There was no ambulances available for a time across Cavan and Monaghan over the weekend.
There was 11 ambulances in the night time fleet covering the north east on Saturday night but for a time all ambulances were in the car park of Our Lady of Lourdes in Drogheda as the hospital had become inundated with patients.
Meath West TD Peadar Tóibín said the backlog left Cavan, Monaghan, Meath and Louth without any ambulances for a time.
Some crews were waiting outside the emergency department in Drogheda for up to five hours before there was a place for their patient.
Ambulance crews treated patients as they remained parked up in the hospital car park in Our Lady of Lourdes in Drogheda while others were brought inside on their trolleys.
None of the ambulances could leave and respond to other 999 calls across the region until they had their ambulance trolleys back.
Peadar Tóibín, the Leader of Aontu says patients could not be accepted by Our Lady of Lourdes in Drogheda:
