Tissue Closure Device with Deformable Anchor and Thread Locking
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Solution Overview
Problem
Existing devices for closing blood vessel punctures after medical procedures face challenges due to varying blood vessel thickness, calcification, and fibrosis, requiring manual pressure application and risk of ring displacement, with existing solutions involving complex thread securing and cutting procedures.
Innovation Solution
A tissue closure device featuring a plate-shaped anchor and deformable frame with a thread system that maintains desired forms, allowing for adjustable deformation to accommodate different vessel conditions, eliminating the need for manual pressure and thread cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring locking member is used to close the blood vessel, then the hole can be closed, but the ring may drop into the blood vessel through the hole due to its small size
Solution Approach 1:
The device is divided into distinct functional segments: a closing member with thread for engagement, a separate locking member (ring) for securing, and a cutting member for thread termination. This segmentation allows each component to perform its specific function optimally while reducing the risk of displacement through proper sequential deployment.
Solution Approach 2:
The closing member is inserted and positioned through the blood vessel hole first, establishing the foundation for closure. The locking member is then applied to secure the thread, and finally the thread is cut. This preliminary sequencing of actions ensures that each step is performed under optimal conditions, preventing ring displacement.
2Ease of operation
If the ring is made small to fit through the wound hole, then insertion is possible, but the ring may drop into the blood vessel
Solution Approach 1:
The closing member with its thread is inserted through the blood vessel hole first, creating a secure anchor point. Only after this preliminary action is complete is the locking member applied to the thread, ensuring the ring remains retained through proper engagement rather than relying solely on size constraints.
3Reliability
If manual pressure is applied to stanch bleeding, then hemostasis can be achieved, but the procedure requires continuous operator intervention for extended periods
Solution Approach 1:
The device enables self-service hemostasis by mechanically closing the blood vessel hole through the interaction of the closing member and locking member. Once deployed, the system maintains closure autonomously without requiring continuous operator pressure application, allowing the procedure to complete independently.
Solution Approach 2:
Manual mechanical pressure application by the operator is replaced with a deployed mechanical closure system consisting of the closing member and locking member. This substitution automates the hemostasis function, eliminating the need for sustained manual intervention while maintaining effective bleeding control.
4Reliability
If a thread securing system is used, then the closing member can be secured, but complex operations of securing and cutting thread within subcutaneous tissues are required
Solution Approach 1:
The thread management function is segmented into distinct operations: the locking member secures the thread through engagement, and a separate cutting member terminates the thread. This segmentation organizes the complex thread management into manageable, sequential steps, reducing overall procedure complexity while maintaining secure closing member attachment.
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 reliable and efficient closure of blood vessel punctures across varying conditions, ensuring effective hemostasis without manual pressure and simplifying the procedure by maintaining deformation through a thread system, reducing the risk of device displacement.
Implementation Method 1
a deformation portion deformable between a first form in which the body is elongated in a direction substantially perpendicular to the anchor portion and contracted in a direction substantially parallel to the anchor portion and a second form in which the body is contracted in a direction substantially perpendicular to the anchor portion and elongated in a direction substantially parallel to the anchor portion
Data Source
AI summary
A tissue closure includes a body, and a thread includes a knot which is slidable on the thread. The body is composed of a plate-like anchor portion, and a deformation portion having a frame-like shape which can be deformed between a first form in which the deformation portion is elongated in a direction substantially perpendicular to the anchor portion and contracted in a direction substantially parallel to the anchor portion and a second form in which the deformation portion is contracted in a direction substantially perpendicular to the anchor portion and elongated in a direction substantially parallel to the anchor portion. The tissue closure can also include a connecting portion connecting the anchor portion and the deformation portion to each other. In the condition where the deformation portion is in a desired form between the first form and the second form, the condition is maintained by the thread.