Nonconductive Resection Cavity Guide for TTFields Concentration

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

After resecting a tumor, the conductive fluid in the resection cavity reduces the efficacy of tumor-treating electrical fields (TTFields) due to direct passage through the cavity, limiting treatment effectiveness on surrounding tumor cells.

Innovation Solution

Positioning a nonconductive material within the resection cavity to allow tumor-treating electric fields to bypass the cavity, using electrodes on either side to generate electric fields that concentrate treatment on the target region.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a nonconductive material is positioned within the resection cavity, then the concentration of electric fields around the target region is enhanced and treatment efficacy is improved, but the device complexity increases

Engineering Contradiction:

Improvetreatment efficacyVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A nonconductive material is introduced as an intermediary substance within the resection cavity to modify the electrical field distribution. This material acts as a mediator that redirects electric field lines away from the conductive fluid, concentrating the field in the peritumoral target region and enhancing treatment efficacy without requiring complex active control systems

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The electrical conductivity parameter of the resection cavity environment is modified by introducing a nonconductive material. This changes the electrical field distribution pattern from one where fields pass directly through conductive fluid to one where fields are concentrated in surrounding tissue, thereby improving treatment effectiveness

Inventive Principle:

Principle #35Parameter changes

2Power

If electrodes are positioned to generate electric fields through the target region, then tumor-treating electric fields are generated, but the conductive fluid in the resection cavity causes fields to pass directly through it, reducing treatment effectiveness

Engineering Contradiction:

Improveelectric field strengthVSAvoidtreatment effectiveness

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The nonconductive material serves as an intermediary that intercepts and redirects electric field lines. When electrodes generate fields on either side of the cavity, the nonconductive material prevents direct field passage through the conductive fluid, forcing fields to concentrate in the peritumoral target region instead

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The conductive fluid, which initially causes harm by shunting electric fields away from the target region, is worked around by the nonconductive material. The presence of the nonconductive material converts this harmful field-shunting effect into a beneficial concentration of fields in the surrounding tumor tissue, where they are needed for treatment

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

The nonconductive material enhances the concentration of electric fields around the target region, improving the efficacy of tumor treatment by preventing direct field passage through conductive fluids.

Implementation Method 1

a nonconductive material positioned within a resection cavity that is adjacent to a target region

Methodology Applied

Scientific EffectElectrical insulation: Electrical Resistance

Implementation Method 2

electric fields between the at least one first electrode and the at least one second electrode travel through the target region

Methodology Applied

Scientific EffectElectric field generation: Electric Field

Implementation Method 3

the cavity is backfilled with fluid that is highly electrically conductive. Accordingly, a substantial portion of the TTFields pass directly through the fluid within the cavity

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12377265B2Nonconductive field guide for resection cavity, and systems and methods of using same

Publication Date: 2025.08.05 NOVOCURE GMBH

AI summary

A method for treating tumor cells around a resection cavity comprises positioning a nonconductive material within a resection cavity that is adjacent to a target region. At least a first electrode and a second electrode are positioned relative to the tumor resection cavity so that electric fields between the at least one first electrode and the at least one second electrode travel through the target region. Tumor-treating electric fields are the generated between the at least one first electrode and the at least one second electrode.