Purse String Tissue Closure Device for Anastomosis
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Solution Overview
Problem
In digestive tract anastomosis surgeries, the use of linear or arcuate staplers often results in cross-staple phenomena and 'dog ears' due to limited pelvic floor operation space and stapler swing angle, increasing the risk of stoma fistula and surgical costs.
Innovation Solution
A tissue closure device with a bundled purse string mechanism, featuring a first and second clamping base with convex blocks that form a V-shaped opening, allowing for the creation of a gathered center purse string, reducing the risk of stoma fistula and facilitating smoother anastomosis procedures.
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 stapling function into multiple independent clamping bases (first clamping base and second clamping base), each capable of independent operation. This segmentation allows the device to overcome the limited swing angle of traditional linear staplers by positioning multiple clamping bases at different locations, thereby achieving precise staple lines without cross-staple phenomena while maintaining multi-angle resection and anastomosis capability
Solution Approach 2:
The invention transitions from a single linear stapling approach to a multi-dimensional arrangement by positioning the first and second clamping bases at different spatial locations and orientations. This dimensional change enables the device to accommodate the limited pelvic floor operation space while achieving precise staple line formation, eliminating cross-staple phenomena and dog ears that occur with traditional single-dimension linear staplers
2Ease of operation
If linear stapler is used at lower rectum position, then resection and anastomosis can be performed, but cross-staple phenomenon appears due to limited pelvic floor operation space and stapler swing angle
Solution Approach 1:
By segmenting the stapling function into multiple independent clamping bases that can be positioned at different locations, the device enables effective resection and anastomosis procedures in the limited pelvic floor space without causing cross-staple phenomena. This segmentation maintains procedural ease while eliminating the reliability issue of stoma fistula risk associated with cross-staple formation
Solution Approach 2:
The tissue closure device acts as an intermediary between the surgeon's operational needs and the anatomical constraints of the pelvic floor. The device's multiple clamping bases serve as intermediate structures that can be positioned to avoid cross-staple phenomena, thereby reducing stoma fistula risk while maintaining the ability to perform necessary resection and anastomosis procedures
Data Source
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AI summary
The present invention provides a tissue closure device, comprising: a first clamping base and a second clamping base which may be opened/closed relatively and form an accommodation cavity after being closed; and a pouch assembly which may be driven to move from a proximal end to a distal end in the accommodation cavity, wherein: the pouch assembly comprises a staple pusher, a pair of needle heads movably connected to the staple pusher, and a connection portion connected to the proximal ends of the pair of needle heads; and when the staple pusher moves from the proximal end to the distal end, the pair of needle heads pushes a tubular tissue located in the accommodation cavity to the distal end until the distal ends of the pair of needle heads are closed to close the tubular tissue into a purse string. A bundled purse string with a gathered center may be formed through the tissue closure device.