Intliziyo yomntwana uqala ukuvela kwiveki yesine. Ukususela ngeveki yesithandathu yokukhulelwa, umlinganiselo wesantya senhliziyo yesisu unqunywe ngoncedo lwezixhobo ezizodwa - inzwa ye-ultrasound sensor. Xa uqikelele amazinga okukhula nokuphuhliswa kwengane, izikhombisi zentliziyo ziphakathi kwezinye eziphambili. Naluphi na utshintsho oluthile kwiinkqubo zophuhliso luchaphazela izinga lentliziyo kwaye ke iingxaki zengxaki eziye zavela.
Ubume bezinga eliqhelekileyo lentliziyo yesisu lixhomekeke kwixesha lokukhulelwa. Ngezantsi kwetafile imimiselo yombutho we-HR ukuya kwixesha lokukhulelwa linikezelwa.
| Ixesha lokukhulelwa, iiveki. | Inqanaba lentliziyo, ud./min. |
|---|---|
| 5 | 80-85 |
| 6 | 102-126 |
| Wesi-7 | 126-149 |
| 8 | 149-172 |
| 9 | 175 (155-195) |
| 10 | 170 (161-179) |
| 11 | 165 (153-177) |
| 12 | 162 (150-174) |
| 13 | 159 (147-171) |
| 14-40 | 157 (146-168) |
Inqanaba lentliziyo ye-Fetal ngeveki
Ukususela kwi-5 ukuya kweyesibhozo iveki intliziyo yesanda iyanda, kwaye ukususela kwiveki yesithoba, intliziyo yesisu ishaya ngaphezulu kakhulu (ukuphambukiswa okubonakalayo kuboniswa kubazali). Emva kweveki yeshumi elinesithathu, ngexesha lokulawula intliziyo yesisu, intliziyo yezinga ngokuqhelekileyo i-159 bpm. Kule meko, ukuphambuka kwimiba ye-147-171 bpm inokwenzeka.
Ukuba kukho ukuphambuka kwizinga lentliziyo eliqhelekileyo, ugqirha uqhuba uviwo malunga nobukho be-hypoxia yangaphakathi kwe-fetus. Intliziyo ekhawulezayo ibonisa uhlobo oluthile lwe-oksijini yindlala, kwaye i-bradycardia (i-palpitation ephosakeleyo) ifomu elibi. Uhlobo olumnene lwe- hypoxia lomntwana luya kuhlala ixesha elide lomama ngaphandle kokunyakaza okanye kwigumbi elinyeneyo. Uhlobo olubi lwe-hypoxia luvela ekungeneni kwe-fetoplacental kwaye lufuna unyango olunzulu.
Ukuhlolwa kwentliziyo ye-Fetal
Umsebenzi we-cardiac we-fetus uhlolwa ngokusebenzisa i-ultrasound, i-echocardiography (ECG), ukunyusa (ukuphulaphula) kunye ne-CTG (i-cardiotocography). Kwiimeko ezininzi, i-ultrasound kuphela isetyenzisiweyo, kodwa ukuba kukho izikhalazo zentsholongwane, ezinye iikopi ezongezelelweyo zisetyenziswa. Umzekelo, i-echocardiogram yesisu, apho ingqwalasela igxininise kuphela entliziyweni. Ngosizo lwe-ECG, isakhiwo senhliziyo, imisebenzi yaso, iinqanawa ezinkulu ziyahlolwa. Ixesha elona liphezulu kakhulu le sifundo lixesha ukusuka kwishumi elinesibhozo ukuya kwi-iveki yesibhozo.
Ukususela kwiiveki ezingamashumi amathathu nesibini, i-CTG inokwenziwa, apho intliziyo yesisu kunye neengxaki ze-uterine zibhalwa ngokufanayo.