Circular Stapler Anvil with Mirrored Pocket Arrays
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Solution Overview
Problem
Current surgical stapling instruments for end-to-end anastomosis in digestive tract procedures face challenges in ensuring a leak-proof seal and efficient tissue handling, particularly during the transition between anatomical lumens.
Innovation Solution
The development of a circular stapling instrument with a modular design, featuring a stapling head assembly, anvil, and motorized actuation, which includes a stapling head with a slidable staple driver and knife member for simultaneous cutting and stapling, along with adjustable anvil configurations to optimize staple formation and tissue engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circular stapler is used to perform end-to-end anastomosis, then the tissue can be sealed and joined together, but ensuring a leak-proof seal and efficient tissue handling during the transition between anatomical lumens remains challenging
Solution Approach 1:
The anvil is designed with a movable, adjustable configuration that allows dynamic adaptation to different tissue thicknesses and anatomical transitions. The anvil can be repositioned along the circular stapler shaft to optimize staple formation at varying tissue depths, ensuring reliable sealing while facilitating ease of operation during anastomosis procedures
Solution Approach 2:
The system allows adjustment of anvil position and configuration parameters to match specific surgical requirements. By changing the anvil's radial and longitudinal parameters, the stapler can accommodate different tissue types and transition zones, maintaining leak-proof seals while improving tissue handling efficiency
2Adaptability or versatility
If the anvil is designed with fixed staple forming pockets, then the structure is simple, but it cannot optimize staple formation for different tissue thicknesses and anatomical transitions
Solution Approach 1:
The anvil incorporates movable components that allow adjustment of staple forming pocket positions and orientations. This dynamic configuration enables optimization of staple formation for varying tissue thicknesses and anatomical transitions without requiring multiple separate anvils, balancing adaptability with controlled complexity
Solution Approach 2:
The adjustable anvil design provides multi-functionality by accommodating various tissue types, thicknesses, and anatomical locations within a single device. The universal design allows the same anvil to be configured for different surgical scenarios, enhancing adaptability while avoiding the need for multiple specialized components
3Productivity
If the circular stapler includes motorized actuation mechanism, then the stapling and cutting can be performed simultaneously with precise control, but the device complexity increases
Solution Approach 1:
The motorized actuation mechanism merges the stapling and cutting functions into a single coordinated action. The motor drives both the staple deployment and knife activation through integrated mechanical linkages, enabling simultaneous operation and improving productivity while consolidating control systems to manage device complexity
Data Source
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AI summary
An anvil for a circular surgical stapler includes an anvil surface and an anvil shaft. The anvil surface defines an inner annular array of staple forming pockets and an outer annular array of staple forming pockets. The inner annular array of staple forming pockets includes a plurality of staple forming pocket pairs. The outer annular array of staple forming pockets also includes a plurality of staple forming pocket pairs. The outer annular array of staple forming pockets is arranged in a mirrored symmetry with the inner annular array of staple forming pockets. The anvil shaft is configured to couple with a stapling head assembly of a surgical stapler.