Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Measurement of Blood Pressure01:17

Measurement of Blood Pressure

3.6K
Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
3.6K
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

2.7K
To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
2.7K
Blood Flow01:29

Blood Flow

77.1K
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.
77.1K
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

3.8K
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...
3.8K
Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

1.2K
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
1.2K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.6K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
6.6K

You might also read

Related Articles

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

Sort by
Same author

DICER1-mutated renal neoplasia: A series of 5 cases demonstrating the spectrum of cystic nephroma, Wilms tumor, and anaplastic sarcoma.

Human pathology·2026
Same author

Object detection as an aid for locating the prostate in surface-based abdominal ultrasound images.

Communications engineering·2025
Same author

Prostate Targeting: Compact Robot With Harmonic Stepper Motors for MRI-Guided Needle Therapy.

IEEE transactions on bio-medical engineering·2025
Same author

Automating prostate volume acquisition using abdominal ultrasound scans for prostate-specific antigen density calculations.

Scientific reports·2025
Same author

Extraneuraxial pancreatic hemangioblastoma in a patient with tuberous sclerosis.

Japanese journal of clinical oncology·2024
Same author

Understanding heterogeneous mechanisms of heart failure with preserved ejection fraction through cardiorenal mathematical modeling.

PLoS computational biology·2023

Related Experiment Video

Updated: Feb 27, 2026

Meso-Scale Particle Image Velocimetry Studies of Neurovascular Flows In Vitro
08:00

Meso-Scale Particle Image Velocimetry Studies of Neurovascular Flows In Vitro

Published on: December 3, 2018

8.9K

Magnetohydrodynamic Voltage Recorder for Comparing Peripheral Blood Flow.

Kevin J Wu1, T Stan Gregory1, Michael C Lastinger1

  • 1College of Engineering, The University of Georgia, 597 D.W. Brooks Drive, Athens, GA, USA.

Annals of Biomedical Engineering
|June 24, 2017
PubMed
Summary

Researchers developed a portable device using the magnetohydrodynamic (MHD) effect to measure blood flow. This innovation offers a more accessible and comfortable alternative to current cardiovascular monitoring methods.

Keywords:
Blood flowECGElectrocardiographyMHD effectSmartphone

More Related Videos

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
07:53

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

Published on: April 25, 2013

17.8K
A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
07:20

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

8.9K

Related Experiment Videos

Last Updated: Feb 27, 2026

Meso-Scale Particle Image Velocimetry Studies of Neurovascular Flows In Vitro
08:00

Meso-Scale Particle Image Velocimetry Studies of Neurovascular Flows In Vitro

Published on: December 3, 2018

8.9K
Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
07:53

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

Published on: April 25, 2013

17.8K
A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
07:20

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

8.9K

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Physiology
  • Medical Devices

Background:

  • Current blood flow measurement methods for cardiovascular diseases are often costly or uncomfortable.
  • The magnetohydrodynamic (MHD) effect, interaction between magnetic fields and blood flow, generates observable voltages (VMHD) during MRI, correlating with blood flow.
  • Intra-MRI electrocardiography (ECG) can detect VMHD, linking MRI blood flow measurements to ECG signals.

Purpose of the Study:

  • To demonstrate the reproducibility of VMHD measurements outside of an MRI environment.
  • To develop and validate a portable device for blood flow monitoring utilizing the MHD effect.
  • To assess the feasibility of using VMHD as a metric for cardiovascular health and blood flow dynamics.

Main Methods:

  • Recreated the MRI's magnetic field interaction using a 0.4T neodymium magnet and electrodes to induce VMHD in a single-lead ECG measurement.
  • Extracted and integrated VMHD signals to derive a stroke volume metric.
  • Developed a smartphone-enabled portable device for VMHD recording and analysis.

Main Results:

  • The portable device achieved less than 6% error compared to a commercial blood flow recorder.
  • VMHD was successfully recorded using the portable 0.4T magnet setup.
  • Exercise stress testing revealed a 23% increase in VMHD in healthy subjects and an 81% increase in athletes, indicating physiological responsiveness.

Conclusions:

  • The study successfully demonstrates the reproducibility of VMHD outside of an MRI.
  • A novel, accessible, and portable device for blood flow monitoring based on the MHD effect has been developed.
  • The findings suggest that VMHD is a viable metric for assessing blood flow and cardiovascular function, with potential for widespread clinical application.