Intermingled Electrode Zones for TENS EMS Threshold Differentiation
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Solution Overview
Problem
Existing electrode systems for TENS and EMS stimulation face challenges in efficiently targeting specific nerve types and achieving optimal current penetration, with issues related to electrode positioning, size, and adaptation, leading to ineffective pain relief and muscle stimulation.
Innovation Solution
The development of an electrode set with intermingled active zones of reduced surface area, allowing for adjustable polarity and spacing, which are connected to a stimulator to selectively target sensory or motor nerves, using a gel layer for improved adhesion and conductivity, and optimizing electrode dimensions to differentiate TENS and EMS thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If electrodes of large surface area are used, then current penetration depth is improved, but electrode positioning precision and ability to target specific nerve types deteriorates
Solution Approach 1:
The electrode is divided into multiple independent active zones with different surface areas (small, medium, large) arranged in an intermingled pattern. This segmentation allows selective activation of specific zone sizes to target different nerve types while maintaining overall positioning precision through the structured arrangement of zones.
Solution Approach 2:
Different regions of the electrode (active zones) are assigned different surface area properties (small, medium, large) to create local quality variations. This enables specific zones to be optimized for targeting specific nerve types while maintaining overall electrode positioning on the body.
2Measurement precision
If electrode surface area is reduced, then ability to differentiate TENS and EMS thresholds is improved, but current penetration capability deteriorates
Solution Approach 1:
The electrode incorporates multiple active zones with different surface areas to create distinct current density profiles. Small zones provide high current density for TENS threshold differentiation, while large zones provide low current density for deeper EMS penetration, resolving the contradiction between threshold precision and penetration capability.
Solution Approach 2:
The electrode design varies the surface area parameter across different active zones. By changing this geometric parameter, the electrode can adjust current density and penetration depth to differentiate between TENS and EMS thresholds while maintaining both measurement precision and penetration capability through appropriate zone selection.
3Manufacturing precision
If multiple electrodes are placed close together, then ability to target specific sensory nerves is improved, but risk of unwanted muscle stimulation increases
Solution Approach 1:
The electrode is segmented into multiple small active zones arranged in an intermingled pattern with alternating polarities. This segmentation allows precise targeting of sensory nerves through selective activation of specific small zones while the alternating polarity arrangement and small zone size limit current spread, preventing unwanted muscle stimulation.
Solution Approach 2:
Different active zones are designed with specific local properties (small surface area, specific polarity) to create localized current fields that target sensory nerves precisely. The local quality of each zone is optimized to deliver sufficient current for sensory activation while limiting the field spread to avoid muscle stimulation.
4Length of stationary object
If electrode size is increased for EMS stimulation, then muscle penetration is improved, but ability to provide high intensity TENS treatment without muscle stimulation deteriorates
Solution Approach 1:
The electrode provides both small and large active zones in an intermingled arrangement. For TENS treatment, small zones are activated to deliver high intensity current with precise localization that prevents muscle stimulation. For EMS treatment, large zones are activated to provide deep muscle penetration. This segmentation resolves the contradiction between TENS intensity and muscle penetration.
Solution Approach 2:
Different regions of the electrode are optimized with different surface area qualities: small zones for high current density TENS applications and large zones for low current density EMS applications. This local quality differentiation enables the electrode to provide both high intensity TENS treatment and deep muscle penetration as needed.
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 enables more efficient and effective TENS and EMS stimulation by clearly differentiating sensory and motor thresholds, allowing for higher intensity TENS treatment without muscle stimulation, improved pain relief, and simplified electrode placement, while avoiding unwanted muscle contractions.
Implementation Method 1
using a gel layer for improved adhesion and conductivity
Implementation Method 2
using a gel layer for improved adhesion and conductivity
Data Source
AI summary
The electrode set for a stimulation device, such as a TENS or EMS stimulation device comprises at least a plurality of neighboring electrically active zones close to each other said active zones forming a succession of poles of alternating polarity or being grouped to form groups of poles of alternating polarity, wherein at least one of said active zone or group of zones has a lateral size (D2) of approximately 1 mm to 40 mm, wherein at least one of spacing (D1) between neighboring active zones or groups of zones is approximately of 1 mm to 40 mm, and said set further comprises contacting means connected to said active zones or groups of active zones.