The latest figures from the Irish Midwives and Nurses Organisation show there are 399 people waiting for a bed in hospitals on Friday.
Some 296 patients were waiting in emergency departments, while 103 are in wards elsewhere in hospitals.
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The hospital with the highest number of patients without a bed is University Hospital Limerick, with 88 patients being treated on trolleys.
35 of those patients are in the emergency department, with 53 elsewhere in the hospital.
Cork University Hospital has 40 people on trolleys, with 36 people in the emergency department.