Urine Sample Identity Verification via DNA Genotyping

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Solution Overview

Problem

Current urine drug testing methods lack a cost-effective and timely way to confirm the identity of a urine sample, making it difficult to ensure that the sample is genuine and from the actual individual, leading to potential adulteration and substitution issues.

Innovation Solution

A method involving DNA extraction and genotyping from both the urine drug testing sample and a reference sample with confirmed donor identity, using PCR and mass spectrometry for analysis and comparison to determine a match or mismatch, thereby verifying the sample's authenticity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If physical observations and chemical tests are used to detect sample adulteration, then some level of detection is achieved, but 100% certainty of sample identity cannot be confirmed

Engineering Contradiction:
Improvesample identity confirmationVSAvoiddetection accuracy
Core Design Contradiction:
ReliabilityVSMeasurement precision

Solution Approach 1:

The patent introduces DNA as an intermediary identifier that bridges the gap between physical/chemical detection and absolute sample identity confirmation. DNA extracted from epithelial cells in the urine sample serves as a unique biological mediator that can be compared against reference samples to provide 100% certainty of donor identity, overcoming the limitations of conventional physical and chemical tests

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If DNA extraction and genotyping are performed to confirm donor identity, then 100% certainty of sample authenticity is achieved, but the process becomes more complex and costly

Engineering Contradiction:
Improvesample identity confirmationVSAvoidtesting process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts only the essential element needed for identification - DNA from epithelial cells in the urine sample - and compares it directly with reference DNA. This extraction approach isolates the critical identification component from the complex urine matrix, enabling reliable donor verification without requiring analysis of the entire sample composition

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent creates a DNA profile copy or fingerprint from the extracted DNA that can be compared against reference profiles. This copying mechanism allows for simplified comparison processes rather than requiring direct complex molecular analysis, reducing procedural complexity while maintaining high reliability

Inventive Principle:
Principle #26Copying

3Ease of manufacture

If conventional physical and chemical tests are used, then the process remains simple and cost-effective, but the ability to confirm sample identity is insufficient

Engineering Contradiction:
Improvetesting process simplicityVSAvoidsample identity confirmation
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent segments the identification process into distinct modules: DNA extraction from urine epithelial cells, DNA amplification/genotyping, and comparison with reference samples. This segmentation allows each step to be optimized independently and performed using standard laboratory techniques, maintaining ease of implementation while achieving high reliability

Inventive Principle:
Principle #1Segmentation

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 provides a faster, cheaper, and more accurate method to rule out adulteration or substitution, ensuring 100% confidence in the urine sample's authenticity, adaptable for both clinical and workplace drug testing.

Implementation Method 1

extracting, or releasing DNA, from the urine drug testing sample and the reference sample

Methodology Applied
Scientific EffectCell lysis:

Implementation Method 2

amplifying and genotyping the extracted or released DNA from the both samples

Methodology Applied
Scientific EffectPolymerase chain reaction:

Implementation Method 3

the donor identity of the reference sample can be confirmed through polymerase chain reaction (PCR) and mass spectrometry (MS)

Methodology Applied
Scientific EffectMass spectrometry:

Data Source

PatentUS20220315992A1Method for identification of urine drug testing sample
Publication Date: 2022.10.06 ID MATCH LLC
  • US20220315992A1 patent drawing

AI summary

A method for identification of a urine sample and for verification of a donor identity of a urine drug testing sample to rule out adulteration or substitution in urine drug testing, comprising: preparing a urine drug testing sample and a reference sample with a confirmed donor identity, extracting or releasing DNA from the urine drug testing sample and the reference sample, amplifying and genotyping the extracted or released DNA from both samples; analyzing and comparing the DNA from the urine drug testing sample to the DNA from the reference sample; and based upon the analysis and comparison results, determining and reporting a match or mismatch between a donor identity of the urine drug testing sample and the donor identity of the reference sample. The donor identity of the reference sample is confirmed to be a person providing the urine drug testing sample.