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Related Concept Videos

Hepatic Portal System01:21

Hepatic Portal System

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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.
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Veins01:17

Veins

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Veins are an integral part of our circulatory system, serving as the blood vessels that transport blood from all body regions to the heart. They are a network of hollow tubes that carry blood low in oxygen from the body's cells back to the heart for reoxygenation. Veins are crucial for maintaining the body's overall fluid balance and the continuous circulation of blood.
Structure of Veins:
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Veins of Thorax01:19

Veins of Thorax

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The azygos system is a crucial part of the body's circulatory system and drains most of the thorax. It comprises the azygos, hemiazygos, and accessory hemiazygos veins.
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The...
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Veins of Lower Limbs01:15

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The human body consists of an intricate network of veins responsible for the crucial task of blood drainage from the lower limbs. These veins can be categorized into two main types: deep veins and superficial veins.
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Veins as Blood Reservoirs01:10

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Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance...
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Overview of Systemic Veins01:11

Overview of Systemic Veins

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Systemic veins are crucial blood vessels that return deoxygenated blood from various body tissues back to the heart. There are three systemic veins that return deoxygenated blood to the heart, they are as follows.
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Updated: Feb 6, 2026

Ex Vivo Hepatic Perfusion Through the Portal Vein in Mouse
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Ex Vivo Hepatic Perfusion Through the Portal Vein in Mouse

Published on: March 9, 2022

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EUS-guided portal vein sampling.

Christopher G Chapman1, Irving Waxman1

  • 1Center for Endoscopic Research and Therapeutics, The University of Chicago Medicine and Biological Sciences, Chicago, IL 60637, USA.

Endoscopic Ultrasound
|August 18, 2018
PubMed
Summary
This summary is machine-generated.

Endoscopic ultrasound (EUS) enables visualization of the gastrointestinal tract and vasculature. EUS-guided portal vein sampling is a safe and effective method for diagnosing gastrointestinal cancers.

Keywords:
EUSFNAportal vein

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Area of Science:

  • Gastroenterology
  • Interventional Endoscopy
  • Vascular Access

Background:

  • Endoscopic ultrasound (EUS) offers real-time imaging of the gastrointestinal tract and adjacent structures.
  • The portal vein's proximity to the bowel makes it a valuable landmark for anatomical identification and malignancy staging.
  • EUS-guided vascular access of the portal vein is increasingly reported for diagnostic and therapeutic interventions.

Purpose of the Study:

  • To review the rationale and technical aspects of EUS-guided portal vein sampling for gastrointestinal cancer diagnosis.
  • To highlight the utility of EUS in visualizing and accessing the portal vein.

Main Methods:

  • Review of pilot and feasibility studies on EUS-guided portal vein access in human patients.
  • Discussion of technical considerations for performing EUS-guided portal vein sampling.

Main Results:

  • EUS-guided portal vein access has been utilized for circulating tumor cell enumeration and portal pressure gradient monitoring.
  • Pilot studies suggest EUS-guided portal vein sampling is safe and effective.

Conclusions:

  • Understanding the technical aspects of EUS-guided portal vein sampling is crucial for standardization.
  • Further development in vascular access technologies and safety profiles is anticipated.