Circular Cutting Stapler for Eversion Anastomosis
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Solution Overview
Problem
Existing cutting staplers for medical procedures face challenges in efficiently performing end-to-end eversion anastomosis, particularly due to complications such as stenosis, obstruction, and increased surgical costs associated with multiple stapler use and additional incisions.
Innovation Solution
A circular cutting stapler with a unique design featuring a shell, ejector plate pin, cartridge pin, anvil pin, unlocking pin, and rings with hinged ends, allowing for automatic ring release and easy removal from the lumen after anastomosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If intraluminal circular stapler is used for end-to-end anastomosis, then anastomosis can be performed, but additional stoma is required and secondary anastomosis of stoma is needed, increasing surgical difficulty, cost, and potential complications
Solution Approach 1:
The invention extracts the circular stapler mechanism from the intraluminal approach and positions it extraluminally. The cartridge and anvil are placed outside the lumen, allowing the stapling and cutting action to occur from the external side, thereby eliminating the need for intraluminal access and subsequent stoma management
Solution Approach 2:
The invention inverts the traditional intraluminal approach by performing the anastomosis from the extraluminal side. Instead of inserting the stapler into the lumen and working from the inside out, the stapler is positioned outside and works from the outside in, reversing the conventional sequence and eliminating the need for additional stoma creation
2Productivity
If anastomotic nail is located in tissue and organ cavities, then anastomosis can be achieved, but postoperative complications such as stenosis and obstruction occur
Solution Approach 1:
The invention extracts the anastomotic nail from the intraluminal position and relocates it to the extraluminal space. The nail is driven through the tissue from outside in, so that its head and retaining structure remain outside the lumen, preventing interference with luminal flow and eliminating the risk of stenosis or obstruction
Solution Approach 2:
The invention introduces a cartridge structure that acts as an intermediary mechanism. The cartridge holds the anvil and facilitates the driving of the anastomotic nail from the extraluminal side, serving as a mediator that enables the nail placement while preventing its harmful intraluminal positioning
3Productivity
If multiple linear cutting staplers are used for anastomosis, then anastomosis can be performed, but surgical difficulty increases and cost greatly increases
Solution Approach 1:
The invention creates a universal circular stapler system that performs multiple functions in a single device. The circular cartridge can execute both stapling and cutting operations, replacing the need for multiple separate linear staplers and achieving end-to-end anastomosis with a single instrument
Solution Approach 2:
The invention merges the stapling and cutting functions into a single circular cartridge assembly. The cartridge contains both the anvil for stapling and the blade for cutting, combining multiple operations into one integrated device that can complete the entire anastomosis process
4Productivity
If multiple cartridges are used, then anastomosis can be achieved, but surgical cost greatly increases
Solution Approach 1:
The circular cartridge is designed as a universal, reusable component that can perform all anastomotic operations. Unlike disposable linear cartridges that require replacement, this single circular cartridge can be used for the complete anastomosis procedure, reducing the quantity of consumables needed
Solution Approach 2:
The invention enables recovery and reuse of the circular cartridge after the anastomosis procedure. The cartridge can be removed from the patient and sterilized for future use, whereas traditional linear cartridges are typically single-use and must be discarded, significantly reducing surgical costs
Data Source
AI summary
The present disclosure provides a stapler, including a shell, an ejector plate pin, a cartridge pin, an anvil pin, an unlocking pin, an ejector plate ring, a cartridge ring and an anvil ring, where the cartridge pin is between the ejector plate pin and the anvil pin; the ejector plate ring, the cartridge ring and the anvil ring all include a first half ring and a second half ring; hinged ends of the first half rings and the second half rings are rotatably connected, and fixed ends of the second half rings of the ejector plate ring, the cartridge ring and the anvil ring are connected to the front ends of the ejector plate pin, the cartridge pin and the anvil pin, respectively. The present disclosure adopts a brand-new concept of eversion anastomosis, and ensures the smoothness of a lumen after anastomosis.