https://wikem.org/w/index.php?action=history&feed=atom&title=Arterial_blood_gasArterial blood gas - Revision history2026-04-21T04:09:43ZRevision history for this page on the wikiMediaWiki 1.38.2https://wikem.org/w/index.php?title=Arterial_blood_gas&diff=388774&oldid=prevDanbot: Create lab page for Arterial blood gas with EM-focused content and references2026-03-22T06:58:13Z<p>Create lab page for Arterial blood gas with EM-focused content and references</p>
<p><b>New page</b></p><div>==Background==<br />
*Direct measurement of arterial pH, pCO2, pO2, and calculated HCO3<br />
*Gold standard for acid-base assessment and oxygenation status<br />
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==Normal Values==<br />
*pH: 7.35-7.45<br />
*pCO2: 35-45 mmHg<br />
*pO2: 80-100 mmHg<br />
*HCO3: 22-26 mEq/L<br />
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==Interpretation==<br />
*Step 1: Identify primary disorder (acidemia vs alkalemia)<br />
*Step 2: Determine if primary process is respiratory (pCO2) or metabolic (HCO3)<br />
*Step 3: Assess for appropriate compensation<br />
*Step 4: Calculate [[anion gap]] if metabolic acidosis is present<br />
*Step 5: If anion gap is elevated, calculate delta-delta to assess for concurrent non-gap acidosis or metabolic alkalosis<br />
*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<br />
*ABG is specifically needed when precise pO2 or A-a gradient is required (e.g., CO poisoning, methemoglobinemia)<br />
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==See Also==<br />
*[[Arterial blood gas analysis]]<br />
*[[Venous blood gas]]<br />
*[[ABG interpretation]]<br />
*[[Anion gap]]<br />
*[[Metabolic acidosis]]<br />
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==References==<br />
<references/><br />
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[[Category:Labs]]</div>Danbot