What do they look for in a blood test?

As a medical professional, I can tell you that a blood test is a crucial diagnostic tool that can reveal a wide range of health conditions. When doctors order a blood test, they are typically looking for several key indicators: 1. Complete Blood Count (CBC): This measures the levels of different blood cells, including red blood cells (which can indicate anemia), white blood cells (which can suggest infection or inflammation), and platelets (important for clotting). 2. Blood Glucose Levels: Checked to diagnose and monitor conditions like diabetes. 3. Calcium and Electrolyte Levels: These are essential for various bodily functions, including heart and muscle function. 4. Liver Function Tests: These assess how well the liver is working by measuring levels of certain enzymes and proteins. 5. Kidney Function Tests: These evaluate how well the kidneys are filtering waste from the blood. 6. Cholesterol Levels: High levels can be a risk factor for heart disease. 7. Thyroid Function Tests: To check for conditions like hyperthyroidism or hypothyroidism. 8. Inflammatory Markers: Such as C-reactive protein, which can indicate inflammation in the body that may be associated with chronic conditions. 9. Cancer Biomarkers: Certain substances in the blood can be elevated in the presence of cancer. 10. Infectious Disease Markers: To detect the presence of specific pathogens or antibodies that suggest an infection.

This test can uncover anemia, infection, and even cancer of the blood. Another common blood test is the basic metabolic panel to check your heart, kidney, and liver function by looking at your blood glucose, calcium, and electrolyte levels.