Fetal Blood Oxygen Detection Using Multi-Receiver Signal Synthesis
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Solution Overview
Problem
Current trans-abdominal non-invasive fetal blood oxygen saturation detection methods face challenges due to uncertainty in fetal position and light attenuation, leading to unreliable detection results and potential unnecessary medical interventions.
Innovation Solution
A trans-abdominal non-invasive fetal blood oxygen saturation detection device that uses a light-emitting light source emitting multiple wavelengths and a plurality of light receivers to collect and synthesize optical signals, combined with correlation analysis and weighting to improve signal intensity and reduce noise interference, while ensuring safe optical power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a photoelectric sensor is placed outside the abdominal cavity for non-invasive detection, then the detection method becomes safer and more comfortable for pregnant women, but the optical signal intensity becomes extremely weak due to long optical path and tissue attenuation
Solution Approach 1:
The patent divides the detection system into multiple light receivers positioned at different locations outside the abdominal cavity. Each receiver captures a portion of the optical signal, and the signals are synthesized together to achieve sufficient intensity while maintaining non-invasive safety.
Solution Approach 2:
The patent combines signals from multiple light receivers through synthesis processing. By merging multiple weak optical signals collected from different positions, the system achieves a usable signal intensity without requiring high-power single-point illumination that would compromise safety.
2Measurement precision
If the optical power is increased to improve signal intensity, then the detection accuracy improves, but the risk of optical radiation damage to the fetus and pregnant woman increases
Solution Approach 1:
Instead of using a single high-power light source, the system segments the illumination into multiple lower-power sources distributed across the abdominal cavity. This segmentation allows achieving sufficient total signal intensity while keeping the power density at any single point below safety thresholds.
Solution Approach 2:
The patent transitions from a single-point detection approach to a distributed multi-point detection system. By spreading the light receivers across multiple positions outside the abdominal cavity, the system collects signals from different optical paths, achieving better detection accuracy without concentrating harmful optical power.
3Device complexity
If a single light receiver is used to simplify the device structure, then the device complexity is reduced, but the detection reliability decreases due to fetal position uncertainty and signal attenuation
Solution Approach 1:
The patent segments the detection function across multiple light receivers positioned at different locations. This segmentation ensures that even if the fetus moves to a position that attenuates signals from some receivers, other receivers can still capture sufficient signal, thereby maintaining detection reliability.
Solution Approach 2:
The system synthesizes signals from multiple light receivers and uses feedback processing to identify and weight the most reliable signals. This feedback mechanism allows the system to adapt to fetal position changes and maintain reliable detection despite variations in individual receiver signal quality.
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
The device enhances the accuracy and reliability of fetal blood oxygen saturation detection by improving signal intensity and reducing noise interference, thereby supporting more informed medical decisions without increasing optical power risks.
Implementation Method 1
The light-emitting light source device is configured to emit optical signals of two or more different wavelengths into the abdominal cavity of a pregnant woman
Implementation Method 2
The optical signal received by the light receiver, which is related to the fetal blood oxygen saturation, is extremely weak light obtained after undergoing complex processes such as absorption, reflection and scattering of fetal tissues and pregnant women tissues
Implementation Method 3
The optical signal received by the light receiver, which is related to the fetal blood oxygen saturation, is extremely weak light obtained after undergoing complex processes such as absorption, reflection and scattering of fetal tissues and pregnant women tissues
Implementation Method 4
A trans-abdominal non-invasive fetal blood oxygen saturation detection device that uses a light-emitting light source emitting multiple wavelengths and a plurality of light receivers to collect and synthesize optical signals, combined with correlation analysis and weighting to improve signal intensity and reduce noise interference
Data Source
AI summary
A trans-abdominal non-invasive fetal blood oxygen saturation detection device comprises a trans-abdominal fetal oximeter and a signal detection assembly connected to the trans-abdominal fetal oximeter. The trans-abdominal oximeter comprises a signal processing controller. The signal detection assembly comprises a light-emitting light source device and a light receiving device, wherein the light-emitting light source device, the light receiving device and a reference signal detection device are all connected to the signal processing controller. The light-emitting light source device irradiates two or more different wavelengths of light into the abdominal cavity of a pregnant woman. The light receiving device comprises a plurality of light receivers respectively placed at a plurality of different positions outside the abdominal cavity of the pregnant woman, and is configured to collect a plurality of optical signals related to the fetal blood oxygen saturation, which are scattered and reflected back from the abdominal cavity of the pregnant woman through the plurality of light receivers, synthesize the optical signals into an optical signal sum related to the fetal blood oxygen saturation and then output it to the signal processing controller, such that the intensity of the received optical signals is improved.