: Bicarbonate (Standard) [Substance Concentration] in Whole Blood

: What Is Standard Bicarbonate?

: Bicarbonate is a key buffer that helps keep your blood's pH within a healthy range. "Standard" bicarbonate is a calculated figure that estimates what your bicarbonate would be under standardized breathing conditions, so it focuses on the metabolic side of acid-base balance rather than changes driven by breathing.

: Why the Test Is Done

: This measurement is typically part of a blood gas or electrolyte panel used to evaluate conditions such as metabolic acidosis or metabolic alkalosis, to monitor treatment, or to help interpret acid-base disturbances in acutely ill patients.

: How the Sample Is Collected

: The test is performed on a whole blood sample, usually obtained from an artery or sometimes a vein, and analyzed on a blood gas or chemistry instrument. The standard bicarbonate value is generally calculated from measured pH and carbon dioxide rather than directly measured.

: What the Results Mean

: Results are interpreted together with pH, carbon dioxide, and other electrolytes. A low standard bicarbonate may suggest metabolic acidosis, while a high value may suggest metabolic alkalosis; your care team considers the full picture rather than this value alone.