Surgical Stapling Reload Locking Mechanism
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Solution Overview
Problem
Conventional surgical stapling apparatuses face issues where reloads can become disengaged from the actuator device when the tool assembly is in an articulated position, preventing the attachment of a fresh reload.
Innovation Solution
A surgical apparatus with a universal handle articulating link that includes a first articulating link and mechanical interfaces, which prevents the reload from being disengaged from the actuator device when the tool assembly is in an articulated configuration by engaging with a second articulating link and locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tool assembly is made articulatable to facilitate easier access to tissue during surgical procedures, then the ease of operation is improved, but the reliability of the connection between reload and actuator device deteriorates because the reload may become disengaged when in an articulated position
Solution Approach 1:
A universal handle articulating link is introduced as an intermediary component between the actuator device and the reload. This link includes a mechanical interface that engages with both the actuator device and the reload's articulating link, preventing disengagement while allowing the tool assembly to articulate. The articulating link acts as a mediator that maintains the connection regardless of the tool assembly's position.
Solution Approach 2:
The solution moves the disengagement prevention mechanism from the rotational dimension (where traditional bayonet-style connections operate) to a linear dimension. The mechanical interface on the articulating link engages with a slot or groove in a linear fashion, preventing disengagement through axial engagement rather than radial engagement, thereby solving the disengagement problem while preserving articulation capability.
2Reliability
If a mechanical interface is added to prevent disengagement of the reload, then the reliability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The universal handle articulating link serves multiple functions: it maintains the connection between the actuator device and reload, allows the tool assembly to articulate, and prevents disengagement through its mechanical interface. By combining these functions into a single component, the solution avoids adding multiple separate parts that would increase complexity, instead making one component multi-functional.
Solution Approach 2:
The articulating link merges the functions of connection maintenance and disengagement prevention into a single integrated component. Rather than adding a separate locking mechanism or additional interfaces, the design combines the articulation capability with the anti-disengagement feature in one element, thereby improving reliability without proportionally increasing device complexity.
Data Source
AI summary
A surgical apparatus is provided. The surgical apparatus includes an actuator device including a body portion defining a longitudinal axis and a first articulating link. The first articulating link includes a mechanical interface and is movable between a non-articulated position and at least one articulated position. A reload is releasably coupled to a distal end of the body portion. The reload including a second articulating link configured to engage the first articulating link when the reload is coupled to the actuator device. The reload including a tool assembly which is pivotable from a first a position aligned with the longitudinal axis of the body portion to at least one position misaligned with the longitudinal axis of the body portion. The first articulation link and the mechanical interface prevent the reload from being disengaged from the actuator device when the first articulating link is in the at least one articulated position.