Implantable Medical Lead Visible Indicator Alignment
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Solution Overview
Problem
Existing medical lead implantation techniques face challenges in accurately navigating and orienting distal portions of implantable medical leads to target sites within the body, particularly in inaccessible areas, often requiring imaging tools that increase radiation exposure and complexity during procedures.
Innovation Solution
Incorporating a visible indicator on the medical lead between the distal and proximal portions, which is aligned with an orientation region on the introducer sheath to indicate radial and longitudinal orientation, allowing clinicians to properly position the lead without fluoroscopy, thereby simplifying the implantation process and reducing radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If imaging tools (fluoroscopy) are used to navigate and orient the distal portion of the lead to the target site, then placement accuracy is improved, but radiation exposure and procedural complexity increase
Solution Approach 1:
The patent applies color coding through visible indicators (e.g., colored bands, markers, or patterns) on the lead shaft that correspond to specific radial and longitudinal positions. These color indicators are visible through the introducer sheath or external to the patient, allowing real-time visual tracking of lead orientation and position during implantation without requiring fluoroscopy, thus eliminating radiation exposure while maintaining placement accuracy.
2Measurement precision
If imaging tools (fluoroscopy) are used to navigate and orient the distal portion of the lead to the target site, then placement accuracy is improved, but procedural complexity increases
Solution Approach 1:
The lead incorporates self-indicating features such as visible markers, colored bands, or patterned shafts that automatically provide orientation information during implantation. The lead design includes an indicator at a predetermined location that visually indicates the radial and longitudinal orientation of the distal portion relative to the target site, allowing the lead to 'tell' the operator its own position and orientation without external imaging assistance, thereby simplifying the procedure.
Solution Approach 2:
The patent introduces an intermediary visual indicator system (colored bands, markers, or patterns on the lead shaft) that serves as a mediator between the operator and the lead's internal configuration. This intermediary provides real-time visual feedback about lead orientation and position through the introducer sheath or externally, eliminating the need for fluoroscopy and simplifying the implantation procedure while maintaining accuracy.
3Ease of operation
If visible indicators are added to the lead shaft, then ease of operation during implantation is improved, but device complexity increases
Solution Approach 1:
The lead shaft is segmented with discrete visible indicators (such as colored bands, rings, or markers) at specific predetermined locations along its length. These segmented indicators correspond to specific radial and longitudinal positions, providing discrete orientation information that is easy to interpret during implantation. The segmentation approach adds operational guidance without requiring complex continuous indication systems.
Data Source
AI summary
An implantable medical lead may include an electrode at a distal portion of the lead that is configured to monitor or provide therapy to a target site. The lead may include a visible indicator that is visible to the naked eye of a clinician at a medial portion of the lead that is configured to indicate when the electrodes of the lead are longitudinally and radially aligned properly to monitor or treat the target site. A clinician may insert the lead into the patient using an introducer sheath inserted to a predetermined depth into the patient and subsequently aligning the distal portion of the lead by orienting the indicator at an entry port of the introducer sheath.