Surgical Ligation Device with Spool and Cannula
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Solution Overview
Problem
Conventional surgical ligation techniques are time-consuming, wasteful of suture material, and risk injury to structures due to the need for multiple instruments and complex procedures, especially in endoscopic and robotic surgeries where precision and efficiency are critical.
Innovation Solution
A device comprising a cannula with a hinge and a spool mechanism for dispensing, looping, and tying ligatures, which allows for single-handed operation with minimal tissue contact, reducing the need for additional instruments and optimizing suture usage by reusing the ligature thread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surgical ligation techniques are used with multiple instruments and complex procedures, then the ligation can be performed, but the procedure becomes time-consuming and increases the risk of injury to structures
Solution Approach 1:
The patent combines multiple functions (dispensing ligature, looping around structure, and tying knot) into a single integrated device. The device includes a spool for ligature dispensing, a delivery mechanism with cannulae for passage, and a knot-tying mechanism with movable members that work together to perform ligation in a unified operation, eliminating the need for separate instruments and reducing procedure time while maintaining safety
Solution Approach 2:
The device performs multiple surgical ligation functions through a single instrument system. The movable members can dispensing ligature from the spool, pass it through the cannulae around the target structure, and automatically tie knots by manipulating the ligature ends. This multi-functional design reduces the number of instruments needed and streamlines the ligation process
2Ease of operation
If conventional ligation techniques are used with multiple instruments, then the procedure can be completed, but the device complexity increases and ease of operation decreases
Solution Approach 1:
The patent integrates ligature dispensing, looping, and knot-tying functions into one device with coordinated movable members. The spool, cannulae, and knot-tying mechanism work as a unified system that can be operated with one hand, eliminating the need to coordinate multiple separate instruments and reducing operational complexity despite the integrated functionality
3Adaptability or versatility
If conventional techniques are used with curved clamps and multiple steps, then ligation can be achieved, but the procedure becomes difficult to perform through narrow endoscopic ports
Solution Approach 1:
The device is designed with modular components including a spool assembly, cannulae delivery system, and knot-tying mechanism with movable members. This segmented design allows the device to be manipulated through narrow endoscopic ports and adapted for robotic surgery, while the coordinated movement of the segmented components enables complex ligation tasks to be performed through limited access
Data Source
AI summary
A device for dispensing, looping and tying ligature comprising a housing, a spool, a cannula, a lock-unlock mechanism and a snare is disclosed. The spool has surgical or non surgical thread/cord wound thereon in a plurality of turns. The spool is rotatably and removably mounted in the housing. The cannula is removably and rotatably mounted to the base of the housing. The lock-unlock mechanism is configured to control dispensing of the thread/cord. The snare includes a steel wire to form a Y shape or hook shape with a narrow pointed tip to thread the cannula.