Kwenguva yemakore makumi maviri, nzira iri nyore uye yakanyatsodzidzisa yakashandiswa kudzidza utero-placental ropa circulation - fetal doppler. Iyi nzira inobva pamigumisiro yekuchinja kuwanda kwekuzungunuswa kwemafunguko, akawanikwa muzana remakore rechi19 neAustria scientist H.I. Doppler, uye inoshandiswa zvakabudirira pakucherechedza kwemaininatal emadzimai ane pamuviri.
Chii chinonzi fetal dopplerometry?
Doppler inyaya yekukurumidza uye kuwedzerwa kweropa kunopinda mumuviri weamai, mbambo yembilical uye midziyo yemwana. Chinokosha chekuita izvi ndechokuti inonzi ultrasonic pulses inotumirwa nemutsara wezvigadziri mumatumbu inoratidzwa kubva kune erythrocytes inofamba mukati memidziyo uye chiratidzo chinopiwa nenzira ye ultrasound. Zvichienderana nekutungamirirwa kwekufamba uye nekukurumidza kwe erythrocytes uye, maererano nezvo, kuwandisa kwekunyenyeka kwenzwi, chigadziri chinonyora zviratidzo zvemashoko. Kubva pakuongororwa kwemashoko aya, kuwandisa kwekupararira kwekupararira kwemaamai-placenta-fetus system inotsanangurwa.
Izvi zvinopesana neongororo yakawanda yekutsvaga muropa kuti ropa rinopinda mumidziyo iri pavharizheni rinotaridzika rinoratidzwa mumarudzi akasiyana siyana zvichienderana nekukurumidza kwekufamba. Izvi zvinoda simba guru ultrasound, asi usanetseka kana doppler inokuvadza kumucheche. Ichi chidzidzo hachina ngozi zvachose kumwana uye kumamai.
Zviratidzo zve doplerometry ye fetus
Fetal ultrasound ine doppler inorayirwa vakadzi, vane mimba inofambidzana nezvirwere zvakadai se:
- gestosis;
- pyelonephritis;
- chirwere cheshuga mellitus;
- kusawirirana kweamai uye fetus neboka reropa;
- hypertension;
- collagen zvirwere.
Mukuwedzera, doppler yekuteerera fetal heartbeat inoratidzirwa nokuda kwezvisina kuonekwa zvinoonekwa ne ultrasound uye fetal cardiotocography. Izvi zvinosanganisira:
- kunonoka pakukura kwe fetus;
- kushaya mvura ;
- kukurumidza kusviba kwepa placenta;
- kukura kwechimiro chemumbilical;
- kusasarudzwa kwe fetal size panguva yekudzivirira;
- zvirwere zvechromosomal, kana kusafungira kwavari.
Ichi chidzidzo chinoitwa pamagumo ekuzvitakura kwemasvondo makumi maviri. Mushure mekugadzirisa, chiremba anopa migumisiro nechinyorwa che fetal doppler, ichiratidza mitemo kana kukanganisa mukukura kwekuzvitakura. Ichi chidzidzo chakakosha zvikuru nerubatsiro rwekuti zvinogona kuitika pamatanho ekutanga kuziva zvirwere zvakasiyana-siyana zvemucheche kana matambudziko mumuviri waamai.