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Therefore, a large left-to-right shunt through a patent ductus arteriosus (PDA) results in left atrial and left ventricular enlargement. The pulmonary veins and the ascending aorta can also be dilated with a sufficiently large patent ductus arteriosus (PDA).
Care essential 3: Suction appropriately. Patients receiving positive-pressure mechanical ventilation have a trachÂ­eÂ­Â­ostomy, endotracheal, or nasotracheal tube. Most initially have an. endotracheal tube; if they stay on the ventilator for many days or weeks, a tracheotomy may be done.