Surface Electrogastrography Signal Processing for Artifact Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for diagnosing gastrointestinal (GI) diseases are often invasive, unreliable, and lack non-invasive, real-time assessment of GI functions, with electrogastrography (EGG) facing challenges such as weak signal amplitude, contamination by other bodily signals, and inter-subject variability in anatomy, leading to inconsistent results and limited clinical utility.
Innovation Solution
A non-invasive system using surface electrophysiology recordings with optimized electrode configurations and robust spectrotemporal estimation methods to accurately characterize GI functions, incorporating additional data like imaging and medical history for improved frequency and amplitude estimation, and integrating with wearable devices for ambulatory monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrogastrography (EGG) is used to non-invasively record GI electrophysiology, then non-invasive monitoring is achieved, but signal amplitude is weak (50-200 μV) and signal quality is poor
Solution Approach 1:
The patent divides the abdominal surface into multiple regions with multiple electrodes placed at specific locations (e.g., xiphoid process, umbilicus, mid-clavicular line) to capture localized GI electrophysiological signals. This segmentation allows the system to isolate and amplify specific signal sources while rejecting distant noise, thereby improving signal quality without requiring invasive procedures.
Solution Approach 2:
The patent combines EGG recordings with additional physiological signals including ECG, respiration, and motion sensors. By merging these multiple signal sources and using advanced processing techniques, the system can distinguish GI-specific signals from confounding sources like cardiac activity and respiratory movements, thereby improving measurement precision while maintaining non-invasive operation.
2Device complexity
If standard electrode placement is used for EGG recording, then simplicity is maintained, but inter-subject variability in stomach anatomy results in poor correlation with actual disease status
Solution Approach 1:
The patent implements customized electrode placement protocols that adapt to individual patient anatomy. Using imaging data (ultrasound, CT, or MRI) to locate specific anatomical landmarks, the system places electrodes at optimized positions for each patient's unique stomach configuration. This local customization ensures that electrodes are positioned over the actual gastric regions of interest, improving reliability while accepting increased procedural complexity.
Solution Approach 2:
The patent performs preliminary imaging and anatomical assessment before electrode placement to map individual patient anatomy. This preliminary action allows the system to pre-determine optimal electrode positions based on each patient's specific stomach location and size, ensuring accurate signal capture from the outset rather than relying on standardized positions that may not align with individual anatomy.
3Adaptability or versatility
If EGG recording is performed during patient movement, then ambulatory monitoring capability is achieved, but motion artifacts contaminate the signal and increase exclusion rate
Solution Approach 1:
The patent incorporates motion sensors (accelerometers, gyroscopes) that continuously monitor patient movement during EGG recording. This feedback information is fed into the signal processing algorithm, which uses it to identify and reject motion-contaminated signal segments. The system dynamically adjusts processing parameters based on detected motion levels, maintaining measurement precision during ambulatory monitoring by excluding only the specific time periods affected by excessive motion artifacts.
Solution Approach 2:
The patent introduces motion sensors as intermediary devices that mediate between patient movement and EGG signal quality. These sensors detect motion independently and provide auxiliary information that helps the processing algorithm distinguish between physiological signals and motion-induced artifacts, thereby preserving ambulatory monitoring capability while maintaining signal quality through intelligent artifact rejection.
4Measurement precision
If invasive procedures like endoscopy or manometry are used to assess GI functions, then diagnostic accuracy is improved, but patient discomfort and procedural complexity increase
Solution Approach 1:
The patent replaces invasive mechanical procedures (endoscopy with catheters, manometry with pressure sensors) with non-invasive electrical field measurement. By detecting the natural electrical potentials generated by GI muscle activity through surface electrodes, the system achieves functional assessment without physical intrusion into the GI tract, thereby maintaining diagnostic accuracy while dramatically improving patient comfort and procedural simplicity.
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 system provides reliable, real-time characterization of GI functions, enhancing diagnostic accuracy and clinical utility by improving signal quality and reducing artifacts, enabling effective monitoring outside clinical settings and guiding medication therapy and stimulation therapies.
Implementation Method 1
electrodes to capture a gut electrophysiology recording
Data Source
AI summary
Methods, systems, and devices are disclosed for characterizing the gastrointestinal functions using non-invasive surface recordings from EGG. In one aspect, a system for non-invasively characterizing gastrointestinal functions is disclosed. The system includes electrodes configured to capture a gut electrophysiology recording; and a processor to estimate a frequency and an amplitude of the recording across time.