It used to be that the blood circulation had to be 'uninterrupted' as in bypass surgery that blood was allowed to temporarily leave the body and be considered an OK treatment by the WTBTS.
Nowadays, the blood can go 'walkies' down the hall for a few days and be considered as 'continued treatment' for the WTBTS not to forcibly DA a JW.
I've got one word for WTBTS Blood Policy - FARCSICAL!
Virtually ALL the Fractions that make up blood can be used individually. But did the Goobering Brothers ever study Maths? What do Fractions make? Add them together and you get a WHOLE as in Whole Blood!
How freaky can you get?