Sequential Delivery Platforms for Short Lesions and Dissections
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Solution Overview
Problem
Current stent and stent delivery systems are not optimal for treating dissections and very short lesions, and they may not support a high degree of deployed diameter range, necessitating improvements in intraluminal devices and associated delivery devices.
Innovation Solution
A delivery device with unique shaped delivery platforms, including a non-constant outer diameter and hourglass shape, is used to hold intraluminal devices like tacks in a compressed state, featuring radiopaque markers and pusher bands for precise alignment and deployment, along with a post-deployment dilation mechanism to enhance expansion and seating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional stent delivery systems are used, then the system structure is simple, but the system cannot support high degree of deployed diameter range and is not optimal for treating dissections and very short lesions
Solution Approach 1:
The delivery system is divided into multiple delivery platforms, each capable of holding and deploying intraluminal devices at different locations. Each platform can be independently controlled to deploy devices at specific positions along the vessel, enabling precise treatment of dissections and short lesions while supporting a wide range of deployed diameters.
Solution Approach 2:
The delivery system incorporates dynamic elements including expandable delivery platforms that can change shape during deployment, and a controllable expansion mechanism that allows the operator to adjust the deployed diameter range. The system transitions from a compressed delivery state to an expanded treatment state, adapting to different vessel sizes and lesion types.
2Measurement precision
If multiple intraluminal devices are deployed sequentially, then the treatment precision is improved, but the deployment time and procedural complexity increase
Solution Approach 1:
Multiple intraluminal devices are pre-loaded onto the delivery system in a compressed state before entering the vessel. The delivery platforms are prepared in advance with devices positioned at specific locations, allowing for rapid sequential deployment without requiring time-consuming loading procedures during the intervention.
Solution Approach 2:
Multiple delivery platforms are nested within each other or arranged in a compact configuration within the delivery system. This nested arrangement allows multiple devices to be transported through the vasculature in a space-efficient manner and deployed sequentially by expanding the platforms in a controlled manner, reducing procedural time.
3Manufacturing precision
If delivery platforms with unique shapes are used, then the device holding and alignment precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The delivery platforms are designed with asymmetric or unique shapes that provide specific functional advantages for device holding and alignment. These shaped platforms engage with intraluminal devices at predetermined orientations, ensuring precise positioning during deployment. The asymmetric geometry is optimized for the specific application requirements of treating dissections and short lesions.
Data Source
Figure 1A~2
Figure 1B
Figure 3~3A
AI summary
A delivery device can provide sequential delivery of a plurality of intraluminal devices held in a compressed state on the delivery device. Delivery platforms on the delivery device can hold an intraluminal device in a compressed position and be positioned between pusher bands that may also be radiopaque markers. A post deployment dilation device can be included. The post deployment dilation device can be a plurality of expansion filaments, a bellows, or a balloon. An intravascular device deployment method can include allowing a self-expanding intravascular device to expand, aligning the post deployment dilation device under the intravascular device, and causing the post deployment dilation device to expand radially to push outward on the intravascular device.