permissive hypercapnia

permissive hypercapnia,

ventilation that allows PaCO₂ to rise slowly over time as the pH becomes normalized. The goal is to reduce tidal volume and rate while preventing volutrauma during mechanical ventilation. Patients may need to be sedated during this.

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permissive hypercapnia

Critical care An approach to management of acute respiratory failure in which the tidal volume–V_T is lower–5-8 mL/kg than that conventionally used–10-15 mL/kg, the arterial Pco₂ is allowed to rise above the 'normal' of 40 mm Hg, and no attempts are made to compensate for subsequent changes in blood pH–respiratory acidosis, the deleterious effects of which may have been overestimated