Concentration effect
Effect affecting the pulmonary alveolar gas concentration during anesthesia
title: "Concentration effect" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["anesthesia"] description: "Effect affecting the pulmonary alveolar gas concentration during anesthesia" topic_path: "general/anesthesia" source: "https://en.wikipedia.org/wiki/Concentration_effect" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Effect affecting the pulmonary alveolar gas concentration during anesthesia ::
In the study of inhaled anesthetics, the concentration effect is the increase in the rate that the Fa (alveolar concentration)/Fi (inspired concentration) ratio rises as the alveolar concentration of that gas is increased. In simple terms, the higher the concentration of gas administered, the faster the alveolar concentration of that gas approaches the inspired concentration. In modern practice it is only relevant for nitrous oxide since other inhaled anesthetics are delivered at much lower concentrations due to their higher potency.
References
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::