Implantable Sensor Anchoring Discontinuous Loop Signal Interference
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Solution Overview
Problem
Implantable medical devices face signal transmission interference due to conductive materials used in anchoring devices, which can disrupt the measurement of physiological parameters from the heart.
Innovation Solution
The use of a discontinuous loop formed from conductive materials, covered or laminated with non-conductive materials, for the anchoring device to minimize signal interference, with features like slits and membranes to prevent continuous conductivity around the sensing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conductive materials are used in anchoring devices, then structural strength and electrical conductivity are improved, but signal transmission interference increases
Solution Approach 1:
The anchoring device is designed with a discontinuous loop structure instead of a continuous conductive loop. The loop is segmented into discrete sections that are spaced apart, which maintains the mechanical anchoring function while preventing the formation of a complete conductive loop that would interfere with signal transmission from the implantable sensor.
Solution Approach 2:
Different portions of the anchoring device have different conductivity characteristics. The engagement component that contacts the sensor housing is made non-conductive or has reduced conductivity, while other structural portions may remain conductive for mechanical strength. This localized differentiation allows the device to maintain overall structural integrity while eliminating signal interference at critical areas.
2Reliability
If continuous conductive loop is used for anchoring device, then electrical conductivity is improved, but signal transmission is disrupted
Solution Approach 1:
The continuous conductive loop is divided into discontinuous segments with gaps between them. This segmentation breaks the electrical continuity that would otherwise create a loop antenna effect, preventing the anchoring device from interfering with the wireless signal transmission while maintaining sufficient electrical properties for other functions.
Solution Approach 2:
Non-conductive materials or insulating coatings are introduced as intermediary elements between the conductive structural components and the sensor antenna. These intermediaries prevent direct electromagnetic coupling between the anchoring device and the signal transmission path, allowing both functions to coexist without interference.
3Strength
If conductive anchoring device is used, then mechanical engagement is improved, but signal accuracy deteriorates
Solution Approach 1:
The anchoring device employs local quality differentiation where the engagement components that provide mechanical attachment are made from non-conductive or low-conductivity materials, while structural support elements may use conductive materials for strength. This ensures that the portions closest to the sensor do not interfere with signal accuracy while maintaining overall mechanical engagement capability.
Solution Approach 2:
The anchoring structure is segmented so that only specific portions are conductive, with non-conductive sections positioned strategically near the sensor to prevent signal interference. This segmented approach allows mechanical engagement to be maintained through the conductive structural elements while the non-conductive segments protect signal accuracy.
Data Source
AI summary
Embodiments of the present disclosure relate to implantable medical devices configured to be implanted within a heart with anchor arrangements that reduce or eliminate signal transmission interference of the sensor. The implantable medical devices may include a sensor configured to sense physiological parameters of the heart and a housing comprising a transmitter and an antenna. An anchoring device formed by one or more wound wires including an engagement component is arranged around at least a portion of the housing a first frame component, a second frame component. The first frame component, the second frame component, or the first frame component and the second frame component comprise a first end separated from a second end to form a discontinuous loop and are formed from a conductive material.