The new approach reported in the journal Nature looks for fragments of amyloid that end up in the blood stream. Trials on nearly 400 people show it's more 90% accurate.
It finds its way into very small, thin-walled capillaries, which allow materials to move in and out of the blood stream. In the case of the lungs, oxygen moves in, and carbon dioxide moves out.
On the night he met Eliza, Sir Salman walked klutzily into a glass door; he lay on the floor, blood streaming down his face, until she ministered to him.