Respiratory physiotherapy effect in very low birth weight newborn infants.

INTERVENTION: respiratory physiotherapy which includes positioning in right and left lateral decubitus,manual vibration and respiratory exercises; endotracheal suction is the suction of endotracheal tube that performed in open system. The infants received the respiratory physiotherapy for a maximum period of 10 minutes. The variables studied were measurement before and after this procedures. The endotracheal suction were carried out 5 minutes after the respiratory physiotherapy and the variables were verified immediately after and 5 minutes after the suction. CONDITION: respiratory physiotherapy PRIMARY OUTCOME: heart rate was carried out using the Vital Signs Monitoring System DX 2010 LCD Dixtal Biomedica that is pulse oximetry. oxygen saturation was carried out using the Vital Signs Monitoring System DX 2010 LCD Dixtal Biomedica that is pulse oximetry. SECONDARY OUTCOME: arterial system pressure was carried out using Vital Signs Monitoring System DX 2010 LCD Dixtal Biomedica that is oscilometric method. INCLUSION CRITERIA: preterm newborns in mechanical ventilation