What Is a Ventilator? by NHLBI
= What Is a Ventilator? by NHLBI
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https://www.nhlbi.nih.gov/health/ventilator
Official National Heart, Lung, and Blood Institute technical patient explanation, Ventilator/Ventilator Support: What Is a Ventilator? Opening paragraphs describe a machine moving air into and out of the lungs and distinguish mask and breathing-tube interfaces. No patient-specific settings are inferred.