Pre-Knotted Ligature Instrument for Single-Grasp Suturing
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Solution Overview
Problem
Current surgical suturing methods, such as using clips or endoloops, require users to repeatedly release and re-grasp the targeted area, which can be problematic, especially when dealing with sensitive areas like bleeding vessels.
Innovation Solution
A surgical suturing device with a handle, grasping mechanism, jaws, and couplers that allows for the application of an open-loop, pre-knotted suture without repeated release, enabling the suture to be closed around the target area and securely tied off without re-grasping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional clips or endoloops are used for suturing, then the suturing function can be achieved, but the user must repeatedly release and re-grasp the targeted area, which increases operation time and reduces precision
Solution Approach 1:
The suture is pre-knotted and prepared in advance on the device, allowing the user to apply it directly to the target area without needing to release and re-grasp repeatedly. The pre-knotted configuration enables the suture to be applied in a single continuous motion.
Solution Approach 2:
The device acts as an intermediary tool that holds the pre-knotted suture and facilitates its application around the target area. The device's structure allows the suture to be looped and secured without requiring the user to repeatedly release and re-grasp the target area.
2Ease of operation
If the user repeatedly releases and re-grasps the targeted area to apply the endoloop, then the endoloop can be applied, but this causes instability and increases the risk of damage to sensitive areas like bleeding vessels
Solution Approach 1:
The suture is pre-knotted and ready for application, eliminating the need for repeated release and re-grasp actions. This preliminary preparation ensures stable and reliable application to sensitive areas without disrupting the target area multiple times.
3Reliability
If a closed-loop endoloop is used, then the suture can be tied off securely, but the device becomes more complex and requires additional components for knot passage and tightening
Solution Approach 1:
The suture is pre-knotted before application to the target area, simplifying the device design by eliminating the need for complex knot passage mechanisms. The pre-knotted configuration allows the suture to be applied and secured directly without requiring additional components for knot manipulation.
Data Source
AI summary
The present invention is a surgical suturing device that assists in applying an open-looped, pre-knotted suture around a targeted area of application. The surgical suturing device contains a handle, a grasping mechanism, a clamp tube, a pusher tube, a cutter tube, and a pivot arm. A first coupler is positioned on the pivot arm. A second coupler is positioned at the end of the shaft, offset from the pivot arm. A suture knot is fitted over the second coupler, and a strand is connected to the first coupler. When activated, the pivot arm moves into a closed position, thereby encircling the suturing portion and joining the first coupler to the second coupler. Next, the suture knot is pushed forward off the second coupler and tightened up against the suturing portion. The pusher tube slides back, allowing the cutter tube to cut the excess suture cord.