Trans-spinal Direct Current Stimulation for Spinal Cord Repair
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Solution Overview
Problem
Current treatments for spinal cord disorders and injuries often lack effective non-invasive methods, with implantable stimulators requiring surgical implantation and limited therapeutic options for functional impairments.
Innovation Solution
The use of direct current stimulation, specifically cathodal or anodal stimulation, applied at the dorsal aspect of the spinal cord to promote cellular proliferation, differentiation, and migration, potentially combined with neural stem cell injection and biomaterial implantation, to treat spinal cord disorders and traumas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If implantable spinal cord stimulators are used to treat spinal cord disorders, then pain treatment capability is improved, but surgical implantation requirement and device complexity increase
Solution Approach 1:
The patent replaces the mechanical/physical implantable device system with a non-invasive electrical stimulation system. Instead of surgically implanting electrodes directly into the spinal cord, the invention uses external electrical stimulation devices that can modulate spinal cord activity through the skin and soft tissues, thereby eliminating surgical requirements while maintaining therapeutic capability
Solution Approach 2:
The patent introduces an intermediary non-invasive stimulation method between the external world and the spinal cord. Rather than direct electrode contact with spinal cord tissue, the system uses electrical fields that penetrate through intermediate tissues (skin, muscle, fat) to reach and modulate spinal cord neurons, serving as a mediator that avoids direct invasion
2Reliability
If implantable spinal cord stimulators are used to treat spinal cord disorders, then pain treatment capability is improved, but therapeutic options for functional impairments are limited
Solution Approach 1:
The patent creates a universal stimulation platform that can address multiple types of spinal cord disorders through adjustable electrical stimulation parameters. By varying current intensity, pulse duration, frequency, and electrode configuration, the same non-invasive device can treat pain conditions, promote functional recovery, stimulate neuroplasticity, and support rehabilitation across different spinal cord pathologies
Solution Approach 2:
The patent utilizes parameter changes in electrical stimulation to expand therapeutic versatility. By systematically adjusting stimulation parameters (amplitude, frequency, pulse width, duty cycle, waveform shape), the system can elicit different physiological responses ranging from pain gate control at low frequencies to promotion of neurogenesis and axonal regeneration at specific parameter combinations, thereby addressing diverse functional impairments
3Reliability
If non-invasive direct current stimulation is applied to promote cellular proliferation and differentiation, then therapeutic benefit for spinal cord repair is improved, but treatment time and energy consumption increase
Solution Approach 1:
The patent employs periodic electrical stimulation protocols to promote spinal cord repair. By delivering stimulation in repeated cycles with specific frequencies and duty cycles, the system enhances cellular proliferation and differentiation effects while allowing rest periods that may facilitate tissue recovery and reduce energy consumption, thereby achieving therapeutic benefits more efficiently than continuous stimulation
Solution Approach 2:
The patent implements continuous or near-continuous stimulation protocols that maintain therapeutic electrical field presence over extended periods. Through multiple daily treatment sessions or prolonged single sessions, the system ensures continuous promotion of neurogenic and reparative processes, leveraging the cumulative effect of sustained stimulation to accelerate spinal cord repair while managing energy requirements through efficient power delivery
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 induces neural cell migration, proliferation, and differentiation, promoting repair and recovery of spinal cord pathways, and modulating protein expression to suppress inflammation and enhance neuronal formation.
Implementation Method 1
The use of electrical stimulation for the treatment of spinal cord conditions has primarily focused on using implantable spinal cord stimulators
Implementation Method 2
applying at least one of cathodal or anodal stimulation at the dorsal aspect of the spinal cord in the area of a site of the condition to regulate biological activity of at least one of protein expression level or cell behavior
Data Source
AI summary
Methods, systems and devices are disclosed for treating a spinal disorder by applying a source of direct current to a spinal cord in animals, including humans. Trans-spinal direct current stimulation (tsDCS) uses direct current via cathodal and/or anodal stimulation to induce cell proliferation, cell differentiation, and/or cell migration at or near the area of the spinal cord being treated, and up-regulates or down-regulates protein expression by cells at or near the area of the spinal cord being treated.