Aspiration due to difficulty in swallowing.

The swallowing mechanism after a propyliodone (`dionosil') swallow was studied in 44 infants, aged 6 days to 6 months, who were admitted during a 6-month period to the Paediatric Clinic of Athens University because of choking spells during feedings or persistent vomiting. Twenty-three infants showed aspiration of the opaque material into the tracheobronchial tree. The incidence of aspiration was very high.