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Table 3 Respiratory parameters collected shortly after start of helmet CPAP in success vs failures

From: Helmet CPAP to treat hypoxic pneumonia outside the ICU: an observational study during the COVID-19 outbreak

  All patients helmet CPAP N = 306 Successful helmet CPAP treatment N = 159 Helmet CPAP failure N = 147 P value
PaO2/FiO2 ratio, mmHg 202 [146–284] 252 [186–316] 166 [114–243]  < 0.001*
PaCO2, mmHg 33 [30.5–36] 33.2 [31–36.2] 32.5 [30–35.2] 0.091
Resp rate, BPM 24 [20–29] 22 [19–25] 28 [20–32] 0.007*
PEEP, cm H2O 5 [5–10] 5 [5–8] 5 [5–10] 0.010*
PaO2/FiO2 ratio increase with CPAP, mmHg 83 [28–154] 96 [45–176] 53 [18–115]  < 0.001*
ARDS diagnosis, n (%) 178 (71) 78 (62) 100 (79) 0.006*
  1. Univariate analysis of the association of respiratory parameters collected shortly after CPAP start with CPAP failure during hospital stay
  2. BPM: breaths per minute; PEEP: positive end expiratory pressure; CPAP: continuous positive airway pressure; ARDS: acute respiratory distress syndrome. Asterisks (*) indicates statistically significant differences after Bonferroni correction for multiple comparisons (p < 0.009)
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Critical Care

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