Smart Capsule With Magnetic Switch for GI Tract Drug Release
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Solution Overview
Problem
Existing smart capsules for drug delivery in the gastrointestinal tract require location monitoring using gamma rays or fluoroscopy, which are impractical and pose health hazards, and need active patient participation for drug release, making them unsuitable for broader therapeutic applications.
Innovation Solution
A remotely activatable capsule with a magnetic switch and electrical energy reservoir that releases a drug when exposed to a magnetic field, eliminating the need for location monitoring and allowing for passive activation at a selective physiological location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If location monitoring using gamma rays or fluoroscopy is implemented, then capsule location can be tracked, but health hazards and impracticality increase
Solution Approach 1:
The patent removes the radiation-based tracking system entirely from the capsule design. Instead of using gamma rays or fluoroscopy for location monitoring, the invention relies on magnetic field actuation that does not require continuous tracking, thereby eliminating the harmful radiation exposure while still achieving the therapeutic objective of site-specific drug delivery
Solution Approach 2:
The capsule system is designed to function autonomously without requiring external monitoring infrastructure. The magnetic actuation mechanism allows the capsule to be triggered at target locations based on pre-programmed magnetic field patterns, eliminating the need for continuous gamma ray or fluoroscopy monitoring and enabling safe deployment in non-clinical settings
2Ease of operation
If active patient participation is required for drug release triggering, then drug can be released at targeted position, but reliability decreases due to patient inability to trigger at appropriate times
Solution Approach 1:
The patent replaces the manual patient activation mechanism with an automated magnetic field sensing and actuation system. The capsule contains magnetic actuators that respond to externally applied magnetic fields, eliminating the need for patient participation in triggering drug release while ensuring reliable activation at the intended location and time
Solution Approach 2:
The capsule system performs the drug release activation function autonomously by detecting and responding to magnetic field signals. This self-service capability ensures that drug release occurs reliably at the targeted position without requiring patient intervention, solving the timing reliability problem while maintaining ease of use through external magnetic control
3Productivity
If spring-loaded cylinder mechanism is used for drug release, then drug can be forced out through hole, but device complexity increases
Solution Approach 1:
The patent changes the actuation parameter from mechanical spring force to magnetic field interaction. By using magnetic actuators that respond to external magnetic fields, the system achieves rapid drug release without the mechanical complexity of spring-loaded cylinders, pistons, and moving parts, thereby maintaining productivity while reducing device complexity
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 drug delivery to specific locations in the GI tract without the need for real-time tracking, ensuring reliable and safe release of medication at predetermined sites, suitable for treating conditions like Crohn's disease and colon cancer.
Implementation Method 1
The switch can be remotely activated, for example, by a magnetic field
Implementation Method 2
an electrical energy reservoir having a first terminal and a second terminal positioned in the housing
Data Source
AI summary
A remotely activatable capsule. The capsule includes a housing that can be swallowed by a subject, an electrical energy reservoir having a first terminal and a second terminal positioned in the housing, a remotely activatable switch positioned in the housing and configured to be remotely activated, and a function-specific mechanism positioned in the housing and electrically coupled to the remotely activatable switch and to the electrical energy reservoir and configured to perform a function when the remotely activatable switch is activated.