The Impact of Lung Recruitment Maneuver in 24-32 Weekers, and the Incidence of Bronchopulmonary Dysplasia

hypothesis : 1. The incident of dysplasia bronchopulmonary and/or death in 24-32 weekers babies on assist-control volume guarantee ventilation are lower in lung recruitment maneuver (LRM) group compare to control. 2. The serum levels of surfactant protein-D in 24-32 weekers babies on assist-control volume guarantee ventilation are lower in lung recruitment maneuver (LRM) group compare to control. 3. The serum concentration of CD-31+ and CD-42b- in 24-32 weekers babies on assist-control volume guarantee ventilation are lower in lung recruitment maneuver (LRM) group compare to control. 4. The right and left cardiac output in 24-32 weekers babies on assist-control volume guarantee mode are more higher in lung recruitment maneuver (LRM) group, than group that did not get LRM 5. The incident Patent Ductus Arteriosus in 24-32 weekers babies on assist-control volume guarantee ventilation are lower in lung recruitment maneuver (LRM) group compare to control. 6. The difference tc-pCO2 - PaCO2 , tcO2 index , and strong ion difference (SID) in 24-32 weekers babies on assist-control volume guarantee ventilation are lower in lung recruitment maneuver (LRM) group compare to control.