Cystic fibrosis (CF) is suspected in a toddler. Which test is essential in establishing this diagnosis?
Bronchoscopy
Serum calcium
Urine creatinine
Sweat chloride test
The Correct Answer is D
This test measures the amount of chloride in the sweat, which is abnormally high in people with cystic fibrosis (CF). CF is an inherited disorder that affects the cells that produce mucus, sweat, and digestive juices.
Choice A is wrong because bronchoscopy is a procedure that allows the doctor to examine the airways and lungs, but it is not essential for diagnosing CF.
Choice B is wrong because serum calcium is a blood test that measures the level of calcium in the blood, which is not related to CF.
Choice C is wrong because urine creatinine is a test that measures the amount of creatinine in the urine, which reflects the kidney function, but it is not relevant to CF.
Normal ranges for sweat chloride test are:
- Less than 40 millimoles per liter (mmol/L) for children and adults
- Less than 30 mmol/L for infants younger than 6 months
A sweat chloride level of more than 60 mmol/L is considered positive for CF.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is choice D. Perinatal transmission of HIV is when HIV is passed from a woman with HIV to her child during pregnancy, childbirth, or breastfeeding.
Breast milk from an infected mother can contain HIV and infect the baby.
Choice A is wrong because HIV can be transmitted at any stage of pregnancy, not only in the third trimester.
Choice B is wrong because needlestick injury is not a common mode of perinatal transmission of HIV. It is more likely to occur among health care workers who are exposed to contaminated needles or sharp objects.
Choice C is wrong because HIV can also be transmitted through the ingestion of amniotic fluid, but it is not the only way. Amniotic fluid is the fluid that surrounds and protects the baby in the womb.
Correct Answer is C
Explanation
This is because self-monitoring of blood glucose allows children to learn how their blood sugar levels change in response to different factors such as food, exercise, stress, and medication.
It also helps them to adjust their insulin doses and dietary intake accordingly. Self-monitoring of blood glucose can improve glycemic control and reduce the risk of complications.
Choice A is wrong because it is not a less expensive method of testing.
Self-monitoring of blood glucose requires a glucose meter, test strips, lancets, and a logbook, which can be costly for some families.
Choice B is wrong because it is not less accurate than laboratory testing.
Self-monitoring of blood glucose can provide accurate and reliable results if done correctly and regularly.
Laboratory testing is usually done periodically to measure the average blood sugar level over the past 2 to 3 months (hemoglobin A1c).
Choice D is wrong because it implies that the parents are not involved in the child’s diabetes management.
Parents should still provide support and guidance to their children with diabetes, especially when they are young or newly diagnosed. Parents should also monitor their child’s blood glucose levels and help them with insulin administration if needed.
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