Experts suggest the new findings have the potential to ‘revolutionise’ diagnosis for people with suspected Alzheimer’s.

A blood test could be just as accurate as painful and invasive lumbar punctures for detecting Alzheimer’s disease, research suggests.

Measuring levels of a protein called p-tau217 in the blood could be just as good at detecting the signs of Alzheimer’s, and better than a range of other tests currently under development, experts say.

The protein is a marker for biological changes that happen in the brain during Alzheimer’s disease.

The new findings have the potential to “revolutionise” diagnosis for people with suspected Alzheimer’s, experts say.

In the study of 786 people, the researchers were able to use the The ALZpath p-tau217 test to identify patients as likely, intermediate and unlikely to have Alzheimer’s disease.