45 mm Hg

pH - 7.38-7.44

Calcium, serum — 9-10.5 mg/dL (2.2-2.6 mmol/L)

Carbon dioxide content, serum — 23-28 meq/L (23-28 mmol/L)

Carcinoembryonic antigen — Less than 2 ng/mL (2 µg/L)

Carotene, serum — 75-300 µg/dL (1.4-5.6 µmol/L)

Ceruloplasmin, serum — 25-43 mg/dL (250-430 mg/L)

Chloride, serum — 98-106 meq/L (98-106 mmol/L)

Cholesterol, total, plasma — 150-199 mg/dL (3.88-5.15 mmol/L), desirable

Cholesterol, low-density lipoprotein (LDL), plasma — Less than or equal to 130 mg/dL (3.36 mmol/L), desirable

Cholesterol, high-density lipoprotein (HDL), plasma — Greater than or equal to 40 mg/dL (1.04 mmol/L), desirable

Complement, serum

C3 - 55-120 mg/dL (550-1200 mg/L)

Total - 37-55 U/mL (37-55 kU/L)

Copper, serum — 70-155 µg/dL (11-24.3 µmol/L)

Creatine kinase, serum — 30-170 U/L

Creatinine, serum — 0.7-1.3 mg/dL (61.9-115 µmol/L)

Delta-aminolevulinic acid, serum — 15-23 µg/dL (1.14-1.75 µmol/L)

Ethanol, blood — 50-100 mg/dL (11-22 nmol/L), impairment

Fibrinogen, plasma — 150-350 mg/dL (1.5-3.5 g/L)

Folate, red cell — 160-855 ng/mL (362-1937 nmol/L)

Folate, serum — 2.5-20 ng/mL (5.7-45.3 nmol/L)

Glucose, plasma — Fasting, 70-105 mg/dL (3.9-5.8 mmol/L);  2 hours postprandial greater than 140 mg/dL (7.8 mmol/L), abnormal

Homocysteine, plasma — Male: 4-16 µmol/L; female: 3-14 µmol/L

Immunoglobulins

IgG - 640-1430 mg/dL (6.4-14.3 g/L)

IgG₁ - 280-1020 mg/dL (2.8-10.2 g/L)

IgG₂ - 60-790 mg/dL (0.6-7.9 g/L)

IgG₃ - 14-240 mg/dL (0.14-2.4 g/L)

IgG₄ - 11-330 mg/dL (0.11-3.3 g/L)

IgA - 70-300 mg/dL (0.7-3.0 g/L)

IgM - 20-140 mg/dL (0.2-1.4 g/L)

IgD - Less than 8 mg/dL (80 mg/L)

IgE - 0.01-0.04 mg/dL (0.1-0.4 mg/L)

Iron, serum — 60-160 µg/dL (11-29 µmol/L)

Iron binding capacity, serum — 250-460 µg/dL (45-82 µmol/L)

Lactate dehydrogenase, serum — 60-100 U/L

Lactic acid, venous blood — 6-16 mg/dL (0.67-1.8 mmol/L)

Lead, blood — Less than 40 µg/dL (1.9 µmol/L)

Lipase, serum — Less than 95 U/L

Magnesium, serum — 1.5-2.4 mg/dL (0.62-0.99 mmol/L)

Manganese, serum — 0.3-0.9 ng/mL (300-900 ng/L)

Methylmalonic acid, serum — 150-370 nmol/L

Osmolality, plasma — 275-295 mosm/kg H₂O

Phosphatase, acid, serum — 0.5-5.5 U/L

Phosphatase, alkaline, serum — 36-92 U/L

Phosphorus, inorganic, serum — 3-4.5 mg/dL (0.97-1.45 mmol/L)

Potassium, serum — 3.5-5 meq/L (3.5-5 mmol/L)

Protein, serum

Total – 6.0-7.8 g/dL (60-78 g/L)

Albumin - 3.5-5.5 g/dL (35-55 g/L)

Globulins - 2.5-3.5 g/dL (25-35 g/L)

Alpha₁ - 0.2-0.4 g/dL (2-4 g/L)

Alpha₂ - 0.5-0.9 g/dL (5-9 g/L)

Beta - 0.6-1.1 g/dL (6-11 g/L)

Gamma - 0.7-1.7 g/dL (7-17 g/L)

Rheumatoid factor — less than 40 U/mL (less than 40 kU/L)

Sodium, serum — 136-145 meq/L (136-145 mmol/L)

Triglycerides — Less than 250 mg/dL (2.82 mmol/L), desirable

Urea nitrogen, serum — 8-20 mg/dL (2.9-7.1 mmol/L)

Uric acid, serum — 2.5-8 mg/dL (0.15-0.47 mmol/L)

Vitamin B₁₂, serum — 200-800 pg/mL (148-590 pmol/L)

From MKSAP 12 ©2000, 2001, 2002. American College of Physicians—American Society of Internal Medicine