Please use this identifier to cite or link to this item:
https://hdl.handle.net/11499/5243
Title: | Renal vein Doppler ultrasound of maternal kidneys in normal second and third trimester pregnancy | Authors: | Karabulut, Nevzat Yagcı, Ahmet Baki Karabulut, Aysun |
Keywords: | adult article blood vessel compliance clinical trial controlled clinical trial controlled study disease classification Doppler echography female gestational age human hydronephrosis kidney kidney blood flow kidney disease kidney vein major clinical study oscillation pathophysiology pregnancy prospective study pyelocaliectasis second trimester pregnancy symptomatology third trimester pregnancy tissue pressure ultrasound scanner ureter obstruction waveform Adult Diagnosis, Differential Dilatation, Pathologic Female Humans Kidney Pregnancy Pregnancy Complications Pregnancy Trimester, Second Pregnancy Trimester, Third Renal Circulation Renal Veins Ultrasonography, Doppler, Color Ureteral Obstruction Vascular Resistance |
Abstract: | The flow pattern in intrarenal veins depends on renal parenchymal histology and cardiac physiology. The intrarenal venous impedance index obtained by Doppler ultrasound is related to compliance in vein, and can be helpful in the assessment of renal parenchymal compliance. The purpose of this study was to determine whether normal pregnancy has a significant effect on intrarenal venous blood flow, and assess if the physiological pyelocaliectasis causes a measurable reduction in venous impedance indexes in pregnant women. Doppler ultrasound of intrarenal veins was performed in 35 asymptomatic pregnant women in the second and third trimester of gestation, and in 24 non-pregnant healthy women. After grading the degree of hydronephrosis, venous impedance index was obtained from the interlobar veins. The venous waveforms in pregnant women showed diminished phasic oscillations owing to elevated pre-systolic flow. The mean venous impedance indexes in pregnant women were significantly lower than the values in non-pregnant subjects, 0.30 ± 0.10 versus 0.44 ± 0.06 in the right (p<0.001), and 0.36 ± 0.11 versus 0.41 ± 0.07 in the left kidney (p=0.03). There was an inverse correlation between the grade of pelvicalyceal dilatation and the venous impedance indexes in both kidneys in pregnant women (r=-0.62, p<0.001 for the right kidney, and r=-0.38, p=0.05 for the left kidney). An abnormally reduced venous impedance index in pregnant women can at least in part be explained by reduced vascular compliance from increased interstitial pressure subsequent to partial obstruction of ureters by the gravid uterus, and caution should be exercised in interpreting it as a sign of pathological ureteral obstruction. | URI: | https://hdl.handle.net/11499/5243 https://doi.org/10.1259/bjr/81976752 |
ISSN: | 0007-1285 |
Appears in Collections: | PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection Tıp Fakültesi Koleksiyonu WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
Show full item record
CORE Recommender
SCOPUSTM
Citations
30
checked on Sep 30, 2024
WEB OF SCIENCETM
Citations
30
checked on Sep 16, 2024
Page view(s)
48
checked on Aug 24, 2024
Google ScholarTM
Check
Altmetric
Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.