Magnetic Docking Group for Implantable Infusion Device
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Solution Overview
Problem
The existing system for controlled substance administration through implanted infusion devices faces issues with the effectiveness and reliability of the needle punching action during docking, due to torque opposition and magnetic attraction force reduction by tissue layers, leading to potential detachment and unpredictable docking behavior.
Innovation Solution
A magnetic docking group with two independently controllable docking units positioned at axial ends of the capsule, ensuring stable and precise docking, and a capsule design with ferromagnetic rings housed in annular slots, preventing torque-induced detachment and ensuring reliable substance transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnetic docking unit is used, then the device complexity is reduced, but the docking reliability and stability deteriorate due to torque opposition and magnetic attraction force reduction by tissue layers
Solution Approach 1:
The docking group is divided into two independent docking units positioned at axial ends of the capsule, each capable of independently attracting and docking with ferromagnetic rings on the carrier. This segmentation allows balanced magnetic forces that counteract torque opposition from tissue layers, significantly improving docking stability and reliability while maintaining manageable device complexity through modular design
2Productivity
If the needle punching action is performed at a point displaced towards one end, then the substance transfer is facilitated, but a torque opposes docking causing potential detachment
Solution Approach 1:
The docking group comprises two independently controllable docking units positioned at axial ends, creating balanced magnetic attraction forces that counteract the torque generated by off-center needle punching. This segmentation allows the system to maintain docking stability even when the needle punches at a displaced position for efficient substance transfer
Solution Approach 2:
The two docking units create counterbalancing magnetic forces that act as a counterweight to the torque opposition generated by displaced needle punching. The distributed magnetic attraction forces compensate for the destabilizing torque, preventing carrier detachment while allowing effective substance transfer
3Object-affected harmful factors
If tissue layers are present between the docking circuit and carrier, then the magnetic attraction force is reduced, but the docking reliability deteriorates leading to unpredictable behavior
Solution Approach 1:
The two docking units are positioned at axial ends of the capsule, distributing the magnetic attraction force across different locations. This segmentation reduces the impact of tissue layer interference at any single location, as the combined effect of both docking units maintains sufficient total attraction force for reliable docking
Solution Approach 2:
The system employs two docking units that provide excessive magnetic attraction force compared to a single unit, ensuring that even when tissue layers reduce the effectiveness of individual units, the combined force remains sufficient for reliable and consistent docking
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 solution provides a safer, more stable, and reliable operation of the system, facilitating easier fabrication, assembly, and filling, while maintaining the integrity of the metallic components and preventing substance exposure to gastrointestinal fluids.
Implementation Method 1
The magnet can rotate around its axis of 90° (thanks to a motor and a gear transmission) to switch from a deactivated condition to an activated one. The permanent magnet is oriented with respect to the two non-ferromagnetic elements so that, when the poles of the magnet are turned towards them, the field lines are shut from the north to the south poles on a short path through the close ferromagnetic material, with no magnetic field outside.
Implementation Method 2
The docking group presents two ferromagnetic elements enclosing a diametrically magnetized permanent magnet. The anchoring of the carrier to the device is allowed by the attraction force exerted by the docking circuit.
Implementation Method 3
The docking group presents two ferromagnetic elements enclosing a diametrically magnetized permanent magnet. A metallic magnetizable structure, possibly covered with a polymeric coating avoiding the direct contact of the metal with the anatomical environment, is included in the carrier body, at a central portion thereof.
Data Source
AI summary
The present invention generally relates to the controlled administration of substances through infusion devices implanted in the human body and more particularly has as an object an improved system for the controlled administration of a substance such as a drug, a hormone or a hormone complex and the like for which other administration modes result unsatisfactory or ineffective. More specifically, the invention is directed to such a system having an implanted infusion device provided with an improved docking group for reliably docking an ingestible substance carrier. The invention also relates to a special construction of the carrier.