There are a total of 571 admitted patients without beds on Thursday morning according to the Irish Nurses and Midwives Organisation's (INMO) trolley watch.
There are 375 patients waiting in the emergency department, while 196 are in wards elsewhere in the hospital.
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University Hospital Limerick is the most overcrowded with 95 people on trollies followed by Cork University Hospital with 65 people without beds on Thursday morning.
University Hospital Galway is the next hospital with the most people on trollies with 42 and then Sligo University Hospital with 38 people without beds.