![]() ![]() A vascular ring is a rare birth defect in which a large blood vessel in the heart - the aortic arch - encircles and squeezes the trachea and esophagus. It occurs as a result of turbulent flow in the upper airway caused by obstruction. MRI/MRA is rarely requested but it is helpful in diagnosing the presence of a vascular ring. Stridor is a high-pitched, continuous sound heard over the trachea. Magnetic resonance imaging or magnetic resonance angiography - An imaging test that shows soft tissues in great detail.Plain X-ray, airway fluoroscopy, barium swallow, and CT scan of the chest - Films that can help the doctor further evaluate the noisy breathing.Flexible laryngoscopy - A test in which the doctor passes a tiny tube with a camera and light at the end through the nose and into the airway to look for problems. Stridor is an abnormal, high-pitched respiratory sound produced by irregular airflow in a narrowed airway during the inspiration phase.The airway doctor may recommend one or more of these diagnostic tests: Once the child is determined to be stable, the physician will evaluate specific features of the stridor (inspiratory, expiratory, biphasic) and voice. ![]() Stridor may also be called musical breathing or extrathoracic airway obstruction. The doctor's physical examination begins with an assessment for signs of respiratory distress (nasal flaring, retractions, color change, etc.). Stridor is a high-pitched, wheezing sound caused by disrupted airflow. Important history will include questions regarding the onset, duration and progression of stridor as well as associated feeding or voice disturbances. ![]() The evaluation of stridor begins with a history and physical examination of your child. ![]()
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