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《生殖医学杂志》
>Transvaginal color Doppler monitoring of medicinal termination of early pregnancy: analysis of prolonged bleeding and choice of indications
Transvaginal color Doppler monitoring of medicinal termination of early pregnancy: analysis of prolonged bleeding and choice of indications
Objectives:To observe trophoblastic and other blood flows after medicinal abortion, to analyze factors of prolonged bleeding, and to determine indications for medicinal termination of early pregnancy. Methods:Transvaginal color Doppler (TVCD) observation in combination with β--hCG determination in clinical trial involving 145 early pregnant women. Results: In cases of prolonged bleeding trophoblastic blood flow (TBF) is more significant. After aspiration of retained tissues, parallel to disappearance of TBF, prolonged uterine bleeding is stopped. Ectopics, lower--situated myoma and scar--site--implantation are relatively contraindicative for medicinal abortion. Too early pregnancy with too small embryonic--sac is not favourable. The sac is more difficult to be expelled. Prolonged bleeding can occur in cases of amenorrhea or recovery of menstruation due to retention of decidual tissues with microvilli. Conclusion: Retention of decidual tissues with microvilli plays an important role in the mechanism of prolonged uterine bleeding during medicinal termination of early pregnancy. TVCD is very helpful in monitoring this method. Ectopic pregnancy should be contraindicated. In cases of myoma or with history of cesarean section the location of implantation and myoma or scar should be examined by ultrasound before decision. Pregnancy of 6--7 weeks is more favorable for medicinal abortion.
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