Implantable Lead Housing Integrity via Detection Substance
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Solution Overview
Problem
Current methods for detecting insulation damage in implantable medical leads are inadequate, as they are not sensitive enough to detect small ruptures and often fail to differentiate between lead insulation damage and other symptoms, leading to potential inappropriate therapy or inhibition.
Innovation Solution
An implantable medical lead with a closed channel filled with a detection substance that leaks out upon rupture, allowing for verification through imaging or presence outside the lead, facilitating early and reliable identification of even minor insulation ruptures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray analysis, IEGM and lead impedance measurements are used to detect lead damages, then some lead damages can be detected, but small lead insulation ruptures cannot be reliably detected and differentiated from other symptoms
Solution Approach 1:
The patent employs a detection substance that changes state or presence upon lead insulation rupture, enabling visual or imaging detection. The detection substance may be radio-opaque for X-ray visibility or color-changing for direct observation, allowing precise detection of small insulation ruptures that conventional electrical methods miss.
Solution Approach 2:
The detection substance acts as an intermediary between the lead insulation and the detection system. It is contained within the lead structure and releases or changes state when insulation ruptures occur, providing a clear signal that mediates between the physical damage and the diagnostic imaging or observation system.
2Reliability
If conventional lead damage detection methods are used, then some damages can be identified, but it is very hard to discriminate between lead insulation damages and other symptoms
Solution Approach 1:
The detection substance provides a specific visual or imaging signal that is distinct from other medical conditions or lead problems. This color change or radio-opaque presence creates a unique diagnostic signature that reliably indicates insulation rupture specifically, differentiating it from other symptoms that conventional electrical measurements cannot distinguish.
Solution Approach 2:
The patent converts the harmful effect of lead insulation rupture into a beneficial diagnostic signal. The rupture that causes clinical problems also triggers the release or detection of the substance, turning the damage event itself into a detectable signal that provides reliable diagnostic information.
3Reliability
If lead damages are detected late, then therapy may be inhibited or inappropriate defibrillation may occur, but early detection methods are not sensitive enough to detect small ruptures
Solution Approach 1:
The detection substance is pre-loaded within the lead structure during manufacturing, positioned to be released upon insulation rupture. This preliminary preparation ensures that when a small rupture occurs, the detection signal is immediately available, enabling early detection before clinical symptoms develop and allowing preventive action.
Solution Approach 2:
The detection substance provides immediate visual or imaging evidence of rupture through color change or radio-opacity, allowing clinicians to detect even small ruptures early in their development. This enables timely intervention before the rupture progresses to cause therapy inhibition or inappropriate defibrillation.
Data Source
AI summary
An implantable medical lead has at least one electric conductor running along a lead body and electrically interconnecting at least one electrode at the distal portion of the lead with at least one lead terminal at the proximal portion of the lead. The lead also has at least one closed channel running along at least a portion of the lead body. The closed channel contains an extracorporeally detectable detection substance. A rupture to the lead will cause the detection substance to leak out of the channel and outside of the lead body. Lead damage can be confirmed by the absence of or a reduced amount of said detection substance inside the lead.