The Irish Nurses and Midwives Organisation claims 2018 was the worst year on record for hospital overcrowding.
Almost seven and a half thousand patients waited without a bed at Galway University last year, making it the third worst hospital affected nationally.
New analysis from the INMO said in excess of 108,000 patients went without hospital beds last year - a record high.
The figures are a 9% increase on 2017, which was itself a record high.
This is nearly double the number in 2006 (55,720), when INMO records began.
It blames overcrowding on low capacity and understaffing.
The INMO said it has asked the Government to work with it to try to resolve problems with recruitment and retention in nursing.
It says this has not happened, and that 95% of INMO nurses and midwives voted in favour of industrial action.
The INMO executive will meet next week to set dates for strike action.