Urostomy Bag UTI Detection Using Integrated Urine Diagnostics

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Solution Overview

Problem

Urostomates are prone to urinary tract infections (UTIs), which are difficult to detect due to the incapacity to urinate on demand and the complexity of using additional devices, leading to increased infection risk and complications.

Innovation Solution

An integrated diagnostic device within a urostomy bag that detects UTIs by analyzing urine for leukocytes and nitrites, providing visual indicators for early detection and self-monitoring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If an integrated diagnostic device is added to the urostomy bag, then UTI detection capability is improved, but device complexity increases

Engineering Contradiction:
ImproveUTI detection capabilityVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The diagnostic device is integrated directly into the urostomy bag pouch, merging the collection function and diagnostic function into a single unified device. This eliminates the need for separate collection bags and separate diagnostic testing, thereby improving UTI detection capability while avoiding the complexity increase that would result from using multiple separate devices

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The urostomy bag is designed to perform multiple functions: waste collection, waste storage, and diagnostic testing for UTIs. The pouch serves as both the collection container and the testing chamber, allowing the same device to handle both collection and diagnosis without requiring additional specialized equipment

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If traditional separate diagnostic devices are used, then detection accuracy is maintained, but ease of operation deteriorates

Engineering Contradiction:
Improveease of operationVSAvoiddetection accuracy
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The system enables the user to perform diagnostic testing themselves by simply observing visual indicators on the pouch. The diagnostic device automatically detects UTIs through chemical reactions with urine components (leukocytes, nitrites) and provides immediate visual feedback, eliminating the need for users to manually operate complex diagnostic equipment or interpret complex results

Inventive Principle:
Principle #25Self-service

3Measurement precision

If frequent healthcare visits are made for UTI detection, then early detection accuracy is improved, but loss of time increases

Engineering Contradiction:
Improveearly detection accuracyVSAvoidloss of time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The diagnostic device enables continuous preliminary monitoring of UTI conditions directly at home through the urostomy bag. By providing immediate detection capabilities that work continuously in the background, the system detects infections at the earliest stages without requiring scheduled healthcare visits, thereby maintaining high early detection accuracy while eliminating time loss from travel and waiting

Inventive Principle:
Principle #10Preliminary action

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

Facilitates easy and compliant monitoring of UTIs, reducing anxiety, healthcare visits, and treatment costs, while enabling early detection and prevention of kidney infections.

Implementation Method 1

an integrated diagnostic device for detection of urinary tract infection... capable of detecting and indicating concentrations of leukocytes or white blood cells and/or nitrites to give an indication of presence of a UTI

Methodology Applied
Scientific EffectChemical reaction: Chemical Bonding

Data Source

PatentEP3426202B1Diagnostic urostomy bag
Publication Date: 2026.04.15 WELLAND MEDICAL
  • EP3426202B1 patent drawingFigure 1
  • EP3426202B1 patent drawingFigure 2
  • EP3426202B1 patent drawingFigure 3~4

AI summary

An ostomy bag (1) has a flange (3) adjoining at least one pouch (2) wherein the pouch (2) has an integrated diagnostic device (4) for detection of urinary tract infection and an inlet (5) leading to a waste collection space (6) defined by two opposing surfaces of two walls (7) (8), the opposing surfaces configured to separate on the introduction of waste through the inlet (5).