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Semin Respir Crit Care Med 2014; 35(04): 409-417
DOI: 10.1055/s-0034-1382153
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Ventilator-Associated Lung Injury during Assisted Mechanical Ventilation

Felipe Saddy
1   Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, Brazil
2   ICU Hospital Pró Cardíaco, Rio de Janeiro, Brazil
3   Ventilatory Care Unit Hospital Copa D'Or, Rio de Janeiro, Brazil
,
Yuda Sutherasan
4   Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, IRCCS San Martino – IST, Genoa, Italy
5   Division of Pulmonary and Critical Care Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
,
Patricia R. M. Rocco
1   Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, Brazil
,
Paolo Pelosi
4   Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, IRCCS San Martino – IST, Genoa, Italy
› Author Affiliations
Further Information

Publication History

Publication Date:
08 August 2014 (online)

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Abstract

Assisted mechanical ventilation (MV) may be a favorable alternative to controlled MV at the early phase of acute respiratory distress syndrome (ARDS), since it requires less sedation, no paralysis and is associated with less hemodynamic deterioration, better distal organ perfusion, and lung protection, thus reducing the risk of ventilator-associated lung injury (VALI). In the present review, we discuss VALI in relation to assisted MV strategies, such as volume assist–control ventilation, pressure assist–control ventilation, pressure support ventilation (PSV), airway pressure release ventilation (APRV), APRV with PSV, proportional assist ventilation (PAV), noisy ventilation, and neurally adjusted ventilatory assistance (NAVA). In summary, we suggest that assisted MV can be used in ARDS patients in the following situations: (1) Pao 2/Fio 2 >150 mm Hg and positive end-expiratory pressure ≥ 5 cm H2O and (2) with modalities of pressure-targeted and time-cycled breaths including more or less spontaneous or supported breaths (A-PCV [assisted pressure-controlled ventilation] or APRV). Furthermore, during assisted MV, the following parameters should be monitored: inspiratory drive, transpulmonary pressure, and tidal volume (6 mL/kg). Further studies are required to determine the impact of novel modalities of assisted ventilation such as PAV, noisy pressure support, and NAVA on VALI.

Keywords

acute respiratory distress syndrome - assisted mechanical ventilation - ventilator-associated lung injury - transpulmonary pressure
 

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