Viscerotomy Closure Device with Suture Mesh and Augur Blade
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Solution Overview
Problem
Conventional viscerotomy closure devices and methods are inefficient and prone to reopening of holes created during natural orifice transgastric surgery, lacking a suture entrapped by a circle of staples deployed by a circular stapler acting as a purse string and an augur-shaped blade.
Innovation Solution
A viscerotomy closure device featuring a loop of suture with a Roeder knot attached to a mesh, used in conjunction with an end-to-end anastomosis stapler and an augur-shaped blade, where the loop becomes entrapped as a purse-string around the defect, securing it with staples and ensuring the tissue is self-loaded and stretched appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to create and close the gastrotomy, then the procedure can be completed, but the process is time consuming and increases the possibility of undesirable reopening
Solution Approach 1:
The suture loop is pre-formed and attached to the anvil before the surgical procedure begins. The loop is positioned and prepared in advance, so that when the circular stapler is deployed, the suture is already in place to be entrapped by the staples, eliminating the need for time-consuming suturing during the procedure and ensuring immediate secure closure.
Solution Approach 2:
The invention combines the suture loop attachment mechanism with the circular stapler system. The suture loop is integrated onto the anvil, and when the stapler is fired, both the staples and the suture loop work together simultaneously - the staples create the circular closure while the suture loop acts as a purse-string to cinch the closure tight, merging two closure mechanisms into one unified action.
2Reliability
If conventional circular stapler methods are used without a suture loop, then the device structure is simpler, but the closure is prone to reopening and less secure
Solution Approach 1:
The suture loop acts as an intermediary element between the staples and the tissue closure. While the staples provide the structural framework for closure, the suture loop serves as a mediator that cinches the tissue together, distributing the closure force and preventing staple pull-through, thereby enhancing overall closure security without requiring a completely different device architecture.
Solution Approach 2:
The closure mechanism uses a composite approach combining metal staples with a suture loop material. The staples provide rigid structural support and anchoring, while the suture loop provides flexible cinching capability. This composite closure system leverages the advantages of both materials - the strength of metal and the flexibility of suture - to achieve more secure closure than either method alone.
Data Source
AI summary
Viscerotomy closure devices and methods of use close a hole in a bodily organ, such as one created during a natural orifice transgastric surgery procedure. A mesh with a hole in its center and an attached loop of suture having a Roeder knot is mounted on the protruding rod of an end-to-end anastomosis stapler between the anvil and the staple carrying member. The mesh covers the staple receiving slots. When rotated when in contact with tissue, an augur-shaped blade attached to the anvil's exterior self-feeds the tissue through a notch in the anvil's base into the space between the anvil and the staple carrying member. After the stapler is fired to staple the mesh to the tissue and create a viscerotomy, a knot pusher cinches the loop of suture and subsequently tightens the Roeder knot to maintain the cinch.