Dual-Iris Stent Compression for Simpler Crimping and Loading
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Solution Overview
Problem
Conventional stent crimping devices are complex and costly due to their intricate arrangements of multiple parts, making the process of sheathing a stent cumbersome and requiring numerous repetitive steps.
Innovation Solution
A device comprising a housing with a first and second threaded member, irises, and a loading funnel, where rotation of the threaded members adjusts the central openings to radially compress a stent, allowing for efficient and simplified stent compression using a monolithic structure with polymeric materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stent crimping devices use complex arrangements of multiple parts, then the compression function is achieved, but the device complexity and cost increase significantly
Solution Approach 1:
The device divides the compression function into two independent irises (first iris with first plurality of arms, second iris with second plurality of arms), each capable of independent operation. This segmentation allows each iris to handle a portion of the stent compression independently, achieving reliable compression while simplifying the overall control mechanism for each segment.
Solution Approach 2:
Each iris structure serves multiple functions: it provides radial compression through its arms, allows independent size adjustment via threaded members, and can operate separately to compress different portions of the stent. This multi-functionality reduces the need for additional specialized components.
2Reliability
If conventional devices require numerous steps to sheath a stent, then complete compression is achieved, but the process time and operational complexity increase
Solution Approach 1:
The two irises can operate simultaneously or in sequence without requiring the device to be repositioned or reconfigured between compression steps. The continuous action is achieved through independent threaded members that allow each iris to be adjusted and compressed in a seamless process, eliminating idle time between steps.
Solution Approach 2:
The device is pre-configured with two irises positioned to handle different portions of the stent simultaneously. This preliminary arrangement eliminates the need for multiple setup phases and allows the compression process to proceed in a single continuous operation.
3Reliability
If conventional crimping devices use complex interactions between many moving parts, then compression is achieved, but the ease of operation decreases
Solution Approach 1:
The operation is segmented into two independent control systems (first threaded member for first iris, second threaded member for second iris), each controlling a separate compression element. This segmentation simplifies the operator's task by allowing independent adjustment of each iris without interfering with the other, making the device easier to operate while maintaining reliable compression.
4Reliability
If conventional devices are designed for single-use, then sterility is ensured, but the cost increases due to repeated disposal
Solution Approach 1:
The device is designed to be reusable rather than disposable. The housing, irises, and threaded members are constructed from durable materials that can withstand sterilization processes and repeated use. This recovery and reuse approach reduces costs while maintaining sterility through proper cleaning and sterilization protocols between uses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides a cost-effective and streamlined method for compressing stents by reducing complexity and the number of components, enhancing operational efficiency and ease of use.
Implementation Method 1
a first threaded member configured to engage the housing... Rotation of the first threaded member relative to the housing changes a size of the first central opening
Implementation Method 2
each of the first plurality of arms includes a first tapered surface configured to engage a first angled surface defining a first central aperture of the first threaded member
Data Source
AI summary
A device for compressing a stent may include a housing extending along a central longitudinal axis, a first threaded member and a second threaded member, a first iris and a second iris, and a compressor element disposed between the second iris and the second threaded member. The first iris includes a first ring extending transverse to the axis and a first plurality of arms extending from the first ring parallel to the axis. The first plurality of arms defines a first central opening and rotation of the first threaded member changes a size of the first central opening. The second iris includes a second ring extending transverse to the axis and a second plurality of arms extending from the second ring parallel to the axis. The second plurality of arms defines a second central opening and rotation of the second threaded member changes a size of the second central opening.