Practice Question
A nurse is caring for a child who has a suspected diagnosis of cystic fibrosis. Which of the following diagnostic tests will confirm the diagnosis?
Answer Choices:
Correct Answer:
Sweat chloride test
Rationale:
🧪 The sweat chloride test is the gold standard diagnostic test for cystic fibrosis (CF).
🧪 It measures the concentration of chloride in the child's sweat, which is elevated due to a defect in the CFTR gene affecting chloride transport.
🧪 A chloride level >60 mEq/L on two separate tests is diagnostic for CF.
🧪 This test is noninvasive, reliable, and typically performed at specialized centers using pilocarpine iontophoresis to stimulate sweating.
🧪 While other tests (e.g., stool fat, sputum culture, or pulmonary function) support the diagnosis or monitor progression, they do not confirm CF alone.
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This question is from RN ATI Pediatrics Unit II Exam which contains 59 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: ATI Exam(s)
- Domain: RN ATI Pediatrics
- Answer Choices: 4