…When blood leaves a blood vessel, it loses its fluidity; that is, it clots. This property of blood clotting is necessary for hemostasis, and if blood clotting does not occur normally, hemostasis does not occur smoothly, leading to a tendency to bleed. There are many cases in which a tendency to bleed occurs due to congenital or acquired abnormalities in the blood clotting mechanism. A typical example of a congenital condition is hemophilia. On the other hand, if blood clotting occurs within a blood vessel, thrombosis or intravascular coagulation syndrome occurs. … *Some of the terminology that refers to "extrinsic blood coagulation" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…血液は,血管外に出るとその流動性を失う。すなわち,凝固する。この血液が凝固する性質は,止血にとって必要な性質であり,血液凝固が正常に起きないと,止血が円滑に行われなくなり,出血傾向を呈するようになる。 先天的あるいは後天的に血液凝固機序が異常を呈するために,出血傾向が生ずる場合が多数存在する。先天的なものの代表は血友病である。一方,血液凝固が血管内に起こると,血栓症あるいは血管内凝固症候群が起こる。… ※「外因系血液凝固」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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