Caracterização dos parâmetros dopplervelocimétricos nas artérias uterinas maternas no primeiro e segundo trimestres da gestação.

Abstract

The aim of this study was to evaluate the resistance and pulsatility indices in the uterine artery during the first and second trimester of pregnancy. We carried out a longitudinal study on 40 normal women between the 8th-12th and in the 22th weeks of gestation. Doppler velocimetry was performed in both uterine arteries on the basis of resistance (RI) and pulsatility (PI) indices. We used a sample volume of 1 mm, a wall filter of 50 to 100 Hz, and a insonation angle below 60°. The first-trimester uterine artery RI and PI indices were higher from 8th to 12th than in the 22th weeks of gestation. The first-trimester uterine artery RI and PI with a notch were 0,83 ± 0,07 and 2,32 ± 0,79 and without a notch were 0,71 ± 0,16 and 1,61 ± 0,78, respectively. In the second trimester uterine artery RI and PI indices with a notch were 0,59 ± 0,09 and 1,03 ± 0,32 and without a notch were 0,44 ± 0,09 e 0,63 ± 0,19, respectively. Uterine artery RI and PI indices are higher between the 8th-12th than in the 22th weeks of gestation. RI and PI indices are higher in the presence than in the absence of a uterine artery diastolic notch.