Suture Knot-Tying Loop Stabilization for Reliable Suturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing suturing devices face challenges in maintaining the shape of a loop formed by a suture due to factors like body fluids' surface tension or weight, which can hinder reliable knot formation.
Innovation Solution
A knot tying device with a holding portion, loop forming portion, and positioning portion, along with a first suture hook, stabilizes the loop formation by fixing it in place, allowing the hook to pass through and catch the suture, thereby tying a knot securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the loop is formed by the first suture alone relying on its own rigidity, then the structure is simple, but the loop shape cannot be maintained due to surface tension of body fluids or weight of attached body fluids
Solution Approach 1:
The patent introduces a loop maintaining member as an intermediary component between the first suture and the external environment. This member has a loop receiving portion that receives and maintains the loop shape of the first suture, preventing deformation caused by surface tension or weight. The intermediary structure transfers the load from the delicate suture loop to the more robust loop maintaining member, resolving the contradiction between structural simplicity and loop shape maintenance reliability.
2Ease of operation
If the shuttle is made rotatable in both directions to enable passage from each side, then the ease of operation is improved, but the control precision for reliable knot formation deteriorates
Solution Approach 1:
The patent employs a suture pusher that automatically pushes the first suture through the loop maintaining member and secures it in place. This self-service mechanism ensures that the suture is properly positioned and tensioned without requiring precise manual manipulation of the rotatable shuttle, thereby maintaining ease of operation while improving knot formation reliability through automated precision.
Data Source
AI summary
A knot tying device includes a holding portion, a first loop forming portion, a positioning portion, and a first suture hook. The holding portion including a suture hooking portion at its distal end portion. The holding portion is configured to hold a suture that is engaged with the suture hooking portion. The first loop forming portion is configured to form a loop of the suture fixedly. The positioning portion is configured to position the suture hooking portion with which the suture is engaged, at a specific position. The first suture hook is configured to pass through the loop, and catch and hold the suture in a state where the suture hooking portion with which the suture is engaged is located at the specific position. The first suture hook causes the suture to pass through the loop, thereby tying a knot in the suture.