scholarly journals First trimester trophoblast and placental bed vascular volume measurements in IVF or IVF/ICSI pregnancies

2014 ◽  
Vol 29 (12) ◽  
pp. 2644-2649 ◽  
Author(s):  
M. S. Rifouna ◽  
A. D. Reus ◽  
A. H. J. Koning ◽  
P. J. van der Spek ◽  
N. Exalto ◽  
...  
Keyword(s):  
First Trimester ◽  
Vascular Volume ◽  
Volume Measurements

scholarly journals OP02.01: Early first trimester 3D-US trophoblast volume measurements using VOCAL technique

2012 ◽  
Vol 40 (S1) ◽  
pp. 58-58
Author(s):  
A. Reus ◽  
H. El-Harbachi ◽  
M. Rousian ◽  
N. Exalto ◽  
W. Hop ◽  
...  
Keyword(s):  
First Trimester ◽  
Vocal Technique ◽  
Volume Measurements

Early Pregnancy Placental Bed and Fetal Vascular Volume Measurements Using 3-D Virtual Reality

2014 ◽  
Vol 40 (8) ◽  
pp. 1796-1803 ◽  
Author(s):  
Averil D. Reus ◽  
Josine Klop-van der Aa ◽  
Maria S. Rifouna ◽  
Anton H.J. Koning ◽  
Niek Exalto ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Early Pregnancy ◽  
Vascular Volume ◽  
Volume Measurements

scholarly journals Corpus luteum number and the maternal renin-angiotensin-aldosterone system as determinants of utero-placental (vascular) development: the Rotterdam Periconceptional Cohort

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Rosalieke E. Wiegel ◽  
Maud J. H. Karsten ◽  
Igna F. Reijnders ◽  
Lenie van Rossem ◽  
Sten P. Willemsen ◽  
...  
Keyword(s):  
Corpus Luteum ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Uterine Artery ◽  
Vascular Development ◽  
First Trimester ◽  
Placental Weight ◽  
Renin Angiotensin Aldosterone System ◽  
Vascular Volume ◽  
Placental Volume

Abstract Background Pregnancies with > 1 corpus luteum (CL) display a hyperdynamic circulation and an increased risk of small-for-gestational age deliveries. Among the factors released by the CL is prorenin, the inactive precursor of renin. Since the renin-angiotensin-aldosterone system (RAAS) is involved in early hemodynamic pregnancy adaptation, we linked both CL number and first-trimester concentrations of prorenin (as an indicator of RAAS activity) and the aldosterone/renin ratio (as an indicator of angiotensin-independent aldosterone effectiveness) to non-invasive markers of utero-placental (vascular) development, measured longitudinally from the first trimester onwards. Methods A total of 201 women, who conceived naturally or after in-vitro fertilization treatment (with 0 (n = 8), 1 (n = 143), or > 1 (n = 51) CL), were selected from the Rotterdam Periconceptional Cohort. Maternal RAAS components were determined at 11 weeks gestation. Placental volume and utero-placental vascular volume were measured from transvaginal 3D ultrasound scans at 7, 9 and 11 weeks gestation, pulsatility and resistance indices of the uterine arteries were assessed by pulsed wave Doppler ultrasounds at 7, 9, 11, 13, 22 and 32 weeks gestation. At birth placental weight was obtained using standardized procedures. Results Pregnancies without a CL show lower uterine artery indices throughout gestation than 1 CL and > 1 CL pregnancies, while parameters of placental development are comparable among the CL groups. After adjustment for patient- and treatment-related factors, first-trimester prorenin concentrations are positively associated with uterine artery pulsatility and resistance indices (β 0.06, 95% CI 0.01;0.12, p = 0.04 and β 0.10, 95% CI 0.01;0.20, p = 0.04, respectively), while high prorenin concentrations are negatively associated with first-trimester utero-placental vascular volume (β -0.23, 95% CI -0.44;-0.02, p = 0.04) and placental weight (β -93.8, 95%CI -160.3;-27.4, p = 0.006). In contrast, the aldosterone/renin ratio is positively associated with first-trimester placental volume (β 0.12, 95% CI 0.01;0.24, p = 0.04). Conclusions The absence of a CL, resulting in low prorenin concentrations, associates with low uterine artery pulsatility and resistance, while high prorenin concentrations associate with a low utero-placental vascular volume and weight. These data support a scenario in which excess prorenin, by upregulating angiotensin II, increases uterine resistance, thereby preventing normal placental (vascular) development, and increasing the risk of small-for-gestational age deliveries. Simultaneously, high aldosterone concentrations, by ensuring volume expansion, exert the opposite.

The predictive value of first trimester fetal volume measurements, a prospective cohort study

2013 ◽  
Vol 89 (5) ◽  
pp. 321-326 ◽  
Author(s):  
Nicol A.C. Smeets ◽  
Bjorn Winkens ◽  
Marc Prudon ◽  
Joost van de Ven ◽  
Vera P.J. Gondrie ◽  
...  
Keyword(s):  
Cohort Study ◽  
Prospective Cohort Study ◽  
Predictive Value ◽  
Prospective Cohort ◽  
First Trimester ◽  
Volume Measurements

Effect of acute hyaluronidase treatment of the glycocalyx on tracer-based whole body vascular volume estimates in mice

2013 ◽  
Vol 114 (9) ◽  
pp. 1132-1140 ◽  
Author(s):  
Jurgen W. G. E. VanTeeffelen ◽  
Judith Brands ◽  
Ben J. A. Janssen ◽  
Hans Vink
Keyword(s):  
Barrier Properties ◽  
Distribution Volume ◽  
The Body ◽  
Endothelial Glycocalyx ◽  
Whole Body ◽  
Differential Distribution ◽  
Vascular Volume ◽  
Body Distribution ◽  
Volume Measurements ◽  
Tracer Dilution

The endothelial glycocalyx forms a hyaluronan-containing interface between the flowing blood and the endothelium throughout the body. By comparing the systemic distribution of a small glycocalyx-accessible tracer vs. a large circulating plasma tracer, the size-selective barrier properties of the glycocalyx have recently been utilized to estimate whole body glycocalyx volumes in humans and animals, but a comprehensive validation of this approach has been lacking at the moment. In the present study, we compared, in anesthetized, ventilated C57Bl/6 mice, the whole body distribution of small (40 kDa) dextrans (Texas Red labeled; Dex40) vs. that of intermediate (70 kDa) and large (500 kDa) dextrans (both FITC labeled; Dex70 and Dex500, respectively) using tracer dilution and vs. that of circulating plasma, as derived from the dilution of fluorescein-labeled red blood cells and large-vessel hematocrit. The contribution of the glycocalyx was evaluated by intravenous infusion of a bolus of the enzyme hyaluronidase. In saline-treated control mice, distribution volume (in ml) differed between tracers ( P < 0.05; ANOVA) in the following order: Dex40 (0.97 ± 0.04) > Dex70 (0.90 ± 0.04) > Dex500 (0.81 ± 0.10) > plasma (0.71 ± 0.02), resulting in an inaccessible vascular volume, i.e., compared with the distribution volume of Dex40, of 0.03 ± 0.01, 0.15 ± 0.04, and 0.31 ± 0.05 ml for Dex70, Dex500, and plasma, respectively. In hyaluronidase-treated mice, Dex70 and Dex40 volumes were not different from each other, and inaccessible vascular volumes for Dex500 (0.03 ± 0.03) and plasma (0.14 ± 0.05) were smaller ( P < 0.05) than those in control animals. Clearance of Dex70 and Dex500 from the circulation was enhanced ( P < 0.05) in hyaluronidase-treated vs. control mice. These results indicate that the glycocalyx contributes to size-dependent differences in whole body vascular distribution of plasma solutes in mice. Whole body vascular volume measurements based on the differential distribution of glycocalyx-selective tracers appear appropriate for the detection of generalized glycocalyx degradation in experimental animals and humans.

scholarly journals OP21.01: Early pregnancy placental bed and foetal vascular volume measurements using three dimensional virtual reality

2012 ◽  
Vol 40 (S1) ◽  
pp. 116-116
Author(s):  
A. Reus ◽  
J. Aa van der ◽  
M. S. Rifouna ◽  
A. H. Koning ◽  
N. Exalto ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Early Pregnancy ◽  
Three Dimensional ◽  
Vascular Volume ◽  
Volume Measurements

scholarly journals P12.09: 3D sonography in gestational and placental volume measurements in women with first trimester bleeding

2005 ◽  
Vol 26 (4) ◽  
pp. 456-456
Author(s):  
D. Borowski ◽  
A. C Czekierdowski ◽  
B. C. Czuba ◽  
K. S. Szaflik ◽  
J. K. Kotarski ◽  
...  
Keyword(s):  
First Trimester ◽  
Volume Measurements ◽  
3D Sonography ◽  
Placental Volume

368: Adolescent Varicocelectomy: Does Lymphatic Ligation Enhance left Testicular volume Measurements?

2007 ◽  
Vol 177 (4S) ◽  
pp. 122-122
Author(s):  
Stephen A. Poon ◽  
G. Joel DeCastro ◽  
Carl K. Gjertson ◽  
Kenneth I. Glassberg
Keyword(s):  
Testicular Volume ◽  
Volume Measurements
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