Investigation
- 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
- the steeple sign (1)
- computed tomography (1)
- pulse oximetry (1)
- plain neck radiography (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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