Surgical Stapler with Movable Anvil for Gastric Volume Reduction
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Solution Overview
Problem
Current surgical staplers for gastric volume reduction procedures are inefficient due to the need for individual placement and manual tensioning of T-Tag anchors, requiring extensive time, complexity, and cost, and existing staples lack sufficient strength and durability for involuting the gastric cavity wall.
Innovation Solution
A low-profile surgical stapler that deploys folded, box-shaped staples with a closed loop configuration, capable of expanding to achieve a large tissue purchase through a small diameter delivery shaft, allowing for multiple staples to be deployed quickly and efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If T-Tag anchors are individually placed and manually tensioned, then tissue approximation can be achieved, but procedural time and complexity increase significantly
Solution Approach 1:
The stapler divides the tissue approximation task into multiple discrete staple deployment points along the gastric cavity wall. Each staple independently approximates tissue at its location, and the cumulative effect of multiple staples achieves comprehensive tissue approximation without requiring manual tensioning at each point.
Solution Approach 2:
The stapler device automatically performs the tissue approximation function through its mechanical action of deploying staples and forming tissue folds. The device serves itself by using the stapling mechanism to create the approximation without requiring separate manual tensioning operations or additional anchors.
2Ease of operation
If a low-profile stapler is used to deliver staples through a small port, then minimally invasive access is achieved, but staple strength and durability are reduced
Solution Approach 1:
The staple transitions from a compact, low-profile configuration during delivery through the small port to an expanded, high-strength configuration after deployment. The staple is formed with multiple bends and a closed-loop structure that maximizes strength while maintaining a small delivery profile, allowing the system to adapt its geometry based on operational requirements.
Solution Approach 2:
The staple is formed from a single piece of wire with optimized geometry including multiple bends, a closed loop configuration, and a crown structure. This composite-like structure combines the advantages of different geometric forms to achieve both small profile for delivery and high strength for tissue approximation, eliminating the need for separate material selection compromises.
3Reliability
If multiple staples are deployed to increase tissue purchase area, then approximation reliability improves, but device complexity and procedural time increase
Solution Approach 1:
The stapler merges multiple staple deployment operations into a single integrated device action. By loading multiple staples onto the anvil and firing them simultaneously or in rapid sequence during one actuation cycle, the device achieves the reliability of multiple approximation points without requiring multiple separate deployment operations or complex sequential control mechanisms.
Solution Approach 2:
Multiple staples are pre-loaded onto the anvil in advance of the surgical procedure. This preliminary preparation allows the surgeon to deploy all necessary staples in a single efficient motion rather than loading and firing them individually during the procedure, reducing operational complexity and time while maintaining comprehensive tissue approximation.
Data Source
AI summary
A surgical fastener applier having a handle and a fastener housing extending from the handle. The housing contains at least one anvil movable within the staple housing, the anvil has a proximal position and a distal position. When in the distal position a distal end of the anvil extends distal to the distal end of the staple housing. The housing contains a plurality of surgical fasteners each of which in the shape of a loop. At least one of the fasteners is placed around a portion of the anvil when in the distal position. The applier has a first mechanism for moving the anvil distally after a fastener has been deployed, and a second mechanism for moving the anvil distally after a fastener has been deployed. The second means is independent of the first means.