Ver el código de «Arterial blood gas»

==Background==
*Direct measurement of arterial pH, pCO2, pO2, and calculated HCO3
*Gold standard for acid-base assessment and oxygenation status

==Normal Values==
*pH: 7.35-7.45
*pCO2: 35-45 mmHg
*pO2: 80-100 mmHg
*HCO3: 22-26 mEq/L

==Interpretation==
*Step 1: Identify primary disorder (acidemia vs alkalemia)
*Step 2: Determine if primary process is respiratory (pCO2) or metabolic (HCO3)
*Step 3: Assess for appropriate compensation
*Step 4: Calculate [[anion gap]] if metabolic acidosis is present
*Step 5: If anion gap is elevated, calculate delta-delta to assess for concurrent non-gap acidosis or metabolic alkalosis
*A [[venous blood gas]] can be used as a screening tool; venous pH is ~0.03 lower and pCO2 is ~5-8 mmHg higher than arterial
*ABG is specifically needed when precise pO2 or A-a gradient is required (e.g., CO poisoning, methemoglobinemia)

==See Also==
*[[Arterial blood gas analysis]]
*[[Venous blood gas]]
*[[ABG interpretation]]
*[[Anion gap]]
*[[Metabolic acidosis]]

==References==
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[[Category:Labs]]