Multi-column Paddle Lead for Precise Spinal Neurostimulation
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Solution Overview
Problem
Conventional neuromodulation therapies for chronic pain management often require multiple implantations and lack precise control over electrical field distribution, leading to unwanted stimulation of non-target areas and reduced efficacy in addressing complex pain patterns.
Innovation Solution
A multi-column, multi-row paddle lead is implanted to allow for precise positioning of electrodes within the cervical or thoracic spinal levels, enabling independent stimulation of specific dorsal column fibers for each pain location with minimal cross-talk, using programmable IPGs to deliver tailored electrical pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional percutaneous leads are used for neurostimulation, then the lead profile remains small and implantation is simpler, but the electrical field resolution is coarse and multiple implantations are required to address multiple pain locations
Solution Approach 1:
The lead incorporates multiple columns (at least two) of electrodes, where each column can be independently controlled to stimulate specific dorsal column fibers. This segmentation allows precise targeting of different pain locations without requiring multiple separate implantations, as each column acts as an independent stimulation channel with fine spatial resolution
Solution Approach 2:
The lead transitions from a single-row configuration to a multi-column multi-row array, adding a lateral dimension to electrode placement. This dimensional expansion enables independent stimulation of multiple dorsal column fibers simultaneously, achieving fine electrical field resolution while maintaining a manageable lead structure through systematic organization of electrodes in columns and rows
2Adaptability or versatility
If conventional single-column leads are used, then the lead structure is simpler, but multiple implantations are required to address complex pain patterns at different spinal levels
Solution Approach 1:
The multi-column lead provides universal coverage for treating various pain patterns at multiple spinal levels through a single implantation. Each column can be programmed to target different dermatomes and pain locations, making the device versatile for addressing complex, multi-location pain without requiring additional surgical procedures
Solution Approach 2:
Multiple electrode columns are combined into a single integrated lead structure that can be implanted once to address multiple pain locations. The columns work together as a unified system, with each column contributing to the overall therapeutic effect by stimulating different dorsal column fibers corresponding to different pain regions
3Object-affected harmful factors
If electrical energy is applied broadly to the spinal cord, then coverage of multiple pain regions is achieved, but unwanted stimulation of non-target areas occurs
Solution Approach 1:
Each column of electrodes is configured to deliver electrical energy with localized precision to specific dorsal column fibers. This local quality control ensures that stimulation is confined to target pain regions while minimizing spread to non-target areas, reducing unwanted side effects through spatially selective energy delivery
Data Source
AI summary
In some embodiments, a paddle lead is implanted within a patient such that the electrodes are positioned within the cervical or thoracic spinal levels. An electrode combination on a first row of electrodes can be determined that is effective for a first pain location with minimal effects on other regions of the body. The first pain location can be addressed by stimulating a first dorsal column fiber due to the relatively fine electrical field resolution achievable by the multiple columns. Then, another electrode combination on a second row of electrodes can be determined for a second pain location with minimal effects on other regions. The second pain location could be addressed by stimulating a second dorsal column fiber. After the determination of the appropriate electrodes for stimulation, the patient's IPG can be programmed to deliver pulses using the first and second rows according to the determined electrode combinations.