目的为体外构建组织工程瓣提供脱细胞的同种生物瓣支架材料，并建立相应的技术方法。
Objective To provide the scaffold material of decellularized homograft bioprosthetic valve (HBV)for establishing of tissue engineering cardiac valve in vitro, and related technique.
天然胶原类组织，经过脱细胞处理后，降低免疫原性，可作为组织工程的支架材料，本文就脱细胞的方法以及无细胞胶原基质的研究进展作一综述。
As scaffold, nature collagen must be decellularized to decrease its immunity. The methods of decellularization and the progress of study on acellular collagen matrix are reviewed in this article.
采集一品脱血液后，将其加工成可输血的成分：血浆、血小板和红细胞。
After a pint of blood is collected, it is processed into its transfusible components: plasma, platelets and red blood cells.
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