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Related Concept Videos

Portal Hypertension01:22

Portal Hypertension

Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
Hepatic Portal System01:21

Hepatic Portal System

The hepatic portal system, a critical part of our circulatory framework, transports nutrient-laden, deoxygenated blood from the gastrointestinal tract and spleen to the liver. This ingenious system plays an indispensable role in maintaining our body's metabolic equilibrium.
At its core, the hepatic portal vein is the result of a confluence of the superior and inferior mesenteric veins along with the splenic vein. Each of these veins has a unique role. The superior mesenteric vein is responsible...
Fetal Circulation01:14

Fetal Circulation

Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
Development of Blood Vessels01:07

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
Esophageal Varices-I: Introduction01:24

Esophageal Varices-I: Introduction

Esophageal varices are dilated, tortuous veins which are found mainly in the submucosa of the lower esophagus but which may also appear higher up or extend into the stomach. They develop due to increased pressure in the portal venous system, often as a result of liver cirrhosis. This condition scars and damages the liver, impeding normal blood flow through the portal vein. To compensate, blood seeks alternative pathways, forming fragile new vessels (varices) in the esophagus and stomach. These...

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Related Experiment Video

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A Patient-Derived Xenograft Model for Venous Malformation
06:51

A Patient-Derived Xenograft Model for Venous Malformation

Published on: June 15, 2020

Congenital portosystemic vascular malformations.

Florent Guérin1, Thomas Blanc, Frédéric Gauthier

  • 1Department of Pediatric Surgery, Bicêtre Hospital, Paris, France. florent.guerin-chir@bct.aphp.fr

Seminars in Pediatric Surgery
|July 18, 2012
PubMed
Summary
This summary is machine-generated.

Congenital portosystemic shunts are rare liver vascular malformations diverting blood from the liver. This review covers their symptoms, treatments like surgery or transplantation, and future research directions.

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Area of Science:

  • Vascular Surgery
  • Pediatric Surgery
  • Hepatology

Background:

  • Congenital portosystemic shunts (CPSS) are abnormal connections between the portal and systemic veins.
  • These developmental anomalies occur during early gestation (4-8 weeks), often associated with cardiac defects.
  • CPSS are classified as end-to-side (Type I) or side-to-side (Type II).

Purpose of the Study:

  • To review the clinical presentation and complications of CPSS.
  • To discuss current therapeutic strategies, including surgical and endovascular interventions.
  • To explore the role of liver transplantation and identify future research avenues.

Main Methods:

  • Literature review focusing on congenital portosystemic shunts.
  • Analysis of clinical manifestations, diagnostic approaches, and treatment outcomes.
  • Synthesis of information on surgical, endovascular, and transplant management.

Main Results:

  • CPSS present with diverse symptoms and potential serious complications.
  • Both surgical and endovascular techniques offer viable treatment options.
  • Liver transplantation is reserved for complex or refractory cases.

Conclusions:

  • Understanding CPSS pathophysiology is crucial for timely diagnosis and management.
  • Multidisciplinary approaches are essential for optimizing patient outcomes.
  • Further research is needed to refine treatment strategies and address current controversies.