Capsule Knotting Module With Sliding Loop for MIS Suturing
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Solution Overview
Problem
Conventional knot-tying processes during minimally invasive surgeries are inefficient and prone to poor knot quality, increasing the risk of wound dehiscence and prolonging recovery time.
Innovation Solution
A capsule needle and thread module with an operating member and knotting member, featuring a through hole, shaft, and suture configuration that allows for the formation of a secure knot through a sliding loop mechanism, assisted by a stop portion to prevent slipping and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional manual knot-tying is used during minimally invasive surgery, then the surgeon can perform wound closure, but the process is complex and difficult resulting in poor knot quality
Solution Approach 1:
The device segments the knot-tying process into distinct functional components: the capsule body houses the suture and forming mechanisms, while the separate forming member is inserted through the capsule to create the knot. This segmentation allows each component to be optimized for its specific function, improving both ease of operation and knot quality.
Solution Approach 2:
The forming member acts as an intermediary tool that facilitates knot formation within the constrained capsule structure. By introducing this intermediate component, the system enables complex knot-tying operations through a simplified two-step process: insert forming member, then form and secure knot.
2Productivity
If conventional manual knot-tying is used, then wound closure can be achieved, but multiple secure knots require repeated operations increasing surgical time
Solution Approach 1:
The suture is pre-loaded and pre-positioned within the capsule body before the surgical procedure begins. This preliminary preparation eliminates the need for time-consuming suture manipulation during surgery, allowing the surgeon to simply insert the forming member and complete the knot, significantly improving surgical efficiency.
Solution Approach 2:
The capsule device is designed to be self-contained with all necessary components (suture, forming mechanisms) integrated into the capsule body. The system performs its own knot-tying function automatically when the forming member is inserted, eliminating the need for repeated manual operations and reducing surgical time.
3Reliability
If conventional manual knot-tying is used, then wound closure is performed, but the risk of wound dehiscence increases due to poor knot quality
Solution Approach 1:
The device replaces the traditional manual mechanical knot-tying process with a controlled mechanical system consisting of the capsule body and forming member. This systematic approach ensures consistent knot formation with proper tension and geometry, eliminating the variability and poor technique associated with manual knot-tying, thereby reducing wound dehiscence risk.
Solution Approach 2:
The invention changes critical parameters of knot formation including tension control, knot geometry, and securing force through the designed interaction between the capsule body and forming member. These parameter optimizations ensure that each knot is formed with sufficient strength and consistency to prevent wound dehiscence.
Data Source
AI summary
A capsule needle and thread module has an operating member (10) and a knotting member (20). With a suture (A), a pre-knot (A1) and a sliding loop (A2) are formed at a front end of the knotting member (20). When in use, the pre-knot (A1) is tied to form a secure knot at a front end of the knotting member (20) to achieve the purpose of suturing and fixing a tissue wound.