A nurse is reinforcing teaching about diagnostic tests with the parents of a child who has suspected cystic fibrosis. Which of the following diagnostic tests should the nurse include as the most definitive when diagnosing cystic fibrosis?
Pulmonary function test
Sweat chloride test
Stool fat content analysis
Sputum culture
The Correct Answer is B
A. Pulmonary function test:
Pulmonary function tests (PFTs) assess lung function by measuring airflow, lung volume, and gas exchange. While PFTs can provide valuable information about respiratory function, they are not specific to cystic fibrosis and may show abnormalities consistent with various respiratory conditions. However, PFTs are often performed in individuals with cystic fibrosis to monitor lung function over time and assess response to treatment. They are not considered the most definitive test for diagnosing cystic fibrosis.
B. Sweat chloride test:
This option is correct. The sweat chloride test is considered the most definitive diagnostic test for cystic fibrosis. It measures the concentration of chloride in sweat, which is typically elevated in individuals with cystic fibrosis due to defective chloride transport in sweat glands. A sweat chloride concentration above a certain threshold (usually ≥60 mmol/L) is diagnostic of cystic fibrosis, particularly when confirmed with repeat testing.
C. Stool fat content analysis:
Stool fat content analysis evaluates fat absorption and fecal fat excretion, which may be impaired in individuals with cystic fibrosis due to pancreatic insufficiency. However, while stool fat content analysis can provide supportive evidence of malabsorption in cystic fibrosis, it is not considered the most definitive test for diagnosing the condition. Stool fat content analysis is often used in conjunction with other diagnostic tests to assess pancreatic function and nutritional status in individuals with cystic fibrosis.
D. Sputum culture:
Sputum culture involves culturing respiratory secretions to identify bacterial pathogens, which can be useful for diagnosing respiratory infections in individuals with cystic fibrosis. However, sputum culture is not specific to cystic fibrosis and may show similar findings in other respiratory conditions. While respiratory cultures are important for guiding treatment in cystic fibrosis, they are not considered the most definitive test for diagnosing the condition.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Administer the medication at mealtime.Ferrous sulfate is best absorbed on an empty stomach because food, especially those rich in calcium or tannins, can interfere with its absorption. Administering it with meals reduces its effectiveness.
B.While bedtime administration is not contraindicated, it is not necessary. The timing of administration should focus on maximizing absorption, typically between meals or on an empty stomach.
C. Ferrous sulfate can stain teeth if taken orally in liquid form. Using a straw minimizes contact with teeth, reducing the risk of discoloration. Parents should also be advised to encourage the child to rinse their mouth after taking the medication.
D. Dilute the medication with 240 mL of milk. Milk contains calcium, which inhibits the absorption of iron. Ferrous sulfate should not be taken with milk or dairy products to ensure optimal absorption.
Correct Answer is A
Explanation
A. Give the child a stuffed animal: Providing a comforting item like a stuffed animal can help the child feel more secure and may offer some comfort during the parent's absence. This option is appropriate as it addresses the child's emotional needs.
B. Inform the child that her parent will be back in 2 hours: While it's helpful to provide reassurance to the child, a 2-year-old may not fully understand the concept of time, and telling them that their parent will return in 2 hours may not effectively alleviate their distress. This option may not be as immediately comforting as providing a tangible source of comfort.
C. Call the parent to return to the child's room: If possible, having the parent return to the child's room can provide the most direct comfort and reassurance to the child during a tantrum. However, it may not always be feasible for the parent to return immediately, especially if they are occupied or attending to other responsibilities.
D. Leave the child alone in the room for 5 minutes: Leaving the child alone during a tantrum can exacerbate feelings of distress and abandonment, potentially escalating the situation further. It's essential to provide support and reassurance to the child during moments of distress rather than leaving them alone.
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