Effects of frequency and inspiratory plateau pressure during recruitment manoeuvres on lung and distal organs in acute lung injury.
Intensive Care Med
; 35(6): 1120-8, 2009 Jun.
Article
em En
| MEDLINE
| ID: mdl-19221714
ABSTRACT
PURPOSE:
To evaluate the effects of frequency and inspiratory plateau pressure (Pplat) during recruitment manoeuvres (RMs) on lung and distal organs in acute lung injury (ALI).METHODS:
We studied paraquat-induced ALI rats. At 24 h, rats were anesthetized and RMs were applied using continuous positive airway pressure (CPAP, 40 cmH(2)O/40 s) or three-different sigh strategies (a) 180 sighs/h and Pplat = 40 cmH(2)O (S180/40), (b) 10 sighs/h and Pplat = 40 cmH(2)O (S10/40), and (c) 10 sighs/h and Pplat = 20 cmH(2)O (S10/20).RESULTS:
S180/40 yielded alveolar hyperinflation and increased lung and kidney epithelial cell apoptosis as well as type III procollagen (PCIII) mRNA expression. S10/40 resulted in a reduction in epithelial cell apoptosis and PCIII expression. Static elastance and alveolar collapse were higher in S10/20 than S10/40.CONCLUSIONS:
The reduction in sigh frequency led to a protective effect on lung and distal organs, while the combination with reduced Pplat worsened lung mechanics and histology.
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Base de dados:
MEDLINE
Assunto principal:
Recrutamento Neurofisiológico
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Estruturas Animais
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Pressão Positiva Contínua nas Vias Aéreas
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Lesão Pulmonar Aguda
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article