%0 Journal Article %A Talitha Comaru %A Priscila Padoim %A Jaqueline Stivanin %A Humberto Fiori %T Comparison of two techniques of chest physioherapy in experimental model of atelectasis in newborn pigs %D 2012 %J European Respiratory Journal %P P1181 %V 40 %N Suppl 56 %X Objective: To compare the effectiveness of two techniques of respiratory therapy in an experimental model of atelectasis by bronchial obstruction in newborn pigs.Methods: 24 pigs sedated, tracheostomized and mechanically ventilated. For the induction of atelectasis, artificial mucus was infused (Poly(ethylene oxide), Sigma-Aldrich™, USA) using an infusion pump through the tracheal tube. Confirmation of atelectasis was a chest X-ray and by a pressure drop of oxygen in arterial blood. The animals were divided into 3 groups: group 1 that received tracheal aspiration after 20 minutes of confirmation of atelectasis, group 2 underwent the technique of bag squeezing over tracheal aspiration and group 3 underwent vibration chest. To evaluate the effectiveness of techniques one second X-ray was done. To evaluate the changes during the procedures were performed arterial blood gases and pulmonary mechanics evaluation before and after the induction of atelectasis immediately and 30 minutes after the procedure.Results: The mean percentage change in the PO2 was statistically detect significant between the groups (control: 97,80±37,33, bag squeezing: 166,75±68,63 e vibration: 104,41±45,45, p=0,0408), with improvement in oxygenation in the group undergoing the technique of bag squeezing. The remaining variables did not differ.Conclusions: the results suggest that the technique of bag squeezing is more efficient than manual vibration chest in these animal model, but clinical improvement was not accompanied by detectable radiological improvement. %U https://erj.ersjournals.com/content/erj/40/Suppl_56/P1181.full.pdf