Dual Biomarker Diagnostic Device for Heart Attack and GERD Differentiation
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Solution Overview
Problem
Diagnosing chest pain to differentiate between a heart attack and gastroesophageal reflux disease (GERD) is challenging due to overlapping symptoms, with potential misdiagnosis, especially in women, as existing methods fail to provide quick and accurate differentiation.
Innovation Solution
A testing device that collects saliva and blood samples using disposable specimen holders, analyzing for pepsin in saliva and D-dimer protein in blood using membrane-based testing zones with indicator compositions, providing rapid graphical or textual feedback to distinguish between heart attack and GERD symptoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic methods are used to differentiate heart attack and GERD symptoms, then medical professionals can perform comprehensive evaluation, but diagnosis time is extended and misdiagnosis risk increases
Solution Approach 1:
The diagnostic process is segmented into two independent biomarker tests: pepsin detection in saliva for GERD identification and D-dimer detection in blood for heart attack identification. This segmentation allows simultaneous independent testing of both conditions, reducing overall diagnosis time while maintaining comprehensive evaluation capability.
Solution Approach 2:
Biomarkers (pepsin and D-dimer) serve as intermediary substances that provide objective evidence for differentiation. Instead of relying solely on subjective symptom assessment, the test uses these chemical intermediaries to mediate the diagnostic process, enabling faster and more accurate differentiation between the two conditions.
2Reliability
If comprehensive symptom evaluation is performed to ensure accurate diagnosis, then diagnostic reliability improves, but device complexity and testing procedure complexity increase
Solution Approach 1:
The test extracts and measures specific biomarkers (pepsin and D-dimer) from complex biological samples (saliva and blood). By focusing on these extracted key indicators rather than attempting to analyze all possible symptoms and parameters, the device achieves reliable differentiation while maintaining relatively simple testing procedures and device design.
Solution Approach 2:
The diagnostic result is indicated through color changes in the testing zones. When pepsin or D-dimer is detected, the corresponding test zone changes color to indicate presence or absence of the biomarker. This visual color-based output simplifies the interpretation of complex diagnostic information, making the device easier to use while maintaining high diagnostic reliability.
3Productivity
If rapid testing is implemented to reduce diagnosis time, then productivity improves, but measurement precision and reliability may deteriorate
Solution Approach 1:
The testing device is prepared in advance with all necessary reagents, membranes, and testing zones pre-configured. The saliva and blood samples are collected and applied to the device, where pre-loaded reagents immediately begin the detection process. This preliminary preparation eliminates setup time and enables rapid testing while ensuring that proper detection procedures are followed for accurate results.
Solution Approach 2:
The device replaces complex mechanical processing and manual analysis with a simplified biochemical detection system. Biomarkers in the samples interact with pre-configured reagents on membranes, producing visible color changes that indicate results. This substitution of complex mechanical and analytical procedures with straightforward biochemical reactions enables both rapid testing and accurate measurement.
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 quick and accurate differentiation between heart attack and GERD symptoms by detecting pepsin in saliva and D-dimer protein in blood, reducing misdiagnosis and ensuring timely medical intervention for heart attacks.
Implementation Method 1
a membrane in fluid communication with the well and the D-dimer testing zone
Implementation Method 2
The processor is programmed to analyze the collected saliva sample to determine whether pepsin is detected in the collected saliva sample
Implementation Method 3
A composition on the membrane in the D-dimer testing zone is configured, when mixed with blood containing a D-dimer protein, to provide an indicator
Data Source
AI summary
An apparatus and method for testing a patient for distinguishing symptoms of a heart attack and GERD. A saliva specimen holder is configured to collect a saliva sample. A blood specimen holder with a well configured to collect a blood sample, a D-dimer testing zone, and a membrane in fluid communication with the well and the D-dimer testing zone. The membrane is configured to fluidly communicate a blood sample to the D-dimer testing zone. A composition on the membrane in the D-dimer testing zone is configured, when mixed with blood containing a D-dimer protein, to provide an indicator. A processor is programmed to analyze the collected blood sample to determine whether a D-dimer protein is detected in the blood sample and to analyze the saliva sample and to send information to the display indicating whether or not pepsin was detected.