Mwoyo wemukomana unotanga kuumbwa kubva kwevhiki yechina. Kutanga kubva pavhiki yechitanhatu yekuzvitakura, kuyerwa kwema fetal heart rate kunotsanangurwa nekubatsirwa kwemichina yakakosha - inonzi transvaginal ultrasound sensor. Kana uchitarisa matanho ekukura uye kubudirira kwechecheche, mwoyo yezvikwereti zviratidzo ndeimwe yezvinhu zvikuru. Chero kushanduka kwehutano muhutano hunochinja hutano hwemwoyo uye naizvozvo zviratidzo zvezviratidzo zvakasimuka.
Kuwedzerwa kwemazuva ose ekuberekwa kwemwoyo we fetus kunobva pane nguva yekuzvitakura. Pasi petafura mitemo yemakambani eHR kusvika panguva yekuzvitakura inopiwa.
| Nguva yekuzvitakura, vhiki. | Nhamo ye mwoyo, ud./min. |
|---|---|
| 5 | 80-85 |
| 6th | 102-126 |
| 7th | 126-149 |
| 8th | 149-172 |
| 9th | 175 (155-195) |
| 10 | 170 (161-179) |
| 11th | 165 (153-177) |
| 12th | 162 (150-174) |
| 13th | 159 (147-171) |
| 14-40 | 157 (146-168) |
Fetal heart rate nemavhiki
Kubva pa55 kusvika kumavhiki vhiki masere mwoyo inowedzera, uye kutanga kubva pavhiki yepfumbamwe, moyo we fetal unobata zvimwe zvakafanana (zvinokanganisa zvinokonzerwa zvinoratidzirwa pakati pevabereki). Mushure mevhiki yegumi nematatu, panguva yekutonga kwemwoyo we fetus, mwoyo wekuda kazhinji 159 bpm. Munyaya iyi, kukanganisa mukati me 147-171 bpm kunogona.
Kana pane kukanganisa kubva pamutengo wemwoyo wakakwana, chiremba anoitisa kuongororwa kwekuvapo kwe intrauterine hypoxia mu fetus. Kushanda kwemwoyo kunokurumidza kuratidza hunyoro hwehupenyu hwekushaya oxygen, uye bradycardia (chirwere chinoputika) chimiro chakakomba. Mhando ine unyoro ye hypoxia ye fetus inogona kuuya kuburikidza nekugara kwenguva refu kweamai pasina kufamba kana kuti muimba inoputika. Nzira yakaoma ye hypo hypoia inouya kuburikidza ne fetoplacental kusakwana uye inoda kurapwa kwakanyanya.
Fetal heartbeat monitoring
Chimiro chemuviri we fetus inoshandiswa uchishandisa ultrasound, echocardiography (ECG), auscultation (kuteerera) uye CTG (cardiotocography). Muzviitiko zvakawanda, kungoitwa ultrasound chete kunoshandiswa, asi kana kune zvikonzero zvekurwara, ipapo zvidzidzo zvinowedzera zvinoshandiswa. Semuenzaniso, echocardiogram ye fetus, iyo iyo pfungwa inongowanikwa pamwoyo chete. Nekubatsira kweEEC, chimiro chemwoyo, mabasa ayo, midziyo huru inoongororwa. Nguva yakanakisisa yekudzidza iyi ndeye kubva panguva yegumi nemasere kusvikira pamakumi maviri nemasere evhiki.
Kutanga kubva pamakumi matatu nemakumi maviri vhiki, CTG inogona kuitwa, umo kubatwa kwemwoyo kwema fetus neyeterine contractions panguva imwechete yakanyorwa.