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?
A sputum culture
Sweat chloride test
A stool fat content analysis
Pulmonary function tests
The Correct Answer is B
A. A sputum culture may be performed to identify respiratory infections but does not confirm cystic fibrosis.
B. The sweat chloride test is the gold standard diagnostic test for cystic fibrosis, measuring chloride levels in sweat.
C. A stool fat content analysis may be performed to assess pancreatic function in cystic fibrosis, but it does not confirm the diagnosis.
D. Pulmonary function tests may reveal characteristic patterns of lung disease in cystic fibrosis but are not diagnostic on their own.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. An elevated heart rate can be expected in infants with bronchiolitis due to increased work of breathing.
B. A slight elevation in temperature may be indicative of infection but is not an immediate concern.
C. A respiratory rate of 74 breaths per minute may indicate respiratory distress and warrants immediate attention.
D. A blood pressure of 90/60 mmHg is within the normal range for infants and not immediately concerning.
Correct Answer is C
Explanation
A. Weight loss is not typically associated with heart failure in toddlers; weight gain or failure to thrive may occur.
B. Bradycardia is not typically associated with heart failure; tachycardia may occur due to compensatory mechanisms.
C. Orthopnea, difficulty breathing when lying flat, is a common symptom of heart failure in toddlers and adults.
D. Decreased urine output, rather than increased, is more typical in heart failure due to decreased cardiac output and renal perfusion.
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