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Related Concept Videos

Anatomy of Blood Vessels01:20

Anatomy of Blood Vessels

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The vascular system, an integral part of the circulatory system, comprises various blood vessels that play crucial roles in maintaining the body's homeostasis. These blood vessels form a complex and efficient circulatory network. The three primary categories of blood vessels are the arteries, veins, and capillaries.
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Structure of Blood Vessels01:15

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Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...
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Development of Blood Vessels01:07

Development of Blood Vessels

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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.
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Overview of Blood Vessels01:14

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The human cardiovascular system comprises five primary types of blood vessels: arteries, arterioles, veins, venules, and capillaries, each serving unique functions.
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What are Estimates?01:06

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It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 
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Blood Studies I: ABG and VBG01:26

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Blood studies are critical in the medical field, enabling healthcare professionals to assess a patient's health status accurately. This page will focus on two significant blood studies: Arterial Blood Gas (ABG) and Venous Blood Gas (VBG).
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Related Experiment Video

Updated: Feb 10, 2026

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Blood vessel detection, localization and estimation using a smart laparoscopic grasper: a Monte Carlo study.

Amal Chaturvedi1, Shetha A Shukair1, Paul Le Rolland1

  • 1Briteseed, 4660 N. Ravenswood Ave Chicago, IL 60640, USA.

Biomedical Optics Express
|May 16, 2018
PubMed
Summary

New laparoscopic graspers use near-infrared light to visualize embedded blood vessels, improving minimally invasive surgery (MIS) for complex procedures. This technology enhances surgeon visibility, potentially reducing conversions to open surgery and operating times.

Keywords:
(110.0110) Imaging systems(110.3080) Infrared imaging

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Area of Science:

  • Surgical Technology
  • Biomedical Engineering
  • Medical Imaging

Background:

  • Minimally invasive surgery (MIS) offers patient benefits but faces challenges in complex procedures due to limited visibility of vital structures like blood vessels.
  • Complicating factors such as inflammation, obesity, and scar tissue exacerbate these challenges, often leading to conversion to open surgery and increased operating times.
  • Current imaging techniques struggle to detect embedded blood vessels, hindering the wider adoption of MIS in specialties like colorectal and thoracic surgery.

Purpose of the Study:

  • To develop and validate a novel imaging technology for laparoscopic graspers to enhance visualization of embedded blood vessels.
  • To improve the safety and efficiency of minimally invasive surgery by providing surgeons with real-time identification of critical vascular structures.
  • To drive greater adoption of minimally invasive approaches in complex surgical procedures by overcoming current visualization limitations.

Main Methods:

  • Integration of near-infrared (NIR) LEDs and a linear image sensor onto the opposing jaws of laparoscopic graspers.
  • Utilizing Monte Carlo simulations to model the detection capabilities of the NIR system for embedded blood vessels.
  • Developing and testing a handheld prototype grasper in ex vivo experiments to validate simulation results.

Main Results:

  • Monte Carlo simulations predicted the detection of blood vessels (2-6 mm diameter) buried up to 1 cm beneath tissue.
  • Ex vivo experiments with the smart grasper prototype demonstrated accurate localization and size estimation of blood vessels.
  • Experimental results showed a strong correlation between estimated and actual blood vessel sizes, validating the simulation predictions.

Conclusions:

  • The developed NIR-based laparoscopic grasper technology effectively detects embedded blood vessels, even those not visible with current methods.
  • This technology has the potential to significantly reduce conversion rates from MIS to open surgery and decrease operative times in complex procedures.
  • Incorporation into existing laparoscopic tools can enhance surgeon capabilities, promoting broader application of minimally invasive techniques in challenging surgical fields.