{"id":1554,"date":"2026-03-22T15:33:24","date_gmt":"2026-03-22T15:33:24","guid":{"rendered":"https:\/\/perfusfind.com\/ic\/?p=1554"},"modified":"2026-03-22T15:33:24","modified_gmt":"2026-03-22T15:33:24","slug":"lung-protective-ventilation-strategy-in-acute-respiratory-distress-syndrome-a-critical-reappraisal-of-current-practice","status":"publish","type":"post","link":"https:\/\/perfusfind.com\/ic\/index.php\/2026\/03\/22\/lung-protective-ventilation-strategy-in-acute-respiratory-distress-syndrome-a-critical-reappraisal-of-current-practice\/","title":{"rendered":"Lung-protective ventilation strategy in acute respiratory distress syndrome: a critical reappraisal of current practice"},"content":{"rendered":"<h3 id=\"ember63\" class=\"ember-view reader-text-block__heading-3\">Why This Article Matters<\/h3>\n<p id=\"ember64\" class=\"ember-view reader-text-block__paragraph\">For more than 20 years, lung-protective ventilation has been synonymous with a single number: <strong>6 mL\/kg predicted body weight (PBW).<\/strong><\/p>\n<p id=\"ember65\" class=\"ember-view reader-text-block__paragraph\">This target has been taught, audited, benchmarked, and enforced across ICUs worldwide. Yet despite near-universal endorsement, real-world adherence remains inconsistent\u2014and outcomes have plateaued.<\/p>\n<p id=\"ember66\" class=\"ember-view reader-text-block__paragraph\">This 2025 review asks an uncomfortable but necessary question:<\/p>\n<blockquote id=\"ember67\" class=\"ember-view reader-text-block__blockquote\"><p><strong>Have we transformed a physiologic principle into a rigid rule\u2014and lost nuance along the way?<\/strong><\/p><\/blockquote>\n<p id=\"ember68\" class=\"ember-view reader-text-block__paragraph\">Rather than rejecting lung protection, Park argues that <strong>tidal volume alone is an incomplete and sometimes misleading surrogate for lung injury<\/strong>, and that modern ARDS care must move beyond fixed formulas toward physiology-driven ventilation.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember69\" class=\"ember-view reader-text-block__heading-3\">Historical Context: How 6 mL\/kg Became Dogma<\/h3>\n<p id=\"ember70\" class=\"ember-view reader-text-block__paragraph\">The foundation of low tidal volume ventilation rests on five landmark randomized trials conducted between 1998 and 2006. Of these:<\/p>\n<ul>\n<li><strong>Only two trials demonstrated a mortality benefit<\/strong>, most notably the ARDSNet trial.<\/li>\n<li>The ARDSNet comparison was <strong>6 mL\/kg vs ~12 mL\/kg<\/strong>, not against intermediate volumes.<\/li>\n<li>High-VT arms often permitted <strong>very high plateau pressures<\/strong>, magnifying harm.<\/li>\n<\/ul>\n<p id=\"ember72\" class=\"ember-view reader-text-block__paragraph\">Importantly, <strong>no randomized trial has directly compared 6 mL\/kg with 7\u20139 mL\/kg<\/strong>, leaving a large evidence gap in the range most clinicians actually use.<\/p>\n<p id=\"ember73\" class=\"ember-view reader-text-block__paragraph\">The review emphasizes a critical distinction:<\/p>\n<blockquote id=\"ember74\" class=\"ember-view reader-text-block__blockquote\"><p>The strongest signal in the literature may reflect <strong>harm from excessively high tidal volumes<\/strong>, rather than proof that 6 mL\/kg is universally optimal.<\/p><\/blockquote>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember75\" class=\"ember-view reader-text-block__heading-3\">The \u201cBaby Lung\u201d Concept\u2014and Its Consequences<\/h3>\n<p id=\"ember76\" class=\"ember-view reader-text-block__paragraph\">ARDS does not reduce lung size uniformly. Instead, it creates a <strong>small, heterogeneously aerated \u201cbaby lung.\u201d<\/strong><\/p>\n<p id=\"ember77\" class=\"ember-view reader-text-block__paragraph\">Key implications:<\/p>\n<ul>\n<li>VT is distributed across <strong>functional lung units<\/strong>, not total lung volume.<\/li>\n<li>Two patients with identical PBW may have vastly different recruitable lung volumes.<\/li>\n<li>Applying the same VT can produce <strong>very different local strain<\/strong>.<\/li>\n<\/ul>\n<p id=\"ember79\" class=\"ember-view reader-text-block__paragraph\">This explains why a \u201csafe\u201d VT in one patient may cause overdistension in another\u2014and why PBW alone cannot reflect mechanical risk.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember80\" class=\"ember-view reader-text-block__heading-3\">Why Fixed VT Targets Can Become Harmful<\/h3>\n<h3 id=\"ember81\" class=\"ember-view reader-text-block__heading-3\">1. Compliance and dead space are ignored<\/h3>\n<p id=\"ember82\" class=\"ember-view reader-text-block__paragraph\">Many ARDS patients develop:<\/p>\n<ul>\n<li>Low respiratory system compliance<\/li>\n<li>High physiologic dead space<\/li>\n<li>Severe ventilation-perfusion mismatch<\/li>\n<\/ul>\n<p id=\"ember84\" class=\"ember-view reader-text-block__paragraph\">Aggressive VT reduction in these patients often leads to:<\/p>\n<ul>\n<li>Profound hypercapnia<\/li>\n<li>Respiratory acidosis<\/li>\n<li>Escalating respiratory rates<\/li>\n<li>Increased mechanical power<\/li>\n<\/ul>\n<p id=\"ember86\" class=\"ember-view reader-text-block__paragraph\">In practice, clinicians compensate by raising RR, which may <strong>increase VILI risk despite lower VT<\/strong>.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember87\" class=\"ember-view reader-text-block__heading-3\">2. Strict VT reduction may worsen patient\u2013ventilator interaction<\/h3>\n<p id=\"ember88\" class=\"ember-view reader-text-block__paragraph\">Low VT strategies frequently require:<\/p>\n<ul>\n<li>Deep sedation<\/li>\n<li>Neuromuscular blockade<\/li>\n<li>Suppression of spontaneous effort<\/li>\n<\/ul>\n<p id=\"ember90\" class=\"ember-view reader-text-block__paragraph\">These interventions carry downstream consequences:<\/p>\n<ul>\n<li>Diaphragm atrophy<\/li>\n<li>Prolonged ventilation<\/li>\n<li>ICU-acquired weakness<\/li>\n<\/ul>\n<p id=\"ember92\" class=\"ember-view reader-text-block__paragraph\">The review highlights that <strong>ventilation strategies that worsen synchrony and drive may not be lung-protective in a holistic sense.<\/strong><\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember93\" class=\"ember-view reader-text-block__heading-3\">3. Real-world data do not confirm a sharp VT threshold<\/h3>\n<p id=\"ember94\" class=\"ember-view reader-text-block__paragraph\">Observational studies and post-hoc analyses suggest:<\/p>\n<ul>\n<li>Mortality curves flatten between ~6.5 and 9\u201310 mL\/kg PBW<\/li>\n<li>No consistent harm signal until VT exceeds ~10\u201312 mL\/kg<\/li>\n<li>Clinicians frequently individualize VT based on gas exchange and mechanics\u2014often appropriately<\/li>\n<\/ul>\n<p id=\"ember96\" class=\"ember-view reader-text-block__paragraph\">This challenges the notion of a single \u201ccorrect\u201d VT for all ARDS patients.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember97\" class=\"ember-view reader-text-block__heading-3\">What Actually Causes Ventilator-Induced Lung Injury (VILI)?<\/h3>\n<p id=\"ember98\" class=\"ember-view reader-text-block__paragraph\">The review reinforces that VILI is not caused by VT alone. It emerges from the interaction of:<\/p>\n<ul>\n<li><strong>Stress<\/strong> (transpulmonary pressure)<\/li>\n<li><strong>Strain<\/strong> (VT relative to lung size)<\/li>\n<li><strong>Driving pressure<\/strong><\/li>\n<li><strong>Mechanical power<\/strong><\/li>\n<li><strong>Heterogeneous regional ventilation<\/strong><\/li>\n<\/ul>\n<p id=\"ember100\" class=\"ember-view reader-text-block__paragraph\">Focusing narrowly on VT risks ignoring the <strong>true injurious forces<\/strong> applied to lung tissue.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember101\" class=\"ember-view reader-text-block__heading-3\">Driving Pressure: A More Informative Signal<\/h3>\n<p id=\"ember102\" class=\"ember-view reader-text-block__paragraph\">Multiple analyses show that <strong>driving pressure (\u0394P)<\/strong> correlates more closely with outcomes than VT or PEEP alone.<\/p>\n<p id=\"ember103\" class=\"ember-view reader-text-block__paragraph\">Key concept:<\/p>\n<ul>\n<li>A lower VT that <strong>raises \u0394P<\/strong> may be more injurious than a slightly higher VT that <strong>lowers \u0394P<\/strong> through recruitment.<\/li>\n<\/ul>\n<p id=\"ember105\" class=\"ember-view reader-text-block__paragraph\">Thus, VT should be interpreted <strong>in context<\/strong>, not in isolation.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember106\" class=\"ember-view reader-text-block__heading-3\">Toward a Physiology-Based Approach<\/h3>\n<p id=\"ember107\" class=\"ember-view reader-text-block__paragraph\">Park does not advocate abandoning low VT ventilation. Instead, the review calls for a <strong>balanced, patient-specific strategy<\/strong>, incorporating:<\/p>\n<ul>\n<li>Lung compliance<\/li>\n<li>Dead space fraction<\/li>\n<li>Acid\u2013base status<\/li>\n<li>Patient effort and synchrony<\/li>\n<li>Disease phase (early vs late ARDS)<\/li>\n<\/ul>\n<p id=\"ember109\" class=\"ember-view reader-text-block__paragraph\">In this framework:<\/p>\n<ul>\n<li><strong>6 mL\/kg is a starting point, not an endpoint<\/strong><\/li>\n<li>Deviations should be intentional, reasoned, and reassessed frequently<\/li>\n<\/ul>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember111\" class=\"ember-view reader-text-block__heading-3\">Implications for Practice and Guidelines<\/h3>\n<p id=\"ember112\" class=\"ember-view reader-text-block__paragraph\">This review highlights a growing tension in critical care:<\/p>\n<ul>\n<li><strong>Guidelines favor simplicity and standardization<\/strong><\/li>\n<li><strong>Physiology demands flexibility and nuance<\/strong><\/li>\n<\/ul>\n<p id=\"ember114\" class=\"ember-view reader-text-block__paragraph\">As monitoring tools improve (EIT, esophageal pressure, advanced waveform analysis), reliance on a single numeric target becomes increasingly difficult to justify.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember115\" class=\"ember-view reader-text-block__heading-3\">Bottom Line<\/h3>\n<blockquote id=\"ember116\" class=\"ember-view reader-text-block__blockquote\"><p><strong>Lung protection is not a tidal volume\u2014it is a strategy.<\/strong><\/p><\/blockquote>\n<p id=\"ember117\" class=\"ember-view reader-text-block__paragraph\">Low VT ventilation remains foundational, but <strong>rigid adherence to 6 mL\/kg without regard for lung mechanics, dead space, or patient response risks replacing precision with protocolism.<\/strong><\/p>\n<p id=\"ember118\" class=\"ember-view reader-text-block__paragraph\">The future of ARDS ventilation lies in <strong>individualized, physiology-driven care<\/strong>, not in one-size-fits-all thresholds.<\/p>\n<hr class=\"reader-divider-block__horizontal-rule\" \/>\n<h3 id=\"ember119\" class=\"ember-view reader-text-block__heading-3\">Discussion Question<\/h3>\n<p id=\"ember120\" class=\"ember-view reader-text-block__paragraph\">Have we reached a point where <strong>strict VT targets limit our ability to deliver truly lung-protective ventilation<\/strong>?<\/p>\n<p id=\"ember121\" class=\"ember-view reader-text-block__paragraph\">We look forward to hearing how you individualize VT at the bedside.<\/p>\n<p><strong><a class=\"article-editor-link article-editor-link\" style=\"font-size: 16px; background-color: #ffffff;\" href=\"https:\/\/link.springer.com\/article\/10.1186\/s13054-025-05675-2\" rel=\"noopener noreferrer\">ACCESS FULL ARTICLE HERE<\/a><\/strong><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-1556\" src=\"https:\/\/perfusfind.com\/ic\/wp-content\/uploads\/2026\/03\/1766024758288-300x300.png\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/perfusfind.com\/ic\/wp-content\/uploads\/2026\/03\/1766024758288-300x300.png 300w, https:\/\/perfusfind.com\/ic\/wp-content\/uploads\/2026\/03\/1766024758288-150x150.png 150w, https:\/\/perfusfind.com\/ic\/wp-content\/uploads\/2026\/03\/1766024758288.png 450w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p id=\"ember124\" class=\"ember-view reader-text-block__paragraph\"><strong>Open Access<\/strong> This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article\u2019s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article\u2019s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit <a class=\"QPSBGRTTCToxrpUoVsOUnfwcbljCvWXALY \" tabindex=\"0\" href=\"http:\/\/creativecommons.org\/licenses\/by\/4.0\/\" target=\"_self\" data-test-app-aware-link=\"\">http:\/\/creativecommons.org\/licenses\/by\/4.0\/<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why This Article Matters For more than 20 years, lung-protective ventilation has been synonymous with a single number: 6 mL\/kg predicted body weight (PBW). This target has been taught, audited, benchmarked, and enforced across ICUs worldwide. Yet despite near-universal endorsement, real-world adherence remains inconsistent\u2014and outcomes have plateaued. This 2025 review asks an uncomfortable but necessary [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1557,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[178,41,359,293],"class_list":["post-1554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-respiratory","tag-acute-respiratory-distress-syndrome","tag-ards","tag-lung-protective-mechanical-ventilation","tag-lung-protective-ventilation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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