Table 5

Characteristics and outcomes of chronic obstructive pulmonary disease patients in acute respiratory failure not randomised and treated with iron lung ventilation (ILV) or invasive mechanical ventilation (IMV)

ILVIMV
Patients n42#11
M/F24/187/4
Age yrs77.0±6.973.0±9.1
Pa,O2/FI,O2210.0±96.0182±91
Pa,CO2 kPa13.1±2.212.0±1.7
pH7.21±0.047.22±0.03
HCO3 mM38.0±13.039±8
MRC dyspnoea scale4 (1–4)4 (2–4)
Glasgow Coma Score13 (3–15)15 (3–15)
SAPS II30 (16–40)29 (15–38)
Mortality rate %2627.3
  • Data are presented as mean±sd or median (range) unless otherwise stated

  • M: male

  • F: female

  • Pa,O2: arterial oxygen tension

  • FI,O2: inspiratory oxygen fraction

  • Pa,CO2: arterial carbon dioxide tension

  • MRC: Medical Research Council

  • SAPS: simplified acute physiology score

  • #: nine patients (21.4%) required endotracheal intubation, two of these patients survived and seven died