scholarly journals Evaluation of Umbilical Vein Blood Volume Flow in Preeclampsia by Angle‐Independent 3D Sonography

2017 ◽  
Vol 37 (7) ◽  
pp. 1633-1640 ◽  
Author(s):  
Stephen Z. Pinter ◽  
Oliver D. Kripfgans ◽  
Marjorie C. Treadwell ◽  
Anna W. Kneitel ◽  
J. Brian Fowlkes ◽  
...  
Keyword(s):  
Blood Volume ◽  
Umbilical Vein ◽  
Volume Flow ◽  
3D Sonography

scholarly journals Correction to: Darbepoetin-α increases the blood volume flow in transplanted pancreatic islets in mice

2021 ◽  
Author(s):  
Maximilian M. Menger ◽  
Lisa Nalbach ◽  
Selina Wrublewsky ◽  
Matthias Glanemann ◽  
Yuan Gu ◽  
...  
Keyword(s):  
Pancreatic Islets ◽  
Blood Volume ◽  
Volume Flow

Heterogeneity of gut capillary transit times and impaired gut oxygen extraction in endotoxemic pigs

1996 ◽  
Vol 81 (2) ◽  
pp. 895-904 ◽  
Author(s):  
M. F. Humer ◽  
P. T. Phang ◽  
B. P. Friesen ◽  
M. F. Allard ◽  
C. M. Goddard ◽  
...  
Keyword(s):  
Blood Volume ◽  
Transit Time ◽  
Volume Flow ◽  
Oxygen Extraction ◽  
Control Group ◽  
Total Blood Volume ◽  
Oxygen Extraction Ratio ◽  
Total Blood ◽  
Transit Times ◽  
Critical Oxygen

We tested the hypothesis that endotoxin increases the heterogeneity of gut capillary transit times and impairs oxygen extraction. The gut critical oxygen extraction ratio was determined by measuring multiple oxygen delivery-consumption points during progressive phlebotomy in eight control and eight endotoxin-infused anesthetized pigs. In multiple 1- to 2-g samples of small bowel, we measured blood volume (radiolabeled red blood cells) and flow (radiolabeled 15-microns microspheres) before and after critical oxygen extraction. Red blood cell transit time (= volume/flow) multiplied by morphologically determined capillary/total blood volume gave capillary transit time. During hemorrhage, capillary/total blood volume did not change in the endotoxin group (0.5 +/- 4.5%) but increased in the control group (17.6 +/- 2.5%; P < 0.05) due to a decrease in total gut blood volume. Flow decreased significantly in the endotoxin group (36 +/- 10%; P < 0.05) but not in the control group (12 +/- 10%). Capillary transit-time heterogeneity increased in the endotoxin group (12.3 +/- 4.9%) compared with the control group (-5.8 +/- 7.4%; P < 0.05), predicting a critical oxygen extraction ratio 0.14 lower in the endotoxin group than in the control group (K. R. Walley. J. Appl. Physiol. 81: 885–894, 1996). This matches the measured difference (endotoxin group, 0.60 +/- 0.04; control group, 0.74 +/- 0.03; P < 0.05). Increased heterogeneity of capillary transit times may be an important cause of impaired oxygen extraction.

scholarly journals Magnetic resonance imaging measurement of blood volume flow in peripheral arteries in healthy subjects

2003 ◽  
Vol 38 (5) ◽  
pp. 1060-1066 ◽  
Author(s):  
Willemijn M Klein ◽  
Lambertus W Bartels ◽  
Liesbeth Bax ◽  
Yolanda van der Graaf ◽  
Willem P.Th.M Mali
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Blood Volume ◽  
Healthy Subjects ◽  
Volume Flow ◽  
Peripheral Arteries ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Measurement

Three-Dimensional Sonographic Measurement of Blood Volume Flow in the Umbilical Cord

2012 ◽  
Vol 31 (12) ◽  
pp. 1927-1934 ◽  
Author(s):  
Stephen Z. Pinter ◽  
Jonathan M. Rubin ◽  
Oliver D. Kripfgans ◽  
Marjorie C. Treadwell ◽  
Vivian C. Romero ◽  
...  
Keyword(s):  
Blood Volume ◽  
Umbilical Cord ◽  
Three Dimensional ◽  
Volume Flow

Umbilical vein volume flow in monochorionic twin pairs at 11–14 weeks

2014 ◽  
Vol 42 (4) ◽  
Author(s):  
Maria Angelica Zoppi ◽  
Ambra Iuculano ◽  
Giovanni Monni
Keyword(s):  
Umbilical Vein ◽  
First Trimester ◽  
Volume Flow ◽  
Crown Rump Length ◽  
Normal Outcome ◽  
Group A ◽  
The Mean ◽  
The Difference ◽  
Group B ◽  
Group D

AbstractWe investigated the umbilical vein volume flow (UVVF) at 11–14 weeks in monochorionic-diamniotic (MCDA) twins, focusing on the occurrence of complications. We considered 87 MCDA pregnancies. We used “E-flow” to detect the umbilical vein and measured the mean velocities and diameters of veins, also calculating the UVVF. Pregnancies were divided into four groups: a (twin-to-twin transfusion, TTTS); b (selective intrauterine growth restriction, sIUGR); c (discordance of fluid, DF); and d (with “normal” outcome). The main outcome of the study was the assessment of the difference of UVVF between twin 1 and twin 2 (larger and smaller twin). In eight of eight pairs of group a and seven of seven pairs of group b, the UVVF of fetuses 1 were significantly different than fetuses 2 (P<0.05). The UVVFs of fetuses 2 of group a were significantly lower in respect to the UVVFs of fetuses 2 of group d (P<0.05). We provide evidence of an important difference in UVVF in pairs that successively developed TTTS or sIUGR. The smaller fetuses of group a (TTTS) showed a lower venous return than fetuses 2 of group d (normal). First-trimester UVVF is lower in fetuses with a smaller crown-rump length in twin pairs at risk of TTTS or IUGR.

Extrajugular pathways of human cerebral venous blood drainage assessed by duplex ultrasound

2003 ◽  
Vol 94 (5) ◽  
pp. 1802-1805 ◽  
Author(s):  
Stephan J. Schreiber ◽  
Frank Lürtzing ◽  
Rainer Götze ◽  
Florian Doepp ◽  
Randolf Klingebiel ◽  
...  
Keyword(s):  
Blood Volume ◽  
Venous Blood ◽  
Duplex Ultrasound ◽  
Venous Drainage ◽  
Volume Flow ◽  
Venous System ◽  
Jugular Veins ◽  
Ultrasound Studies ◽  
Cerebral Venous Drainage ◽  
Venous Blood Volume

Cerebral venous drainage in humans is thought to be ensured mainly via the internal jugular veins (IJVs). However, anatomic, angiographic, and ultrasound studies suggest that the vertebral venous system serves as an important alternative drainage route. We assessed venous blood volume flow in vertebral veins (VVs) and IJVs of 12 healthy volunteers using duplex ultrasound. Measurements were performed at rest and during a transient bilateral IJV and a circular neck compression. Total venous blood volume flow at rest was 766 ± 226 ml/min (IJVs: 720 ± 232, VVs: 47 ± 33 ml/min). During bilateral IJV compression, VV flow increased to 128 ± 64 ml/min. Circular neck compression, causing an additional deep cervical vein obstruction, led to a further rise in VV volume flow (186 ± 70 ml/min). As the observed flow increase did not compensate for IJV flow cessation, other parts of the vertebral venous system, like the intraspinal epidural veins and the deep cervical veins, have to be considered as additional alternative drainage pathways.

scholarly journals OP34.06: Umbilical vein volume flow measurement in monochorionic twins

2009 ◽  
Vol 34 (S1) ◽  
pp. 172-172
Author(s):  
J. Chung ◽  
M. Kim ◽  
N. M. Choi ◽  
S. Lee ◽  
M. H. Kim ◽  
...  
Keyword(s):  
Flow Measurement ◽  
Umbilical Vein ◽  
Volume Flow ◽  
Monochorionic Twins

A MODEL BASED EVALUATION OF BLOOD VOLUME FLOW IN SLIGHTLY CURVED ARTERIES USING ULTRASOUND

2008 ◽  
Vol 41 ◽  
pp. S391
Author(s):  
Carole Leguy ◽  
Marielle Bosboom ◽  
Arnold Hoeks ◽  
Frans van de Vosse
Keyword(s):  
Blood Volume ◽  
Volume Flow ◽  
Model Based
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