Common Normal Laboratory Values
This note provides common normal laboratory values essential for clinical chemistry and routine patient assessment.
Summary
This note provides common normal laboratory values essential for clinical chemistry and routine patient assessment. Hemoglobin and hematocrit levels differ by sex, reflecting physiological differences; males typically have higher ranges. White blood cells and platelets counts are vital markers of immune function and hemostasis, respectively, with defined normal ranges. Fasting blood glucose indicates metabolic status and helps in diabetes diagnosis. Blood urea nitrogen and creatinine levels evaluate kidney function. Electrolytes such as sodium and potassium maintain cellular and systemic homeostasis, with narrow normal ranges critical for proper physiological function. Familiarity with these lab values is crucial for accurate interpretation during clinical practice and board examinations.
Common Misconceptions:
- Normal ranges can vary slightly across laboratories, but the given values are widely accepted standards.
- Hemoglobin levels alone do not diagnose anemia; they must be interpreted with other parameters.
- Electrolyte values outside normal ranges require clinical correlation to assess significance.
🧠 Key Concepts
- Hemoglobin normal range
- Hematocrit normal range
- White blood cell count
- Platelet count range
- Fasting blood glucose levels
- Blood urea nitrogen range
- Creatinine normal values
- Sodium normal range
- Potassium normal range
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Full Notes
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COMMON NORMAL LABORATORY VALUES
Hemoglobin (Hgb) Male: 13.5 - 17.5 g/dL Female: 12.0 - 15.5 g/dL
Hematocrit (Hct) Male: 41% - 53% Female: 36% - 46%
White Blood Cells (WBC) 4,500 - 11,000 cells/mm3
Platelets 150,000 - 450,000 /mm3
Fasting Blood Glucose 70 - 99 mg/dL
Blood Urea Nitrogen (BUN) 7 - 20 mg/dL
Creatinine 0.6 - 1.3 mg/dL
Sodium 135 - 145 mEq/L
Potassium 3.5 - 5.0 mEq/L
These values are important for board exam and clinical practice.
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