Ductus venosus

Ductus venosus
Fetal circulation. The ductus venosus (red) connects the umbilical vein to the inferior vena cava.
The liver and the veins in connection with it, of a human embryo, twenty-four or twenty-five days old, as seen from the ventral surface.
Details
SourceUmbilical vein
Drains toInferior vena cava
ArteryDuctus arteriosus
Identifiers
Latinductus venosus
Anatomical terminology

In the fetus, the ductus venosus (Arantius' duct after Julius Caesar Aranzi[1]) shunts a portion of umbilical vein blood flow directly to the inferior vena cava.[2] Thus, it allows oxygenated blood from the placenta to bypass the liver. Compared to the 50% shunting of umbilical blood through the ductus venosus found in animal experiments, the degree of shunting in the human fetus under physiological conditions is considerably less, 30% at 20 weeks, which decreases to 18% at 32 weeks, suggesting a higher priority of the fetal liver than previously realized.[3] In conjunction with the other fetal shunts, the foramen ovale and ductus arteriosus, it plays a critical role in preferentially shunting oxygenated blood to the fetal brain. It is a part of fetal circulation.

  1. ^ "Whonamedit - dictionary of medical eponyms". www.whonamedit.com.
  2. ^ Kiserud, T.; Rasmussen, S.; Skulstad, S. (2000). "Blood flow and the degree of shunting through the ductus venosus in the human fetus". American Journal of Obstetrics and Gynecology. 182 (1 Pt 1): 147–153. doi:10.1016/S0002-9378(00)70504-7. PMID 10649170.
  3. ^ Kiserud, T (2000). "Fetal venous circulation -- an update on hemodynamics". J Perinat Med. 28 (2): 90–6. doi:10.1515/JPM.2000.011. PMID 10875092. S2CID 11799576.