Multisite Implantable Sensor with Shared Two-Wire Bus
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Solution Overview
Problem
Conventional implantable analyte sensors are limited to a single sensing site and require an antenna for power and communication at the same location, restricting their application range and the need for a multisite sensing system with multiple analyte detection capabilities.
Innovation Solution
A multisite sensing system with multiple analyte sensors sharing a single interface device and a two-wire bus for power and communication, allowing for simultaneous detection of multiple analytes and enabling spatially separated analyte detection, with a passive telemetry system using inductive coupling for power and data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional implantable analyte sensor uses a single antenna for power and communication at the same location as the sensing site, then good telemetry coupling with the external transceiver is achieved, but the sensor is limited to only one analyte sensing site and has restricted application range
Solution Approach 1:
The sensing system is segmented into multiple independent sensing sites that can be spatially separated, with each site capable of detecting different analytes. This segmentation allows the system to monitor multiple analytes simultaneously at different locations within the body, expanding application range without requiring a completely new sensor design
Solution Approach 2:
A single antenna is designed to serve multiple functions: it provides both power transfer and bidirectional communication with the external transceiver, and it interfaces with multiple sensing sites simultaneously. This multi-functionality reduces the number of components needed while enabling versatile analyte monitoring applications
2Adaptability or versatility
If multiple analyte sensors are implemented with spatial separation, then multiple analyte detection capabilities are achieved, but the system requires separate antennas and interfaces for each sensing site
Solution Approach 1:
Multiple sensing sites are merged into a single integrated system that shares common power and communication resources. The sensing sites are electrically connected through a shared two-wire bus that carries both power and data signals, eliminating the need for separate antennas and interfaces at each sensing site while maintaining the ability to detect multiple analytes simultaneously
Solution Approach 2:
A single antenna and two-wire bus interface are designed to universally support multiple sensing sites. The interface can selectively communicate with different sensing sites through address identification, allowing one interface to perform the functions of multiple separate interfaces while reducing overall system complexity
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
Enables continuous, long-term implantation and efficient monitoring of multiple analytes with a compact form factor, simplifying assembly and expanding application possibilities beyond single-site sensing.
Implementation Method 1
a passive telemetry system using inductive coupling for power and data transfer
Data Source
Figure 1
AI summary
A multisite sensing system including two or more analyte sensors, an interface device, and a shared bus. The interface device may be configured to receive a power signal and generate power for powering the analyte sensors and to convey data signals generated by the analyte sensors. The shared bus connected to the interface device and each of the analyte sensors and configured to provide the power generated by the interface device to the analyte sensors and to provide the data signals generated by the analyte sensors to the interface device. The interface device may be an inductive element. The shared bus may be a two wire, multiplexed bus. The analyte sensors may be spatially separated for analyte sensing at least two different locations. The analyte sensors may generate data signals indicative of the presence and/or amount of the same analyte or of one or more different analytes.