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Fig. 3 | Critical Care

Fig. 3

From: Noninvasive ventilation with helmet versus control strategy in patients with acute respiratory failure: a systematic review and meta-analysis of controlled studies

Fig. 3

Effect of NIV with a helmet on the gas exchange and respiratory rate. The helmet NIV group represents patients receiving NIV with a helmet, the control group represent patients receiving NIV with mask or oxygen therapy with mask. Vertical solid line null effect, boxes and horizontal lines outcome in the corresponding study and 95 % CI, filled rhombic boxes overall effect size. a Effect of NIV with a helmet on oxygenation; b effect of NIV a with helmet on pH; c effect of NIV with a helmet on PaCO2; d effect of NIV with a helmet on respiratory rate. CI confidence interval, IV inverse variance method, NIV noninvasive ventilation, PaCO 2 partial pressure of carbon dioxide in arterial blood, P/F the ratio of partial pressure of oxygenation in arterial blood to fraction of inspired oxygenation, SD standard deviation,

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Critical Care

ISSN: 1364-8535