The Red Cross is to run weekend first aid services in Tenby over the summer months if and when the minor injuries unit is closed.
Hywel Dda Health Board says the move - which is being piloted - will allow emergency nurses to be redeployed at A&E services at Withybush Hospital in Haverfordwest.
The service will run by The British Red Cross between July and September from Tenby Hospital over each weekend and during the August bank holiday.
The pilot will run alongside the minor injury service for the first few weeks to allow the health board to evaluate its impact.
Sue Lewis, County Director for Pembrokeshire said, “Having the Red Cross provide this service reflects the health board’s partnership approach to working with the third sector in more innovative ways."
Nigel Davies, senior services manager for the Red Cross, said, “We are delighted to have been asked to pilot this new service. It will be run by a group of skilled individuals."