https://wikimd.org/index.php?action=history&feed=atom&title=PCO2PCO2 - Revision history2026-05-10T21:51:11ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=PCO2&diff=5808669&oldid=prevPrab: CSV import2024-05-22T17:25:28Z<p>CSV import</p>
<p><b>New page</b></p><div>[[File:Carbon-dioxide-3D-vdW.svg|thumb|Carbon-dioxide-3D-vdW.svg]] '''PCO2''' (partial pressure of carbon dioxide) is a measure of carbon dioxide (CO2) within the blood. It is an important parameter in [[respiratory physiology]] and is used to assess the effectiveness of ventilation in the lungs.<br />
<br />
==Physiology==<br />
PCO2 is a critical component in the [[acid-base homeostasis]] of the body. It is regulated by the [[respiratory system]] and is influenced by the rate and depth of [[breathing]]. The normal range for arterial PCO2 is typically between 35 and 45 mmHg.<br />
<br />
==Measurement==<br />
PCO2 is commonly measured using [[arterial blood gas]] (ABG) analysis. This test involves drawing a sample of blood from an [[artery]], usually the [[radial artery]], and analyzing it for various parameters, including PCO2, [[pH]], and [[bicarbonate]] (HCO3-).<br />
<br />
==Clinical Significance==<br />
Abnormal PCO2 levels can indicate various medical conditions:<br />
* **[[Hypercapnia]]**: Elevated PCO2 levels, which can result from hypoventilation, lung diseases such as [[chronic obstructive pulmonary disease]] (COPD), or respiratory failure.<br />
* **[[Hypocapnia]]**: Decreased PCO2 levels, which can result from hyperventilation, anxiety, or certain metabolic disorders.<br />
<br />
==Regulation==<br />
The body regulates PCO2 through the [[respiratory center]] in the [[medulla oblongata]]. Chemoreceptors in the [[medulla]] and the [[carotid bodies]] detect changes in PCO2 and pH, adjusting the rate and depth of breathing to maintain homeostasis.<br />
<br />
==Related Concepts==<br />
* [[Partial pressure]]<br />
* [[Respiratory acidosis]]<br />
* [[Respiratory alkalosis]]<br />
* [[Ventilation-perfusion ratio]]<br />
<br />
==See Also==<br />
* [[Arterial blood gas]]<br />
* [[Respiratory physiology]]<br />
* [[Acid-base homeostasis]]<br />
<br />
==References==<br />
{{Reflist}}<br />
<br />
==External Links==<br />
{{Commons category|PCO2}}<br />
<br />
[[Category:Respiratory physiology]]<br />
[[Category:Medical terms]]<br />
[[Category:Pulmonology]]<br />
<br />
{{medicine-stub}}</div>Prab