Research suggests that the forces exerted on the lungs by mechanical ventilators may cause as much damage to the lungs as the original pathologic process. In an attempt to limit additional injury to damaged lungs and improve the morbidity and mortality of patients requiring mechanical ventilation, investigators have proposed a controversial method of ventilatory management, permissive hypercapnia. This method attempts to maintain adequate oxygenation while allowing ventilation to decrease: carbon dioxide increases. The use of permissive hypercapnia is advocated in patients, with acute lung injury and status asthmeticus. Ventilating pressures and volumes are lowered, with a resultant lower minute ventilation. Few adverse effects have been noted when this process has occurred gradually. By using permissive hypercapnia from the initiation of mechanical ventilation, it is possible to support the body through the resolution of the disease process while preventing additional lung injury.
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Ventilatory Support| November 01 1996
Preventing Complications of Mechanical Ventilation: Permissive Hypercapnia
Debra Funderburg Wilmoth, RN, BSN, CCRN;
From The Porter Medical Intensive Care Unit, University of Virginia Medical Center, Charlottesville, Virginia.
Reprint requests to Debra Funderburg Wilmoth, RN, BSN, CCRN, 23 Ledyard Court, Stuarts Draft, VA 24477.
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AACN Adv Crit Care (1996) 7 (4): 473–481.
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Debra Funderburg Wilmoth, Richard M. Carpenter; Preventing Complications of Mechanical Ventilation: Permissive Hypercapnia. AACN Adv Crit Care 1 November 1996; 7 (4): 473–481. doi:
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