Variable Power Implantable Medical Device Telemetry
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Solution Overview
Problem
Conventional implantable medical devices (IMDs) operate with fixed power characteristics, leading to inefficient power usage and reduced battery life, as they do not dynamically adjust power based on the operating environment or the context of the data being transmitted.
Innovation Solution
IMDs are equipped with the ability to dynamically adjust their power characteristics based on information about the telemetry communication device, current communication context, and the type of data being transmitted, using power scaling routines to optimize battery life and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If IMDs use fixed power characteristics for telemetry communication, then the device operation is simple and reliable, but power consumption is inefficient and battery life is reduced
Solution Approach 1:
The patent implements dynamic power characteristics by allowing the IMD to adjust its transmit power level based on the specific telemetry communication context. The device can select from multiple power levels (e.g., high, medium, low) depending on factors such as the type of external device, communication distance, and data priority, transforming the fixed power system into a dynamic one that adapts to operational conditions.
Solution Approach 2:
The patent changes the power parameter of the IMD by introducing variable power characteristics. The device can modify its transmit power level as a controllable parameter based on communication requirements, device type information, and telemetry context, thereby optimizing energy consumption while maintaining reliable communication.
2Reliability
If IMDs transmit telemetry signals with sufficient energy to meet minimum transmission range, then communication reliability is maintained, but transmitter output power is wasted when full power is not needed
Solution Approach 1:
The patent applies partial action by transmitting telemetry signals with just enough power to achieve reliable communication rather than always using maximum power. The device adjusts its transmit power to the minimum necessary level based on communication conditions, avoiding excessive power transmission that would waste energy while still maintaining communication reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the IMD receives information about communication conditions, external device type, and signal quality, then uses this feedback to adjust its transmit power level accordingly. This closed-loop control ensures reliable communication while optimizing power consumption by avoiding unnecessary high-power transmission.
3Duration of action of moving object
If IMDs adjust power characteristics dynamically based on communication context and device type, then energy consumption is optimized and battery life is extended, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the IMD to automatically adjust its own power characteristics based on its internal state and communication context. The device uses its own sensors, processors, and stored information about external devices to make autonomous power management decisions, reducing the need for complex external control systems while extending battery life.
Solution Approach 2:
The patent implements a universal power management approach where a single power control mechanism handles multiple scenarios and device types. The IMD uses a unified set of power levels and adjustment rules that work across different communication contexts, external devices, and telemetry situations, simplifying the overall system while achieving optimized power consumption.
Data Source
AI summary
An implantable medical device (“IMD”) as described herein includes adjustable power characteristics such as variable transmitter output power and variable receiver front end gain. These power characteristics can be adjusted in a dynamic manner based upon various operating aspects of the intended or actual IMD telemetry environment. These operating aspects may include the external telemetry device type, the IMD device type, and/or the type, context, or meaning of the telemetry data transmitted by the IMD. The IMD may process information related to these operating aspects to generate power scaling instructions or control signals that are interpreted by the IMD transmitter and/or the IMD receiver. Such adjustability enables the IMD to satisfy minimum telemetry requirements in a manner that does not waste power, thus extending the IMD battery life.