The INMO has today released figures showing the worst November on record for hospital overcrowding.
Over 12,600 patients have been without beds on trolleys in Irish hospitals this month.
Sligo University hospital and Galway University Hospital were among the top five most overcrowded hospitals nationally.
There were 783 patients admitted without beds to Sligo University Hospital and 703 to Galway University Hospital since the start of the month.
INMO General Secretary, Phil Ní Sheaghdha says it has been another chaotic month in Irish hospitals and this cannot be allowed to continue.
There are 632 patients without a bed in Irish hospitals today.
41 patients on trolleys today at Galway University Hospital, 28 at Sligo University Hospital, 18 at Mayo University Hospital and 9 at Portiuncula University Hospital