Table 1. Principal problems associated with under- and oversedation.

Insufficient level of sedation

Inadequate imaging quality owing to motion effect

Repeat study and associated additional radiation burden

Psychological negative impact on children related to repeat investigations

Family burden forcing parents to take an additional day off or arranging childcare for repeat imaging

Increased cost of procedure

Oversedation

Respiratory insufficiency

Cardiocirculatory depression

Aspiration

Vomiting