https://wikianesthesia.org/w/api.php?action=feedcontributions&feedformat=atom&user=Louise+Wen%2C+MDWikiAnesthesia - User contributions [en]2026-04-25T21:50:55ZUser contributionsMediaWiki 1.37.1https://wikianesthesia.org/w/index.php?title=Static_versus_Dynamic_Compliance&diff=16595Static versus Dynamic Compliance2024-07-09T18:10:15Z<p>Louise Wen, MD: Created Article on Static vs Dynamic Compliance</p>
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<div>===Lung Compliance<ref>{{Citation|last=Desai|first=Jay P.|title=Pulmonary Compliance|date=2024|url=http://www.ncbi.nlm.nih.gov/books/NBK538324/|work=StatPearls|place=Treasure Island (FL)|publisher=StatPearls Publishing|pmid=30855908|access-date=2024-07-09|last2=Moustarah|first2=Fady}}</ref>===<br />
Compliance answers the question “How easily will an elastic structure stretch?” or “What is the elastic resistance of a system?”<br />
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The following defines compliance in an equation form:<br />
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<nowiki>***</nowiki> Pending moderator approval, image of compliance equation V/P ***<br />
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Where <br />
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ΔV = change in volume<br />
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ΔP = change in pleural pressure<br />
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<nowiki>***</nowiki> Pending moderator approval, image of pressure volume loop ***<br />
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In a high compliance state, a minimal increase in pressure translates to a large increase in volume. In a low compliance state, a large increase in pressure translates to only a minimal increase in volume.<br />
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===Static Compliance===<br />
Static compliance characterizes pulmonary compliance at the level of the alveoli when there is no active airflow, such as at the beginning or end of a breath.<br />
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The following defines static compliance in an equation form, where static compliance is the tidal volume divided by the '''''plateau''''' pressure minus the positive end expiratory pressure (PEEP).<br />
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<nowiki>***</nowiki> Pending moderator approval, image of formula for static compliance formula. ***<br />
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Examples of medical conditions that primarily affect static compliance: pneumonia, pneumothorax, acute respiratory distress syndrome (ARDS), pulmonary fibrosis, pulmonary edema, pneumonectomy, and emphysema.<br />
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===Dynamic Compliance===<br />
Dynamic compliance characterizes pulmonary compliance at the level of the alveoli during active airflow during the inspiratory and expiratory phases of a breath. <br />
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The following defines dynamic compliance in an equation form, where dynamic compliance is the tidal volume divided by the '''''peak''''' pressure minus the positive end expiratory pressure (PEEP).<br />
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<nowiki>***</nowiki> Pending moderator approval, image of formula for dynamic compliance formula. ***<br />
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Examples of medical conditions that primarily affect dynamic compliance: asthma, tachypnea, mucus plug, foreign body, and bronchitis.<br />
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=== YouTube Video Reviewing Static vs Dynamic Compliance ===<br />
{{#ev:youtube|https://www.youtube.com/watch?v=6q-OV1F3TE0&t=655s|1000|right|frame}}<br />
<references /></div>Louise Wen, MD