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HBOC stands for hemoglobin based oxygen carrier. It is derived from fractionated red blood cells not plasma. The hemoglobin is stripped from the red blood cells synthetic "cells" are used to transport it (probably a gross oversimplification). Type and cross match is not necessary as in the case of red blood cells. The trade name is Hemopure.
Whether to use the product or not is a matter of personal choice among Jehovah's Witnesses.
By the way, this product is available for compassionate use only. There have been side effect and more study is needed before the product will be approved.