It says a further 40 redundancies are planned in the blood processing unit in Leeds by May 2010.
All that will remain will be a stock holding unit, which Unite believes will be insufficient for Leeds and the surrounding area.
It believes emergency blood supplies will have to come instead from Sheffield, Manchester and Newcastle.
An NBS statement confirmed that blood processing and testing services will move from Leeds by the end of May 2010.
Clive Ronaldson, NBS director of patient services, said: ‘Patient care is our overriding priority and local hospitals will see no change to the service which they receive.'
He confirmed that 76 whole-time equivalent Leeds processing and testing posts would be lost.
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