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Related Concept Videos

Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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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:
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Sites for measruring blood pressure01:21

Sites for measruring blood pressure

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Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
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Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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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...
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Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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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...
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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.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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Overview of Blood Vessels01:14

Overview of Blood Vessels

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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.
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...
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Related Experiment Video

Updated: Jan 14, 2026

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

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VasoTracker 2: Open-source software and hardware for tracking blood vessel diameter and assessing vascular function.

Matthew D Lee1, Christopher Osborne2,3, Ross Stevenson1

  • 1Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK.

The Journal of Physiology
|October 19, 2025
PubMed
Summary

VasoTracker 2 offers open-source software and low-cost hardware for precise blood vessel diameter measurement, advancing vascular physiology research accessibility. This platform supports diverse imaging and myography applications, benefiting researchers globally.

Keywords:
blood vessel diameterendotheliumopen sourcesmooth musclevasoconstrictionvasodilatation

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Area of Science:

  • Vascular Biology and Physiology
  • Biomedical Engineering
  • Open-Source Scientific Tools

Background:

  • Commercial vascular imaging systems are often prohibitively expensive, limiting access to advanced research tools.
  • There is a need for accessible, cost-effective platforms for detailed blood vessel diameter measurement and vascular function analysis.
  • Existing tools may lack the versatility to handle diverse imaging modalities and experimental conditions in vascular research.

Purpose of the Study:

  • To introduce VasoTracker 2, an integrated open-source platform for blood vessel diameter measurement and vascular physiology research.
  • To provide researchers with affordable alternatives to expensive commercial systems for studying vascular reactivity and endothelial function.
  • To enable multipoint diameter tracking across various imaging techniques and facilitate standardized pressure myography experiments.

Main Methods:

  • Development of automated, multipoint diameter tracking software utilizing advanced edge detection algorithms.
  • Integration of software with support for brightfield microscopy, fluorescence imaging, and ultrasound recordings.
  • Design of modular, low-cost open-source pressure myograph hardware, including a confocal-compatible vessel chamber and the VasoMoto programmable pressure controller.

Main Results:

  • VasoTracker 2 software enables precise diameter analysis in branched vessels across multiple imaging modalities.
  • Automated pressure protocols facilitate standardized myogenic tone experiments with both real-time and offline data analysis.
  • The VasoMoto pressure controller and vessel chamber allow for the construction of a functional pressure myograph system at significantly reduced cost.

Conclusions:

  • VasoTracker 2 democratizes advanced vascular research by providing free, open-source software and low-cost hardware.
  • The platform's flexibility and cost-effectiveness enhance accessibility for researchers worldwide studying vascular dynamics.
  • The open-source nature encourages modification and extension, fostering innovation in vascular physiology research.