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  • Title: Noninvasive assisted pressure-controlled ventilation: as effective as pressure support ventilation in chronic obstructive pulmonary disease?
    Author: Kirakli C, Cerci T, Ucar ZZ, Erer OF, Bodur HA, Bilaceroglu S, Ozkan SA.
    Journal: Respiration; 2008; 75(4):402-10. PubMed ID: 17627100.
    Abstract:
    BACKGROUND: Noninvasive ventilation (NIV) is being increasingly used in hypercapnic chronic obstructive pulmonary disease (COPD) patients but the most appropriate ventilation mode is still not known. OBJECTIVES: The aim of this study was to investigate if assisted pressure-controlled ventilation (APCV) can be a better alternative to pressure-support ventilation (PSV) for NIV in COPD patients with acute hypercapnic respiratory failure (AHRF). METHODS: In this prospective randomized study, we evaluated the early effects of noninvasive APCV and PSV in 34 consecutive COPD patients with AHRF. Patients were randomized into 1 of the 2 modes, and respiratory and hemodynamic values were compared before and after 1 h of NIV. RESULTS: Baseline values did not differ between the 2 groups. There were significant improvements in partial arterial carbon dioxide pressure and pH levels in the APCV group when compared with baseline (p < 0.05). Cardiac output and cardiac index decreased in both groups (p < 0.05) but more significantly in the PSV group (p < 0.0001). The decreases in stroke volume index and increases in arterial oxygen content after NIV were also considerable in both groups (p < 0.05). Central venous pressure and systemic vascular resistance index values increased notably only after PSV (p < 0.05). CONCLUSIONS: From these data, we deduce that APCV can be a better alternative to PSV for NIV in COPD patients with AHRF owing to its more beneficial physiological effects.
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