Kan tahlillerinde PLT diye ge\u00e7en trombositler, herhangi bir organ\u0131n yap\u0131s\u0131na kat\u0131lmamas\u0131na ra\u011fmen insan\u0131n dola\u015f\u0131m sistemi i\u00e7in hayati \u00f6neme sahip h\u00fccrelerdir. Kanda k\u00fc\u00e7\u00fck pulcuklar halinde bulunan trombositler normal bir h\u00fccreden y\u00fcz kat daha k\u00fc\u00e7\u00fckt\u00fcr. Buna ra\u011fmen kan\u0131n p\u0131ht\u0131la\u015fmas\u0131nda \u00e7ok \u00f6nemli bir rol oynarlar.<\/p>\n
Bir trombosit, ortalama 2 – 3 mikrometre b\u00fcy\u00fckl\u00fc\u011f\u00fcndedir. H\u00fccreyle k\u0131yasland\u0131\u011f\u0131nda boyutu bir otomobildeki benzin kapa\u011f\u0131 kadard\u0131r. Kemik ili\u011findeki megakaryosit adl\u0131 h\u00fccrelerin par\u00e7alanmas\u0131yla olu\u015furlar.<\/p>\n
Trombositlerin \u00f6mr\u00fc dola\u015f\u0131m sisteminde 5 – 9 g\u00fcnd\u00fcr. Bir insanda normal \u015fartlarda ortalana 150bin – 400 bin aras\u0131 trombosit h\u00fccresi bulunur.<\/p>\n
En temel g\u00f6revi, insan\u0131n her hangi bir yeri yaralan\u0131p kanamaya ba\u015flad\u0131\u011f\u0131 zaman kan kayb\u0131n\u0131 engellemek i\u00e7in kan\u0131n p\u0131ht\u0131la\u015fmas\u0131n\u0131 sa\u011flamakt\u0131r. Serotonin adl\u0131 kimyasal\u0131n damarlardan salg\u0131lanmas\u0131na yard\u0131mc\u0131 olmas\u0131 ve beta-defensin-2 salg\u0131s\u0131n\u0131 tetiklemesi di\u011fer g\u00f6revleridir. Ba\u011f\u0131\u015f\u0131kl\u0131kla ilgili bakterileri dala\u011fa y\u00f6nlendirme i\u015fini de bu h\u00fccreler icra ederler.<\/p>\n
Kanda trombosit h\u00fccrelerinin say\u0131s\u0131n\u0131n fazla olmas\u0131d\u0131r. Bu fazlal\u0131k p\u0131ht\u0131la\u015fmay\u0131 h\u0131zland\u0131r\u0131r. \u00c7ok artt\u0131\u011f\u0131 zaman ise p\u0131ht\u0131 par\u00e7alar\u0131 olu\u015fur. Bu p\u0131nt\u0131lar\u0131n k\u00fc\u00e7\u00fck kan damarlar\u0131n\u0131n t\u0131kanmalar\u0131na yol a\u00e7abilir.<\/p>\n
Bu t\u0131kanmalar kalbi besleyen koroner dedi\u011fimiz damarlarda olursa enfakt\u00fcs gibi hastal\u0131klara neden olur. Sen y\u0131llarda bu p\u0131ht\u0131la\u015fmay\u0131 \u00e7\u00f6zen ve p\u0131ht\u0131la\u015fmay\u0131 \u00f6nleyen il\u00e2\u00e7lar bulunmu\u015f ve kullan\u0131lmaktad\u0131r.<\/p>\n
PLT D\u00fc\u015f\u00fckl\u00fc\u011f\u00fc Nedir, trombosit d\u00fc\u015ferse ne olur?
\nKandaki trombosit miktar\u0131n\u0131n 150 binin alt\u0131na d\u00fc\u015fmesidir. B\u00f6yle olursa kan\u0131n p\u0131ht\u0131la\u015fmas\u0131 gecikebilir. Bu da insanlar i\u00e7in tehlikelidir. \u00d6rne\u011fin yaraland\u0131\u011f\u0131n\u0131zda kan p\u0131htala\u015famaz ve akmaya devam eder ve v\u00fccut kan kayb\u0131 ya\u015far.<\/p>\n
A\u015fa\u011f\u0131daki videoda trombosit olu\u015fumu ve p\u0131ht\u0131la\u015fma animasyonu g\u00f6r\u00fclmektedir:<\/p>\n