I am merely using the terminology the WTS uses in the 6/15/2000 QFR. Note how whole blood, the "four primary components," and blood fractions are considered separate entities. If you accept whole blood or the "four primary components" the WTS will consider that you have DA'd yourself while blood fractions are a conscience matter. I'm sure the medical community has different vocabulary but this is the vocabulary the WTS/elders will use when determining your "spiritual" fate.
*** w00 6/15 p. 29 Questions From Readers
Do Jehovah?s Witnesses accept any medical products derived from blood?
The fundamental answer is that Jehovah?s Witnesses do not accept blood. We firmly believe that God?s law on blood is not open to reform to fit shifting opinions. Still, new issues arise because blood can now be processed into four primary components and fractions of those components....
Today, most transfusions are not of whole blood but of one of its primary components: (1) red cells; (2) white cells; (3) platelets; (4) plasma (serum), the fluid part. Depending on the condition of the patient, physicians might prescribe red cells, white cells, platelets, or plasma. Transfusing these major components allows a single unit of blood to be divided among more patients. Jehovah?s Witnesses hold that accepting whole blood or any of those four primary components violates God?s law.
Just as blood plasma can be a source of various fractions, the other primary components (red cells, white cells, platelets) can be processed to isolate smaller parts. For example, white blood cells may be a source of interferons and interleukins, used to treat some viral infections and cancers. Platelets can be processed to extract a wound-healing factor. And other medicines are coming along that involve (at least initially) extracts from blood components. Such therapies are not transfusions of those primary components; they usually involve parts or fractions thereof. Should Christians accept these fractions in medical treatment? We cannot say. The Bible does not give details, so a Christian must make his own conscientious decision before God.
Hence, some Christians reject such products, just as they reject transfusions of whole blood or of its four primary components. Their sincere, conscientious stand should be respected.