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Choriocentéza: kdy a proč se provádí?

11. duben 2012

Co je „choriocentéza“? Kdy se provádí a proč? Jaká rizika plynou z vyšetření? Vysvětlení naleznete v následujících řádcích.


Choriocentéza: kdy a proč se provádí?Choriocentéza: kdy a proč se provádí?

Co je choriocentéza?

Provádí se odběrem choria klků a zjišťují se při něm chromozomální a genetické odchylky plodu. Je to vyšetření v některých částech podobné amniocentéze.

Choriové klky jsou geneticky identické s plodem a vyvíjejí se dříve než plodová voda. Potřebné informace tak získáme dříve než právě u odběru plodové vody.

Kdy a proč se vyšetření provádí?

Odběr choria probíhá zpravidla na konci prvního trimestru mezi 10.-13. týdnem těhotenství. K jeho provedení je zapotřebí vážný důvod. Tím je například podezření na chrozomální odchylky zaznamenané pomocí ultrazvuku nebo z biochemického vyšetření, či rodinná anamnéza, případně předchozí těhotenství s touto odchylkou.

Dalším důvodem je podezření na genetické postižení, které je možné určit pomocí DNA plodu.

Spolehlivost tohoto vyšetření je u některých vad až 99%, ale i tak jím nelze zjistit všechny vrozené vady jako rozštěpy, slepota, autismus. Ty jsou odhalitelné buď jen pomocí ultrazvuku či až po narození miminka.

Jaké vady může vyšetření odhalit?

  • Downův syndrom
  • Edwardsův syndrom
  • Turnerův syndrom
  • hemofilie
  • cystická fibróza
  • svalová dystrofie

Jak vyšetření probíhá?

Provádí se ambulantně a žena poté odchází domů a je jí doporučen 2-3 denní klidový režim.

Před zákrokem lékař těhotnou maminku vyšetří pomocí ultrazvuku, aby určil polohu dítěte a placenty a tím přistoupil na vhodný způsob provedení zákroku. Vzorek se tak odebírá buď přes děložní čípek nebo břišní stěnu.

Jaká jsou rizika?

  • potrat ( v 1% případů)
  • komplikace (v 10% případů) – vaginální krvácení, špinění, teplota, infekce
  • Rh senzibilizace matky – při odběru se může dostat krev matky do plodu a plod může prodělat hemolytické onemocnění, proto se po zákroku matce aplikuje injekce s imunoglobulinem.

Co následuje po oznámení výsledku?

V případě, že výsledek je pozitivní na některou z vad, následuje obvykle konzultace s lékařem – genetikem. Při vážném problému je nabídnuto ženě ukončení těhotenství (ta musí dobrovolně souhlasit), které musí ze zákona proběhnout maximálně do 24. týdne těhotenství.

Linkuj.cz!

Hodnocení

Hodnocení: 5 hvězdiček / Hodnoceno: 1x


Autor: Monika Tůmová

Momentálně jsem především maminka na rodičovské dovolené se dvěma chlapečky a třetí je na cestě... Rodičovské povinnosti a radosti si ještě zpestřuji studiem, nejprve antropologií a nyní učitelským oborem (zeměpis, základy společenských věd). Profil G+

Reklama

[Nahoru ↑]


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