At one point he also collided with the parapet of a bridge, leaving it damaged.
Jail sentence ‘inevitable’
Ellis previously pled guilty to charges of theft, dangerous driving, drink-driving, driving with an expired licence and without insurance over the incident, which happened on November 18 last year.
He drove the ambulance with 32 microgrammes of alcohol in 100ml of breath. The legal limit is 22 microgrammes.
He also admitted breaching a non-harassment order.
Graham Ellis being led away from Aberdeen Sheriff Court
Ellis had faced a further charge of assault to injury on his pregnant girlfriend, which he denied.
Sentence was deferred on Ellis, described in court papers as a prisoner of HMP Grampian, until next month for reports, but the court heard he will face a jail sentence in due course.