USMLE Qbank for medical MCQs and clinical cases

Full Version: Normal Lab values
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BLOOD, PLASMA, SERUM NORMAL VALUE
Ammonia, blood . . . . . . . . . . . 80–110 u/dL
Amylase, serum . . . . . . . . . . . 60–180 Somogyi units/dL
Bicarbonate, serum . . . . . . . . . 21–30 mEq/L
Bilirubin, serum (total) . . . . . . 0.1–1.0 mg/dL
Calcium, serum . . . . . . . . . . . 9–11 mg/dL
Chloride, serum . . . . . . . . . . . 98–106 mEq/L
CO2 content, blood . . . . . . . . . 24–30 mEq/L
Cortisol, fasting . . . . . . . . . . . 5–20 u/dL
Creatinine, serum . . . . . . . . . <1.5 mg/dL
Dehydrogenase, lactate, serum . . . 200–450 units/mL
Electrolytes, serum Sodium . . . . . . 136–145 mEq/L
Chloride . . . . . . . . . . . . . . . . .. . . 98–106 mEq/L
Potassium . . . . . . . . . . . . . . . . . . 3.5–5.0 mEq/L
Bicarbonate . . . . . . . . . . . . . . . . . 21–30 mEq/L
Folate, serum . . . . . . . . . . . . .. . . 6–15 ng/mL
Gases, arterial blood (room air)
Po2 . . . . 75–100 mm Hg
Pco2 . . . 35–45 mm Hg
pH . . . . . 7.38–7.44
Glucose, plasma . . . . . . . . . . . . Fasting: 70–105 mg/dL;
2-h postprandial: >140mg/dL is abnormal
Osmolality, serum . . . . . . . . . . . . 280–295 mosmol/kg H2O
Phosphatase (alkaline), serum . . . 21–91 IU/L
Phosphorus (inorganic), serum . . 3.0–4.5 mg/dL
Potassium, serum . . . . . . . . . . . 3.5–5.0 mEq/L
Proteins, serum
Total . . . . . . . . . . . . 5.5–8.0 g/dL
Albumin . . . . . . . . . . 3.5–5.5 g/dL
Globulin . . . . . . . . . . 2.0–3.5 g/dL
Sodium, serum . . . . . 136–145 mEq/L

Thyroxine (T4), serum . . . . . . . . . . . . . 4–12 ug/dL
Transaminase, serum glutamic oxaloacetic (SGOT) . . . 10–40 Karmen units/mL
Transaminase, serum glutamic pyruvic (SGPT) . . . . . . 10–40 Karmen units/mL
Triiodothyronine (T3) resin uptake . . . . . . . . . . . 25%–35%
Urea nitrogen, blood (BUN) . . . . . . . . . . . . . . . . 10–20 mg/dL
Uric acid, serum . . . . . . . . . . . . . . . . . . . . . . . . 3.0–7.0 mg/dL
Vitamin B12, serum . . . . . . . . . . . . . . . . . . . . . . 200–600 pg/mL


CEREBROSPINAL FLUID
Cell count . . . . . . . . . . . . . . . . . 1–4 mononuclear cells/mm3
Glucose . . . . . . . . . . . . . . . . . . 44–100 mg/dL
Pressure (initial) . . . . . . . . . . . . 10–20 cm H2O
Total proteins . . . . . . . . . . . . . . 15–45 mg/dL


HEMATOLOGIC
Hematocrit . . . . . . . . . . . . . . . . . . . . . . Male: 42%–52% Female: 38%–47%
Hemoglobin . . . . . . . . . . . . . . . . . . . . . Male: 14–18 g/dL Female: 12–16 g/dL
Leukocytes . . . . . . . . . . . . . . . . . . . 4300–10 000/mm3
Neutrophils, band . . . . . . . . . . . . . . . . . . . . 1%–21%
Neutrophils, segmented . . . . . . . . . .. . . . . . 25%–62%
Lymphocytes . . . . . . . . . . . . . . . . . . . . . . 20%–53%
Monocytes . . . . . . . . . . . . . . . . . . . . . . . . . 2.4%–11.8%
Eosinophils . . . . . . . . . . . . . . . . . . . . . . . . 0.3%–5.0%
Basophils . . . . . . . . . . . . . . . . . . . . . . . . . 0.6%–1.8%
Mean corpuscular hemoglobin concentration . . . . . . . . 32–36 g/dL
Platelet count, blood . . . . . . . . . . . . . . . 150 000–400 000/mm3
Prothrombin time, plasma . . . . . . . .. . . . . <2 s from control
Reticulocyte count . . . . . . . . . . . . . . . . . . . . 0.5%–2.0%
Sedimentation rate, erythrocyte (Westergren) . . . Male: 0–15 mm/h Female: 0–20 mm/h


URINE
Creatinine clearance . . . . . . . . . . . 90–140 mL/min
Osmolality . . . . . . . . . . . . . . . . . . 38–1400 mosmol/kg H2O
Protein . . . . . . . . . . . . . . . . . . . . . <100 mg/24 h
Specific gravity . . . . . . . . . . . . . . . 1.002–1.028



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