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

scholarly journals OP20.03: Reliability of the fetal umbilical vein volume flow measurement between different operators

2008 ◽  
Vol 32 (3) ◽  
pp. 379-379
Author(s):  
J. Carrillo ◽  
M. Yamamoto ◽  
H. Muñoz ◽  
D. Pedraza ◽  
J. Valdivia ◽  
...  
Keyword(s):  
Flow Measurement ◽  
Umbilical Vein ◽  
Volume Flow

Volume flow measurement in hemodialysis shunts using time-domain correlation.

1999 ◽  
Vol 18 (3) ◽  
pp. 177-183 ◽  
Author(s):  
F Basseau ◽  
N Grenier ◽  
H Trillaud ◽  
C Douws ◽  
A Saint-Amon ◽  
...  
Keyword(s):  
Time Domain ◽  
Flow Measurement ◽  
Volume Flow ◽  
Time Domain Correlation

Volume flow measurement using Doppler RF decorrelation

2000 ◽  
Vol 108 (5) ◽  
pp. 2519-2519
Author(s):  
Theresa A. Tuthill ◽  
J. Brian Fowlkes ◽  
Jonathan M. Rubin ◽  
Anne L. Hall
Keyword(s):  
Flow Measurement ◽  
Volume Flow

Development and characterization of a volume flow measurement system for low-pressure gases

Measurement ◽  
2020 ◽  
Vol 166 ◽  
pp. 108230
Author(s):  
Bortolino Saggin ◽  
Diego Scaccabarozzi ◽  
Arash Valiesfahani ◽  
Pietro Valnegri ◽  
Marianna Magni ◽  
...  
Keyword(s):  
Measurement System ◽  
Flow Measurement ◽  
Low Pressure ◽  
Volume Flow

scholarly journals Calibration-Free Volume Flow Measurement Principle Based on Thermal Time-of-Flight (TToF)

2011 ◽  
Vol 25 ◽  
pp. 765-768 ◽  
Author(s):  
E. Engelien ◽  
O. Ecin ◽  
R. Viga ◽  
B.J. Hosticka ◽  
A. Grabmaier
Keyword(s):  
Free Volume ◽  
Flow Measurement ◽  
Time Of Flight ◽  
Volume Flow ◽  
Thermal Time ◽  
Measurement Principle ◽  
Calibration Free

Spatial Angle-Corrected Fetal Volume Flow Measurement (SAFM)

2011 ◽  
Vol 37 (8) ◽  
pp. S29-S30
Author(s):  
T.M. Scholbach ◽  
J. Stolle ◽  
J. Scholbach
Keyword(s):  
Flow Measurement ◽  
Volume Flow

Volume flow measurement using doppler and grey-scale decorrelation

2001 ◽  
Vol 27 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Jonathan M. Rubin ◽  
Theresa A. Tuthill ◽  
J.Brian Fowlkes
Keyword(s):  
Flow Measurement ◽  
Volume Flow ◽  
Grey Scale

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.

scholarly journals Investigation on the Nonconstant Behavior of a Vortex Flow Meter with Narrow Gauge Pipe via Conducting Measurements and Numerical Simulations

1970 ◽  
Vol 61 (3) ◽  
pp. 247
Author(s):  
Bence Fenyvesi ◽  
Csaba Horváth
Keyword(s):  
Numerical Simulations ◽  
Cross Sections ◽  
Flow Measurement ◽  
Vortex Flow ◽  
Volume Flow Rate ◽  
Volume Flow ◽  
Diagnostic Investigation ◽  
Number Range ◽  
Wide Range ◽  
The Given

Vortex shedding flowmeters can be used for a wide range of flow measurement applications with various kinds of fluids. The critical point in applying this method comes from the assumption that the Strouhal number is constant for the given Reynolds number range. In some cases – typically regarding flowmeters with narrow gauge pipes –, this assumption is only partially met, thus limiting the widespread use of these instruments in certain industrial appliances. The paper presents a diagnostic investigation on the effects of this nonconstant behavior. The method elaborated in this report can be applied to vortex flowmeters with narrow gauge pipes. In these instruments – usually due to the narrow cross-sections of the gauge pipe – measurement possibilities are limited, thus it is not possible for the user to determine the effects of the nonconstant behavior. To conduct these investigations, a calibration rig was designed and assembled. The presented diagnostic method combines measurements and numerical simulations. The results of the investigations can be used in the data processing phase, in order to reduce the uncertainty of the volume flow rate measured by vortex flowmeters.

The smart-orifice meter: a mini head meter for volume flow measurement

1999 ◽  
Vol 10 (2) ◽  
pp. 109-115 ◽  
Author(s):  
H Krassow ◽  
F Campabadal ◽  
E Lora-Tamayo
Keyword(s):  
Flow Measurement ◽  
Volume Flow
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