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Pulse rhythm01:30

Pulse rhythm

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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.
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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
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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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Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
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Updated: Jun 15, 2025

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EmRad: Ubiquitous Vital Sign Sensing Using Compact Continuous-Wave Radars.

Nils C Albrecht1, Dominik Langer1, Daniel Krauss2

  • 1Institute of High-Frequency TechnologyTechnische Universität Hamburg 21073 Hamburg Germany.

IEEE Open Journal of Engineering in Medicine and Biology
|August 26, 2024
PubMed
Summary
This summary is machine-generated.

The EmRad system uses continuous-wave (CW) radar for contactless vital sign monitoring, offering a non-intrusive alternative to traditional methods. This technology enables accurate heart rate and respiratory rate detection without patient contact.

Keywords:
Biomedical monitoringdoppler radarmachine learning

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Area of Science:

  • Biomedical Engineering
  • Signal Processing
  • Radar Technology

Background:

  • Non-intrusive, continuous vital sign monitoring is essential but challenging.
  • Traditional methods like ECG and PPG require direct patient contact, limiting long-term use.
  • Existing methods face limitations in unobtrusive, long-term biomedical monitoring applications.

Purpose of the Study:

  • Introduce the EmRad system for contactless vital sign detection.
  • Demonstrate the system's capabilities in heart rate and respiratory rate monitoring.
  • Highlight EmRad's potential to overcome limitations of traditional vital sign monitoring techniques.

Main Methods:

  • Utilized continuous-wave (CW) radar technology for contactless vital sign detection.
  • Developed advanced signal processing strategies for precise vital sign extraction.
  • Implemented motion artifact reduction techniques to ensure data accuracy.

Main Results:

  • EmRad system successfully detects vital signs, including heart rate and respiratory rate, contactlessly.
  • The system emphasizes miniaturization, performance, and scalability for diverse applications.
  • Demonstrated ability to generate large-scale datasets across various environmental conditions.

Conclusions:

  • The EmRad system offers a promising contactless solution for vital sign monitoring.
  • Its design facilitates precise vital sign extraction through sophisticated signal processing.
  • Case studies showcase EmRad's versatility and potential to revolutionize research and clinical monitoring.