Stent Delivery Device With Offset Flanges
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Solution Overview
Problem
Existing stent delivery devices are cumbersome for deploying relatively long stents, often requiring two hands and are less efficient in deploying stents longer than 100 mm, necessitating a more efficient single-handed operation for effective delivery.
Innovation Solution
A stent delivery device featuring a handle with a grip and sliding body, including a pistol grip and flange portions that allow for ergonomic operation and single-handed deployment of stents up to 100 mm in length, with a sliding mechanism that enables retraction and deployment of stents through a series of flange positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a stent delivery device is designed to deploy relatively long stents (100 mm or more), then the stent delivery capability is improved, but the device becomes more cumbersome and requires two hands to operate
Solution Approach 1:
The delivery device is segmented into distinct functional components: a handle assembly, a sliding body, and a stent holder. The sliding body can move independently along the guide relative to the handle, allowing the operator to control long stent deployment with one hand by sliding the body along the guided channel rather than manipulating the entire device structure.
Solution Approach 2:
A guide structure with a channel acts as an intermediary between the operator's manual input and the stent deployment mechanism. The guide channel constrains and directs the movement of the sliding body, translating simple linear sliding motion into controlled stent advancement and deployment, thereby enabling single-handed operation of devices capable of delivering long stents.
2Length of moving object
If a stent delivery device is designed to deploy relatively long stents (100 mm or more), then the stent delivery capability is improved, but the device complexity increases
Solution Approach 1:
The device is divided into modular segments (handle, sliding body, stent holder) that can be manufactured separately and assembled. Each segment has a specific function, reducing overall design complexity while maintaining the capability to deploy long stents up to 100 mm or more.
Solution Approach 2:
Instead of complex mechanisms to advance the stent, the design inverts the approach by allowing the sliding body to move along a fixed guide channel. This simple linear motion mechanism replaces complex actuation systems, reducing device complexity while maintaining effectiveness for long stent deployment.
3Measurement precision
If a stent delivery device uses a traditional two-handed operation mechanism, then the control precision is improved, but the operational efficiency and speed are reduced
Solution Approach 1:
The sliding body can dynamically move along the guide channel during the deployment process. The operator can adjust the sliding body's position in real-time, allowing for both precise control of stent placement and rapid deployment when needed, thereby achieving both precision and speed in a single-handed operation.
Solution Approach 2:
The sliding mechanism allows for continuous adjustment of the stent holder's position along the guide channel. This continuous motion capability enables the operator to maintain precise control throughout the deployment process while completing the procedure more quickly than discrete, multi-step two-handed mechanisms.
Data Source
AI summary
A stent delivery device has a handle and a sliding body, the sliding body is slidable with respect to the handle. The handle has a grip and a guide. The sliding body has at least two flange portions extending from the sliding body. The flange portions are offset from one another along the length of the sliding body. The operator can thereby deploy a relatively long stent by first gripping the nearest flange portion and pulling the sliding body toward the handle; subsequently, the operator can reposition his/or finger on the next-nearest flange portion and continue deployment of the stent by pulling the sliding body further toward the handle.