Vaso-Occlusive Electrolytic Detachment Detection With Adaptive Timing
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Solution Overview
Problem
Existing electrolytic detachment devices for vaso-occlusive coils in medical procedures face challenges with inconsistent detachment times due to varying environmental conditions, leading to extended procedures and increased false positive detections, which prolong fluoroscopic confirmations and complicate the detachment process.
Innovation Solution
An electrolytic detachment device with a controller that adjusts electrolytic detachment cycles based on elapsed time and electrical parameter analysis, including fixed and variable time periods, automatic reset mechanisms, and incremental threshold adjustments to minimize false positives and optimize detachment efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrolytic detachment devices use fixed time periods for detachment cycles, then the procedure structure is simple and easy to operate, but detachment times become inconsistent due to varying environmental conditions leading to extended procedures and false positive detections
Solution Approach 1:
The system dynamically adjusts the detachment cycle timing by switching between fixed and variable time periods based on detected detachment indicators. The controller monitors electrical parameters and environmental conditions in real-time, extending the cycle from a base fixed period by a variable period when detachment is detected, thereby adapting to varying environmental conditions while maintaining operational simplicity.
Solution Approach 2:
The system incorporates feedback mechanisms by monitoring electrical parameters (such as impedance changes) and environmental conditions during the detachment process. The controller uses this feedback to determine when to extend the detachment cycle and to distinguish true detachment events from false positives, improving detection accuracy while maintaining procedural efficiency.
2Reliability
If electrolytic detachment devices extend detachment cycles to account for varying environmental conditions, then detachment detection accuracy improves, but false positive detections increase and procedure time extends
Solution Approach 1:
The system applies partial extension to the detachment cycle rather than uniformly extending it. The controller extends the cycle by a variable period only when detachment indicators are detected, rather than extending all cycles to a maximum duration. This partial action approach maintains detection accuracy while minimizing unnecessary procedure time extension.
Solution Approach 2:
The system uses periodic monitoring of electrical parameters and environmental conditions during the detachment cycle. The controller checks for detachment indicators at specific intervals and extends the cycle only when necessary, rather than continuously monitoring and extending. This periodic approach balances detection accuracy with procedure efficiency.
3Measurement precision
If electrolytic detachment devices perform multiple detachment cycles with fluoroscopic confirmations, then detachment accuracy is verified, but the number of cycles increases and overall procedure time extends
Solution Approach 1:
The system replaces fluoroscopic confirmation (a mechanical/imaging system) with electrical parameter monitoring and analysis. The controller detects detachment events by monitoring changes in electrical impedance and other electrical parameters, eliminating the need for repeated fluoroscopic images. This substitution maintains verification accuracy while significantly improving procedure efficiency by reducing radiation exposure and procedure time.
Solution Approach 2:
The system enables self-verification of detachment by using the electrical parameters inherent to the detachment process itself. The controller analyzes impedance changes and other electrical indicators that naturally occur during electrolytic detachment, allowing the system to verify detachment without external imaging confirmation. This self-service approach maintains measurement precision while eliminating the time loss associated with fluoroscopic confirmations.
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
The device reduces the number of detachment cycles and fluoroscopic confirmations, ensuring accurate detection and prompt corrective actions, thereby enhancing procedural efficiency and reducing overall procedure time.
Implementation Method 1
delivering electrical current to the electrolytically severable joint of the vaso-occlusive assembly, such that the vaso-occlusive device electrolytically detaches from the delivery wire
Data Source
AI summary
An electrolytic detachment device for use with a delivery wire attached to a vaso-occlusive device via an electrolytically severable joint. The detachment device is configured for assessing if a successful electrolytic detachment event has occurred based on electrical parameter information, and resetting the electrical parameter information if the measured elapsed time reaches an elapsed time threshold. The detachment device is also configured for assessing if the successful electrolytic detachment event has occurred during a fixed time period of an electrolytic detachment cycle based on the generated electrical parameter information, and extending the electrolytic detachment cycle only if the successful electrolytic detachment event has been assessed to have not occurred during the fixed time period. The detachment device is also configured for incrementally increasing an electrolytic work threshold to which measured electrolytic work can be compared to assess if the electrolytic detachment event has occurred.