OCT-Guided Intestinal Potential Difference Probe for Localized Measurement

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Solution Overview

Problem

Current methods for assessing small intestinal permeability are invasive, costly, require specialized facilities, and do not provide localized measurements, making them unsuitable for infants, children, and individuals with sedation issues, and they fail to account for regional variations in permeability.

Innovation Solution

A trans-nasal, optical coherence tomography (OCT)-guided IPD measurement device with a 1.0-1.2 mm probe and Ag/AgCl electrode, using M-mode OCT for contact confirmation and continuous saline perfusion for ionic coupling, allowing non-invasive, real-time, localized intestinal potential difference measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If dual sugars test is used to assess intestinal permeability, then non-invasive measurement is achieved, but specialized facilities and expensive equipment are required

Engineering Contradiction:
ImproveinvasivenessVSAvoidfacility requirements
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces complex chromatography and mass spectroscopy equipment with a simple voltage measurement system. Instead of using sophisticated analytical instruments to detect sugar ratios, the invention uses a probe that directly measures intestinal potential difference with a voltmeter, substituting mechanical/chemical analysis with electrical measurement.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention uses a simple, inexpensive probe that can be easily manufactured and disposed of, replacing the need for expensive, specialized facilities. The probe is a basic electrical measurement device that does not require complex infrastructure.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If dual sugars test is used to assess intestinal permeability, then non-invasive measurement is achieved, but urine sample contamination and difficulty in obtaining pristine samples from infants and children occur

Engineering Contradiction:
ImproveinvasivenessVSAvoidsample quality
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent introduces a probe as an intermediary device that directly contacts the intestinal mucosa to measure potential difference. This intermediary approach bypasses the need for urine or blood samples, allowing direct measurement at the site of interest without contamination issues.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Quantity of substance

If L:M ratio and serum tests are used to assess intestinal permeability, then overall small intestine permeability is measured, but localized/regional variations in permeability are not detected

Engineering Contradiction:
Improvemeasurement scopeVSAvoidlocalized measurement accuracy
Core Design Contradiction:
Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent applies local quality by enabling measurements at specific locations within the intestine. The probe can be positioned at different segments (duodenum, jejunum, ileum) to measure local potential differences, allowing assessment of regional permeability variations rather than just overall intestinal permeability.

Inventive Principle:
Principle #3Local quality

4Measurement precision

If invasive methods are used to obtain localized intestinal permeability measurements, then accurate localized data is obtained, but patient comfort and feasibility for unsedated subjects deteriorates

Engineering Contradiction:
Improvelocalized measurement accuracyVSAvoidpatient comfort
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent extracts the measurement function from invasive surgical procedures. Instead of requiring endoscopy or biopsy, the invention uses a minimal invasive probe that can be introduced through natural lumens (mouth or rectum) to obtain localized measurements without the need for sedation or complex surgical intervention.

Inventive Principle:
Principle #2Taking out (Extraction)

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

Enables minimally invasive, cost-effective, and reliable assessment of intestinal permeability in unsedated subjects, providing accurate, localized measurements without the need for sedation or endoscopy, suitable for clinical and research applications.

Implementation Method 1

IPD values may be measured with reference to subcutaneous tissue

Methodology Applied
Scientific EffectElectrical potential difference measurement: Electric Field

Implementation Method 2

Tissue-probe contact may be confirmed through M-mode OCT imaging

Methodology Applied
Scientific EffectOptical coherence tomography: Tomography

Implementation Method 3

continuous saline perfusion for ionic coupling

Methodology Applied
Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentEP4284281B1Minimally invasive devices for measuring intestinal potential difference
Publication Date: 2026.01.28 THE GENERAL HOSPITAL CORP
  • EP4284281B1 patent drawingFigure 1
  • EP4284281B1 patent drawingFigure 2A~2B
  • EP4284281B1 patent drawingFigure 3A~3B

AI summary

A system for determining intestinal potential difference. The system includes a measurement probe including a measurement tube having a measurement lumen which houses a measurement electrode therein, a measurement fluid delivery system in fluid communication with the measurement lumen, the measurement fluid delivery system being configured to deliver an electrically-conductive fluid into the measurement lumen such that the electrically-conductive fluid is electrically coupled to the measurement electrode, and the measurement lumen including an outlet at a distal end thereof through which the electrically-conductive fluid exits the measurement lumen and contacts an intestinal tissue of a subject to provide electrical coupling between the measurement electrode and the intestinal tissue; a controller coupled to the measurement electrode configured to measure a potential difference between tire measurement electrode and a reference electrode electrically coupled to the subject.