Video-Based Tidal Volume Monitoring via Depth Sensing
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Solution Overview
Problem
Conventional medical monitors require physical attachment of sensors to patients, which can be cumbersome and may not be suitable for long-term monitoring of tidal volume.
Innovation Solution
A video-based method that uses a processor to receive images with depth information, determine a reference point, and define a region of interest corresponding to the patient's trunk area, allowing for non-contact monitoring of tidal volume changes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensors are attached to the patient, then measurement precision of tidal volume is improved, but device complexity and patient discomfort increase
Solution Approach 1:
The patent replaces mechanical contact-based sensing (physical sensors attached to the patient's chest) with optical sensing using a video camera. The system captures video images of the patient's chest wall and uses image processing to detect respiratory movements and calculate tidal volume, thereby eliminating the need for mechanical sensor attachment while maintaining measurement capability.
Solution Approach 2:
The patent creates a visual copy (video image) of the patient's chest wall movements and processes this copy to extract respiratory information. Instead of directly measuring physical displacement with contact sensors, the system captures optical information and derives tidal volume data from the video feed, using the visual representation as a surrogate for direct mechanical measurement.
2Measurement precision
If contact sensors are used for tidal volume monitoring, then measurement accuracy is improved, but ease of operation deteriorates due to cumbersome attachment
Solution Approach 1:
The patent eliminates the mechanical attachment process by substituting contact-based sensors with a video camera-based optical system. The camera simply records video of the patient's chest movements without requiring any physical attachment to the patient's body, making the system easy to deploy and remove while maintaining measurement functionality.
3Reliability
If physical sensors are attached to monitor respiratory signals, then reliability of monitoring is improved, but patient comfort deteriorates
Solution Approach 1:
The patent replaces mechanical contact sensors with an optical video-based system that monitors chest wall movements remotely. This substitution eliminates skin irritation, pressure sores, and discomfort associated with attached sensors while maintaining the ability to reliably detect respiratory movements through optical means.
4Measurement precision
If conventional monitoring systems are used, then measurement precision is improved, but adaptability deteriorates for long-term monitoring
Solution Approach 1:
The patent replaces cumbersome mechanical sensor systems with a non-contact video-based monitoring system that can operate continuously without disturbing the patient. This enables long-term monitoring in natural settings, as the system can capture respiratory data over extended periods without requiring repeated sensor attachment or causing patient discomfort that would limit monitoring duration.
Data Source
AI summary
The present invention relates to the field of medical monitoring, and in particular non-contact video monitoring to measure tidal volume of a patient. Systems, methods, and computer readable media are described for determining a region of interest of a patient and monitoring that region of interest to determine tidal volume of the patient. This may be accomplished using a depth sensing camera to monitor a patient and determine how their chest and/or other body parts are moving as the patient breathes. This sensing of movement can be used to determine the tidal volume measurement.