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Table 4 Effect of PEEP and esophageal balloon position on partitioned respiratory mechanics in sedated and paralyzed patients

From: The occlusion tests and end-expiratory esophageal pressure: measurements and comparison in controlled and assisted ventilation

Respiratory mechanicsa

Statistical analysisb

PEEP (cmH2O)

Middle balloon position

Low balloon position

 

Coef.

95 % CI

p

ElastanceRS cmH2O/L

  

PEEP 10 versus 0

−0.06

−0.75

0.62

0.857

0

18.8 ± 5.1

18.3 ± 4.9

Low versus middle position

−0.57

−1.26

0.11

0.103

10

18.8 ± 5.1

18.5 ± 5.1

Low position × PEEP 10

0.29

−0.68

1.26

0.559

ElastanceL cmH2O/L

     

0

12.5 ± 5.1

11.6 ± 4.7

PEEP 10 versus 0

0.64

−0.26

1.55

0.164

10

13.2 ± 4.1

13.3 ± 4.2

Low versus middle position

−0.99

−1.90

−0.08

0.033

   

Low position × PEEP 10

1.13

−0.15

2.42

0.083

ElastanceCW cmH2O/L

     

0

6.3 ± 3.4

6.7 ± 4.2

PEEP 10 versus 0

−0.71

−1.39

−0.02

0.044

10

5.6 ± 2.7

5.2 ± 3.0

Low versus middle position

0.42

−0.27

1.11

0.231

   

Low position × PEEP 10

−0.85

−1.81

0.12

0.088

El–End–Insp Tp cmH2O

     

0

6.3 ± 2.6

5.7 ± 2.2

PEEP 10 versus 0

8.23

7.76

8.70

<0.001

10

14.6 ± 2.7

13.5 ± 2.5

Low versus middle position

−0.61

−1.09

−0.14

0.011

   

Low position × PEEP 10

−0.50

−1.17

0.17

0.142

  1. Statistically significant p values are in italics
  2. PEEP positive end-expiratory pressure, Elastance RS elastance of respiratory system, Elastance L elastance of lung, Elastance CW elastance of chest wall, El–End–Insp Tp elastance-derived end-inspiratory transpulmonary pressure
  3. Data are presented as amean ± standard deviation. b p value from linear random-intercept regression models