Splittable Delivery Sheath for Cardiac Lead Extraction
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Solution Overview
Problem
Current methods for removing cardiac leads from the coronary sinus during procedures often result in lead dislodgment and increased procedure time, leading to potential complications such as infections and prolonged anesthesia exposure.
Innovation Solution
A splittable delivery sheath designed to split from the distal end, featuring a longitudinal split with staggered segments and a release wire, allowing for controlled extraction without disrupting the implanted lead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the delivery sheath is removed using traditional splitting methods from the proximal end, then the sheath can be extracted from the body, but the lead may be dislodged or disrupted during the extraction process
Solution Approach 1:
The patent inverts the traditional splitting approach by initiating the split from the distal end (inside the body) rather than the proximal end (outside the body). This reversal allows the sheath to open away from the lead, preventing lead dislodgment during extraction while maintaining ease of sheath removal
2Productivity
If the delivery sheath is split and removed using current techniques, then the sheath can be extracted, but the procedure time increases and complications may occur
Solution Approach 1:
The patent incorporates a preliminary action by pre-configuring the sheath with a distal split and release mechanism that enables controlled opening. This preliminary design allows the sheath to self-open during extraction without requiring complex external tools or manual manipulation, thereby reducing procedure time and minimizing complications
Data Source
AI summary
A delivery sheath is provided that that can be used to deliver a therapeutic device to the heart without dislodging the device when the delivery sheath is removed. The delivery sheath comprises a tubular body having a proximal end, a distal end, and a lumen. The therapeutic device is delivered through the lumen. A slit is provided along the length of the tubular body creating two opposing edges along the length of the tubular body. A guide wire engages along an entire length of the slit and closing the two opposing edges to form the lumen. The slit is opened from the distal end of the tubular body toward the proximal end of the tubular body by pulling on the guide wire at the proximal end, whereby the lumen expands and separates from the therapeutic device facilitating the extraction of the delivery sheath without disruption to the implanted device.