VAMWCNT Probe for Real-Time Cancer Detection
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Solution Overview
Problem
Current cancer diagnosis methods are costly, complex, and lack real-time, label-free solutions for detecting cancerous regions during surgery, particularly in breast tissue, leading to inadequate precision and potential removal of healthy tissue.
Innovation Solution
A method and device using a probe with vertically aligned multi-walled carbon nanotubes (VAMWCNTs) electrodes for non-invasive detection of cancer by measuring hydrogen peroxide (H2O2) oxidation currents, allowing for real-time, label-free diagnosis during surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pathology assays and electrochemical methods with chemically labelled electrodes are used for cancer detection, then diagnostic accuracy can be achieved, but the methods are expensive, complicated, and time-consuming
Solution Approach 1:
The patent extracts and eliminates the labeling step from the electrochemical detection process. By using direct electrochemical detection of endogenous metabolites (lactate, pyruvate, H2O2) without requiring chemical labels or markers, the method simplifies the overall procedure while maintaining diagnostic accuracy. This is achieved through selective electrochemical sensors that can directly measure metabolite concentrations in tissue samples.
Solution Approach 2:
The patent employs endogenous metabolites (lactate, pyruvate, hydrogen peroxide) as natural biomarkers that are already present in cancerous tissues. These metabolites serve as self-indicating markers of cancer metabolism without requiring external labeling agents. The electrochemical sensors directly detect these self-generated signals, eliminating the need for complex labeling procedures and reducing overall method complexity.
2Reliability
If conventional pathology assays are used for cancer detection, then diagnostic information can be obtained, but the process is late-responsive and not suitable for real-time intraoperative detection
Solution Approach 1:
The patent enables continuous real-time monitoring of cancer-related metabolites during surgery. The electrochemical sensors can continuously measure lactate, pyruvate, and H2O2 levels in tissue samples as they are taken during the surgical procedure, providing immediate feedback to guide surgical decisions. This continuous monitoring capability transforms the traditionally batch-processing pathology workflow into a real-time detection system.
Solution Approach 2:
The patent replaces the mechanical and chemical complexity of conventional pathology processing (tissue fixation, sectioning, staining, microscopic examination) with direct electrochemical measurement. By substituting the mechanical pathology workflow with electrochemical sensing, the system achieves rapid results within seconds while maintaining diagnostic reliability through specific detection of cancer metabolism markers.
3Measurement precision
If conventional electrochemical methods with chemically labelled electrodes are used, then pyruvate detection can be achieved, but the methods require expensive labels and complex procedures
Solution Approach 1:
The patent employs disposable, label-free electrochemical sensors that detect pyruvate and other metabolites directly without requiring expensive chemical labels. The sensors use inexpensive electrode materials and detect endogenous metabolites that are naturally present in the tissue, eliminating the need for costly labeling reagents and complex label attachment procedures.
Solution Approach 2:
The patent extracts and removes the labeling component entirely from the detection system. By focusing on direct electrochemical detection of endogenous metabolites through selective sensors, the method eliminates the need for chemical labels, label attachment chemistry, and associated complex procedures, thereby simplifying the overall methodology while maintaining detection accuracy.
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 precise, rapid detection of cancerous tumors in situ, reducing the need for tissue resection and freezing, and providing diagnostic information within seconds, thereby improving surgical precision and reducing false negatives.
Implementation Method 1
measuring hydrogen peroxide (H2O2) oxidation currents
Implementation Method 2
measuring an oxidation current peak of the recorded CV response
Data Source
AI summary
A method for non-invasive detecting and tracing cancer. The method includes fabricating a probe including two reference electrodes, a working electrode located inside a first reference electrode of the two reference electrodes, and a counter electrode located inside a second reference electrode of the two reference electrodes, putting the probe on a part of skin adjacent to a target location inside a patient's body, inserting the two reference electrodes inside the target location through the part of skin, inserting the working electrode and the counter electrode into the target location by releasing the working electrode and the counter electrode through the two reference electrodes, recording a cyclic voltammetry (CV) response of hypoxia-related hydrogen peroxide (H2O2) release in the target location by applying a set of electrical potentials to the probe, measuring an oxidation current peak of the recorded CV response, and detecting a cancerous tumor at the target location by comparing the measured oxidation current peak with a set of reference values.