Expandable Device Delivery with Notch Securing
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Solution Overview
Problem
Existing devices for occluding flow in luminal structures face challenges with inaccurate positioning, inability to reposition, and difficulty in removal, leading to continuous and significant residual flow.
Innovation Solution
A device comprising a carrier member with notches and an elongate member that secures and releases an expandable member within the luminal structure, allowing for axial movement to control the expansion and retraction of the device for precise occlusion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device is placed in a luminal structure to occlude flow, then flow reduction is achieved, but the device cannot be repositioned or removed
Solution Approach 1:
The device transitions from a static, fixed configuration to a dynamic, reconfigurable system. The expandable member can be deployed and retrieved by manipulating the elongate member, allowing the device to adapt between occlusion and removal states while maintaining reliable flow blockage when deployed.
Solution Approach 2:
The device is divided into separable components: the expandable member, the carrier member, and the elongate member. This segmentation allows the expandable member to be independently deployed and retrieved, providing both reliable occlusion during deployment and flexibility for repositioning or removal afterward.
2Reliability
If a device is placed in a luminal structure to occlude flow, then flow reduction is achieved, but the device cannot be removed
Solution Approach 1:
The device incorporates a dynamic retrieval mechanism where the elongate member can be manipulated to collapse and retrieve the expandable member from the luminal structure. This maintains reliable occlusion during use while enabling straightforward removal when needed.
Solution Approach 2:
The elongate member serves as an intermediary tool that facilitates both deployment and retrieval of the expandable member. By manipulating the elongate member, operators can control the expansion and subsequent collapse of the expandable member, enabling reliable occlusion and easy removal.
3Measurement precision
If the elongate member extends through the carrier lumen to secure the expandable member, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The elongate member performs multiple functions: it acts as a positioning guide during deployment, secures the expandable member in place, and enables retrieval by collapsing the expandable member. This multi-functionality achieves positioning accuracy without proportionally increasing device complexity.
Solution Approach 2:
The elongate member and carrier member are integrated into a unified delivery system where the elongate member extends through the carrier lumen to coordinate both positioning and securing of the expandable member. This merging of functions achieves precise positioning while minimizing the number of separate components needed.
Data Source
AI summary
A device for delivering an expandable member to a luminal structure in a patient is described. In some embodiments, the device has a carrier member, with a carrier lumen extending at least partially therethrough. The device can have an elongate member that extends through the carrier lumen across a first notch in the carrier member. The device can have an expandable member that expands within and engages the luminal structure, can be carried by the carrier member, and has a first portion that fits within the first notch. When the elongate member extends through the carrier lumen and across the first notch, the elongate member secures the first portion to the carrier member. The elongate member is configured to move axially through the carrier lumen such that the elongate member permits release of the first portion from the carrier member and expansion of at least part of the expandable member.