2024年8月21日 · Using antenatal ultrasound, an intra-abdominal UVV may be seen as a cyst-like structure in the fetal upper abdomen with venous flow within on color Doppler interrogation. The term umbilical varix is defined when the caliber is greater than 9 mm or with a ratio of more than 50% between the dilated and a more distal normal intra-abdominal portion ...

2020年1月20日 · The umbilical vein is the conduit for blood returning from the placenta to the fetus until it involutes soon after birth. The umbilical vein arises from multiple tributaries within the placenta and enters the umbilical cord, along with the (usually) paired umbilical arteries.

2024年8月21日 · Ultrasound. It is usually detected in the 2 nd to 3 rd trimester. Assessment is usually made in the axial plane and color Doppler is often required. An intrahepatic persistent right umbilical vein may be seen as an umbilical vein abnormally connected to the right portal vein and the fetal gallbladder is positioned medial to the PRUV.

2020年5月30日 · Umbilical venous flow in the physiological situation comprises of a monophasic non-pulsatile flow pattern in the umbilical vein with a mean velocity of 10-15 cm/s. Since a normal umbilical vein supplies a continuous forward flow of oxygenated blood to the fetal heart, the presence of pulsatility implies a pathological state unless in the ...

2020年9月8日 · Umbilical cord thrombosis is a potentially fatal complication and can mean either a thrombosis of the umbilical vein or either or both the umbilical arteries. Umbilical vein thrombosis occurs more frequently than thrombosis of one or both umbilical arteries (umbilical arterial thrombosis) 8.

2023年12月9日 · Umbilical venous catheters (UVCs) are commonly used in neonates for vascular access and should be carefully assessed for position on all neonatal films.

2024年12月2日 · Raised portal venous pressures Portal hypertension is defined as a hepatic venous pressure gradient (HVPG) >5 mmHg, which is a surrogate for the portosystemic pressure gradient. Clinically significant portal hypertension is defined as a gradient >10 mmHg, and variceal bleeding may occur at a gradient >12 mmHg.

2018年8月27日 · Umbilical venous dilatation is a rare entity and often tends to occur as an isolated finding 4. Dilatation of the umbilical vein can arise from a number of pathologies: umbilical venous varix (UVV): particularly if focal

A prominent recanalized paraumbilical vein runs inferiorly from the portal vein to the umbilicus. It continues within the rectus sheath inferiorly toward the pelvis where it joins the right external iliac vein .

2023年4月21日 · Fetal ductus venosus flow assessment can be useful in a number of situations in fetal ultrasound: first-trimester screening for aneuploidic anomalies. second and third-trimester scanning when there are concerns regarding. intrauterine growth restriction (IUGR) fetal …