Conductive-Fluid Detector for Catheter Safety
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Solution Overview
Problem
Medical ablation systems face challenges in detecting conductive fluids, such as blood, within non-conductive environments during procedures, which can lead to undesirable fluid exchanges and breaches in medical devices.
Innovation Solution
Incorporating a conductive-fluid detector with electrodes and a fluid pathway in medical devices, such as catheters, to monitor electrical parameters and detect the presence of conductive fluids, triggering alerts or adjusting coolant flow to prevent breaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a catheter-based medical device is used for ablation procedures, then therapeutic lesions can be formed on patient tissue, but conductive fluids such as blood may enter non-conductive environments within the device, causing harmful fluid exchanges and breaches
Solution Approach 1:
The conductive fluid detector is integrated into the catheter system before the procedure begins, with electrodes positioned within the coolant pathway to detect conductive fluids in advance. The system continuously monitors electrical conductivity during the ablation procedure, enabling early detection of blood or other conductive fluids entering the non-conductive coolant environment, allowing preventive action before harmful fluid exchanges occur
Solution Approach 2:
The detector provides real-time feedback about the presence of conductive fluids in the coolant pathway. When the detector identifies a change in electrical conductivity indicating conductive fluid intrusion, it triggers an alert to the operator and can automatically adjust coolant flow or power down the ablation element, creating a closed-loop safety system that responds dynamically to changing conditions
2Reliability
If coolant flow is reduced or stopped to prevent fluid breaches, then device safety is improved, but the ability to form effective thermal lesions is compromised
Solution Approach 1:
The system uses real-time conductivity monitoring to provide feedback that distinguishes between safe and unsafe conditions. When conductive fluid is detected, the system automatically modulates coolant flow or terminates ablation power, creating a dynamic balance between safety and efficacy that responds to actual procedural conditions rather than using fixed conservative settings
Solution Approach 2:
The detector enables preliminary anti-action by detecting conductive fluids before they can cause harmful fluid exchanges or device breaches. By identifying the presence of blood or other conductive fluids in advance, the system can take preventive measures such as adjusting coolant flow or power levels before actual harm occurs, maintaining ablation efficacy while preventing safety issues
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
Effectively detects conductive fluids, preventing fluid breaches and ensuring safe operation by reducing coolant flow or powering down the system when conductive fluids are detected, thereby maintaining device integrity and procedure safety.
Implementation Method 1
The conductive-fluid detector is coupled to the at least one lumen and is configured and arranged to detect when a second fluid is disposed within the at least one lumen that is more conductive than the first fluid
Data Source
AI summary
A catheter-based medical device includes a catheter that is configured and arranged for at least partial insertion into a patient and that defines at least one lumen that is configured and arranged to receive a first fluid. A conductive-fluid detector is coupled to the at least one lumen and is configured and arranged to detect when a second fluid is disposed within the at least one lumen that is more conductive than the first fluid. The conductive-fluid detector includes a plurality of axially-positioned bodies, each body defining a lumen. The lumens of the axially-positioned bodies are aligned to form a shared lumen in fluid communication with the at least one lumen of the catheter. Spaced apart electrodes are disposed within the shared lumen.