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Related Concept Videos

Blood Flow01:29

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Overview of Blood Vessels01:14

Overview of Blood Vessels

The human cardiovascular system comprises five primary types of blood vessels: arteries, arterioles, veins, venules, and capillaries, each serving unique functions.
Arteries and Arterioles: Arteries are muscular and elastic vessels that primarily carry oxygenated blood from the heart to body tissues, except for the pulmonary artery, which carries deoxygenated blood. They have thick walls to withstand high pressure and contain a layer of muscle tissue, allowing them to expand or contract as...
Structure of Blood Vessels01:15

Structure of Blood Vessels

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...
Anatomy of Blood Vessels01:20

Anatomy of Blood Vessels

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.
Arteries
Arteries circulate oxygenated blood from the heart, except the pulmonary artery, which transports deoxygenated blood to the lungs. Large arteries, such as the aorta, have...

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Related Experiment Video

Updated: Jun 20, 2026

Endothelialized Microfluidics for Studying Microvascular Interactions in Hematologic Diseases
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[Viewing Endovascular Devices at the Microscale].

Satoru Takahashi1, Kazutaka Sumita

  • 1Department of Endovascular Surgery, Institute of Science Tokyo.

No Shinkei Geka. Neurological Surgery
|February 17, 2026
PubMed
Summary

Advanced neuroendovascular devices like microcatheters and flow diverters were visualized using scanning electron microscopy. This provides new insights into their microscale architecture for improved clinical application.

Area of Science:

  • Neurosurgery
  • Medical Devices
  • Materials Science

Background:

  • Neuroendovascular therapy has advanced significantly, relying on sophisticated devices for minimally invasive treatments.
  • Current understanding of these devices is limited by traditional visualization methods.
  • Accurate knowledge of device microarchitecture is crucial for optimal clinical outcomes.

Purpose of the Study:

  • To present direct observations of neuroendovascular devices using scanning electron microscopy (SEM).
  • To provide insights into the microscale architecture of key neuroendovascular devices.
  • To re-evaluate device characteristics from a microscopic perspective to clarify clinical significance.

Main Methods:

  • Direct visualization of neuroendovascular devices (microcatheters, microwires, coils, flow diverters) using scanning electron microscopy.

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  • Analysis of microscale structural details not apparent with conventional methods.

    • Main Results:

    • Detailed microscale architecture of various neuroendovascular devices was revealed through SEM.
    • SEM imaging provided a novel perspective on the structural intricacies of these small medical devices.
    • Observations offered insights into how microscale features may influence device performance.

    Conclusions:

    • Scanning electron microscopy offers a powerful tool for understanding neuroendovascular device architecture.
    • Microscopic insights can enhance the selection and application of devices in neuroendovascular practice.
    • This approach may lead to improved clinical outcomes through better device utilization.