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Related Concept Videos

Assessment of blood pressure in brachial artery(one-step method)01:15

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This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
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Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
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Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
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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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Related Experiment Video

Updated: Feb 6, 2026

Femoral Arterial and Venous Catheterization for Blood Sampling, Drug Administration and Conscious Blood Pressure and Heart Rate Measurements
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    This study introduces a new calibration-free method for cuffless blood pressure measurement using a bi-modal probe. The system accurately estimates carotid blood pressure, showing promise for hypertension screening.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Medical Devices

    Background:

    • Traditional blood pressure (BP) measurement relies on cuff-based devices, which can be cumbersome and provide only intermittent readings.
    • Cuffless BP monitoring offers a potential solution for continuous and convenient BP assessment.
    • Accurate estimation of central aortic pressure is crucial for cardiovascular risk assessment.

    Purpose of the Study:

    • To develop and validate a calibration-free method for cuffless blood pressure (BP) measurement from superficial arteries.
    • To create a prototype device capable of estimating carotid BP, an indicator of central aortic pressure.
    • To assess the accuracy and potential utility of the developed system for hypertension screening.

    Main Methods:

    • A bi-modal probe system integrating ultrasound and photoplethysmograph sensors was designed.
    • Mathematical models were used to relate arterial dimensions and pulse wave velocity (PWV) to BP parameters.
    • Carotid artery diameter and local PWV were measured to estimate BP without calibration.

    Main Results:

    • The prototype device successfully measured beat-by-beat arterial dimensions and local PWV in real-time.
    • Estimated carotid diastolic BP (DBP) had an absolute error <10 mmHg in 82% of cases (RMSE = 8.3 mmHg).
    • Receiver Operating Characteristic (ROC) analysis showed an area under the curve ≥0.8 for hypertension screening using carotid SBP and DBP.

    Conclusions:

    • A feasible calibration-free, cuffless BP measurement method with acceptable accuracy was demonstrated.
    • The developed system shows potential for local BP monitoring and hypertension screening.
    • The technology could also be utilized for evaluating local arterial stiffness indices.