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Table 2 Change in air-flow parameters caused by addition of CBRN filter to circuit

From: Impact of adding a filter for protection from toxic inhalational compounds to the ventilation circuit of mechanically ventilated patients

Protocol number Loss of PIP cmH2O (%) Loss of PEEP cmH2O (%) Loss of TV ml (%) Notes
1 3 (25) 0   a
2 1 (7) −1 (−20)   a
3 3 (15) 0   a
4 0 0 10 (3) b
5 1 (5) 0 40 (10) b
6 3 (12) 0 50 (11) b
7 1 (10) 0 10 (7) c
8 1 (7) 0 30 (10) c
9 2 (10) 1 (20) 20 (5) c
10 1 (8) 1 (25) 30 (9) c
11 1 (7) 0 20 (7) c
12 1 (7) 0 10 (5) c
13 1 (8) 0 10 (5) d
14 2 (11) 0 0 d
15 3 (12) 0 −10 (−2) d
16 3 (10) 1 (20) −10 (−2) d
  Mean = 1.7 (10) Mean = 0.1 (3) Mean = 16.2 (5)  
  1. a Volume cycled ventilation with CBRN filter on air outflow port of ventilator
  2. b Time cycled pressure limited ventilation with CBRN filter on air outflow port of ventilator
  3. c Flow cycled ventilation with CBRN filter on air outflow port of ventilator
  4. d Time cycled pressure limited ventilation with CBRN filter on endotracheal tube