Insertion Aid Interference Fit for Surgical Fastening
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Solution Overview
Problem
Existing surgical instruments face challenges in safely and efficiently inserting and removing fastening apparatuses through body orifices during surgical procedures, particularly in colon surgery, due to the need for precise and atraumatic insertion and detachment mechanisms.
Innovation Solution
A shaft-based insertion device with a frictional engagement mechanism and an atraumatic head that creates an interference fit with the surgical fastening apparatus, allowing for selective detachment and attachment of an anvil assembly, facilitated by a removal member for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a blunt surface or sheath is used to facilitate insertion through body orifice, then insertion safety is improved, but device complexity increases
Solution Approach 1:
The insertion device is designed with a shaft that can be inserted through the body orifice, and the fastening apparatus is nested within or attached to the shaft. The head with attachment surfaces is positioned at the distal end of the shaft, creating a nested configuration that facilitates insertion while maintaining structural integrity.
Solution Approach 2:
The insertion device is divided into distinct segments: a shaft portion for insertion through the body orifice, a head portion with attachment surfaces for securing the fastening apparatus, and an engagement member for selective detachment. This segmentation allows each component to perform its specific function while reducing overall complexity.
2Strength
If frictional engagement creates interference fit for secure attachment, then connection strength is improved, but ease of detachment worsens
Solution Approach 1:
The engagement member is designed to transition between engaged and disengaged states. During insertion, the interference fit provides strong connection strength. For detachment, the engagement member can be actuated to release the interference fit, enabling easy removal without damaging the fastening apparatus.
Solution Approach 2:
The engagement member acts as an intermediary mechanism between the shaft and the fastening apparatus. It facilitates the transition from a secure interference fit during insertion to a released state for detachment, mediating between the conflicting requirements of strong connection and easy removal.
3Ease of operation
If removal member is added for easy removal, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The removal member is extracted as a separate, simple component that can be attached to the head of the insertion device. This allows the removal function to be added without significantly complicating the main shaft structure. The removal member can be a simple loop, tab, or grip element that facilitates easy extraction after the procedure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe and efficient insertion and removal of surgical fastening apparatuses, reducing tissue damage and facilitating tissue reconnection during surgical procedures by providing a secure yet removable interface.
Implementation Method 1
The frictional engagement creates an interference fit between the insertion device and the surgical fastening apparatus
Data Source
AI summary
The present disclosure relates to an insertion device including a shaft with a head supported on a distal end thereof. The shaft includes a proximal end with an engagement member that is configured to frictionally engage a distal end of a surgical fastening apparatus such that an interference fit is created therebetween to facilitate selective detachment of the insertion device from the surgical fastening apparatus. The head has an atraumatic configuration, and is dimensioned to be received in a body orifice.