Tomorrow's strike by 10,000 health support workers will go ahead, in their pay-dispute with government.
Talks between SIPTU, the HSE and Department of Public Expenditure ended last evening without agreement.
It means healthcare assistants, chefs, porters, cleaners and theatre staff will be among those to down tools from 8am tomorrow morning for 24 hours.
The strike will result in the cancellation of a number of scope procedures and some elective procedures, as well as some outpatient appointments.
Mayo, Sligo, Roscommon and Galway University Hospitals will be affected, as well as Merlin Park and Portiuncla Hospitals.
The HSE says the strike will have a significant impact on services, with some procedures either having to be deferred or cancelled.