USMLE Blood Lab Values

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BLOOD, PLASMA, SERUM REFERENCE RANGE SI REFERENCE INTERVALS
Alanine aminotransferase (ALT, GPT at 30 ° C) 8-20 U/L 8-20 U/L
Amylase, serum 25-125 U/L 25-125 U/L
Aspartate aminotransferase (AST, GOT at 30 ° C) 8-20 U/L 8-20 U/L
Bilirubin, serum (adult) Total // Direct 0.1-1.0 mg/dL // 0.0-0.3 mg/dL 2-17 ?mol/L // 0-5 ?mol/L
Calcium, serum (Ca2+) 8.4-10.2 mg/dL 2.1-2.8 mmol/L
Cholesterol, serum Rec:<200 mg/dL <5.2 mmol/L
Cortisol, serum 0800 h: 5-23 ?g/dL // 1600 h: 3-15 ?g/dL 138-635 nmol/L // 82-413 nmol/L
  2000 h: < 50% of 0800 h Fraction of 0800 h: < 0.50
Creatine kinase, serum Male: 25-90 U/L 25-90 U/L
  Female: 10-70 U/L 10-70 U/L
Creatinine, serum 0.6-1.2 mg/dL 53-106 ?mol/L
Electrolytes, serum    
Sodium (Na+) 136-145 mEq/L 136-145 mmol/L
Chloride (Cl-) 95-105 mEq/L 95-105 mmol/L
Potassium (K+) 3.5-5.0 mEq/L 3.5-5.0 mmol/L
Bicarbonate (HCO3-) 22-28 mEq/L 22-28 mmol/L
Magnesium (Mg2+) 1.5-2.0 mEq/L 1.5-2.0 mmol/L
Estriol, total, serum (in pregnancy)    
24-28 wks // 32-36 wks 30-170 ng/mL // 60-280 ng/mL 104-590 // 208-970 nmol/L
28-32 wks // 36-40 wks 40-220 ng/mL // 80-350 ng/mL 140-760 // 280-1210 nmol/L
Ferritin, serum Male: 15-200 ng/mL 15-200 ?g/L
  Female: 12-150 ng/mL 12-150 ?g/L
Follicle-stimulating hormone, serum/plasma Male: 4-25 mIU/mL 4-25 U/L
  Female: premenopause 4-30 mIU/mL 4-30 U/L
  midcycle peak 10-90 mIU/mL 10-90 U/L
  postmenopause 40-250 mIU/mL 40-250 U/L
Gases, arterial blood (room air)    
pH 7.35-7.45 [H+] 36-44 nmol/L
PCO2 33-45 mm Hg 4.4-5.9 kPa
PO2 75-105 mm Hg 10.0-14.0 kPa
Glucose, serum Fasting: 70-110 mg/dL 3.8-6.1 mmol/L
  2-h postprandial: < 120 mg/dL < 6.6 mmol/L
Growth hormone - arginine stimulation Fasting: < 5 ng/mL < 5 ?g/L
  provocative stimuli: > 7 ng/mL > 7 ?g/L
Immunoglobulins, serum    
IgA 76-390 mg/dL 0.76-3.90 g/L
IgE 0-380 IU/mL 0-380 kIU/L
IgG 650-1500 mg/dL 6.5-15 g/L
IgM 40-345 mg/dL 0.4-3.45 g/L
Iron 50-170 ?g/dL 9-30 ?mol/L
Lactate dehydrogenase, serum 45-90 U/L 45-90 U/L
Luteinizing hormone, serum/plasma Male: 6-23 mIU/mL 6-23 U/L
  Female: follicular phase 5-30 mIU/mL 5-30 U/L
  midcycle 75-150 mIU/mL 75-150 U/L
  postmenopause 30-200 mIU/mL 30-200 U/L
Osmolality, serum 275-295 mOsmol/kg 275-295 mOsmol/kg
Parathyroid hormone, serum, N-terminal 230-630 pg/mL 230-630 ng/L
Phosphatase (alkaline), serum (p-NPP at 30 ° C) 20-70 U/L 20-70 U/L
Phosphorus (inorganic), serum 3.0-4.5 mg/dL 1.0-1.5 mmol/L
Prolactin, serum (hPRL) < 20 ng/mL < 20 ?g/L
Proteins, serum    
Total (recumbent) 6.0-7.8 g/dL 60-78 g/L
Albumin 3.5-5.5 g/dL 35-55 g/L
Globulin 2.3-3.5 g/dL 23-35 g/L
Thyroid-stimulating hormone, serum or plasma 0.5-5.0 ?U/mL 0.5-5.0 mU/L
Thyroidal iodine (123I) uptake 8-30% of administered dose/24 h 0.08-0.30/24 h
Thyroxine (T4), serum 5-12 ?g/dL 64-155 nmol/L
Triglycerides, serum 35-160 mg/dL 0.4-1.81 mmol/L
Triiodothyronine (T3), serum (RIA) 115-190 ng/dL 1.8-2.9 nmol/L
Triiodothyronine (T3) resin uptake 25-35% 0.25-0.35
Urea nitrogen, serum (BUN) 7-18 mg/dL 1.2-3.0 mmol urea/L
Uric acid, serum 3.0-8.2 mg/dL 0.18-0.48 mmol/L

Additional Reading:

USMLE Laboratory (lab) Values

1. USMLE Blood Lab Values
2. USMLE Cerebrospinal Lab Values
3. USMLE Hematologic Lab Values
4. USMLE Sweat and Lab Urine Values

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