Intensive Care Medicine

, 37:1588 | Cite as

Optimal duration of a sustained inflation recruitment maneuver in ARDS patients

  • Jean-Michel ArnalEmail author
  • Jérémie Paquet
  • Marc Wysocki
  • Didier Demory
  • Stéphane Donati
  • Isabelle Granier
  • Gaëlle Corno
  • Jacques Durand-Gasselin



To measure the dynamics of recruitment and the hemodynamic status during a sustained inflation recruitment maneuver (RM) in order to determine the optimal duration of RM in acute respiratory distress syndrome (ARDS) patients.


This prospective study was conducted in a 12-bed intensive care unit (ICU) in a general hospital. A 40 cmH2O sustained inflation RM maintained for 30 s was performed in 50 sedated ventilated patients within the first 24 h of meeting ARDS criteria. Invasive arterial pressures, heart rate, and SpO2 were measured at 10-s intervals during the RM. The volume increase during the RM was measured by integration of the flow required to maintain the pressure at 40 cmH2O, which provides an estimation of the volume recruited during the RM. Raw data were corrected for gas consumption and fitted with an exponential curve in order to determine an individual time constant for the volume increase.


The average volume increase and time constant were 210 ± 198 mL and 2.3 ± 1.3 s, respectively. Heart rate, diastolic arterial pressure, and SpO2 did not change during or after the RM. Systolic and mean arterial pressures were maintained at 10 s, decreased significantly at 20 and 30 s during the RM, and recovered to the pre-RM value 30 s after the end of the RM (ANOVA, p < 0.01).


In early-onset ARDS patients, most of the recruitment occurs during the first 10 s of a sustained inflation RM. However, hemodynamic impairment is significant after the tenth second of RM.


Mechanical ventilation Recruitment maneuver ARDS 


Conflict of interest

JMA was supported by Hamilton Medical in presenting the results of this study at international conferences. MW is an employee of Hamilton Medical and as the head of medical research was involved in the initial discussions regarding the design of the study and assisted in writing the manuscript. He was not involved in collecting and analyzing the data.


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Copyright information

© Copyright jointly held by Springer and ESICM 2011

Authors and Affiliations

  • Jean-Michel Arnal
    • 1
    Email author
  • Jérémie Paquet
    • 1
  • Marc Wysocki
    • 2
  • Didier Demory
    • 1
  • Stéphane Donati
    • 1
  • Isabelle Granier
    • 1
  • Gaëlle Corno
    • 1
  • Jacques Durand-Gasselin
    • 1
  1. 1.Service de réanimation polyvalenteHôpital Font PréToulonFrance
  2. 2.Department of Medical ResearchHamilton MedicalBonaduzSwitzerland

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