There are 593 admitted patients waiting for beds on Tuesday morning, according to the Irish Nurses and Midwives Organisation's (INMO) Trolley Watch.
A total of 461 patients are waiting in the emergency department, while 132 are in wards elsewhere in the hospital.
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University Hospital Limerick is once again the worst impacted with 106 people on trollies.
That is followed by Cork University Hospital with 69 people without beds and St Vincent's University Hospital in Dublin with 43 people on trollies.
