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Longitudinal Doppler sonographic measurements of vascular impedance in the central and peripheral spiral arteries throughout pregnancy
Author(s) -
Hsieh YaoYuan,
Chang ChiChen,
Tsai HorngDer,
Lee ChienChung,
Tsai ChangHai
Publication year - 2000
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/(sici)1097-0096(200002)28:2<78::aid-jcu4>3.0.co;2-x
Subject(s) - medicine , peripheral , spiral (railway) , spiral artery , pregnancy , cardiology , fetus , placenta , mathematical analysis , mathematics , biology , genetics
Purpose We assessed vascular impedance in the spiral arteries in the central and peripheral placental bed throughout uncomplicated pregnancies. Methods Transabdominal color Doppler sonography was used to measure the pulsatility index (PI), resistance index (RI), and peak systolic velocity in the central and peripheral spiral arteries in 94 women with uncomplicated singleton pregnancies. Sonographic examinations took place approximately every 5 weeks from 10 to 40 weeks' menstrual age. Results PI, RI, and peak systolic velocity were not different in the central versus the peripheral segments of the spiral arteries. The PI and RI values of central spiral arteries after 25 weeks' menstrual age. The PI and RI values of peripheral arteries decreased after 20 weeks' menstrual age. Conclusions Additional subjects are needed to clarify changes in the impedance of central and peripheral spiral arteries over the course of normal and complicated pregnancies. © 2000 John Wiley & Sons, Inc. J Clin Ultrasound 28:78–82, 2000.