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Related Concept Videos

Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

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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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Sites for measruring blood pressure01:21

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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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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.
Prepare for the Procedure:
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Equipments Used To Measure Blood Pressure01:30

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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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Measurement of Blood Pressure01:17

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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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Pre-Procedural Guidelines for Assessing Blood Pressure01:10

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Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the...
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Related Experiment Video

Updated: Jul 16, 2025

Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness
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Estimating Blood Pressure during Exercise with a Cuffless Sphygmomanometer.

Kenta Hayashi1, Yuka Maeda1, Takumi Yoshimura2

  • 1Institute of Systems and Information Engineering, University of Tsukuba, Tsukuba 305-8577, Japan.

Sensors (Basel, Switzerland)
|September 9, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a cuffless blood pressure (BP) monitoring method using machine learning and photoplethysmogram (PPG) signals. The novel approach achieves accuracy comparable to traditional cuff-based devices, even during exercise.

Keywords:
bidirectional LSTMblood pressure (BP)exercisefeature extractionlong short-term memory (LSTM)photoplethysmogram (PPG)skewness signal quality index (SSQI)

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Area of Science:

  • Biomedical Engineering
  • Physiological Monitoring
  • Machine Learning in Healthcare

Background:

  • Accurate blood pressure (BP) measurement is vital for health, typically using cuff-based devices.
  • Existing cuffless BP monitors face challenges in accuracy and long-term reliability.
  • Machine learning offers potential for improving cuffless BP estimation from physiological signals.

Purpose of the Study:

  • To develop and validate a cuffless method for estimating blood pressure (BP) during physical activity.
  • To leverage machine learning and photoplethysmogram (PPG) signals for accurate, non-invasive BP monitoring.
  • To assess the performance of the proposed method against regulatory standards for BP measurement devices.

Main Methods:

  • Utilized photoplethysmogram (PPG) signals for blood pressure (BP) estimation.
  • Applied signal quality indices (skewness) and feature selection algorithms (RReliefF) for reliable signal processing.
  • Employed a long short-term memory (LSTM) neural network for BP prediction.
  • Conducted experiments with 17 participants during rest, exercise, and recovery phases.

Main Results:

  • The proposed cuffless method achieved a mean error of 0.32 ± 7.76 mmHg in BP estimation.
  • The accuracy of the developed method meets the standards required for cuff-based sphygmomanometers.
  • Demonstrated reliable BP estimation during a 20-minute exercise protocol.

Conclusions:

  • The developed LSTM-based, cuffless BP monitoring system provides accurate measurements comparable to traditional methods.
  • This technology has the potential to significantly improve patient comfort and healthcare outcomes.
  • The proposed approach is suitable for diverse monitoring settings, including clinical, home, and sports environments.