Handheld Optical Detection of Compartment Syndrome Without Invasive ICP
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Solution Overview
Problem
Current methods for diagnosing acute compartment syndrome (ACS) are invasive and require trained specialists, making them unsuitable for pre-hospital monitoring and emergency situations.
Innovation Solution
A non-invasive hand-held device using optical sensors, pressure sensors, and ultrasound probes to detect compartment syndrome by measuring oxygen saturation, pressure, and stiffness without penetrating the skin, with data processing to determine the presence of ACS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If needle or catheter insertion method is used to measure ICP, then measurement precision is improved, but device complexity and ease of operation worsen due to invasive procedure requiring trained specialists
Solution Approach 1:
The patent replaces the mechanical needle insertion method with an optical sensing system. The optical sensor uses light absorption properties of hemoglobin to non-invasively measure tissue oxygen saturation and infer compartment pressure, eliminating the need for physical penetration of skin and muscle tissue while maintaining diagnostic capability
Solution Approach 2:
The patent introduces light as an intermediary medium to transmit information about internal compartment pressure conditions. By measuring how light interacts with tissue at different wavelengths, the system indirectly detects ICP changes without direct mechanical contact, enabling non-invasive monitoring
2Measurement precision
If needle insertion method is used, then measurement precision is improved, but object-affected harmful factors increase due to invasive nature and infection risk
Solution Approach 1:
The patent substitutes mechanical needle penetration with optical field interaction. The optical sensor measures tissue properties through light absorption and scattering without breaking the skin barrier, thereby eliminating infection risks and tissue damage associated with invasive procedures
Solution Approach 2:
The patent utilizes the body's own optical properties (hemoglobin's light absorption characteristics) to perform the measurement. The tissue itself provides the measurement signal through its interaction with light, eliminating the need for external invasive instruments while maintaining diagnostic accuracy
3Measurement precision
If specialized training is required for ICP measurement, then measurement precision is improved, but ease of operation worsens due to need for highly trained specialists
Solution Approach 1:
The optical sensor system automatically performs measurements and calculations without requiring manual intervention or interpretation by specialists. The device self-calibrates and processes data using algorithms that convert optical signals into diagnostic information, making it accessible to personnel without specialized training
Solution Approach 2:
The patent replaces the need for specialized manual techniques with an automated optical measurement system. The complex interactions between light and tissue are automatically measured and interpreted by the device, eliminating the need for trained specialists to perform manual needle insertion and interpretation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a convenient and accurate means for early detection of ACS in field conditions and emergency rooms, reducing the risk of limb morbidity by enabling timely intervention.
Implementation Method 1
The Beer-Lambert law is used to determine a ratio of light absorption of hemoglobin at two different wavelengths
Implementation Method 2
The optical sensor includes a light emitting diode (LED) and multiple photo detectors at corresponding different distances from the LED. In some embodiments, the LED is configured to output multiple different optical frequencies. In some of these embodiments, the LED is configured to output multiple different infrared optical frequencies.
Data Source
AI summary
Techniques for non-invasive detection of compartment syndrome (CS) in a subject, includes an apparatus having a structural body configured to be held in a human hand. The structural body includes a subject contact element that is not in contact with the human hand and is configured to contact but not penetrate a skin layer of a subject. The apparatus also includes an optical sensor configured to detect oxygen saturation at a plurality of depths of a subject in contact with the subject contact element. The optical sensor includes at least one light emitting diode (LED) and multiple photo detectors at corresponding different distances from the LED.