Multi-Electrode NMES for Deeper Stimulation and Lower Discomfort

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Solution Overview

Problem

Existing neuromuscular electrical stimulation (NMES) devices cause discomfort due to high superficial current density, leading to inefficient energy distribution and potential muscle contraction compromises, especially in larger and deeper muscle groups.

Innovation Solution

Implementing mechanisms such as rapid polarity switching, temperature gradients, magnetic fields, and sensor feedback to guide electrical energy efficiently to deeper muscle tissues, reducing superficial current density and improving comfort and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high energy levels are used to achieve effective muscle contraction in deeper tissues, then muscle stimulation effectiveness is improved, but superficial current density increases causing user discomfort

Engineering Contradiction:

Improvemuscle stimulation effectivenessVSAvoidsuperficial current density

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system divides the stimulation task across multiple electrode pairs, with each pair delivering a portion of the total energy. This segmentation allows the energy to be distributed in a controlled manner, achieving deep tissue stimulation while limiting superficial current density at any single electrode site.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system combines energy from multiple electrode pairs to achieve the required current density in deep tissues. By synchronizing the output from several electrode pairs, the system creates a cumulative effect at depth while each individual electrode pair operates at lower, more comfortable energy levels.

Inventive Principle:

Principle #5Merging (Combining)

2Object-affected harmful factors

If electrode size is increased to reduce current density, then user comfort is improved, but the area of skin required increases and placement becomes more difficult

Engineering Contradiction:

Improvecurrent densityVSAvoidelectrode area

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

Instead of using fewer large electrodes, the system uses multiple smaller electrodes arranged in pairs. This segmentation achieves the same current density reduction effect while maintaining practical electrode sizes that are easier to place and manage on the skin surface.

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If multiple electrode pairs are used to reduce superficial current density, then user comfort is improved, but device complexity increases

Engineering Contradiction:

Improvesuperficial current densityVSAvoidnumber of electrode pairs

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The control system is designed to manage multiple electrode pairs through a unified control architecture that can synchronize and coordinate the output from each pair. This multi-functional approach allows the system to handle the complexity of multiple electrodes while maintaining a user-friendly interface and consistent performance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enhances user comfort and safety during NMES by optimizing energy distribution, allowing lower energy levels for effective muscle contraction without compromising therapeutic benefits.

Implementation Method 1

mechanisms such as rapid polarity switching, temperature gradients, magnetic fields, and sensor feedback to guide electrical energy efficiently to deeper muscle tissues

Methodology Applied

Scientific EffectRapid polarity switching:

Implementation Method 2

mechanisms such as rapid polarity switching, temperature gradients, magnetic fields, and sensor feedback to guide electrical energy efficiently to deeper muscle tissues

Methodology Applied

Scientific EffectTemperature gradient: Temperature Gradient

Implementation Method 3

mechanisms such as rapid polarity switching, temperature gradients, magnetic fields, and sensor feedback to guide electrical energy efficiently to deeper muscle tissues

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Data Source

PatentUS20250288804A1Synergistic muscle activation device

Publication Date: 2025.09.18 SAGE PROD LLC

AI summary

A system for delivering energy to a patient includes a stimulation pad including a first pair of electrodes adapted to be positioned on the patient and deliver energy to the patient, a second pair of electrodes adapted to be positioned on the patient and deliver energy to the patient, and a third pair of electrodes adapted to be positioned on the patient and deliver energy to the patient. The system further includes a stimulation control unit in communication with the first pair of electrodes, the second pair of electrodes, and the third pair of electrodes. The stimulation control unit, in a first time period, controls (i) the first pair of electrodes to take on a positive charge, (ii) the second pair of electrodes to take on a negative charge relative to the first pair of electrodes, and (iii) the third pair of electrodes to be neutral.