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Endotracheal suction can cause partial lung collapse and hypoxia and alter lung mechanics. We investigated the effects of adding a recruitment manoeuvre directly after endotracheal suction to restore lung volume in volume-controlled ventilation and pressure-controlled ventilation modes. Five anaesthetized pigs were investigated. The effects of endotracheal suction with or without a recruitment manoeuvre were compared in random order. In volume-controlled ventilation, compliance decreased after suction from 33±5 to 26±6 ml.cmH 2 O –1  (P&lt;0.05), and 30 minutes later it remained decreased at 25±6 ml.cmH 2 O –1 . Venous admixture increased after suction from 5±2 to 8±4% (P&lt;0.05), but had recovered at 30 minutes. In pressure-controlled ventilation, compliance decreased after suction from 34±3 to 25±7 ml.cmH 2 O –1  (P&lt;0.05), and 30 minutes later it remained decreased at 25±7 ml.cmH 2 O –1 . Venous admixture increased after suction from 5±2 to 13±7% (P&lt;0.05), and had not recovered after 30 minutes, 10±4%. When a recruitment manoeuvre was applied directly after suction, no negative side-effects were registered in volume-controlled ventilation or pressure-controlled ventilation. We conclude that the impairment of lung mechanics and gas exchange induced by endotracheal suction can be prevented by a simple post-suction recruitment manoeuvre. Further studies are needed to identify a suitable suction recruitment manoeuvre in patients with diseased lungs.

Post–suction Recruitment Manoeuvre Restores Lung Function in Healthy, Anaesthetized Pigs