GI Tract Positioning Switch Using Degradable Film and Inert Electrodes
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Solution Overview
Problem
Current gastrointestinal tract positioning techniques for site-specific drug delivery are complex, energy-intensive, and lack accuracy, often requiring external instruments and failing to effectively target specific regions of the GI tract due to limitations in pH sensor stability and drug absorption characteristics.
Innovation Solution
A GI tract positioning switch with inert electrodes and a degradable positioning film that forms a circuit upon exposure to digestive juices, allowing for independent drug delivery and sampling without external instruments, optimizing space and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external equipment assistance methods are used for positioning (X-ray transmission, high-frequency magnetic field), then positioning capability is achieved, but device complexity and energy consumption increase significantly
Solution Approach 1:
The positioning switch performs self-positioning within the GI tract by detecting local pH changes autonomously, eliminating the need for external positioning equipment. The switch senses pH variations caused by different GI tract environments and automatically triggers drug release at the target site,实现ing self-service positioning without external instrument assistance.
Solution Approach 2:
The patent replaces complex mechanical/electromagnetic positioning systems (X-ray, magnetic field) with a chemical sensing mechanism based on pH detection. The positioning function is achieved through electrochemical sensing of local pH changes rather than through complex electromagnetic fields or mechanical positioning devices, simplifying the overall system.
2Measurement precision
If pH sensors are used for positioning, then positioning function is achieved, but sensor stability and service life deteriorate
Solution Approach 1:
The patent changes the operating parameter range of the pH sensor by optimizing its working voltage to a low range (0.5-2V). This parameter change reduces the stress on the sensor, minimizing drift and degradation, thereby improving stability and extending service life while maintaining positioning capability.
Solution Approach 2:
The positioning switch uses a composite structure combining pH-sensitive materials with inert electrodes. This composite design enhances the sensor's stability by protecting the pH-sensitive component while maintaining its detection capability, and the inert electrodes provide long-term reliability in the corrosive GI tract environment.
3Measurement precision
If traditional pH sensors (glass electrode, antimony electrode) are used, then pH detection is achieved, but device integration difficulty and corrosion resistance worsen
Solution Approach 1:
The patent extracts only the essential pH sensing function from traditional complex pH sensor structures. By using simplified electrode configurations and focusing on the core electrochemical detection mechanism, the design eliminates unnecessary components, making the sensor easier to integrate into the capsule while maintaining pH detection capability.
4Reliability
If inert electrodes are used, then corrosion resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies inert materials specifically at the electrode surfaces where corrosion resistance is most critical, while other parts of the device can use different materials optimized for their specific functions. This localized application of inert materials provides necessary corrosion resistance without requiring the entire device to be made from expensive inert materials, thus reducing manufacturing complexity and cost.
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
Enables precise drug delivery and sampling at specific GI tract regions, simplifying operations, reducing the need for external instruments, and enhancing drug absorption research while minimizing space and cost within the capsule.
Implementation Method 1
exposed after dissolution or/and degradation of the positioning film in the stomach or intestine
Implementation Method 2
exposed after dissolution or/and degradation of the positioning film in the stomach or intestine
Implementation Method 3
both the first electrode and the second electrode are an inert electrode, and is exposed after dissolution or/and degradation of the positioning film in the stomach or intestine
Data Source
AI summary
The present invention provides a gastrointestinal tract positioning switch, a method of manufacturing the gastrointestinal tract positioning switch and a site-specific delivery capsule. The gastrointestinal tract positioning switch includes a base, a first electrode, a second electrode, a conductive device and a positioning film. The first electrode and the second electrode are spaced apart from each other and fixed on the base. The first electrode and the second electrode electrically connected to the conductive device respectively, and covered by the positioning film. Both the first electrode and the second electrode are an inert electrode, and can be exposed after dissolution or/and degradation of the positioning film in the stomach or intestine.