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- Title
Prospective evaluation of renal artery resistance and pulsatility indices in normal pregnant women.
- Authors
Dib, F. R.; Duarte, G.; Sala, M. M.; Ferriani, R. A.; Berezowski, A. T.
- Abstract
Objectives To establish normal values for renal artery resistance index (RI) and pulsatility index (RI) during gestation and, by comparison with non-pregnant controls, to determine if pregnancy affects these indices. Methods This was a prospective longitudinal study involving 36 normal pregnant women who underwent a total of 280 examinations at 4-week intervals from the 6th gestational week to the end of pregnancy. High-resolution ultrasound equipment with ‘triplex’ Doppler facilities was used. RI and PI were obtained for the main arteries of both kidneys. The same evaluation was performed in 15 non-pregnant women as controls. Results The mean RI in pregnant and non-pregnant women was the same (0.65 ± 0.03 for controls and 0.65 ± 0.02 for the pregnant women). For PI, the values were 1.25 ± 0.12 for non-pregnant women and 1.18 ± 0.09 for pregnant women. The only statistical difference (P < 0.05) was found between the PI of the left renal artery in the control group (1.29 ± 0.20) and that in the pregnant group at the 8–12-week interval of gestational age (1.08 ± 0.14). Conclusions No significant alterations in renal artery RI and P1 occur during normal pregnancy, except for in a subgroup of patients between 8 and 12 weeks of gestation.
- Subjects
RENAL artery obstruction; VASCULAR diseases; PREGNANT women; GESTATIONAL age; DURATION of pregnancy
- Publication
Ultrasound in Obstetrics & Gynecology, 2003, Vol 22, Issue 5, p515
- ISSN
0960-7692
- Publication type
Article
- DOI
10.1002/uog.240