scholarly journals P41.13: Doppler ultrasound measurements of uteroplacental blood flow in pregnancies complicated by placental malaria: preliminary report

2007 ◽  
Vol 30 (4) ◽  
pp. 609-609
Author(s):  
D. Starks ◽  
L. Bohinc ◽  
N. Lazebnik ◽  
C. King ◽  
A. Dent
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Preliminary Report ◽  
Placental Malaria ◽  
Ultrasound Measurements ◽  
Uteroplacental Blood Flow

Repeatability of Doppler ultrasound measurements of hindlimb blood flow in halothane anaesthetised horses

2010 ◽  
Vol 32 (3) ◽  
pp. 239-246 ◽  
Author(s):  
A. L. Raisis ◽  
L. E. Young ◽  
H. Meire ◽  
K. Walsh ◽  
P. M. Taylor ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Ultrasound Measurements

scholarly journals The accuracy of prenatal diagnosis of selective fetal growth restriction with second trimester Doppler ultrasound in monochorionic diamniotic twin pregnancies

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255897
Author(s):  
Yao Wang ◽  
Ai Zhang ◽  
Tineck Stock ◽  
Enrico Lopriore ◽  
Dick Oepkes ◽  
...  
Keyword(s):  
Blood Flow ◽  
Birth Weight ◽  
Prenatal Diagnosis ◽  
Pregnant Women ◽  
Doppler Ultrasound ◽  
Medical Center ◽  
Adverse Outcomes ◽  
Second Trimester ◽  
Ultrasound Measurements ◽  
Twin Pregnancies

Background Selective fetal restriction growth (sFGR) is one of the common diseases of monochorionic diamniotic (MCDA) twin pregnancies, resulting in many adverse outcomes. At present, second trimester ultrasonography is widely used in the prenatal diagnosis of sFGR, but the diagnostic effectiveness is still uncertain. The aim of this study is to assess the diagnostic accuracy of second trimester Doppler ultrasound measurements for sFGR. Methods A retrospective study included 280 pregnant women (118 with and 162 without sFGR) with MCDA pregnancies was conducted in the fetal medicine center from Leiden University Medical Center from January 2008 to December 2013. The women participating had already undergone an ultrasound examination in the second trimester. The postnatal criteria of sFGR was a single birth weight (BW) < 3 rd percentile in a twin, or birth weight discordance (BWD)≥25% between two twins, while the BW of the smaller twin < 10th percentile. Early prenatal diagnosis of sFGR was defined as a single EFW < 3 rd percentile in a twin, or at least 2 of the following 4 parameters must be met (fetal weight of one fetus < 10th percentile, AC of one fetus <10th percentile, EFW discordance≥25%, UA pulsatility index (PI) of the smaller fetus > 95th percentile). According to the diagnosis of sFGR after birth, we evaluate diagnostic effectiveness of Doppler ultrasound in the second trimester for sFGR. Results Of these 280 participants, the mean age was 32.06 ± 4.76 years. About 43.9% of pregnant women were primiparas. The ability of second trimester Doppler ultrasound to accurately diagnosed sFGR is 75.4%, missed diagnosis rate and the misdiagnosis rate were 24.6% and 10.5% respectively. The ROC curve indicated that the combination of AC discordance, EFW discordance, and small fetal UA blood flow was the best diagnostic indicator of sFGR in MCDA pregnancy with the AUC was 0.882 (95%CI, 0.839–0.926). Conclusions Second trimester Doppler and ultrasound measurements is an effective method for early prenatal diagnosis of sFGR. The combined indicator of AC discordance, EFW discordance, and the small fetal UA blood flow reaches highest diagnostic value.

scholarly journals The influence of temperature variation upon vascular dynamics in cattle as measured by Doppler-image ultrasonography

2007 ◽  
Vol 13 ◽  
pp. 391-393
Author(s):  
B.H. Kirch ◽  
G.E. Aiken ◽  
D.E. Spiers
Keyword(s):  
Blood Flow ◽  
Temperature Variation ◽  
Doppler Ultrasound ◽  
Vascular Changes ◽  
Flow Rates ◽  
Influence Of Temperature ◽  
Caudal Artery ◽  
Doppler Image ◽  
Ultrasound Measurements

Two studies were performed to determine if Doppler ultrasound can detect vascular changes in cattle exposed to hot and cold conditions. Three calves per study (320±38 kg) were acclimated to 17.5oC, and then exposed to 32oC and 8oC. Animals were maintained under these conditions for 24 h and then returned to the original thermoneutral level. Three replicated ultrasound measurements of the median caudal artery were performed. Scans were repeated at -2, 5, 23, 24 and 28 h. Blood flow rates of 32oC cattle ranged from 27.84 (-2 h) to 43.42 ml/min at 23 h (P

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