Blood Tests Test Reference Range (conventional units*) Acidity (pH) 7.35-7.45 Alcohol (ethanol) 0 mg/dL (more than 0.1 mg/dL usually indicates intoxication) Ammonia 15-50 µg of nitrogen/dL Amylase 53-123 units/L Ascorbic acid 0.4-1.5 mg/dL Bicarbonate (carbon dioxide content) 18-23 mEq/L Bilirubin Direct: up to 0.4 mg/dL Total: up to 1.0 mg/dL Blood volume 8.5-9.1% of body weight Calcium 8.5-10.5 mg/dL (slightly higher in children) Carbon dioxide pressure 35-45 mm Hg Carbon monoxide Less than 5% of total hemoglobin CD4 cell count 500-1500 cells/µL Ceruloplasmin 15-60 mg/dL Chloride 98-106 mEq/L Complete blood cell count (CBC) See individual tests: hemoglobin, hematocrit, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, mean corpuscular volume, platelet count, white blood cell count Copper Total: 70-150 µg/dL Creatine kinase (CK or CPK) Male: 38-174 units/L Female: 96-140 units/L Creatine kinase isoenzymes 5% MB or less Creatinine 0.6-1.2 mg/dL Electrolytes See individual tests: electrolytes routinely tested include calcium, chloride, magnesium, potassium, sodium Erythrocyte sedimentation rate (ESR) Male: 1-13 mm/hr Female: 1-20 mm/hr Glucose Fasting: 70-110 mg/dL Hematocrit Male: 45-52% Female: 37-48% Hemoglobin Male: 13-18 gm/dL Female: 12-16 gm/dL Iron 60-160 µg/dL (higher in males) Iron-binding capacity 250-460 µg/dL Lactate (lactic acid) Venous: 4.5-19.8 mg/dL Arterial: 4.5-14.4 mg/dL Lactic dehydrogenase 50-150 units/L Lead 40 µg/dL or less (much lower in children) Lipase 10-150 units/L Lipids: Cholesterol Less than 225 mg/dL (for age 40-49 yr; increases with age) Triglycerides 40-200 mg/dL (higher in males) Liver function tests Include bilirubin (total), phosphatase (alkaline), protein (total and albumin), transaminases (alanine and aspartate), prothrombin Magnesium 1.5-2.0 mEq/L Mean corpuscular hemoglobin (MCH) 27-32 pg/cell Mean corpuscular hemoglobin concentration (MCHC) 32-36% hemoglobin/cell Mean corpuscular volume (MCV) 76-100 cu µm Osmolality 280-296 mOsm/kg water Oxygen pressure 83-100 mm Hg Oxygen saturation (arterial) 96-100% Phosphatase (acid), prostatic 0-3 units/dL (Bodansky units) Phosphatase (alkaline) 50-160 units/L (higher in infants and adolescents) Phosphorus (inorganic) 3.0-4.5 mg/dL Platelet count 150,000-350,000/mL Potassium 3.5-5.0 mEq/L Prostate-specific antigen (PSA) 0-4 ng/mL (increases with age) Protein: Total 6.0-8.4 gm/dL Albumin 3.5-5.0 gm/dL Globulin 2.3-3.5 gm/dL Pyruvic acid 0.3-0.9 mg/dL Red blood cell (RBC) count 4.2-5.9 million/µL/cu mm Sequential multiple analyzer (SMA): SMA-6 (6 tests) See individual tests: bicarbonate, chloride, glucose, potassium, sodium, urea nitrogen SMA-12 (12 tests) See individual tests: bicarbonate, calcium, chloride, cholesterol, creatinine, glucose, phosphatase (alkaline), potassium, sodium, transaminases (alanine and aspartate), urea nitrogen SMA-20 (20 tests) See individual tests: protein (albumin), bicarbonate, bilirubin (direct and total), calcium, chloride, cholesterol, creatinine, gamma-glutamyltransferase, glucose, lactic dehydrogenase, magnesium, phosphatase (alkaline), potassium, protein (total), sodium, transaminases (alanine and aspartate), urea nitrogen, uric acid Sodium 135-145 mEq/L Thyroid-stimulating hormone (TSH) 0.5-5.0 µ units/mL Transaminase: Alanine (ALT) 1-21 units/L Aspartate (AST) 7-27 units/L Urea nitrogen (BUN) 7-18 mg/dL Uric acid 3.0-7.0 mg/dL Vitamin A 30-65 µg/dL White blood cell (WBC) count 4,300-10,800 cells/µL/cu mm *Conventional units can be converted to international units by using a conversion factor.