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Table 2 Effects on the delay time and inspiratory trigger pressure of tube compensation (TC) of the two ventilators

From: Does the tube-compensation function of two modern mechanical ventilators provide effective work of breathing relief?

 

Delay time (ms)

Inspiratory trigger pressure (cmH2O)

 

0% TC

100% TC

0% TC

100% TC

Airway pressure

    

   NPB840

61 ± 11

77 ± 5

4.84 ± 0.10

4.84 ± 0.10

   DE4

60 ± 6

58 ± 5

5.89 ± 0.34

5.89 ± 0.34

Tracheal pressure

    

   NPB840

91 ± 31

108 ± 17

6.52 ± 0.08

7.06 ± 0.05

   DE4

108 ± 43

95 ± 20

7.11 ± 0.06

7.14 ± 0.12

Pleural pressure

    

   NPB840

139 ± 109

121 ± 22

7.39 ± 0.06

8.19 ± 0.02

   DE4

176 ± 131

110 ± 25

8.14 ± 0.02

8.19 ± 0.14

  1. All values presented as mean ± standard deviation of three breaths (ml). DE4, Dräger Evita 4 ventilator; NPB840, Nellcor Puritan-Bennett 840 ventilator. The delay time did not differ significantly according to the inspiratory flow of simulated spontaneous breathings, and combined data are presented. An inspiratory trigger pressure measured at airway opening of 60 l/min inspiratory flow is presented.
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Critical Care

ISSN: 1364-8535