Okuqukethwe
Kuyini i-nuchal translucency?
I-Nuchal translucency, njengoba igama lisho, itholakala entanyeni yengane. Kubangelwa ukuhlukaniswa okuncane phakathi kwesikhumba nomgogodla futhi kuhambisana nalokho okubizwa ngokuthi indawo ye-anechoic (okungukuthi engabuyisi i-echo ngesikhathi sokuhlolwa). Wonke ama-fetus ane-nuchal translucency ku-trimester yokuqala, kodwa i-nuchal translucency iyahamba. Gxila ekushintsheni kwe-nuchal.
Kungani ulinganisa i-nuchal translucency?
Ukulinganisa ukuguquguquka kwe-nuchal kuyisinyathelo sokuqala sokuhlolwa kwezifo ze-chromosomal, futhi ikakhulukazi i-trisomy 21. Ibuye isetshenziselwe ukuthola ukungahambi kahle kwe-lymphatic circulation kanye nezifo ezithile zenhliziyo. Lapho ukulinganisa kuveza ubungozi, odokotela bakubheka “njengophawu lwezingcingo”, okuyimbangela yocwaningo olwengeziwe.
Sithathwa nini isilinganiso?
Isilinganiso se-nuchal translucency kufanele senzeke ngesikhathi sokuqala kwe-ultrasound yokukhulelwa, okungukuthi phakathi kwamasonto ayi-11 nayi-14 okukhulelwa. Kubalulekile ukuthi ukuhlolwa kwenziwe ngalesi sikhathi, ngoba ngemva kwezinyanga ezintathu, i-nuchal translucency iyanyamalala.
I-Nuchal translucency: zibalwa kanjani izingozi?
Kufika ku-3 mm ubukhulu, i-nuchal translucency ibhekwa njengento evamile. Phezulu, izingozi zibalwa ngokusekelwe eminyakeni yobudala kanye nesikhathi sokukhulelwa. Lapho owesifazane emdala, izingozi ziba nkulu. Ngakolunye uhlangothi, ukukhulelwa okuthuthukisiwe kakhulu ngesikhathi sokulinganisa, ingozi iyancipha kakhulu: uma intamo ilinganisa i-4 mm emavikini angu-14, izingozi ziphansi uma zilinganisa u-4 mm emavikini angu-11.
I-Nuchal translucency measurement: ingabe ithembekile ngo-100%?
I-nuchal translucency measurement ingathola ngaphezu kuka-80% wezigameko ze-trisomy 21, kodwa u-5% wezintamo eziminyene kakhulu ziphenduka zibe positives ngamanga.
Lokhu kuhlola kudinga amasu okulinganisa anembe kakhulu. Ngesikhathi se-ultrasound, ikhwalithi yomphumela ingase iphazamiseke, isibonelo ngesimo esibi se-fetus.
I-Nuchal translucency measurement: yini elandelayo?
Ekupheleni kwalokhu kuhlolwa, ukuhlolwa kwegazi okubizwa ngokuthi i-assay of serum markers kunikezwa bonke abesifazane abakhulelwe. Imiphumela yalokhu kuhlaziywa, kuhlanganiswe nobudala bomama kanye nesilinganiso se-nuchal translucency, kwenza kube lula ukuhlola ingozi ye-trisomy 21. Uma lokhu kuphakeme, udokotela uzonikeza umama izinketho eziningana: noma i-TGNI , i-prenative non-invasive prenatal. ukuhlolwa (isampula legazi elisuka kumama) noma ukwenza i-trophoblast biopsy noma i-amniocentesis, okuhlaselayo kakhulu…. Lezi zivivinyo ezimbili zokugcina zenza kube nokwenzeka ukuhlaziya i-karyotype ye-fetus kanye nokwazi kahle ukuthi inesifo se-chromosomal. Ingozi yokuphuphuma kwezisu ibe ngu-0,1% kwesokuqala no-0,5% kwesesibili. Uma kungenjalo, i-ultrasound yenhliziyo ne-morphological izonconywa.