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Investigation

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

  • investigation is probably indicated if a child has suffered a number of episodes of croup, and is especially indicated if the child was preterm
  • investigations in the acute presentation may include:
    • plain neck radiography (1)
      • the steeple sign (1)
        • posterior-anterior view - shows a narrowed column of subglottic air
        • lateral view -shows an overdistended hypopharynx
        • this sign is seen only in 50 percent of patients
    • computed tomography (1)
    • pulse oximetry (1)
  • in recurrent croup
    • bronchoscopy - probably best by a paediatric chest physician rather than an ENT surgeon since the paediatrician will investigate below the vocal cords

Reference:

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