Vascular Closure Grasping Member with Radial Fingers
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Solution Overview
Problem
Current methods for closing vascular access sites after minimally invasive procedures are inefficient, often requiring prolonged patient immobilization and risk of clot formation, especially with manual pressure or suture-based closure techniques which can be challenging in limited access surgeries.
Innovation Solution
A device comprising a grasping member with radially expandable fingers and a sheath that collapses to gather tissue around the access site, allowing for rapid and minimally invasive closure without piercing the vessel wall, using biocompatible materials and optional features like teeth and grooves for secure grasping, and an anchor member for enhanced closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If manual pressure is applied to close the vascular access site, then blood loss is minimized, but procedure time increases significantly and patient mobility is restricted
Solution Approach 1:
The closure device utilizes the patient's own vascular tissue to achieve closure. The grasping member captures and compresses the puncture site using forces generated by the device itself, eliminating the need for prolonged manual pressure application by medical personnel while maintaining hemostasis effectiveness
Solution Approach 2:
The invention replaces the manual mechanical compression method with a device-based mechanical system. The grasping member with compressible elements provides controlled mechanical force to close the puncture site, substituting the need for manual pressure application and extending arm limitations
2Reliability
If sutures are used to close larger vascular access sites, then closure effectiveness is improved, but surgical skill requirement and procedure complexity increase
Solution Approach 1:
The closure device performs the closure function autonomously without requiring surgical suturing skills. The grasping member automatically captures and compresses the puncture site, eliminating the need for physicians to perform complex suture techniques while maintaining reliable closure effectiveness
Solution Approach 2:
The invention extracts the complex suture technique requirement from the closure process and replaces it with a simpler device-based compression mechanism. The grasping member with its compressible elements performs the closure function that previously required skilled suturing, separating the closure function from surgical skill dependency
3Stability of the object's composition
If the grasping member is made more rigid for stable tissue grasping, then grasping stability is improved, but trauma to the vessel wall increases
Solution Approach 1:
The compressible elements of the grasping member change their mechanical parameters dynamically. They provide rigid structural support for stable grasping when needed, but can compress or deform to accommodate and protect the vessel wall, adjusting their mechanical properties to balance stability with tissue protection
Solution Approach 2:
The grasping member utilizes composite construction with elements that combine rigidity for stable grasping with compliant features for tissue protection. The compressible elements may incorporate materials or structures that provide both structural integrity and gentle contact with the vessel wall, reducing trauma while maintaining grasping stability
Data Source
AI summary
A device for closure of an opening formed in a body vessel includes a grasping member and a sheath movable thereover. The grasping member comprises a tubular body having a plurality of grasping fingers extending from a distal end of the tubular body. The fingers radially extend from the tubular body at a first angle, and are collapsible therefrom to a second angle. The fingers have a distal tip configured for grasping an outer wall of the body vessel surrounding the vessel opening when the fingers are at the first angle. The sheath is slidable over the tubular body and at least a portion of the grasping fingers for collapsing the fingers from the first angle to the second angle, thereby causing the collapsed fingers to at least substantially close the opening.