Guide Needle and Outer Tube Suturing Through Small Incisions
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Solution Overview
Problem
In minimally invasive surgery, suturing tools face difficulty extending deeply enough through small incisions to perform suturing effectively.
Innovation Solution
A surgical guidewire device comprising an outer tube and a guide needle with a needle eye structure, along with a guidewire block, is used to guide sutures through the incision, allowing for suture fixation and closure of wound sites without a large incision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a small incision is used for minimally invasive surgery, then patient recovery time is shortened and incision size is reduced, but suturing tools cannot extend deeply enough to perform effective suturing
Solution Approach 1:
The device employs a nested structure where the guide needle is disposed inside the outer tube, and the suture passes through multiple components in sequence. The needle eye structure is positioned at the distal end of the guide needle, allowing the suture to be threaded through the needle and then pulled through the outer tube via the retrieval structure, enabling deep tissue access through a small incision while maintaining suturing capability
Solution Approach 2:
The guide needle acts as an intermediary tool that transfers the suture from the proximal end through the outer tube to the distal wound site. The retrieval structure on the outer tube serves as another intermediary mechanism that grasps and pulls the suture through the tube, enabling the suture to reach deep internal wound sites without requiring a large incision
2Ease of operation
If a large incision is made to allow suturing tools deep access, then effective suturing can be performed, but patient recovery time increases and incision size is larger
Solution Approach 1:
The nested configuration allows the suture delivery system to be collapsed into a compact form that can pass through a small incision. The guide needle fits within the outer tube, and the suture can be routed through multiple components, enabling the entire suturing system to be introduced through a minimally invasive access point while maintaining full suturing functionality at the target site
Solution Approach 2:
The device incorporates movable and flexible components including the guide needle that can be advanced and retracted relative to the outer tube, and the retrieval structure that can dynamically grasp and pull the suture through the tube. This dynamic capability allows the system to adapt to deep tissue geometry and perform effective suturing without requiring a permanently large incision
Data Source
AI summary
A surgical guidewire device includes an outer tube and a guide needle. The outer tube has a needle tip formed at a tube distal end of the outer tube. The guide needle is movably disposed in the outer tube and has a needle eye structure. When the surgical guidewire device is in use, a suture extends through the needle eye structure, and is carried through the outer tube along with the needle eye structure as the guide needle is moved relatively toward the tube distal end and then away from the outer tube.