Three Suture Vascular Closure Device Anchor Mechanism
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Solution Overview
Problem
Existing vascular closure devices are complex, difficult to use, and often enlarge the vessel opening, negating the benefits of less invasive procedures, while there is a need for a simple and effective method to approximate tissue surrounding a vessel wall opening.
Innovation Solution
A vascular closure device featuring an anchor, a suture carrying portion, and multiple needles that can be advanced through the vessel wall to connect with sutures and retract them through the wall for secure closure, allowing for easy tissue approximation and closure of vessel punctures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior closure devices are used to close the vessel opening, then the hole can be closed, but the device complexity increases and the vessel opening is enlarged
Solution Approach 1:
The closure device is divided into distinct functional components: an anchor component for securing to the vessel wall, a suture component for tissue approximation, and a delivery component for needle insertion. This segmentation allows each component to perform its specific function efficiently while reducing overall device complexity.
Solution Approach 2:
The needles are positioned within lumens of the delivery catheter, and the suture is threaded through the needles and anchored within the device structure. This nested arrangement allows all components to be delivered through a single percutaneous access point without requiring multiple separate devices.
2Reliability
If prior closure devices are used to close the vessel opening, then the hole can be closed, but the procedure becomes difficult to perform
Solution Approach 1:
The anchor component is deployed and secured to the vessel wall before suture placement. The needles are pre-positioned within the delivery catheter lumens, and the suture is pre-threaded through the needles. This preliminary arrangement simplifies the actual closure procedure, requiring only straightforward advancement and deployment actions by the physician.
3Object-affected harmful factors
If smaller percutaneous products are used, then less invasive benefits are achieved, but the vessel opening cannot be effectively closed
Solution Approach 1:
The entire closure system including multiple needles, suture, and anchor is nested within a single delivery catheter that can be introduced through a small percutaneous access point. This allows the benefits of minimally invasive access to be maintained while delivering a comprehensive closure mechanism.
Solution Approach 2:
The closure function is segmented into discrete components delivered through the small access point, with the anchor providing secure attachment, the needles providing suture placement, and the suture providing tissue approximation. This segmentation enables effective closure through minimal access.
Data Source
AI summary
A vascular closure device includes an anchor, a suture carrying portion, and at least three needles. The anchor is positionable through a vessel puncture in a vessel wall and operable between expanded and retracted positions. The suture carrying portion is positioned distal of the anchor and configured to carry at least one suture. The needles are operable between an advanced position extending through the vessel wall adjacent to the vessel puncture to connect to the at least one suture, and a retracted position in which the needles position the at least one suture through the vessel wall. The needles and sutures are configurable to close large bore openings in the vessel wall.