Remote Controller Coil Segmentation for IMD Telemetry Interference
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Solution Overview
Problem
Existing implantable medical devices (IMDs) face challenges in effectively transmitting power and detecting telemetry signals at increasing implant depths due to interference between the strong power signal and faint telemetry signal, leading to reduced communication performance between external remote control devices and IMDs.
Innovation Solution
The use of a remote controller with a separate transmit coil and receiver coil configuration, where the receiver coil is designed to cancel out the power signal, allowing for sensitive detection of telemetry signals from the IMD without interference, thereby improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil is used for both power transmission and telemetry reception in the remote controller, then device complexity is reduced, but communication performance deteriorates due to interference between strong power signals and faint telemetry signals
Solution Approach 1:
The remote controller's coil system is segmented into separate transmit and receive coils. The transmit coil is dedicated to power transmission while the receive coil is dedicated to telemetry signal reception, eliminating mutual interference and improving communication reliability at greater implant depths
Solution Approach 2:
The receive coil is extracted as a separate component from the transmit coil assembly. This separation allows the receive coil to be positioned and configured independently to optimize telemetry reception while being shielded from the strong electromagnetic field generated by the transmit coil
2Adaptability or versatility
If implant depth increases, then therapy coverage is improved, but communication performance deteriorates due to signal attenuation and interference
Solution Approach 1:
By segmenting the coil functions, the system can transmit power at high intensity to reach deeper implants while the separate receive coil, positioned to minimize exposure to transmit field interference, can still detect faint telemetry signals from deep implants effectively
Solution Approach 2:
The separate receive coil acts as an intermediary element that bridges the communication gap between the external remote controller and deeply implanted devices, enabling reliable telemetry reception despite the presence of strong power transmission fields and significant signal attenuation
3Power
If power signal strength is increased to power deeper implants, then power transmission capability is improved, but telemetry detection capability deteriorates due to signal interference
Solution Approach 1:
The transmit and receive functions are segmented into separate coils, allowing the transmit coil to operate at high power levels for deep implant powering while the receive coil, physically separated and configured to reject transmit field interference, can detect faint telemetry signals with high precision
Solution Approach 2:
The receive coil is configured to cancel out or counterbalance the interfering power signal through electromagnetic shielding and geometric arrangement, enabling it to detect faint telemetry signals even in the presence of strong power transmission fields
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 configuration enables reliable and efficient inductive power transmission to IMDs at greater depths while maintaining the ability to detect faint telemetry signals, enhancing the overall performance of the IMD-remote controller system.
Implementation Method 1
The remote controller includes a transmit coil for transmitting a power signal to the implantable medical device
Implementation Method 2
The remote controller includes a receiver coil for receiving a telemetry signal from the implantable medical device
Implementation Method 3
The receiver coil is configured to cancel out at least a portion of the power signal
Data Source
AI summary
An apparatus (10) for applying stimulation therapy to a patient includes an implantable medical device (20) and a remote controller (50a) for inductively powering the medical device and communicating with the medical device. The remote controller (50a) includes an improved coil configuration to improve communication performance between the remote controller (50a) and an implanted medical device (20).