Implantable Anchor Spatially Separates Antenna to Mitigate Faraday Cage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing implantable wireless sensing devices face interference and performance issues due to the Faraday-cage effect from metallic vascular closure devices and mechanical stresses, which affect tele-powering and communication range, and the size of these devices limits delivery catheter diameter.
Innovation Solution
An implantable assembly with an anchor that surrounds the housing portion containing the transducer but not the antenna, maintaining a spatial distance to avoid interference, and using a through-hole design for secure placement within the body, allowing for wireless communication and power transmission without physical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic vascular closure devices are used to anchor implantable wireless sensing devices, then anchoring is achieved, but Faraday-cage effect interferes with tele-powering and wireless communications
Solution Approach 1:
The antenna is extracted from the housing and positioned externally, away from the metallic anchor. This separation removes the antenna from the harmful electromagnetic shielding zone created by the metallic vascular closure device, eliminating the Faraday-cage effect while maintaining secure anchoring through the anchor's engagement with the housing.
Solution Approach 2:
A non-conductive material or spacing structure acts as an intermediary between the metallic anchor and the antenna. This intermediary component physically separates the antenna from the metallic anchor, preventing direct electromagnetic interference while allowing the anchor to securely hold the housing in place.
2Strength
If the sensing device is attached to the closure device, then anchoring is achieved, but mechanical stresses induce drift in sensing performance
Solution Approach 1:
The anchoring function is segmented from the sensing function. The metallic anchor provides mechanical anchoring strength by engaging with the housing, while the sensing elements remain isolated within the housing or positioned away from stress points. This functional segmentation allows the anchor to bear mechanical loads without transmitting stresses to the sensitive transducer components.
Solution Approach 2:
The antenna and sensitive electronic components are extracted from the housing and positioned externally or in stress-free zones. This extraction removes these components from the mechanical stress field generated by the anchor-closure device connection, preventing stress-induced drift while maintaining secure anchoring.
3Volume of moving object
If the device size is reduced, then delivery catheter diameter is reduced, but anchoring capability and antenna effectiveness are compromised
Solution Approach 1:
The antenna is positioned in a different spatial dimension relative to the housing - extending externally rather than being contained within the housing volume. This dimensional reconfiguration allows the antenna to achieve effective communication range without increasing the housing diameter, enabling delivery through smaller catheters while maintaining anchoring capability through the separate anchor component.
Solution Approach 2:
The device is segmented into distinct functional components: a compact housing containing the transducer, a separate anchor for secure attachment, and an externally positioned antenna. This segmentation allows each component to be optimized independently - the housing remains small for easy delivery, the anchor provides sufficient anchoring strength, and the antenna maintains effective communication range.
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
This solution effectively secures implantable devices while minimizing interference and size constraints, enabling reliable long-term monitoring of physiological parameters with reduced Faraday-cage effects and improved delivery options.
Implementation Method 1
metallic vascular closure devices can have a Faraday-cage effect on a wireless sensing device that can adversely affect the range and quality of tele-powering or wireless communications of the sensing device
Data Source
AI summary
Anchors and anchoring methods suitable for use with implantable assemblies that include an implantable device, including but not limited to implantable sensing devices and implantable wireless sensing devices adapted to monitor physiological parameters within living bodies. Such an implantable device has a housing containing a transducer, electrical circuitry, and an antenna. The transducer is located at a first end of the housing opposite a second end of the housing. At least the transducer is located within a housing portion of the housing in which the antenna is not located. The implantable assembly further includes an anchor is adapted for securing the implantable device within a living body.