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Ultrasound-based Pulse Wave Velocity Evaluation in Mice
Published on: February 14, 2017
Pulse morphology visualization and analysis with applications in cardiovascular pressure signals
Tim Ellis1, James McNames, Mateo Aboy
1Biomedical Signal Processing Laboratory, Electrical and Computer Engineering Department, Portland State University, 1900 SW 4th Ave., Portland, OR 97201, USA. taellis@pdx.edu
IEEE Transactions on Bio-Medical Engineering
|September 18, 2007
Summary
This study introduces a novel method to analyze pulse wave morphology in pressure signals, revealing clinical insights previously hidden in complex data. The technique aids in understanding relationships between pulse shape and vital metrics like heart rate.
Area of Science:
- Biomedical Engineering
- Physiological Signal Analysis
- Medical Data Visualization
Background:
- Pulse morphology in pressure signals contains valuable clinical information.
- Analyzing this morphology in the time domain is challenging without specialized tools.
- Existing methods lack effective ways to correlate pulse shape with physiological metrics.
Purpose of the Study:
- To develop and present a new analysis and visualization method for studying pulse morphology.
- To explore the functional relationship between pulse morphology and time/signal metrics.
- To demonstrate the clinical utility of the method through real-world data analysis.
Main Methods:
- Utilizes established signal processing techniques.
- Incorporates nonparametric regression for trend analysis.
- Employs an automatic beat detection algorithm for precise analysis.
- Integrates novel visualization tools for intuitive interpretation.
Main Results:
- Successfully analyzed intracranial pressure (ICP) signals from traumatic brain injury (TBI) patients.
- Identified a clear transition point in pulse morphology from three peaks (low pressure) to a single peak (high pressure).
- Demonstrated distinct relationships between pulse morphology and signal metrics across different patients.
Conclusions:
- The developed method effectively visualizes and analyzes complex pulse morphology.
- Provides novel insights into pressure signal dynamics, particularly in TBI.
- Offers a valuable tool for understanding physiological states and patient-specific variations.
Related Concept Videos
01:17Pulse amplitude and quality
Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
01:16Pulse
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 indicator...
The pulse serves as a clinical indicator...
01:30Equipments Used To Measure Blood Pressure
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...
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...
01:19Assessing 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:
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
01:13Special considerations while measuring pulse
Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
01:30Pulse rhythm
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...