Vascular Access Closure With Parallel Deployable Anchors
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Solution Overview
Problem
Current methods for closing vascular access sites after percutaneous procedures are time-consuming and prone to complications such as hematoma or thrombosis, particularly in the presence of vascular diseases like atherosclerosis and calcification, with suture-mediated closure devices having high failure rates.
Innovation Solution
A vascular closure device with an elongate housing and deployable anchor deployers that secure to tissue layers, allowing for mechanical closure of access holes through deployment and retraction of anchors, followed by application of a tissue grip mechanism to secure the tissue layers together, optionally using biocompatible adhesives or self-contracting lock rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If suture-mediated closure devices are used, then vascular access can be closed, but the procedure becomes time-consuming and has high failure rates in the presence of atherosclerosis and calcification
Solution Approach 1:
The closure device is divided into multiple independent anchor deployers that can be deployed simultaneously at different positions around the vascular access site. Each anchor deployer operates independently but contributes to the overall closure, allowing parallel processing of closure tasks and reducing total procedure time while maintaining high reliability through distributed anchoring points
Solution Approach 2:
The anchor deployers are pre-configured within the housing in a compact, ready-to-deploy state. The anchors are positioned and oriented in advance during device assembly, so that upon deployment they immediately engage with the tissue layer without requiring additional positioning steps or adjustment during the closure procedure
2Reliability
If traditional closure methods are used, then vascular access can be closed, but complications such as hematoma and thrombosis occur
Solution Approach 1:
The device replaces traditional suture-mediated mechanical closure with a deployable anchor system that creates tissue approximation through controlled mechanical deployment and retraction. The anchors are retrieved through the vascular access site in a controlled manner, eliminating the need for prolonged compression or complex suturing that can cause hematoma and thrombosis
Solution Approach 2:
The anchor deployers are designed to self-position and self-engage with the tissue layer through their resilient configuration and geometric shape. The deployment rods automatically guide the anchors into optimal positions, and the system self-adjusts to accommodate variations in tissue anatomy, reducing the need for operator intervention that can introduce complications
3Productivity
If multiple anchor deployers are deployed simultaneously, then closure speed increases, but device complexity increases
Solution Approach 1:
Multiple anchor deployers are integrated into a single housing structure with shared deployment mechanisms. The housing provides a common platform for mounting multiple deployers, and a single actuation system can deploy all anchors simultaneously or independently as needed, achieving high closure speed without proportionally increasing overall device complexity
Solution Approach 2:
The housing and deployment mechanism serve multiple functions: they provide structural support for the anchors, enable controlled deployment of multiple anchors, facilitate retrieval of the anchors, and maintain alignment during the closure process. This multi-functionality reduces the need for separate components for each function, thereby reducing overall device complexity while maintaining high productivity
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
Facilitates rapid and effective closure of vascular access sites with reduced complications, suitable for large holes and various tissue types, providing a robust and easy-to-use solution for minimizing blood leakage.
Implementation Method 1
Each of the anchor deployers may include a deployment rod which is slidably disposed relative to the housing and which includes an elongate resilient configuration
Implementation Method 2
The lock ring may be allowed to self-contract to a relaxed constrained state
Data Source
AI summary
Device and method embodiments discussed herein are directed to mechanical closure of an access passage in a tissue layer adjacent to an access hole in a vessel such as an artery or vein of a patient. Some of these embodiments may also be applicable to direct closure of a vessel wall in some instances.