What does the portal venous system drain?
The portal vein (PV) is the main vessel of the portal venous system (PVS), which drains the blood from the gastrointestinal tract, gallbladder, pancreas, and spleen to the liver.
What veins drain into the portal vein?
The portal vein is usually formed by the confluence of the superior mesenteric, splenic veins, inferior mesenteric, left, right gastric veins and the pancreatic vein….
| Portal vein | |
|---|---|
| Drains from | Gastrointestinal tract, spleen, pancreas |
| Source | splenic vein, superior mesenteric vein, inferior mesenteric vein, pancreatic vein |
What does portal venous mean?
Definition of portal vein : a vein that collects blood from one part of the body and distributes it in another through capillaries especially : a vein carrying blood from the digestive organs and spleen to the liver.
What organs does the portal venous circulation drain?
The portal vein receives drainage from the gallbladder, spleen, pancreas, stomach, and small and large intestines. The portal vein forms from the confluence of the superior and inferior mesenteric veins, the splenic vein, gastric vein, and cystic vein.
Where does the portal system drain?
The portal venous system drains the intestines, pancreas, and spleen with numerous collateral anastomoses to other venous beds of the abdomen. The portal vein delivers approximately 70% of the hepatic blood flow.
What is a portal in medical terms?
Vein, portal: A large vein that carries blood from the stomach and the intestines to the liver. The portal vein is formed by the union of the splenic and superior mesenteric veins. It conveys venous blood to the liver for detoxification before the blood is returned to the circulation via the hepatic veins.
How do you treat a blood clot in the portal vein?
Medication. For acute PVT, doctors commonly recommend medication as thrombolytic treatment. These prescription drugs can dissolve blood clots. For gradual clot growth, patients may be prescribed anticoagulant drugs — blood thinners such as heparin — to help prevent recurrent clots and any excess growth.
What is the venous outflow from the eye?
Venous outflow from the eye is primarily via the vortex veins and the central retinal vein, which merge with the superior and inferior ophthalmic veins that drain into the cavernous sinus, the pterygoid venous plexus and the facial vein (Fig 2.2, right).
What is the vascular supply and drainage of the eye?
Vascular supply and drainage. The arterial input to the eye is provided by several branches from the ophthalmic artery, which is derived from the internal carotid artery in most mammals (Fig 2.2, left). These branches include the central retinal artery, the short and long posterior ciliary arteries, and the anterior ciliary arteries.
Where does the central retinal vein drain into?
The central retinal vein runs through the optic nerve. From here it drains into the cavernous sinus or superior ophthalmic vein. The superior ophthalmic vein is usually the largest and is the principal vein. It is formed when the supraorbital and angular veins unite just behind the trochlea (pulley like structure).
What is the anatomy of the ophthalmic veins?
The anatomy of the ophthalmic veins is significant as these veins connect the anterior facial vein with the cavernous sinus. Given that the cavernous sinus also communicates with the veins of the base of the brain, this chain opens a pathway for the spreading of facial infections which can be fatal if not treated.