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A 2-year-old, previously healthy boy with an upper respiratory infection presents to the emergency department with acute-onset stridor and respiratory distress. He quickly improves with intramuscular dexamethasone and initiation of heliox via high-flow nasal cannula. He is admitted to the PICU for respiratory insufficiency, requiring heliox, and high risk of respiratory failure. Before calling the PICU team for admission, the emergency department resident sends a respiratory viral polymerase chain reaction (PCR) panel. When her attending questions its necessity, she answers, “They [PICU admitting team] will ask for it. They always want to know which bug it is.” Historically, at our institution, respiratory viral PCR panels were commonly ordered for patients with more severe disease requiring PICU admission to find the culprit virus. Local practice had evolved to sending respiratory viral PCR tests for the majority of PICU patients with respiratory complaints, even before admission.
Since its introduction, respiratory viral PCR panel–testing proponents have advocated its use to reduce unnecessary health care resource use.1–3 However, studies in which authors evaluate the clinical impact of respiratory viral PCR panel testing have varied in their results and lacked consistent evidence to support changes in management or outcomes, including antibiotic administration, chest radiographic imaging, hospital admission, and hospital length of stay.3–7 In addition, commonly held beliefs include the need to test for isolation and cohort practices or to identify treatable viruses. The Choosing Wisely guidelines of the American Society for Clinical Pathology recommend against routine, broad respiratory viral …
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