Kwiiveki ezingama-18 ukuya ku-21 ibhinqa inqunywe ukuhlolwa kweesibini zokubhenca. Ukususela kwiiveki ezingama-24 kuphela, ukukhulelwa kungaphazanyiswa ngenxa yeemeko zonyango, kwimibuzo yesibini yokuhlola ukuba oogqirha kufuneka baqinisekiswe ukungabikho kwemfucuza yokuzalwa engumntwana kumntwana. Ukuba kuyimfuneko, ngeli thuba kunokwenzeka ukufumana iimviwo zokubonisana kumaziko ogqirha afanelekileyo - ukuqinisekisa isiphoso okanye ukususa ukuxilongwa kunye nexesha elidlulileyo leli liiveki ezingama-21 zokukhulelwa. Ngamanye amaxesha kunokubonakala ngathi i- 3-D i-ultrasound ngeli xesha iya kunceda ukuxilonga ngokugqithiseleyo i-pathology ehlukeneyo, kodwa ukuhlolwa kwe-ultrasound konke akuxhomeki kuphela kwizikhono zeso sixhobo, kodwa nakwi-qualification yodokotela.
Umlinganiselo we-ultrasound kwiiveki ezingama-21 zokubamba
Kwiiveki ezingama-20 ukuya kwe-21 zokukhulelwa, ubukhulu becala be-ultrasound zilandelayo:
- ngeveki 21, ubukhulu bomyinge we-fetus ngu-300 g;
- ubude bomzimba - ukuya kwi-16 ukuya kwe-18 cm;
- I-BDP (ubukhulu biparietal yekrele) - 48.4 - 51.6 mm;
- I-LTE (ubukhulu beparietal ngobukhulu bekhayi) - 60 - 64 mm;
- DB (ubude bethanga) - 33.1 - 35.3 mm;
- I-SJ (ububanzi bentsholongwane yesisu) - 49.3 - 52.5 mm;
- I-SDHK (isisindo somlinganiselo wesifuba) - 43.2 - 46.4 mm;
- Ubunzima be-placenta - 25 - 26 mm, ngokungafaniyo ngaphandle kweengxaki zokugula, i-zero degree of mature;
- Ukuphakama kwikholam ye-amniotic fluid ivela kwi-35 ukuya kuma-70 mm, amanzi kufuneka ahlambuluke.
Ngelo thuba, kuyimfuneko ukujonga ukuba kukho onke ama-4 amagumbi entliziyo kunye nemeko yeenqanawa, jonga inkambo yeenqanawa eziphambili, uvavanyo lwentliziyo ye-fetal ngeli xesha-ukusuka ku-120 ukuya ku-160 ngomzuzu, isantya senhliziyo , ukunyakaza okusebenzayo-kungaphantsi kwe-15 ngeyure.
Kwangoku nje ngeli xesha umfazi kufuneka azive uhambo lokuqala lwe-fetus, kodwa basoloko bebuthathaka kwaye bengaqhelekanga, kodwa kwi-ultrasound ibonwa kakuhle. Isikhundla se-fetus kwisibeleko asikazinzile - ngeli xesha, liyakwazi ukujika kangangexesha elithile. Iziphumo ze-ultrasound, xa iiveki ezingama-21 zokukhulelwa ziqala, kufuneka zibandakanye umlinganiselo wezakhiwo zobuchopho bomntu ngamnye: i-ventricles yengqondo, i-cerebellum, umthombo omkhulu. Qinisekisa ukuba ulinganisa ubude bazo onke amathambo omzimba womntwana, khangela isakhiwo sezandla kunye neenyawo. Kwisisu esiswini se-fetus, isakhiwo sesibindi, ubukho besisu nesisu, imeko yezintso kunye namathumbu ayahlolwa.
I-ultrasound ekukhulelweni kwiveki 21-22
Ngeveki, iiparameters eziphambili ze-ultrasound sele ziguqule kakhulu kwaye zineemigaqo ezilandelayo:
- BDP (ubukhulu biparietal yekrele) - 51.6 - 54.2 mm;
- DB (ubude bethanga) - 35.3 - 38.3 mm;
- I-LTE (ubukhulu beparietal ngobukhulu bekrele) - 64 - 67 mm;
- I-SJ (ububanzi bentsholongwane yesisu) - 52.5 - 56.4 mm;
- I-SDHK (isisindo somlinganiselo wesifuba) - 46.4 - 49.4 mm.
Zonke iimviwo zeemeko zomntwana, okufuneka zenziwe kwi-test test, ziqhubeke zenziwa ngeli xesha. Iiveki ezingama-21 zokukhulelwa lixesha apho isondo somntwana lubonakala ngokucacileyo kwi-ultrasound: intombazana okanye inkwenkwana. Ngeli xesha, nayiphi na ukuphambuka okuvela kwinto eqhelekileyo ye-ultrasound kufuneka ixoxwe kunye neengcali ezifanelekileyo zokuxilongwa okuhambelanayo kwaye ezingahambelani nobomi bentsholongwane yokuphuhliswa.