ductus venosus


Also found in: Encyclopedia, Wikipedia.

ductus

 [duk´tus] (pl. duc´tus) (L.)
ductus arterio´sus a fetal blood vessel that joins the aorta and pulmonary artery.
ductus de´ferens the excretory duct of the testis, which joins the excretory duct of the seminal vesicle to form the ejaculatory duct; called also vas deferens.
patent ductus arteriosus see patent ductus arteriosus.
ductus veno´sus a major blood channel that develops through the embryonic liver from the left umbilical vein to the inferior vena cava.

duc·tus ve·no·sus

in the fetus, continuation of the left umbilical vein through the liver to the vena cava inferior; after birth, its lumen becomes obliterated, forming the ligamentum venosum.

ductus venosus

the vascular channel in the fetus passing through the liver and joining the umbilical vein with the inferior vena cava. Before birth it carries highly oxygenated blood from the placenta to the fetal circulation. It closes shortly after birth as pulmonary circulation is established and as the vessels in the umbilical cord collapse and become occluded. See also ductus arteriosus, foramen ovale.

duc·tus ve·no·sus

(dŭk'tŭs vē-nō'sŭs)
In the fetus, continuation of the left umbilical vein through the liver to the inferior vena cava; after birth, its lumen is obliterated, forming the ligamentum venosum.

ductus

pl. ductus [L.] duct.

ductus arteriosus
a fetal blood vessel that joins the aorta and pulmonary artery. Abnormal persistence of an open lumen after birth results in a patent ductus arteriosus. Called also persistent or patent ductus arteriosus.
ductus choledochus
ductus deferens
the excretory duct of the testis, which in horses and ruminants joins the excretory duct of the seminal vesicle to form the ejaculatory duct; called also vas deferens.
ductus epididymis
the duct which, in combination with connective tissue and muscle, forms the head, body and tail of the epididymis and continues as the ductus deferens.
ductus epoophori longitudinales
ductus reuniens
the joining channel between the cochlea and sacculus of the membranous labyrinth of the inner ear.
ductus venosus
a major blood channel that develops through the embryonic liver from the left umbilical vein to the caudal vena cava and closes within a few days after birth. If it remains patent, a congenital portacaval anastamosis is created.
References in periodicals archive ?
Screening for chromosomal abnormalities at 10-14 weeks: The role of the ductus venosus blood flow.
The blood returning to the fetus through the umbilical vein mostly passes through the ductus venosus and therefore only a small amount goes to the liver.
Doppler screening of the ductus venosus and MCA has its most useful role early in pregnancy.
5%, could be achieved by offering the cfDNA test to about 36%, 21%, and 11% of cases identified by first-line screening using the combined test alone, using the combined test with the addition of serum placental growth factor and alpha-fetoprotein, and using the combined test with the addition of placental growth factor, alpha-fetoprotein, and ductus venosus pulsatility index for veins, respectively," they said.
Preferential streaming of the ductus venosus and inferior caval vein towards the right heart is associated with left heart underdevelopment in human fetuses with left-sided diaphragmatic hernia.
First-trimester ductus venosus velocimetry in relation to nuchal translucency thickness and fetal karyotype.
Nicolaides's program of doing ductus venosus and tricuspid valve in very expert hands can have the improvements that he has just shown," he said after Dr.
first a downward course Umbilical vein catheter Inferior vena cava above liver Direct course up via left portal and ductus venosus Long venous line Away from renal veins Central venous line Superior vena cava Nasogastric tube Left hypochondrium / stomach or Nasojejunal tube jejunum respectively Intercostal / mediastinal drain Intrathoracic / mediastinal Type Undesirable position External Cutaneous [O.
After delivery, three important circulatory pathways, the ductus venosus, the foramen ovale, and the ductus arteriosus, are closed, which leads to an increase in pulmonary blood flow in response to lung expansion.
Partial nodular transformation of liver in an adult with persistent ductus venosus.
Together with subcostal study, it was demonstrated, an anomalous vertical venous vessel running in the midline, across the diaphragm, and connecting with the portal vein, and draining into inferior vena cava via the ductus venosus (Fig.
The prospective, multicenter observational study evaluated umbilical artery, ductus venosus and umbilical vein Doppler flows, and biophysical parameters as predictors of stillbirth, acidemia (cord artery pH less than 7.