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To the Editor :We have read with interest the original article entitled “Influence of FIO2 on PaCO2 During Noninvasive Ventilation in Patients with COPD.”[1][1] In this article, the authors prospectively evaluated 17 CO2-retaining COPD subjects recovering from acute respiratory crisis on

Influence of FIO2on PaCO2in COPD Patients With Chronic CO2Retention

Influence of F_IO₂on P_aCO₂in COPD Patients With Chronic CO₂Retention