QS Study

Ligamentum Venosum

The remnant of ductus venosus is called ligamentum venosum. It is a fibrous remnant which travels superiorly from the porta hepatis of the liver to the inferior vena cava. It is a cord of tissue connected to the liver that is the vestige of the ductus venosus It is often obliterated in adults.

Formation

When the umbilical cord is ligated the ductus venosus contracts, due to the sudden reduction of blood flow. Subsequently, the lumen is close-down & lastly it is presented as the ligamentum venosum. It is invested by the peritoneal folds of the lesser omentum within a fissure on the visceral/posterior surface of the liver between the caudate and main parts of the left lobe.

Fig: Ligamentum Venosum

Functions

In foetal period ductus venosus connects the left umbilical vein to inferior vena cava. And bring about circulation (in adults it is functionless). In the fetus, it is patent and known as the ductus venosus which shunts blood returning from the placenta in the umbilical vein to the inferior vena cava thus bypassing the liver.

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