Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Capillarity in Fluid

Capillarity in Fluid

Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...

Rise of Liquid in a Capillary Tube

Rise of Liquid in a Capillary Tube

When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.

Capillary Beds

Capillary Beds

Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
Capillaries connect arterioles, small branches of arteries, to venules,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Assessment of Gallbladder Function in Patients with Type 2 Diabetes Using Three-Dimensional Ultrasound.

Experimental and clinical endocrinology & diabetes : official journal, German Society of Endocrinology [and] German Diabetes Association·2026

Same author

A 3D ovarian cancer metastasis model using a decellularised peritoneal matrix to study therapy response.

EBioMedicine·2026

Same author

Comparison of two- and three-dimensional ultrasound for volume estimation of the meal-stimulated gallbladder.

Journal of ultrasonography·2025

Same author

The accuracy of surface imaging in detecting secondary patient motion caused by pitch and roll corrections in pelvic radiotherapy.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)·2025

Same author

Diurnal variation of the distance between cranium and the third lumbar vertebra and its implications for craniospinal irradiation.

Physics and imaging in radiation oncology·2025

Same author

Dosimetric consequences of adapting the craniocaudal isocenter distance to daily patient position in craniospinal irradiation using volumetric modulated arc therapy.

Journal of applied clinical medical physics·2024

Same journal

Grain size evaluation in polycrystalline materials using the interference effect of bounded ultrasonic beams at the Rayleigh critical angle.

Ultrasonics·2026

Same journal

Ultrasonic characterization of functionally graded materials using a continuously graded model and spectral inversion.

Ultrasonics·2026

Same journal

Frequency-wavenumber domain inversion for arterial viscoelasticity.

Ultrasonics·2026

Same journal

Pressure- and frequency-dependent acoustic behavior of second-generation acoustic reporter genes-expressing bacteria for optimized ultrasound imaging.

Ultrasonics·2026

Same journal

Laser ultrasonic detection for strut defects in additively manufactured lattice structure using zero-group-velocity Lamb waves.

Ultrasonics·2026

Same journal

A hemispherical bubble induced by ultrasonic vibration observed by high-speed X-ray imaging.

Ultrasonics·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 18, 2026

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Published on: September 9, 2022

Microfoam formation in a capillary.

Spiros Kotopoulis¹, Michiel Postema

¹Emmy-Noether Group, Institute of Medical Engineering, Department of Electrical Engineering and Information Technology, Ruhr-Universität Bochum, D-44780 Bochum, Germany.

|October 31, 2009

Summary

This summary is machine-generated.

Ultrasound contrast agent microbubbles form clusters and microfoams in capillaries. These microfoams act as a single entity, allowing for precise manipulation using ultrasound for potential therapeutic applications.

More Related Videos

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Published on: July 2, 2020

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Published on: February 22, 2016

Related Experiment Videos

Last Updated: Feb 18, 2026

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Published on: September 9, 2022

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Published on: July 2, 2020

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Published on: February 22, 2016

Area of Science:

Acoustic physics
Biomedical engineering
Fluid dynamics

Background:

Ultrasound contrast agents (UCAs) are microbubbles used in medical imaging.
The behavior of UCAs under ultrasound, particularly their aggregation, is crucial for therapeutic applications.
Controlling UCA behavior can enable targeted interventions, such as vessel occlusion.

Purpose of the Study:

To analyze the formation of ultrasound contrast agent clusters in capillaries.
To investigate the behavior of these clusters under continued sonication.
To demonstrate the potential for sonic manipulation of microfoam for therapeutic purposes.

Main Methods:

Utilized continuous driving frequencies in the 1-10 MHz range.
Employed high-speed camera footage to observe microbubble clustering phenomena.
Analyzed the role of primary and secondary radiation forces in cluster formation and movement.

Main Results:

Microbubbles collided to form clusters due to secondary radiation forces.
Clusters coalesced into microfoams within a quarter ultrasonic wavelength, driven by primary radiation forces.
Microfoams translated with the ultrasound field and moved towards the capillary wall, behaving as a single entity.

Conclusions:

Ultrasound contrast agent microbubbles aggregate into microfoams under specific sonication conditions.
These microfoams can be precisely positioned and manipulated using ultrasound, acting as a unified structure.
This controlled aggregation and manipulation of microfoams offer potential for targeted therapeutic interventions, like vessel occlusion.