Flexible Antenna for Implantable Medical Device Anatomical Conformity
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Solution Overview
Problem
Existing implantable medical device antennas are not anatomically compliant, leading to discomfort and inefficiency in long-range telemetry communication due to their rigidity and inability to conform to the human anatomy, which affects their performance and comfort.
Innovation Solution
A flexible, bio-compatible metal antenna shaped into multiple turns, encased in a strain relief or elastomer material, allowing it to be bent and retain a shape that conforms to the anatomy, ensuring efficient long-range communication by being securely connected to the implantable medical device housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid antenna structure is used for implantable medical devices, then the antenna maintains stable performance and predictable radiation characteristics, but it causes patient discomfort and cannot conform to anatomical changes
Solution Approach 1:
The patent applies this principle by using a flexible printed circuit board (FPC) as the antenna substrate, allowing the antenna to bend and conform to anatomical surfaces while maintaining its electrical performance. The FPC enables the antenna to adapt to patient-specific geometries without compromising the stability of its radiation characteristics.
Solution Approach 2:
The patent implements dynamics by designing an adjustable and reconfigurable antenna system that can adapt its shape and position after implantation. The flexible antenna can be repositioned or reconfigured to optimize performance while maintaining anatomical conformity, resolving the contradiction between adaptability and stability.
2Ease of operation
If a flexible antenna is used to conform to anatomy, then patient comfort and anatomical adaptation improve, but the antenna may deform or shift position affecting communication reliability
Solution Approach 1:
The patent applies preliminary action by pre-forming the flexible antenna into specific geometric configurations (such as spiral or meander patterns) before implantation. This pre-shaping ensures that once implanted, the antenna maintains its intended radiation pattern and communication performance while conforming to the anatomical surface, preventing deformation that would compromise reliability.
Solution Approach 2:
The patent implements nesting by integrating the flexible antenna within a protective encapsulation or housing structure. This nested configuration protects the flexible antenna from external forces while allowing it to maintain contact with the anatomical surface, ensuring both patient comfort and communication reliability.
3Productivity
If the antenna is made rigid for stable performance, then communication efficiency is maintained, but the device cannot adapt to anatomical changes or be securely positioned
Solution Approach 1:
The patent applies parameter changes by utilizing the electrical properties of the flexible printed circuit board to maintain consistent impedance and radiation characteristics despite physical flexibility. The FPC's controlled impedance design ensures that communication efficiency is preserved while the physical form factor adapts to anatomical variations.
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 flexible antenna enhances communication efficiency and patient comfort by maintaining a conforming shape that adapts to anatomical changes, enabling reliable long-range telemetry without compromising the antenna's performance.
Implementation Method 1
An antenna for facilitating communication between an implanted medical device and external component includes a length of flexible metal shaped into a plurality of turns. The shaped metal is arranged to be located alongside the housing of an implantable medical device.
Data Source
AI summary
A flexible antenna is associated with an active implantable medical device to facilitate communication between the implantable medical device and an external component in the outside world via, for example, long range or far field telemetry. The flexibility of the antenna allows it to conform to the shape of the location at which it is situated, such as on the cranial bone of a patient for an antenna associated with a cranially implanted medical device. The conformability of the antenna helps to maintain the antenna in the desired shape and to maintain it in the desired location relative to implantable medical device and the patient and improves patient comfort.