Dynamic Vascular Access Closure With Suture Cinching for Repeat Access
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Solution Overview
Problem
Existing vascular closure devices are inadequate for large bore access procedures, leading to bleeding risks and requiring manual intervention, and they often necessitate new access sites for repeat procedures, undermining the minimally-invasive nature of interventional procedures.
Innovation Solution
A dynamic vascular access and closure device featuring a tensioning tube with resilient members and sutures that automatically cinch and close the access site, using nitinol anchors and suture locks to facilitate multiple access without manual intervention, suitable for large bore catheters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing vascular closure devices are used for large bore access, then the access site can be closed, but bleeding control is inadequate and manual intervention is required
Solution Approach 1:
The closure device incorporates a resilient member (spring) that automatically cinches the sutures to close the access site without manual intervention. The device self-actuates upon deployment, using the elastic recovery of the resilient member to pull the sutures and close the vessel puncture site, eliminating the need for continuous manual compression or intervention.
Solution Approach 2:
The sutures are pre-positioned around the access site before the procedure, and the resilient member is pre-loaded in the compressed state. When deployed, the pre-positioned sutures and pre-loaded spring work together to immediately close the site, providing preliminary preparation that enables automatic closure without requiring manual action during the procedure.
2Adaptability or versatility
If existing closure devices are used, then single access can be closed, but repeated access requires new access sites
Solution Approach 1:
The closure device is designed with a dynamic tensioning mechanism where the resilient member can be compressed to open the access site and released to close it. This dynamic operation allows the same access site to be opened and closed multiple times throughout the procedure, enabling repeated catheter exchanges or device interventions without creating new access sites.
Solution Approach 2:
The device serves multiple functions: it provides initial access site closure, enables repeated access during the procedure, and maintains hemostasis throughout. The same device structure and mechanism handle both single and multiple access events, making it universally applicable to various procedural needs without requiring additional devices or access sites.
3Object-affected harmful factors
If manual intervention is used for access site management, then bleeding can be controlled temporarily, but resource use increases and minimally-invasive aspect is undermined
Solution Approach 1:
The device automatically prevents bleeding through the self-actuating resilient member that cinches the sutures upon deployment. This eliminates the need for manual compression balloons, continuous physician monitoring, or additional hemostatic agents, thereby reducing resource consumption while maintaining effective bleeding prevention.
Solution Approach 2:
The invention replaces manual mechanical compression (physician-applied pressure) with an automated elastic mechanical system (spring-loaded suture cinching mechanism). This substitution eliminates the need for ongoing manual intervention and associated resources while providing more consistent and reliable hemostasis.
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 automated hemostasis and repeated access, reducing bleeding and resource use, while maintaining the minimally-invasive aspect of procedures, even in calcified vessels.
Implementation Method 1
a resilient member disposed within the tensioning tube; movement of that suture causes compression or extension of the resilient member within the tensioning tube
Implementation Method 2
The resilient member can comprise a spring
Implementation Method 3
using nitinol anchors
Data Source
AI summary
The disclosure provides a dynamic vascular access and closure device for radial cinching of an access site. The device includes a tensioning tube, a resilient member disposed within the tensioning tube, and a plurality of sutures extending axially between a distal end of the tensioning tube and a proximal end of the tensioning tube. A proximal end of each of the plurality of sutures can be configured to attach to the resilient member such that movement of that suture causes compression or extension of the resilient member within the tensioning tube to provide cinching to the sutures.