The nurse is caring for a one-month-old infant admitted for suspected congenital hypothyroidism. Which diagnostic test results should the nurse report to the healthcare provider?

Choice A reason: Scheduling the child for a STAT magnetic resonance imaging (MRI) of the neck is not a priority action for the nurse. MRI is a diagnostic test that uses magnetic fields and radio waves to produce images of the internal structures of the body. MRI of the neck may be useful to rule out other causes of respiratory distress, such as tumors, abscesses, or foreign bodies, but it is not an urgent procedure. Moreover, MRI requires the child to lie still for a long time, which may be difficult or impossible for a child who is anxious and in respiratory distress.

Choice B reason: Providing a nebulizer treatment with bronchodilators is not a suitable action for the nurse. Nebulizer is a device that delivers medication in the form of a mist that can be inhaled into the lungs. Bronchodilators are medications that relax the smooth muscles of the airways and improve airflow. Nebulizer treatment with bronchodilators may be helpful for children with respiratory distress caused by asthma, bronchiolitis, or chronic obstructive pulmonary disease, but not for children with respiratory distress caused by upper airway obstruction, which is the most likely scenario for this child.

Choice C reason: Obtaining bedside trays for intubation or tracheotomy by the healthcare provider is the most appropriate action for the nurse. Intubation is a procedure that involves inserting a tube through the mouth or nose into the trachea to secure the airway and provide ventilation. Tracheotomy is a surgical procedure that involves creating an opening in the neck and inserting a tube into the trachea to bypass the upper airway obstruction. Both procedures are life-saving interventions for children with respiratory distress caused by upper airway obstruction, which is the most likely scenario for this child. The nurse should prepare the necessary equipment and assist the healthcare provider in performing these procedures.

Choice D reason: Beginning prescribed intravenous antibiotic administration is not a relevant action for the nurse. Antibiotics are medications that kill or inhibit the growth of bacteria that cause infections. Antibiotics may be indicated for children with respiratory distress caused by bacterial infections, such as pneumonia, tonsillitis, or epiglottitis, but not for children with respiratory distress caused by non-infectious causes, such as foreign bodies, anaphylaxis, or congenital anomalies. Moreover, antibiotics are not an immediate intervention for respiratory distress, as they take time to exert their effects.

Choice A reason: The lumen of the aorta reduces the volume of blood flow to the lower extremities is the correct pathophysiologic mechanism that supports the findings. This is because coarctation of the aorta is a congenital condition that causes a narrowing of the aorta, usually near the ductus arteriosus. This results in increased resistance to blood flow from the heart to the lower body, leading to higher blood pressure and stronger pulses in the upper extremities and lower blood pressure and weaker pulses in the lower extremities.

Choice B reason: The aortic semilunar valve obstructs blood flow into the systemic circulation is not the correct pathophysiologic mechanism that supports the findings. This is because the aortic semilunar valve is located at the base of the aorta and prevents blood from flowing back into the left ventricle. If the valve is obstructed, it would cause aortic stenosis, which is a different condition from coarctation of the aorta. Aortic stenosis would cause symptoms such as chest pain, shortness of breath, and fainting.

Choice C reason: The pulmonic valve prevents adequate blood volume into the pulmonary circulation is not the correct pathophysiologic mechanism that supports the findings. This is because the pulmonic valve is located at the base of the pulmonary artery and prevents blood from flowing back into the right ventricle. If the valve is obstructed, it would cause pulmonic stenosis, which is a different condition from coarctation of the aorta. Pulmonic stenosis would cause symptoms such as cyanosis, fatigue, and heart murmur.

Choice D reason: An opening in the atrial septum causes a murmur due to a turbulent left to right shunt is not the correct pathophysiologic mechanism that supports the findings. This is because an opening in the atrial septum is a defect in the wall that separates the two upper chambers of the heart. It would cause a condition called atrial septal defect, which is different from coarctation of the aorta. Atrial septal defect would cause symptoms such as difficulty breathing, frequent respiratory infections, and heart palpitations.