Suture Loop Closure Device for Vascular Puncture Sealing
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Solution Overview
Problem
Existing vascular closure devices face challenges in effectively sealing punctures due to the risk of the sealing plug entering the artery and incomplete deployment, leading to prolonged bleeding and slower recovery.
Innovation Solution
A tissue puncture closure device with a central shaft and slotted portion, featuring first and second open loop knots, and cannula needles that allow for remote tightening of the suture across the puncture site, enabling secure closure without the need for manual tamping and reducing the risk of the sealing plug entering the artery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing plug is used to close the puncture, then hemostasis can be achieved, but there is a risk of the sealing plug entering the artery and complications may arise
Solution Approach 1:
The patent uses a suture filament as an intermediary mechanism instead of directly deploying a sealing plug into the artery. The suture is passed through the puncture site and tied externally, mediating the closure process without requiring internal plug deployment, thereby eliminating the risk of plug migration into the arterial lumen
Solution Approach 2:
The invention extracts the sealing function from the arterial interior by tying the suture externally outside the artery. Instead of placing a sealing agent inside the vessel, the closure action is taken out and performed externally, removing the harmful possibility of internal plug displacement
2Manufacturing precision
If manual tamping is used to deploy the sealing plug, then the plug can be positioned, but the process is complex and time-consuming
Solution Approach 1:
The patent removes the complex manual tamping and plug deployment process entirely by extracting the sealing function to an external suture-tying operation. The simple act of tying a knot externally replaces the multi-step internal plug deployment, significantly reducing procedural complexity
Solution Approach 2:
The suture filament serves itself by being passed through the puncture and tied externally without requiring separate deployment instruments or manual tamping actions. The system uses its own components (suture and needle) to accomplish the closure function
3Reliability
If the sealing plug is deployed, then puncture closure is achieved, but it may not be deployed close enough to the hole to effectively seal the puncture
Solution Approach 1:
The suture is pre-threaded through the puncture site during the initial procedure, and the ends are brought out externally. This preliminary positioning ensures that when the suture is tied, the closure action occurs immediately at the puncture site, eliminating delays associated with later plug deployment attempts
4Reliability
If a suture is tied across the hole, then secure closure can be achieved, but the puncture is often inaccessible through the incision
Solution Approach 1:
The patent solves the accessibility problem by moving the suture tying operation to a different spatial dimension - from inside the artery to outside the body. The suture passes through the puncture in three-dimensional space, allowing the knot to be tied externally where it is easily accessible, while still achieving secure closure at the inaccessible internal puncture site
Data Source
AI summary
The present invention describes apparatus and methods for tying a filament across subcutaneous punctures. According to some embodiments, the apparatus and methods provide pre-tied knots that are inserted into a bodily lumen. Needles flanking the subcutaneous puncture are inserted into the lumen and grab the pre-tied knots. The pre-tied knots are pulled through tiny holes flanking the subcutaneous puncture by the needles, leaving an internal length of the filament across the subcutaneous puncture. The filament is then externally tied, closing the subcutaneous puncture.