Implantable Sensor Anchoring Structure for Faraday-Cage Interference
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Solution Overview
Problem
Existing implantable wireless sensing devices face interference from metallic anchors due to Faraday-cage effects and mechanical stresses, affecting tele-powering and performance.
Innovation Solution
Design of implantable wireless sensing devices with a separate housing portion to secure the device to anchors, maintaining a spatial distance from metallic parts to minimize interference and stress, using materials like PEEK or NiTi for attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sensing device is attached directly to metallic anchors, then the device can be securely anchored, but the device experiences Faraday-cage interference and mechanical stress affecting performance
Solution Approach 1:
The housing is divided into two distinct portions: a first housing portion that attaches to the metallic anchor and a second housing portion that contains the sensing device. This segmentation separates the device from the metallic anchor, eliminating Faraday-cage interference while maintaining secure anchoring through the first housing portion.
Solution Approach 2:
The first housing portion acts as an intermediary between the metallic anchor and the sensing device. It provides the attachment interface to the anchor while creating a physical and electromagnetic barrier that protects the sensitive sensing device from both mechanical stress and Faraday-cage effects.
2Volume of moving object
If the sensing device is placed close to metallic anchors, then the overall device size is reduced, but tele-powering and communication are interfered with
Solution Approach 1:
The housing extends in the longitudinal dimension away from the anchor, creating spatial separation along the length of the device. This dimensional arrangement allows the sensing device to be positioned at a distance from the metallic anchor, reducing Faraday-cage interference while maintaining a compact overall footprint through optimized longitudinal positioning.
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
Ensures effective long-term monitoring of cardiovascular and liver health by reducing interference and maintaining device performance, allowing for remote tele-powering and communication.
Implementation Method 1
Existing implantable wireless sensing devices face interference from metallic anchors due to Faraday-cage effects and mechanical stresses, affecting tele-powering and performance
Data Source
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AI summary
Implantable wireless sensor assemblies and methods for monitoring physiological parameters within living bodies. Such sensor assembly includes a sensing device with a housing having an internal cavity, a transducer and electrical circuitry within the cavity, and an antenna that is within the cavity or outside the housing. The sensor assembly further includes a housing portion in which the transducer, the electrical circuitry, and the antenna are not located, and anchoring elements for securing the sensing device within a living body. The housing portion is separately formed and directly attached to a distal end of the housing, or is integrally formed as a discrete region of the housing at the distal end thereof. The anchor elements surround a coupling feature of the housing portion but does not surround the transducer or the antenna of the sensing device.