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Table 1 Breathing pattern and respiratory mechanics according to the underlying respiratory disease

From: Patient-ventilator asynchronies: may the respiratory mechanics play a role?

Variable

Restrictive diseases

(n= 39)

Obstructive diseases

(n= 30)

P

Breathing pattern

   

Respiratory rate (breath/min)

25

(9)

19

(5)

0.001

VT (ml)

450

(379 to 625)

497

(403 to 631)

0.64

Respiratory mechanics

   

CLdyn (l/cmH2O)

0.05

(0.03 to 0.12)

0.06

(0.04 to 0.09)

0.38

RL (cmH2O/lxs)

5.7

(3.8 to 8.6)

15.8

(10.1 to 19.8)

<0.001

PEEPdyn (cmH2O)

0.8

(0.5 to 1.1)

1.8

(1.2 to 3)

<0.001

PTPdi (cmH2Oxs)

7.6

(5 to 13.8)

13.4

(10.6 to 19.6)

0.003

PTPdi/min(cmH2Oxs/min)

213

(129 to 271)

283

(191 to 369)

0.026

  1. CLdyn, dynamic lung compliance; NIV, noninvasive mechanical ventilation; PEEPdyn, dynamic positive end-expiratory pressure; PTPdi, pressure-time product of diaphragmatic pressure per breath; PTPdi/min, pressure-time product of diaphragmatic pressure per minute; RL, pulmonary resistance at mid-inspiratory volume; VT, expired tidal volume. The median and interquartile ranges (IQRs) are reported for each variable except respiratory rate which did not deviate from the normal distribution, and for which the mean and standard deviation (SD) are reported. The P-values were computed by Wilcoxon's test, except for PS and respiratory rate for which the t-test was applied.
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Critical Care

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