PFO Closing Device Using Resorbable Suture and Catheter Clamping
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Solution Overview
Problem
Conventional PFO closing devices using percutaneous catheterization face challenges in securely joining septum primum and septum secundum due to anatomical variations, often resulting in foreign body reactions and potential thrombosis, and require complex procedures with invasive methods.
Innovation Solution
A PFO closing device with a needle part and clamping member mounted in a catheter for easy protrusion and retraction, allowing for precise tissue clamping and energy application to join tissues without leaving foreign materials, using a simple configuration that adapts to individual anatomical differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional disk-like membrane or anchor member is used for closing PFO, then the defect can be closed, but foreign body reactions occur and thrombi are liable to deposit
Solution Approach 1:
The invention extracts and eliminates the foreign body (disk-like membrane or anchor member) from the closure system. Instead of using a permanent implant, the invention uses a resorbable suture that is completely absorbed by the body, removing the source of foreign body reactions and thrombosis while maintaining effective PFO closure through tissue bonding.
Solution Approach 2:
The invention employs a resorbable suture that is designed to be temporary and short-lived in the body. The suture performs its function of closing the PFO during the critical healing period and then is completely broken down and absorbed by the body, eliminating the need for permanent foreign materials that cause adverse reactions.
2Ease of operation
If percutaneous catheterization is used for PFO closure, then the procedure is less invasive, but it is difficult to securely join septum primum and septum secundum due to anatomical variations
Solution Approach 1:
The invention changes the physical and chemical parameters of the joining mechanism. Instead of mechanical clamping that relies on precise positioning, the invention uses a resorbable suture with specific tensile strength and degradation characteristics that adapts to anatomical variations. The suture can be tied with appropriate tension and will maintain closure while healing occurs, regardless of slight variations in septal anatomy.
3Reliability
If open heart surgery with extracorporeal circulation is used, then PFO closure is more assured, but the procedure is highly invasive with significant risks
Solution Approach 1:
The invention extracts and removes the need for extracorporeal circulation and open chest surgery. By using a percutaneous approach with a resorbable suture, the procedure achieves reliable PFO closure without requiring heart-lung machine support or sternotomy, dramatically reducing procedural invasiveness and associated risks while maintaining closure effectiveness.
4Stability of the object's composition
If conventional clamping devices are left indwelling in the patient's body, then the PFO remains closed, but positional deviation may occur and thrombi may deposit
Solution Approach 1:
The invention removes the indwelling foreign body from the system by using a resorbable suture that is temporarily present to achieve closure and then completely disappears after serving its purpose. This eliminates the ongoing risks of thrombosis and positional deviation associated with permanent implants while maintaining closure stability during the critical healing period.
Solution Approach 2:
The invention performs the closure action preliminarily during the procedure using the suture, and the suture is designed to maintain closure stability during the healing process. Once healing is complete, the suture has fulfilled its preliminary function and is absorbed, having provided stable closure without requiring long-term presence in the body.
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 ensures accurate, speedy, and easy closure of PFO by minimizing blood leakage and avoiding foreign body reactions, enhancing safety and reducing procedural complexity.
Implementation Method 1
clamping means having a needle part for puncturing the SP, and a clamping member for cooperating with the needle part in clamping therebetween the tissues including the SP and the SS
Implementation Method 2
energy supplying means for supplying energy for joining the tissues clamped by the needle part and the clamping member
Data Source
Figure 1
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AI summary
The present invention provides a PFO closing device for bringing septum primum and septum secundum into contact and joint with each other. The device includes clamping means and energy supplying means. The clamping means includes a needle part for puncturing the septum primum, and a clamping member for cooperating with the needle part in clamping therebetween the tissues having the septum primum and the septum secundum. The energy supplying means supplies energy for joining the tissues clamped by the needle part and the clamping member. The clamping means is mounted in a catheter so as to be protrudable from and retractable into the catheter.