© The Board of Management and Trustees of the British Journal of Anaesthesia 2004
Editorial II: High-frequency oscillation in acute respiratory distress syndrome (ARDS)
Department of Intensive Care, 1st Floor East Wing, Guy's and St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, UK E-mail: Angela.McLuckie@gstt.sthames.nhs.uk
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Over the past 15 years, the mortality associated with acute respiratory distress syndrome (ARDS) has steadily declined. In the late 1980s and early 1990s,
33% of patients with the syndrome survived to leave hospital, compared with survival rates of 6075% reported more recently.13 Although the explanation for this reduction is likely to be multifactorial, improvements in ventilation techniques have undoubtedly made a major contribution.
Current best-practice with regard to ventilation in ARDS is often described as protective ventilation or the open-lung approach, and involves recruitment manoeuvres to re-expand atelectatic areas of lung, followed by application of relatively high levels of positive end-expiratory pressure (PEEP) to prevent airway closure and alveolar collapse at end-expiration (atelectrauma). In addition, tidal volumes are limited to 6 ml kg1 and plateau pressure to <30 cm H2O to avoid overdistension of the lung at end-inspiration (volutrauma).4 When this approach is followed, pulmonary and systemic cytokine