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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

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Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
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Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
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Guidelines For Measuring Vital Signs01:19

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Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
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Assessment of Diffusion and Perfusion01:17

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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
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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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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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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.
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Related Experiment Video

Updated: Mar 6, 2026

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

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Blood perfusion display based on video pulse wave.

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |March 9, 2017
    PubMed
    Summary

    A new system uses video to monitor blood circulation and pulse wave velocity (PWV). While easy to use, facial PWV measurements were lower than standard values, possibly due to vessel differences.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Medical Imaging

    Background:

    • Assessing blood circulation and pulse wave velocity (PWV) is crucial for monitoring health.
    • Current methods for PWV measurement can be invasive or require specialized equipment.
    • Non-invasive, accessible methods for continuous cardiovascular monitoring are needed.

    Purpose of the Study:

    • To develop an easy system for monitoring dynamic blood perfusion and PWV using video image processing.
    • To assess the potential of this system for daily health management and public health screening.

    Main Methods:

    • Development of a system to process video images of the human body.
    • Monitoring dynamic blood perfusion patterns.
    • Calculating pulse wave velocity (PWV) from video data.

    Main Results:

    • The developed system can easily evaluate PWV.
    • PWV values obtained from facial video images were approximately 1/10 of standard values derived from larger vessels.
    • A significant difference was observed between PWV measurements from facial video and standard methods.

    Conclusions:

    • The developed video-based system offers a potentially easy method for assessing blood circulation and PWV.
    • Discrepancies in PWV measurements may stem from the differing characteristics of superficial facial vessels (arterioles) compared to larger, deeper vessels.
    • Further research is needed to refine the system and understand the physiological basis for observed differences in PWV measurements.