530 patients are waiting for beds in Irish hospitals this morning, according to the INMO's trolley watch figures.
University Hospital Limerick is the worst hit with 50 patients waiting for a bed.
The figures show 364 patients are waiting in the emergency department, while 166 are inwards elsewhere in the hospital.
The worst-hit hospitals are:
The news comes as nurses' unions and the HSE are due before the Labour Court today in a bid to resolve the dispute that led to a number of strike days last month.
The two sides have failed to agree on a new contract which includes productivity measures for staff.
Recruitment and retention are at the heart of the row and the INMO claim current proposals fail to address the issues.