The nurse discovers welts on the back of a child whose parents identify as 1st generation Vietnamese. The mother states she rubbed the edge of a coin on her child's oiled back. The nurse should recognize that this is:

Choice A reason: This is the correct answer because the girl's symptoms indicate that she may have epiglottitis, a life-threatening condition that causes swelling of the epiglottis and obstructs the airway. The nurse should be prepared for a possible intubation or tracheostomy.

Choice B reason: This is not the correct answer because making the girl lie down and rest quietly may worsen her respiratory distress and anxiety. The girl should be allowed to sit in a position of comfort and ease of breathing.

Choice C reason: This is not the correct answer because a thorough neurological assessment is not the priority in this situation. The nurse should focus on the girl's airway, breathing, and circulation.

Choice D reason: This is not the correct answer because auscultating the lungs and preparing for administering oxygen may not be sufficient to manage the girl's airway obstruction. The nurse should also have emergency equipment ready and call for assistance.

Choice A reason: This response is correct because a sweat chloride test is the gold standard for diagnosing CF. CF is a genetic disorder that affects the function of the chloride channels in the cells, leading to thick and sticky mucus in various organs. A sweat chloride test measures the amount of chloride in the sweat, which is abnormally high in people with CF.

Choice B reason: This response is not correct because serum calcium is not related to CF. Serum calcium is a measure of the amount of calcium in the blood, which is influenced by factors such as diet, vitamin D, parathyroid hormone, and kidney function.

Choice C reason: This response is not correct because bronchoscopy is not a diagnostic test for CF. Bronchoscopy is a procedure that involves inserting a flexible tube with a camera into the airways to examine the lungs and collect samples. Bronchoscopy may be used to treat complications of CF, such as mucus plugs or infections, but it is not essential for establishing the diagnosis.

Choice D reason: This response is not correct because urine creatinine is not a diagnostic test for CF. Urine creatinine is a measure of the amount of creatinine, a waste product of muscle metabolism, in the urine. Urine creatinine reflects the kidney function and muscle mass, but it is not affected by CF.