A mother brings her 2-month-old to the well-baby clinic.
She mentions that when she kisses her baby, the infant’s skin tastes salty.
What standard diagnostic test should the nurse prepare the mother for to screen for cystic fibrosis (CF)?
Fecal-fat test.
Sweat-chloride test.
Pulmonary-function test.
Potassium chloride test.
The Correct Answer is B
Choice A rationale
A fecal-fat test is used to measure the body’s ability to break down and absorb fat. It is not a standard diagnostic test for cystic fibrosis (CF)6.
Choice B rationale
A sweat-chloride test is the standard diagnostic test for CF. People with CF have higher than normal levels of sodium and chloride in their sweat, which can make their skin taste salty.
Choice C rationale
A pulmonary-function test measures how well the lungs work and can be used to monitor lung disease in people with CF. However, it is not a standard diagnostic test for CF, especially in a 2- month-old infant.
Choice D rationale
A potassium chloride test is not a standard diagnostic test for CF6.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
While it’s possible for an infant with projectile vomiting to have stool containing mucus and blood, this is not typically associated with the condition that most commonly causes projectile vomiting in infants, which is pyloric stenosis.
Choice B rationale
An olive-sized mass in the epigastric region is a classic symptom of pyloric stenosis. This condition occurs when the muscle between the stomach and the small intestine (the pylorus) thickens, preventing food from moving from the stomach to the intestine.
Choice C rationale
Frequent burping and poor feeding can be symptoms of many different conditions in infants, but they are not typically associated with pyloric stenosis.
Choice D rationale
Rebound tenderness in the left lower abdominal quadrant is a symptom of conditions like appendicitis, but it is not typically associated with pyloric stenosis.
Correct Answer is ["1.3"]
Explanation
Step 1: First, convert the child’s weight from pounds to kilograms. Since 1 pound is approximately 0.45 kilograms, an 18-pound child weighs about 8.16 kilograms (18 pounds × 0.45 kg/pound).
Step 2: Next, calculate the total daily dosage of amoxicillin. The prescribed dosage is 25 mg/kg/day. Therefore, the total daily dosage is 204 mg/day (8.16 kg × 25 mg/kg).
Step 3: Since the medication is to be administered in two divided doses every 12 hours, each dose should be half of the total daily dosage. Therefore, each dose is 102 mg (204 mg/day ÷ 2).
Step 4: Finally, calculate the volume of the suspension to be administered for each dose. The label on the bottle reads, “Amoxicillin for Oral Suspension, USP 400 mg per 5 mL.”. Therefore, each milliliter of the suspension contains 80 mg of amoxicillin (400 mg/5 mL). To administer a dose of 102 mg, the nurse should administer approximately 1.275 mL (102 mg ÷ 80 mg/mL). If rounding is required, round to the nearest tenth.
Therefore, the nurse should administer 1.3 mL for each dose.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.