Medical Laboratory Scientist (MLS) ASCP Practice Exam

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What is the normal range for HCO3 in mM/L during blood gas analysis?

18-22 mM/L

22-26 mM/L

The normal range for HCO3, or bicarbonate, in mM/L during blood gas analysis is critical for assessing the acid-base status of a patient. Bicarbonate levels are an essential component of the body's buffering system, helping to maintain pH balance by neutralizing excess acids. A normal HCO3 range of 22-26 mM/L indicates a well-functioning metabolic component of acid-base homeostasis, and values within this range suggest that the body is effectively regulating its bicarbonate levels in response to metabolic processes.

When the HCO3 levels fall outside this range, they can indicate various pathological states. For example, levels below 22 mM/L may suggest metabolic acidosis, while levels above 26 mM/L could indicate metabolic alkalosis. Understanding this normal range allows healthcare professionals to interpret arterial blood gas results accurately and make informed clinical decisions based on the metabolic state of the patient.

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26-30 mM/L

30-34 mM/L

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