Portal vene

Den (hepatiske) portalvenen samler det venøse blod fra mavemusklerne og bringer det til leveren. Læs mere om vena portae i leveren!

Portal vene

Den (lever)portal vene Samler det venøse, iltfattige blod fra fordøjelseskanalerne og bringer det til leveren. Der metaboliseres næringsstoffer absorberet i fordøjelseskanalen fra mad, stoffer og toksiner. Her vil du lære alt vigtigt om portalenen!

Produktoversigt

portal vene

  • Hvad er portåven?

  • Indsamlingssted for blod fra maven

  • Portalen cirkulation

  • Klager omkring portalvenen

Hvad er portåven?

Strengt taget er der to portal venerne (portal vein) i det menneskelige legeme: portårevenen (portal vene i leveren) og hypophyseal portal systemet (portal vene hypophysiales). Den kortvarige portalåre refererer normalt til leveren. Det tæller til venerne og bringer lavt ilt blod fra maven til leveren. Dens længde er omkring seks inches, og den ligger vandret lige bag bukspyttkjertlen.

Læs også

  • AV-knuden
  • aorta
  • aortaklappen
  • arterie
  • blodkar
  • blodbanen
  • hjerte
  • hjerteklap
  • koronararterie
  • hjerteslag

Indsamlingssted for blod fra maven

Leverens portalveje stammer fra forening af miltåre og øvre tarmveje. I sin bane, andre vener fra ulige målestok abdominal og bækken organer åbne en: venstre og højre Magenvene, pyloric vene (vene pylorus), galdeblære vene lavere intestinal vene (strømmer først ind i milt vene) såvel som vener fra bugvæggen omkring navlen.

Portalen vene i leveren indsamler blod fra disse vener og fører det til leveren: Som en central stofskifteorgan denne proces de næringsstoffer fra de fødevarer, der er blevet absorberet i blodet i fordøjelseskanalen. Omdannede stoffer og toksiner samt nedbrydningsprodukter fra milten metaboliseres i leveren.

Portåren forekommer ved hepatisk portal i leveren - en position ved bunden af ​​organet åbner ved bl.a. den hepatiske arterie. Inden i leveren splittes vena portae i to hovedafdelinger og derefter til stadig mere fine grene. Den medrevne iltfattigt, næringsrige blod blandes i kapillærerne i leveren (leversinusoider) til iltet blod, som indfører de fine grene af den hepatiske arterie. Således forbinder to kapillærnet med hinanden via portalvenen: fordøjelseskanalenes og leverets.

Hvad har hjertesvigt og vægte at gøre med hinanden? Se her, hvordan hjertesvigt udvikler sig, hvordan det genkendes, og hvad dets konsekvenser er.

Portalen cirkulation

Alt vigtigt ved dette sekundære kredsløb af den store blodcirkulation, du læser i artikelportalcirkulationen.

Klager omkring portalvenen

Når portal hypertension (portal hypertension) er trykket i portåren til stadighed ligger over 12 mmHg forøget (normalt er det tre til seks mmHg). Årsagen er en hindring for strømmen, i eller bag leveren. Eksempler på prehepatic blok (flow hindring foran leveren), portalen venetrombose, og tumorer (såsom fra pancreas, mave, tarm), som hindrer strømningen. En intrahepatisk blok (flow hindring i lever) kan anvendes på levercirrose, er kronisk leverbetændelse (hepatitis) og hepatiske tumorer baseret. Kronisk pericarditis og en utæt trikuspidalklap (hjerteklap mellem højre atrium og højre ventrikel af hjertet) kan medføre som posthepatic blok (flow forhindring bag leveren) til portal hypertension.

Andre sundhedsmæssige problemer i området portal vene er for eksempel skader, misdannelser og godartede og ondartede neoplasmer.
Portal vene

FAQ - 💬

❓ What is portal vein and its function?

👉 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 can cause portal vein thrombosis?

👉 The underlying causes of portal vein thrombosis (PVT) are frequently multifactorial and include malignancies, progressive chronic liver diseases, processes localized to the epigastrium and hepatobiliary system, and acquired as well as inherited thrombophilia.

❓ What are the 3 portal systems in the body?

👉 Examples of such systems include the hepatic portal system, the hypophyseal portal system, and (in non-mammals) the renal portal system.

❓ Can you survive portal vein thrombosis?

👉 In acute non-cirrhotic portal vein thrombosis with an early diagnosis with improved diagnostic techniques and use of early anticoagulation, the 5-year survival rate has now improved to 85%. The outcome of PVT is good, and mortality primarily is due to an underlying cause or as consequences of portal hypertension.

❓ What happens if portal vein is blocked?

👉 Portal vein thrombosis is blockage or narrowing of the portal vein (the blood vessel that brings blood to the liver from the intestines) by a blood clot. Most people have no symptoms, but in some people, fluid accumulates in the abdomen, the spleen enlarges, and/or severe bleeding occurs in the esophagus.

❓ What is normal size of portal vein?

👉 The normal portal vein diameter (PVD) can vary normally between 7 to 15 mm while normal portal venous pressure lies between 5 and 10 mmHg (14 cm of H2O) (12).

❓ What is the treatment for portal vein thrombosis?

👉 Most patients with PVT are treated with immediate anticoagulation therapy. [1,4] This is most often performed through continuous intravenous heparin infusion, but some authors report using low-molecular-weight heparin. Chronic treatment options include warfarin or low-molecular-weight heparin.

❓ How long can you live with portal vein thrombosis?

👉 Mortality/Morbidity The variceal size is the major predictive factor for bleeding. In adults with portal vein thrombosis, the 10-year survival rate has been reported to be 38-60%, with most of the deaths occurring secondary to the underlying disease (eg, cirrhosis, malignancy).

❓ Why is it called a portal system?

👉 "A portal system is an arrangement by which blood collected from one set of capillaries passes through a large vessel or vessels, to another set of capillaries before returning to the systemic circulation." This is a verbatim quote from Dorland's Illustrated Medical Dictionary.

❓ How many portal systems are there in humans?

👉 twocirculatory system Lower vertebrates have two so-called portal systems, areas of the venous system that begin in capillaries in tissues and join to form veins, which divide to produce another capillary network en route to the heart. They are called the hepatic (liver) and renal (kidneys) portal systems.

❓ How do you fix portal vein thrombosis?

👉 Most patients with PVT are treated with immediate anticoagulation therapy. [1,4] This is most often performed through continuous intravenous heparin infusion, but some authors report using low-molecular-weight heparin. Chronic treatment options include warfarin or low-molecular-weight heparin.

👉 The portal vein (PV) (sometimes referred to as the main or hepatic portal vein) is the main vessel in the portal venous system and drains blood from the gastrointestinal tract and spleen to the liver. The portal vein usually measures approximately 8 cm in length in adults with a maximum diameter of 13 mm.

👉 Portal vein. The portal vein is usually formed by the confluence of the superior mesenteric and splenic veins and also receives blood from the inferior mesenteric, left and right gastric veins, and cystic veins .

👉 Most veins in the body, called systemic veins, carry blood toward the heart. The portal vein and its contributing veins are different because they carry blood to the liver first. Collectively, these veins are called the hepatic portal venous system and are an important source of complications in patients with chronic liver disease.

👉 Portal Vein Thrombosis. Portal vein thrombosis (PVT) is a blood clot of the portal vein, also known as the hepatic portal vein. This vein allows blood to flow from the intestines to the liver. A PVT blocks this blood flow. Although PVT is treatable, it can be life-threatening.


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