May 18, 2016 anatomy of hepatic portal vein slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The main portal vein 1 then courses superiorly, giving off the right anterior portal vein and a small, ascending umbilical portion of the left portal vein 4. Choose from 500 different sets of portal vein flashcards on quizlet. The portal vein usually measures approximately 8 cm in length in adults. Sonographic evaluation of the portal and hepatic systems. There are several variants affecting the pv, and quite a number of congenital and acquired pathologies. The superior and inferior mesenteric veins join the splenic vein behind the pancreas to form the portal vein which carries blood to the liver, which in turn is drained by the hepatic veins which pass into the ivc. While there may be some variations between individuals, the hepatic portal vein is usually formed by the convergence of the. The elements of afferent pedicle of the liver have a segmental distribution to the liver parenchyma. The hilus is also the site where efferent bile ducts as well as lymphatics and nerves exit the liver.
The principal tributaries to the portal vein are the lienal vein, with blood from the stomach, the greater omentum a curtain of membrane. Divergence part of the hepatic portal vein is the main element of intraparenchymatous spatial. Components of hepatectomy left rhv mhv lhv right outflow hepatic veins vena cava inflow hepatic artery portal vein parenchyma. The left hepatic vein divides the left liver into medial and lateral segments. Portal vein, large vein through which oxygendepleted blood from the stomach, the intestines, the spleen, the gallbladder, and the pancreas flows to the liver. The portal vein divides the liver into the upper and lower segments fig. Mar 21, 2018 portal vein thrombosis is a pathological condition concerning the liver in which the portal vein which carries blood from the intestines to the liver gets blocked or thrombosed as a result of a clot. Coronal left and axial right diagrams show that the. Ake andrnsandberg and ingemar ihse abstract the purpose of this study was to evaluate the appearance of the normal portal vein with intravascular ultrasound. The vein, which drains the lesser curvature of the stomach, empties directly into the hepatic portal vein. The most suitable portal vein anatomy for right lobe living donor liver transplantation is the presence of conventional mpv branching, in which the right anterior portal vein rapv and right posterior portal vein rppv originate from the right portal vein rpv. Mar 21, 2019 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. Generally, the hepatic portal vein is about 8 centimeters 3 inches long in adults, and is located in the upper right quadrant of the abdomen, which originates behind the neck of the pancreas and is part of the hepatic portal system.
The liver consumes about 20% of total body oxygen when at rest, so the total liver blood flow is quite high. Portal vein definition is a vein that collects blood from one part of the body and distributes it in another through capillaries. Portal vein thrombosis pvt is a blood clot that causes irregular blood flow to the liver. The inferior mesenteric vein drains into the splenic vein to the left of the portal splenic confluence. Know the causes, symptoms, treatment and diagnosis of portal vein thrombosis. Read more harshmohan pathology ebook download free in pdf format. Chapter 4 skin, superficial fascia, and deep fascia of the neck.
What is portal vein thrombosiscausessymptomstreatment. Anatomy portal and hepatic system the portal vein is formed by the junction of the splenic and superior mesenteric vein. Study of surgical anatomy of portal vein of liver segments by. 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 hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. Standard anatomy 6580% main portal vein trifurcation into right anterior, right posterior and left portal vein 79%. Oct 24, 2017 portal vein thrombosis pvt is a blood clot of the portal vein, also known as the hepatic portal vein. Portal venous anatomy the standard portal venous anatomy consists of the main portal trunk branching into the right and left portal veins, with the right portal vein subsequently dividing into anterior and posterior branches. Ad, ct portograms show standard portal vein anatomy.
Jul 21, 2015 it is a major component of the hepatic portal system, one of only two portal venous systems in the body with the hypophyseal portal system being the other. Approximately 75% of total liver blood flow is through the portal vein, with the remainder coming from the hepatic artery proper. This vein allows blood to flow from the intestines to the liver. 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. The hepatic is official, and is used to distinguish it from the concept of a portal vein in general. This blood contains nutrients and toxins extracted from digested contents. It can occur concomitantly with mesenteric and or splenic vein thrombosis. May 27, 2019 portal vein plural portal veins a short, wide vein located in the abdominal cavity formed by the union of the superior mesenteric and splenic veins that channels blood from the gastrointestinal tract and spleen to capillary beds in the liver. Portal hypertension may be caused by intrinsic liver disease, obstruction, or structural changes that result in increased portal venous flow or increased hepatic resistance.
Generally, the hepatic portal vein is about 8 centimeters 3 inches long in adults, and is located in the upper right quadrant of the abdomen, which originates behind the neck of the pancreas and is part of the hepatic portal system formation. The portal vein in all specimens originated by confluence of the cranial and caudal mesenteric veins. Approximately 75% of total liver blood flow is through the portal vein, with the remainder coming from the hepatic. Portal vein hypoplasia pvh is a congenital disorder, in which microscopic intrahepatic shunts are present, causing blood to bypass the liver sinusoids. Incidence, patterns, and clinical relevance of variant portal. The portal vein or hepatic portal vein is a blood vessel that carries blood from the gastrointestinal tract, gallbladder, pancreas and spleen to the liver. Variations of portal vein are frequent and they account for 20%35% of the population.
Prevalence and epidemiology prevalence of portal vein thrombosis pvt ranges from 0. Vishram singh anatomy free pdf download medicforyou. Learn portal vein with free interactive flashcards. Portal venous system an overview sciencedirect topics. The gross anatomy of the portal vein of 21 dogs was studied by venous portography, corrosion casting, and gross dissection. I realised that the portal venous system information does not match for the hepatic portal vein page and the hypopgysea portal system. Trace the flow of a drop of blood from the small intestine to the right atrium of the heart, noting all structures encountered. Pdf the anatomy of the umbilical, portal and hepatic. The anatomy of the umbilical, portal and hepatic venous systems in the human fetus at 1419 weeks of gestation.
Intravascular ultrasound of the portal vein normal anatomy. Main portal vein divides into left portal vein arrow, a and right portal vein, which subsequently divides into right anterior portal vein arrow, c to supply segments v and viii, and right posterior portal vein arrow, d to supply segments vi and vii. Portal vein definition of portal vein by medical dictionary. The normal anatomy of the portal vein is defined as a division of the main portal vein into two branchesthe left supplying segments ii, iii, and iv and right portal veins. Portal hypertension is a term used to describe elevated pressures in the portal venous system a major vein that leads to the liver.
Learn about the symptoms and treatment of this condition. Blood flow to the liver is unique in that it receives both oxygenated and partially deoxygenated blood. Microscopic anatomy vasculature, biliary system, innervation vasculature both the hepatic portal vein and the hepatic artery, together with afferent nerves, enter the liver at the hilus. Prevalence and types of main and right portal vein branching. If you continue browsing the site, you agree to the use of cookies on this website. The hepatic portal vein is formed by the union of the, which drains the,, and the, which drains the and. As the clinical presentation and the laboratory findings are similar to those in dogs with an extrahepatic portosystemic shunt. It is a major component of the hepatic portal system, one of only two portal venous systems in the body with the hypophyseal portal system. Parry department of clinical sciences and services, the royal veterinary college, university of london, north mymms, herts al9 7ta.
Portal vein anomaly associated with malposition of the gallbladder. Portal vein definition of portal vein by the free dictionary. Portal vein definition of portal vein by merriamwebster. Congenital and acquired anomalies of the portal venous system.
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