What is a Normal HCO3 Level?
A normal bicarbonate (HCO3) level in the blood is typically between 22 and 28 milliequivalents per liter (mEq/L) or 22 to 32 mmol/L in adults. However, slight variations may exist depending on the laboratory performing the test.
Bicarbonate is a crucial component of your body's acid-base balance. It acts as a buffer, helping to maintain the blood's pH within a narrow, healthy range (7.35-7.45). Levels outside the normal range can indicate several underlying medical conditions, such as:
- Metabolic acidosis: Low HCO3 levels.
- Metabolic alkalosis: High HCO3 levels.
It's important to note that the normal range for HCO3 can be influenced by factors like:
- Age: Normal ranges can vary slightly based on age.
- Laboratory methods: Different labs might use slightly different methods, leading to minor variations in reported values.
HCO3 Levels and Related Tests
HCO3 levels are often measured as part of a comprehensive metabolic panel or arterial blood gas (ABG) test. These tests provide valuable information about your overall health and help diagnose various medical conditions. Other values typically included in an ABG are:
- pH: 7.35-7.45
- PaCO2: 38 to 42 mm Hg (5.1 to 5.6 kPa)
- PaO2: 75 to 100 millimeters of mercury (mm Hg)
- SaO2: 94% to 100%
Interpreting these values requires clinical expertise. A healthcare professional will consider all values, alongside your medical history and symptoms, to make a diagnosis.
References: The information above is supported by the provided references, which show varying ranges for normal HCO3 levels (22-28 mEq/L, 22-32 mmol/L). These minor differences highlight the importance of considering the specific lab's reference range for accurate interpretation.
