Lege Artis Medicinae

[Investigation of uterine circulation by transvaginal color doppler in early pregnancy]

SZABÓ István1, CSABAY László1, NÉMET János1, PAPP Zoltán1

SEPTEMBER 29, 1993

Lege Artis Medicinae - 1993;3(09)

[The circulatory changes and the characteristics of blood flow in certain uterine vessels can be detected by transvaginal color Doppler in early pregnancy. The uterine circulation of 53 patients with normal intrauterine pregnancies at 4–14 weeks of gestation and 104 non pregnant patients were investigated. The main uterine artery, arcuated and spiral arteries were demonstrated by color Doppler in all patients in early pregnancy and characteristic flow velocity waveforms were obtained in 94% of the cases. The impedance to flow in the main uterine artery was significantly lower and the mean velocity was significantly higher in early pregnancy than in non pregnant patients. The indices of impedance to flow decreased with gestation in the uterine branches and there was a progressive fall in these indices from the uterine artery to the spiral arteries. Mean blood velocity in the uterine artery increased with gestation. The hemodynamical changes which are proportional to gestation age give an indirect evidence of the adequate maternal blood supply for the growing embryo.]

AFFILIATIONS

  1. Semmelweis Orvostudományi Egyetem I. sz. Szülészeti és Nőgyógyászati Klinika Budapest

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