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Zorluk: ZorPediatric Respiratory Disorders

A 14-month-old boy is brought to the pediatric clinic for evaluation of a chronic, wet-sounding cough and poor weight gain. The family recently immigrated to the United States from a rural region with limited healthcare access. According to his parents, he has been hospitalized three times in the past year for what was described as "severe bronchiolitis" requiring supplemental oxygen. Between these acute episodes, he continues to have a daily cough. Despite eating vigorously, his weight has fallen from the 50th percentile at birth to the 3rd percentile currently. His mother also notes that his diapers are frequently difficult to clean due to unusually large, greasy, and foul-smelling stools. On physical examination, the child appears pale with a protuberant abdomen. Vital signs show a temperature of 37.1°C (98.8°F), pulse of 120/min, and respiratory rate of 34/min. Lung auscultation reveals diffuse coarse crackles and scattered expiratory wheezes bilaterally. Which of the following is the most appropriate next step in the management of this patient?

  1. Perform quantitative pilocarpine iontophoresisCevap
  2. B
    Initiate daily inhaled budesonide and nebulized albuterol
  3. C
    Prescribe a 14-day course of oral ciprofloxacin
  4. D
    Obtain an echocardiogram and initiate furosemide therapy
  5. E
    Administer the intranasal live-attenuated influenza vaccine

Cevap

The most appropriate next step is to perform quantitative pilocarpine iontophoresis.
The correct answer is to perform quantitative pilocarpine iontophoresis, commonly known as the sweat chloride test. This patient presents with the classic triad of cystic fibrosis (CF): recurrent sinopulmonary infections (manifesting as a chronic cough and hospitalizations for 'bronchiolitis'), exocrine pancreatic insufficiency (steatorrhea and failure to thrive despite a vigorous appetite), and a demographic history suggesting he likely missed standard newborn screening. The sweat chloride test remains the gold standard for diagnosing CF. A chloride concentration of ≥60 mmol/L\geq 60 \text{ mmol/L} on two separate occasions confirms the diagnosis, allowing for the initiation of life-saving multidisciplinary care.

Adım Adım Çözüm

1
Analyze the patient's respiratory and growth history.
The patient has a chronic wet cough and recurrent wheezing combined with severe failure to thrive (3rd percentile) despite a vigorous appetite.
This combination identifies a systemic, chronic issue rather than isolated, transient viral respiratory infections.
2
Evaluate the gastrointestinal symptoms.
The mother describes large, greasy, foul-smelling stools.
This is the hallmark of steatorrhea caused by exocrine pancreatic insufficiency, pointing strongly toward Cystic Fibrosis.
3
Determine the diagnostic test of choice based on the likely diagnosis.
Quantitative pilocarpine iontophoresis (sweat test) is selected.
Because the patient immigrated from a region with limited healthcare, newborn screening was likely missed. The sweat test is the gold standard for confirming Cystic Fibrosis.

Anahtar Kavram

Early recognition and diagnosis of Cystic Fibrosis in infants presenting with recurrent respiratory symptoms and failure to thrive.
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Konular

Pediatric Respiratory Disorders

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