USMLE Laboratory Values
* Included in the Biochemical Profile (SMA-12)
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







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