Elastic Suture Hook for Endoscopic Knot Formation
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Solution Overview
Problem
Endoscopic surgeries face increased difficulty in suturing or ligating tissues due to the need to manipulate sutures or suture needles with long forceps, particularly in forming secure knots, which can lead to complications if loosened.
Innovation Solution
A tissue ligating device featuring a suture with elastic restoring force and a hook-shaped member with a groove portion, designed to facilitate knot formation by utilizing the suture's elastic properties to keep the hook-shaped member separated from the tissue, allowing easy engagement and fixation of the suture within the groove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a suture is manipulated with long forceps in endoscopic surgery, then the surgical procedure can be performed minimally invasively, but the difficulty of suturing and ligating increases significantly
Solution Approach 1:
The patent introduces a specialized ligating device with a curved needle and suture configuration as an intermediary tool between the surgeon and the tissue. This device includes a suture with specific curvature and a ligating portion that facilitates automated knot formation, reducing the complexity of manual manipulation through long forceps while maintaining minimally invasive benefits
Solution Approach 2:
The suture is pre-formed with a specific curved shape and a pre-configured ligating portion before insertion. This preliminary configuration of the suture geometry and ligating structure eliminates the need for complex real-time manipulation and knot-tying procedures during surgery, thereby reducing operational difficulty while preserving minimally invasive advantages
2Reliability
If a knot is formed by tying the suture manually, then ligation can be achieved, but the operation becomes extremely difficult and requires high adeptness
Solution Approach 1:
The ligating device incorporates a self-ligating mechanism where the suture's own configuration and elastic properties enable automated knot formation. The elastic restoring force of the suture automatically secures the ligating portion without requiring complex manual tying operations, thereby maintaining ligation security while dramatically reducing operational difficulty and the need for high surgical adeptness
3Reliability
If multiple knots are formed to ensure secure ligation, then reliability improves, but the level of difficulty increases further
Solution Approach 1:
The device employs a self-ligating mechanism that automatically forms a secure knot configuration through the elastic restoring force of the suture, eliminating the need for multiple manual knots. This single automated ligating action achieves the same security as multiple knots would provide, thereby reducing procedure complexity while maintaining ligation reliability
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 simplifies the knot-tying process in endoscopic surgeries by leveraging the suture's elastic restoring force to maintain the hook-shaped member's position, ensuring secure ligation and reducing the risk of knot loosening.
Implementation Method 1
a suture having an elastic restoring force
Data Source
AI summary
A tissue ligating device for ligating a tissue includes a suture having an elastic restoring force, and a hook-shaped member including a groove portion, connected to a first end of the suture, and disposed in a direction along a derivation direction of the suture and in a direction opposite to the derivation direction of the suture with respect to the first end of the suture.