SIPTU has confirmed that Wednesday's strike involving 10,000 health support workers will go ahead.
It's after this afternoons talks between the union, the HSE and the Department of Public Expenditure ended without agreement.
The dispute centres around pay and a jobs evaluation scheme, with SIPTU claiming its members are owed over 16 million euro.
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It means hospital staff including health care assistants, theatre workers, porters and chefs will down tools for a 24-hour stoppage from 8am on Wednesday.