Medical Device Release System With Segmented Securement Member
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Solution Overview
Problem
There is a need for alternative medical devices and methods for manufacturing and using intracorporeal medical devices, such as guidewires, catheters, and medical device delivery systems, to improve the release and deployment of medical implants at treatment sites within the body.
Innovation Solution
A medical device system comprising an elongate shaft with a lumen, a release wire for attaching a medical device to the distal end, and a securement member that allows for the axial translation of the release wire relative to the shaft, enabling the securement member to disengage and release the medical device at the treatment site, facilitated by a microcatheter for precise delivery and deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a securement member is used to固定 the release wire to the elongate shaft, then the medical device can be securely attached during delivery, but the release mechanism becomes more complex requiring additional components to disengage
Solution Approach 1:
The securement member is divided into a proximal portion and a distal portion that can disengage from each other. The distal portion remains attached to the elongate shaft while the proximal portion can be separated to allow release wire translation, enabling controlled release without requiring complete disassembly of the securement member
Solution Approach 2:
The securement member transitions from a static fixed state to a dynamic disengaged state. The proximal portion is configured to disengage from the distal portion in response to translation of the release wire, allowing the system to adapt between secure attachment and release modes
2Reliability
If the release wire is fixedly attached along its entire length, then the medical device remains securely attached, but the release wire cannot translate axially to enable device release
Solution Approach 1:
The attachment relationship is segmented into two zones: a first portion of the release wire that remains fixedly attached to the elongate shaft for securement, and a second portion that can translate axially relative to the shaft to enable release when the proximal securement portion disengages
Solution Approach 2:
The securement member acts as an intermediary between the fixed attachment requirement and the translation requirement. It provides a controlled path for release wire translation while maintaining attachment security during the delivery phase
3Ease of operation
If the proximal portion of the securement member is disengaged from the distal portion, then the release wire can translate to release the medical device, but the structural integrity of the securement member is compromised
Solution Approach 1:
The securement member is designed as separable components (proximal and distal portions) that can disengage without compromising the overall system. The distal portion remains firmly attached to the elongate shaft, maintaining structural integrity at the critical attachment point while allowing proximal separation for release functionality
Data Source
AI summary
A medical device system may include an elongate shaft having a lumen extending from a proximal end of the elongate shaft to a distal end of the elongate shaft, a medical device disposed proximate the distal end of the elongate shaft, a release wire disposed within the lumen of the elongate shaft, wherein the release wire releasably secures the medical device to the distal end of the elongate shaft, a securement member fixedly attached to the proximal end of the elongate shaft and to a proximal end of the release wire, and a microcatheter configured to deliver the medical device to a treatment site, the elongate shaft and the medical device being slidably disposed within a lumen of the microcatheter. A proximal portion of the securement member may be configured to disengage from a distal portion of the securement member.