Written by: Receiving your blood test report in your inbox is convenient, but opening it and seeing pages of biochemical abbreviations (like SGPT, eGFR, or MCV) can be intimidating. While you should always consult a physician for a proper diagnosis, understanding the basic structure of your lab report helps you ask the right questions.
Decode clinical biomarker intervals, SI units, and abnormal indicator flags across our comprehensive Health Knowledge Hubs Index or check parameters in our Complete Blood Count (CBC) Test.
1. The Reference Range
Next to your test result, you will see a column labeled 'Reference Range' or 'Normal Value.' This is a range of numbers representing what is considered typical for a healthy population. Reference ranges are established by testing thousands of healthy individuals and can vary slightly between different labs based on the equipment and testing methods used.
2. Flags: High, Low, and Bold
Most modern laboratory systems will automatically flag values that fall outside the normal reference range:
- H or Bold (High): The value is above the upper limit of normal.
- L or Bold (Low): The value is below the lower limit of normal.
3. Common Abbreviations Explained
- CBC: Complete Blood Count (cellular health).
- HbA1c: Glycated Hemoglobin (3-month average sugar).
- TSH: Thyroid Stimulating Hormone.
- eGFR: Estimated Glomerular Filtration Rate (kidney function indicator).
- SGPT/ALT: Liver enzyme indicating liver stress or damage.
4. Context is Everything
An isolated 'abnormal' marker does not necessarily mean you have a medical condition. Your doctor will look at the entire panel, your symptoms, medical history, diet, and lifestyle to draw a meaningful conclusion.
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