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Recruitment maneuver: RAMP versus CPAP pressure profile in a model of acute lung injury.

Abstract：

:We examined whether recruitment maneuvers (RMs) with gradual increase in airway pressure (RAMP) provide better outcome than continuous positive airway pressure (CPAP) in paraquat-induced acute lung injury (ALI). Wistar rats received saline intraperitoneally (0.5 mL, CTRL) or paraquat (15 mg/kg, ALI). Twenty-four hours later lung mechanics [static elastance, viscoelastic component of elastance, resistive, viscoelastic and total pressures] were determined before and after recruitment with 40cmH2O CPAP for 40s or 40-s-long slow increase in pressure up to 40cmH2O (RAMP) followed by 0 or 5 cmH2O PEEP. Fractional area of alveolar collapse and PCIII mRNA were determined. All mechanical parameters and the fraction area of alveolar collapse were higher in ALI compared to CTRL. Only RAMP-PEEP maneuver significantly improved lung mechanics and decreased PCIII mRNA expression (53%) compared with ALI, while both RMs followed by PEEP decreased alveolar collapse. In conclusion, in the present experimental ALI model, RAMP followed by 5cm H2O PEEP yields a better outcome.

journal_name

Respir Physiol Neurobiol

journal_title

Respiratory physiology & neurobiology

authors

Riva DR,Contador RS,Baez-Garcia CS,Xisto DG,Cagido VR,Martini SV,Morales MM,Rocco PR,Faffe DS,Zin WA

doi

10.1016/j.resp.2009.08.010

subject

Has Abstract

pub_date

2009-10-31 00:00:00

pages

62-8

issue

1

eissn

1569-9048

issn

1878-1519

pii

S1569-9048(09)00246-8

journal_volume

169

pub_type

杂志文章

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