Intervertebral Disc Electrode System for Fluid Recovery
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Solution Overview
Problem
Current therapeutic electrical techniques for treating intervertebral discs fail to effectively address the loss of water content in the nucleus pulposus, leading to disc degeneration and abnormal loading on spinal structures, as they do not provide a homogeneous potential distribution within the disc.
Innovation Solution
The method involves implanting multiple intra-pulposus exposed electrode surfaces at different locations within the nucleus pulposus and extra-pulposus exposed electrode surfaces outside the disc, with control circuitry configuring them to apply electroosmotic currents to drive fluid into the nucleus pulposus, correcting abnormal potential distributions and increasing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple intra-pulposus exposed electrode surfaces are implanted at different locations within the nucleus pulposus, then a homogeneous potential distribution is achieved, but the device complexity increases
Solution Approach 1:
The electrode system is divided into multiple independent intra-pulposus exposed electrode surfaces implanted at different locations within the nucleus pulposus, plus extra-pulposus exposed electrode surfaces. This segmentation allows each electrode to be positioned optimally for creating homogeneous potential distribution while maintaining independent controllability through the control circuitry.
Solution Approach 2:
Different regions of the disc are targeted with specific electrode placements. The intra-pulposus electrodes are positioned at different locations within the nucleus pulposus to create locally optimized potential distributions, while extra-pulposus electrodes provide complementary potential control. This local quality approach ensures homogeneous potential distribution throughout the disc.
2Quantity of substance
If electroosmotic currents are applied to drive fluid into the nucleus pulposus, then disc pressure and fluid content are increased, but the risk of tissue damage increases
Solution Approach 1:
The control circuitry monitors the effects of electroosmotic current application and adjusts the current parameters accordingly. This feedback mechanism ensures that fluid is driven into the nucleus pulposus to increase pressure and correct degeneration while preventing excessive currents that could cause tissue damage. The system adapts current magnitude based on real-time responses.
Solution Approach 2:
The system dynamically adjusts electroosmotic current parameters including magnitude, duration, and frequency to achieve the desired fluid influx without causing tissue damage. By changing parameters such as current intensity and application time, the system optimizes fluid recovery while maintaining safety margins to prevent harmful effects.
3Manufacturing precision
If the negative potentials at cathodes are set to be inversely related to their distances from the geometric center, then abnormal potential distribution is corrected, but the control circuitry complexity increases
Solution Approach 1:
The control circuitry dynamically calculates and adjusts the negative potentials at different cathodes based on their positions relative to the geometric center of the disc. This dynamic potential allocation ensures that closer cathodes receive higher negative potentials while farther cathodes receive lower potentials, correcting abnormal potential distributions through adaptive control rather than static fixed potentials.
Solution Approach 2:
The complex mechanical task of manually positioning and adjusting multiple electrodes and their potentials is replaced with an automated control circuitry system. The control circuitry computationally determines the appropriate potential distribution based on electrode positions and automatically applies the correct potentials, substituting manual precision requirements with automated computational control.
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 approach enhances fluid absorption and pressure within the disc, thereby addressing disc degeneration and maintaining disc health by simulating a healthy potential distribution, as demonstrated by experimental mass gain in bovine tail discs.
Implementation Method 1
control circuitry configured to drive the intra-pulposus exposed electrode surfaces and the one or more extra-pulposus exposed electrode surfaces to electroosmotically drive fluid into the nucleus pulposus
Data Source
AI summary
Apparatus (20) for treating an intervertebral disc (30) of a subject is provided. The apparatus (20) includes at least three intra-pulposus exposed electrode surfaces (40), which are configured to be implanted within a nucleus pulposus (42) of the disc (30), at different respective locations; and one or more extra-pulposus exposed electrode surfaces (44), which are configured to be implanted outside the nucleus pulposus (42), in electrical communication with the disc (30). Control circuitry (50) is configured to (a) configure the intra-pulposus exposed electrode surfaces (40) to be cathodes, and the one or more extra-pulposus exposed electrode surfaces (44) to be one or more anodes, and (b) drive the intra-pulposus exposed electrode surfaces (40) and the one or more extra-pulposus exposed electrode surfaces (44) to electroosmotically drive fluid into the nucleus pulposus (40) to increase pressure in the disc (30).