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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

1.2K
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.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

830
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.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
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Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

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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.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
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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.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

1.4K
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.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
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Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
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Related Experiment Video

Updated: Dec 23, 2025

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

Published on: May 10, 2024

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3D Camera and Pulse Oximeter for Respiratory Events Detection.

Carmina Coronel, Christoph Wiesmeyr, Heinrich Garn

    IEEE Journal of Biomedical and Health Informatics
    |April 24, 2020
    PubMed
    Summary
    This summary is machine-generated.

    A new 3D camera method accurately detects respiratory events using SpO2 and movement, offering reliable sleep apnea detection without uncomfortable sensors.

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    Last Updated: Dec 23, 2025

    Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
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    Quantitative Mapping of Specific Ventilation in the Human Lung using Proton Magnetic Resonance Imaging and Oxygen as a Contrast Agent
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    Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure
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    Area of Science:

    • Medical Devices
    • Sleep Medicine
    • Biomedical Engineering

    Background:

    • Traditional polysomnography (PSG) for sleep apnea detection relies on sensors that can be uncomfortable and prone to artifacts.
    • Accurate detection of respiratory events is crucial for diagnosing and managing sleep-related breathing disorders.

    Purpose of the Study:

    • To develop a respiratory movement signal from a 3D time-of-flight camera.
    • To evaluate the combination of this signal with SpO2 for detecting respiratory events comparable to PSG.

    Main Methods:

    • A novel algorithm was developed to detect reduced respiratory movement and SpO2 desaturation.
    • The method was validated on 61 patients using synchronized 3D video and PSG recordings.
    • Performance was assessed using apnea-hypopnea index (AHI) correlation, severity classification, and epoch-based analysis (accuracy, sensitivity, specificity, Cohen's kappa).

    Main Results:

    • The predicted AHI showed excellent agreement with manual PSG (ICC r = 0.94).
    • Severity classification achieved 80% accuracy.
    • Epoch-based analysis yielded Cohen's kappa = 0.72, accuracy = 0.88, sensitivity = 0.80, and specificity = 0.91.

    Conclusions:

    • The 3D camera and SpO2-based detection method demonstrates excellent reliability and substantial agreement with PSG.
    • This non-contact approach offers a potential alternative to traditional, potentially uncomfortable, respiratory monitoring sensors.