Blood tests measure a variety of parameters beyond just the number of red blood cells (RBCs). Here are some examples of what blood tests can measure:

1. Complete Blood Count (CBC)

• Red Blood Cells (RBCs): Measures the number and quality of red blood cells.
• White Blood Cells (WBCs): Measures the number and types of white blood cells, important for immune response.
• Hemoglobin (Hgb): Measures the amount of hemoglobin in the blood, which carries oxygen.
• Hematocrit (Hct): Measures the proportion of blood volume occupied by red blood cells.
• Platelets: Measures the number of platelets, which are essential for blood clotting.

2. Blood Chemistry Tests

• Electrolytes: Measures levels of sodium, potassium, chloride, and bicarbonate.
• Glucose: Measures blood sugar levels, important for diagnosing and managing diabetes.
• Kidney Function Tests: Measures levels of blood urea nitrogen (BUN) and creatinine to assess kidney health.
• Liver Function Tests: Measures levels of enzymes and proteins to assess liver health.

3. Lipid Profile

• Cholesterol: Measures total cholesterol, LDL (bad) cholesterol, HDL (good) cholesterol, and triglycerides.

4. Thyroid Function Tests

• TSH (Thyroid Stimulating Hormone): Measures how well the thyroid is functioning.
• T3 and T4: Measures the levels of thyroid hormones.

5. Hormone Tests

• Hormone Levels: Measures levels of various hormones such as estrogen, testosterone, cortisol, and others.

6. Markers of Inflammation and Infection

• C-Reactive Protein (CRP): Measures the level of CRP, which increases in response to inflammation.
• Erythrocyte Sedimentation Rate (ESR): Measures the rate at which red blood cells settle at the bottom of a test tube, which can indicate inflammation.

7. Nutritional Status

• Vitamin Levels: Measures levels of vitamins such as B12, D, and others.
• Minerals: Measures levels of minerals like iron, calcium, magnesium, etc.

8. Genetic Tests

• Genetic Markers: Can identify specific genetic mutations and variations.