Catheter Introducer Sheath Electrode Impedance Bleeding Detection
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Solution Overview
Problem
Current medical procedures face challenges in early detection of pericardial or retroperitoneal bleeding, which can lead to life-threatening complications such as cardiac tamponade or hemotoma formation, often only recognized after symptoms like hypotension appear, delaying timely intervention.
Innovation Solution
A catheter introducer sheathe equipped with electrodes to measure impedance and conduction velocity, allowing for real-time detection of fluid accumulation by analyzing changes in electrical current resistance or conduction time, enabling early recognition of bleeding or clot formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional monitoring methods are used, then device complexity remains low, but detection timing is delayed until symptoms appear
Solution Approach 1:
The patent replaces traditional mechanical/clinical monitoring methods with an electrical impedance-based detection system. The sheath incorporates electrodes that measure impedance changes in real-time, substituting the need for continuous clinical observation and manual assessment with an automated electrical measurement system that can detect bleeding early before symptoms manifest.
Solution Approach 2:
The sheath performs self-monitoring by incorporating impedance measurement capability directly into the device structure. The electrodes within the sheath automatically detect fluid accumulation and transmit signals without requiring external monitoring equipment or manual intervention, enabling the device to monitor itself and alert operators to bleeding events.
2Reliability
If impedance measurement is implemented, then early detection capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the impedance measurement function directly into the sheath structure by integrating electrodes into the sheath wall. This combination of the sheath and monitoring function into a single unified device eliminates the need for separate external monitoring systems, thereby improving detection reliability while limiting the increase in overall device complexity to only the sheath component itself.
3Loss of time
If real-time monitoring is implemented, then intervention timing is improved, but energy consumption increases
Solution Approach 1:
The impedance measurement system operates by periodically measuring impedance values at intervals rather than continuously. This periodic sampling approach enables real-time detection capability while significantly reducing energy consumption compared to continuous monitoring, as the measurement function is activated only at discrete time points to assess for bleeding events.
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 rapid detection of bleeding or clot formation, allowing for timely intervention to prevent complications like cardiac tamponade or hemotoma, improving patient outcomes by aborting procedures or reversing anticoagulation.
Implementation Method 1
measuring impedance to detect the presence of fluid (e.g., blood) bleeding such as pericardial effusion, retroperitoneal effusion, etc.
Implementation Method 2
measuring impedance or conduction velocity between the first electrode on the sheathe and the second electrode
Data Source
AI summary
An apparatus comprises a sheathe for introducing a catheter into a blood vessel, a first electrode provided on the sheathe, a second electrode; and a measuring device to which the first and second electrodes are coupled. The measuring device measures the impedance or conduction velocity between the first electrode on the sheathe and the second electrode.