Continuous Determination of Umbilical Artery Flow Parameters during Fetal Bradycardia Using Computerized Analysis of Doppler Wave Forms

1994 ◽  
Vol 9 (3) ◽  
pp. 186-195
Author(s):  
O. Tadmor ◽  
M. Nitzan ◽  
R. Rabinowitz ◽  
A. Chizhevsky ◽  
Y. Skomorovsky ◽  
...  
Keyword(s):  
Umbilical Artery ◽  
Fetal Bradycardia ◽  
Computerized Analysis ◽  
Flow Parameters ◽  
Wave Forms ◽  
Artery Flow ◽  
Continuous Determination

Analysis of Umbilical Artery Flow Parameters during Fetal Variable Decelerations Using Computerized Doppler Waveforms

1999 ◽  
Vol 14 (1) ◽  
pp. 2-10 ◽  
Author(s):  
O. Tadmor ◽  
Y. Bocker ◽  
R. Rabinowitz ◽  
Y. Aboulafia ◽  
S. Yagel ◽  
...  
Keyword(s):  
Umbilical Artery ◽  
Flow Parameters ◽  
Artery Flow

Assessment of umbilical artery flow and fetal heart rate to predict delivery time in bitches

2016 ◽  
Vol 86 (7) ◽  
pp. 1654-1661 ◽  
Author(s):  
Amália Turner Giannico ◽  
Daniela Aparecida Ayres Garcia ◽  
Elaine Mayumi Ueno Gil ◽  
Marlos Gonçalves Sousa ◽  
Tilde Rodrigues Froes
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Delivery Time ◽  
Artery Flow

scholarly journals Doppler ultrasound in pregnancy – quality requirements of DEGUM and clinical application (part 2)

2021 ◽  
Author(s):  
Renaldo Faber ◽  
Kai-Sven Heling ◽  
Horst Steiner ◽  
Ulrich Gembruch
Keyword(s):  
Blood Flow ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Umbilical Artery ◽  
Prophylactic Treatment ◽  
Doppler Sonography ◽  
First Trimester ◽  
Ductus Venosus ◽  
Fetal Diagnosis

AbstractThis second part on Doppler sonography in prenatal medicine and obstetrics reviews its clinical applications. While this has not become the initially anticipated screening tool, it is used for the diagnosis and surveillance of a variety of fetal pathologies. For example, the sonography-based determination of uterine artery blood flow indices is an important parameter for the first trimester multimodal preeclampsia risk assessment, increasing accuracy and providing indication for the prophylactic treatment with aspirin. It also has significant implications for the diagnosis and surveillance of growth-restricted fetuses in the second and third trimesters through Doppler-sonographic analysis of umbilical artery, middle cerebral artery and ductus venosus. Here, especially the hemodynamics of the ductus venosus provides a critical criterium for birth management of severe, early-onset FGR before 34 + 0 weeks of gestation. Further, determination of maximum blood flow velocity of the middle cerebral artery is a central parameter in fetal diagnosis of anemia which has been significantly improved by this analysis. However, it is important to note that the mentioned improvements can only be achieved through highest methodological quality. Importantly, all these analyses are also applied to twins and higher order multiples. Here, for the differential diagnosis of specific complications such as TTTS, TAPS and TRAP, the application of Doppler sonography has become indispensable. To conclude, the successful application of Doppler sonography requires both exact methodology and precise pathophysiological interpretation of the data.

Continuous Determination of Various Enzymes and Sodium Concentration in Urine

1978 ◽  
Vol 4 (5) ◽  
pp. 334-337 ◽  
Author(s):  
G. Horpacsy ◽  
J. Zinsmeyer ◽  
M. Mebel
Keyword(s):  
Sodium Concentration ◽  
Continuous Determination

Continuous determination of the volume of a space in a non steady state condition

1974 ◽  
Vol 36 (1) ◽  
pp. 59-66
Author(s):  
Oscar A. Gómez-Poviña ◽  
Carmen Sainz de Calatroni ◽  
Susana Orden de Puhl ◽  
Mariano J. Guerrero
Keyword(s):  
Steady State ◽  
State Condition ◽  
Steady State Condition ◽  
Continuous Determination

Determination of Discharge Coefficient for Ball Valves With Calibrated Inserts

2004 ◽  
Author(s):  
Gino James Rouss ◽  
William S. Janna
Keyword(s):  
Discharge Coefficient ◽  
Polynomial Equation ◽  
The Body ◽  
Orifice Diameter ◽  
Flow Parameters ◽  
Dimensionless Groups ◽  
Order Polynomial ◽  
Experimental Process ◽  
Power Law Equation

The valve coefficient was measured for 1, 1-1/4, 1-1/2 and 2 nominal ball valves. A recently designed orifice insert was used with these valves to obtain smaller valve coefficients. Orifice inserts were threaded into the body of a ball valve just upstream of the ball itself. The valve coefficient was measured for every insert used with these valves, and an expression was determined to relate the orifice diameter to other pertinent flow parameters. Two dimensionless groups were chosen to correlate the collected data, and expressions were developed that can be used as aids in sizing the orifice insert needed to obtain the desired valve coefficient. The study has shown that a 2nd order polynomial equation as well as a power law equation can both be used to predict the desired results. Knowing pipe size and schedule, the diameter of the orifice insert needed to obtain the required valve coefficient can be approximated with minimum error. An error analysis performed on the collected data shows that the results are highly accurate, and that the experimental process is repeatable.

Incidence and Management of Umbilical Artery Flow Abnormalities during Open Fetal Surgery

2017 ◽  
Vol 43 (4) ◽  
pp. 274-283 ◽  
Author(s):  
Jina L. Sinskey ◽  
Mark D. Rollins ◽  
Elizabeth Whitlock ◽  
Anita J. Moon-Grady ◽  
Lan Vu ◽  
...  
Keyword(s):  
Umbilical Artery ◽  
Fetal Surgery ◽  
Artery Flow
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