Tissue Closure Device Pouch Assembly for Anastomosis
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Solution Overview
Problem
In digestive tract anastomosis surgery, the use of linear or arcuate staplers often results in 'dog ears' and a higher risk of stoma fistula due to limited pelvic floor operation space and stapler swing angle, increasing surgical complexity and cost.
Innovation Solution
A tissue closure device with a pouch assembly and tying band mechanism that forms a cavity for tubular tissues, allowing the tissue to be gathered into a bundled pouch, reducing 'dog ears' and stoma fistula risks through synchronized movement of tying band buckles and a driving mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If linear stapler or arcuate stapler is used for resection and anastomosis, then multi-angle resection and anastomosis can be performed, but cross-staple phenomenon and dog ears appear due to limited pelvic floor operation space and stapler swing angle
Solution Approach 1:
The tissue closure device divides the anastomosis process into distinct stages: first using linear stapler for resection, then using the tissue closure device to gather and pouch the tissue ends, and finally using tubular stapler for circular anastomosis. This segmentation allows each tool to perform its optimal function while avoiding the cross-staple problem.
Solution Approach 2:
The tissue closure device performs preliminary gathering and pouching of the tissue ends before the final anastomosis. The pouch assembly with tying band buckles gathers the tissue into a bundled pouch, creating a uniform configuration that eliminates dog ears and prepares the tissue for precise circular anastomosis.
2Ease of operation
If linear stapler is used for resection and anastomosis, then surgery can be performed, but dog ears appear and stoma fistula risk increases
Solution Approach 1:
The tissue closure device acts as an intermediary tool between the linear stapler resection and the tubular stapler anastomosis. It gathers and pouches the tissue ends, creating an intermediate configuration that ensures reliable circular anastomosis and reduces stoma fistula risk.
Solution Approach 2:
The device changes the physical state of the tissue from a linear cut edge to a gathered bundled pouch configuration. This parameter change in tissue morphology eliminates the dog ear formation and creates optimal conditions for reliable circular anastomosis.
3Ease of manufacture
If tubular stapler is used for anastomosis after linear stapler, then connection can be performed, but surgery cost increases and complications arise
Solution Approach 1:
The tissue closure device with pouch assembly serves multiple functions: gathering tissue, forming pouch, and preparing for circular anastomosis. This multi-functionality consolidates what would otherwise require multiple specialized tools, simplifying the overall surgical procedure while maintaining anastomosis feasibility.
Data Source
AI summary
The present invention provides a tissue closure device, comprising: a first and a second clamping base which form a cavity there between for accommodating a tubular tissue; and a pouch assembly comprises: a tying band provided with a first free end and a second free end; a first tying band buckle which is arranged adjacent to the first free end in an initial state; a second tying band buckle arranged adjacent to the second free end in an initial state, wherein the second tying band buckle is buckled with the first tying band buckle after the first and the second clamping base are closed; and a first driving mechanism which enables the first and the second tying band buckle to move synchronously after the first and the second tying band buckle are buckled and then cooperate with the tying band to gather the tubular tissue into a pouch.