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Related Concept Videos

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

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

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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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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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Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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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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Pulse01:16

Pulse

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When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
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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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Related Experiment Video

Updated: Aug 31, 2025

Ultrasound-based Pulse Wave Velocity Evaluation in Mice
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Relationship between Brachial-Ankle Pulse Wave Velocity and Fundus Arteriolar Area Calculated Using a Deep-Learning

Kanae Fukutsu1, Michiyuki Saito1, Kousuke Noda1,2

  • 1Department of Ophthalmology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.

Current Eye Research
|August 24, 2022
PubMed
Summary

Retinal vascular measurements correlate with arterial stiffness. Total arteriolar and venular areas (AA, VA) measured by deep learning show promise as biomarkers for systemic arterial stiffness.

Keywords:
Arteriosclerosisdeep learning systemimagingpulse wave velocityretinal arteriolar narrowing

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Last Updated: Aug 31, 2025

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Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness
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Area of Science:

  • Ophthalmology
  • Cardiology
  • Biomedical Engineering

Background:

  • Retinal vessels reflect systemic conditions like hypertension and arteriosclerosis.
  • Previous work established a deep-learning algorithm for retinal vascular area in fundus photographs (VAFP).
  • Arterial stiffness is a key indicator of cardiovascular health, commonly assessed by brachial-ankle pulse wave velocity (baPWV).

Purpose of the Study:

  • To investigate the relationship between VAFP and baPWV.
  • To determine if VAFP can serve as a non-invasive biomarker for arterial stiffness.

Main Methods:

  • Utilized retinal photographs from 372 individuals undergoing regular health checkups.
  • Applied a deep-learning algorithm to measure total arteriolar area (AA) and total venular area (VA).
  • Assessed correlations between AA, VA, and measured baPWV, alongside other clinical variables.

Main Results:

  • Both AA and VA showed significant negative correlations with baPWV (R = -0.40 and R = -0.36, respectively).
  • A regression model incorporating AA, sex, age, and systolic blood pressure accurately estimated baPWV (R = 0.70).
  • Estimated baPWV using AA demonstrated a stronger correlation with measured baPWV than models without AA.

Conclusions:

  • Retinal arteriolar and venular areas are significantly correlated with systemic arterial stiffness (baPWV).
  • VAFP, specifically AA, shows potential as a reliable, non-invasive biomarker for assessing arterial stiffness.
  • This deep-learning-based VAFP measurement offers a promising alternative for evaluating cardiovascular risk.