Radial Staple Arrangement and Pivotable Anvil for Surgical Anastomosis
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Solution Overview
Problem
Existing surgical stapling instruments face challenges with staple ring failure due to poor blood perfusion leading to tissue necrosis and flaking, resulting in less than optimal long-term clinical outcomes during anastomosis procedures.
Innovation Solution
A surgical stapling instrument with staples arranged in a radial fashion towards the center axis of the staple cartridge assembly, allowing improved blood perfusion and increased hold strength by using more staples, and an anvil assembly with a pivotable anvil head that reduces the transverse profile for easier insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid anvil head with a fixed profile is used, then the anvil assembly provides structural stability during firing, but it becomes difficult to remove the instrument from the tubular organ due to the large transverse profile
Solution Approach 1:
The anvil head is made pivotable relative to the anvil shaft, allowing it to transition from a fixed operative position during firing to a tilted removed position after firing. This dynamic transformation enables the anvil assembly to adapt its profile: stable and compact during operation, then streamlined for easy removal from the tubular organ.
2Device complexity
If staples are arranged in a conventional circular pattern, then the staple cartridge assembly is simple in design, but blood perfusion is poor leading to tissue necrosis and staple ring failure
Solution Approach 1:
The staples are arranged asymmetrically in a radial pattern rather than a symmetric circular pattern. The radial arrangement positions staple receiving slots at different angular intervals around the center axis, creating an asymmetric distribution that improves blood flow channels and prevents tissue necrosis while maintaining structural integrity.
Solution Approach 2:
The staple arrangement transitions from a two-dimensional circular pattern to a three-dimensional radial configuration. The staples are positioned at varying radial distances and angular intervals from the center axis, creating a spatial distribution that optimizes blood perfusion pathways while maintaining cartridge simplicity.
3Productivity
If fewer staples are used in the staple cartridge assembly, then the device is simpler and faster to operate, but the hold strength is insufficient leading to staple ring failure
Solution Approach 1:
Instead of uniformly distributing staples, the radial arrangement allows for localized optimization where staple receiving slots are positioned at specific angular intervals and radial distances. This enables strategic placement of staples in areas requiring greater hold strength while maintaining overall device simplicity and operational efficiency.
Data Source
AI summary
The present disclosure includes apparatuses for a surgical stapler. An example surgical stapler can include a handle assembly and a body portion extending from the handle portion, the body portion having a staple cartridge assembly, the staple cartridge assembly defining a first row of staple receiving slots, the staple receiving slots have an outer edge, wherein the staple receiving slots are arranged in a generally radial orientation with respect to the center axis of the staple cartridge assembly.