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Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

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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Related Experiment Video

Updated: Jun 29, 2026

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care

Published on: May 10, 2024

Hemodynamic sensing using subcutaneous photoplethysmography.

Robert G Turcott¹, Todd J Pavek

¹St. Jude Medical, Sylmar, CA, USA. turcott@stanford.edu

American Journal of Physiology. Heart and Circulatory Physiology

|October 14, 2008

Summary

This summary is machine-generated.

Photoplethysmography (PPG) can be used subcutaneously to monitor hemodynamic changes. This light-based method shows promise as a reliable, noninvasive sensor for implantable devices, potentially improving patient management.

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Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research

Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research

Published on: June 8, 2022

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Last Updated: Jun 29, 2026

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care

Published on: May 10, 2024

Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research

Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research

Published on: June 8, 2022

Area of Science:

Biomedical Engineering
Cardiovascular Physiology
Medical Device Technology

Background:

Implantable pacemakers and defibrillators lack hemodynamic monitoring capabilities.
Hemodynamic data is crucial for optimizing device therapy, disease management, and patient monitoring.
Photoplethysmography (PPG) is a potential noninvasive method for sensing blood volume changes.

Purpose of the Study:

To evaluate the efficacy of subcutaneous photoplethysmography (PPG) for hemodynamic sensing.
To determine if PPG-derived blood volume changes correlate with arterial pressure.
To assess the concordance of optimal pacing intervals identified by PPG and arterial pressure.

Main Methods:

Simultaneous recording of aortic pressure and PPG signals in 10 anesthetized dogs.
Induction of hemodynamic changes via alterations in atrioventricular (AV) delay and rapid pacing.
Regression analysis to assess the proportionality between PPG waveforms and arterial pressure changes.

Main Results:

PPG signals demonstrated a directly proportional relationship with transient changes in arterial pressure.
High correlation coefficients (0.95 and 0.72) were observed for rapid pacing and AV delay protocols, respectively.
Optimal AV delays determined by PPG and aortic pressure measurements were concordant.

Conclusions:

Subcutaneous PPG is a viable method for detecting hemodynamic variations.
PPG can serve as a surrogate for acute arterial pressure monitoring in implantable devices.
This technology holds potential for enhanced device function and patient management.