Surgical Cannula Removable Seal Pressure Retention
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Solution Overview
Problem
Current surgical cannulas lack the ability to effectively retain pressurized fluids or gases within a surgical site while allowing for the introduction of larger items, such as tissue grafts, during arthroscopic procedures.
Innovation Solution
A surgical cannula design featuring a removable seal structure with valves that securely retains pressure within the cannula body, allowing for the introduction of tools and grafts, and includes suture attachment structures for anchoring to tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal structure is added to retain pressure within the cannula body, then pressure retention capability is improved, but device complexity increases
Solution Approach 1:
The seal structure is designed as a separate, removable component that can be independently attached to or removed from the cannula body. This segmentation allows the sealing function to be added without permanently complicating the base cannula structure, enabling pressure retention when needed while maintaining simplicity during removal.
Solution Approach 2:
The seal structure transitions from a static component to a dynamic one through its removable nature. It can be engaged to provide pressure retention during specific surgical phases, then removed when pressure retention is no longer needed, allowing the system to adapt its complexity based on operational requirements.
2Adaptability or versatility
If the seal structure is made removable to allow introduction of grafts and tools, then adaptability is improved, but reliability of pressure retention may worsen
Solution Approach 1:
The seal structure is pre-configured with attachment features that enable reliable sealing before use. The design includes predetermined engagement mechanisms that ensure proper positioning and secure attachment, thereby maintaining pressure retention reliability even though the seal is removable and can be detached when needed for graft or tool introduction.
3Reliability
If a valve is included in the seal structure to maintain pressure, then pressure retention is improved, but device complexity increases
Solution Approach 1:
The valve function is merged into the seal structure as an integrated component rather than a separate element. This combination achieves pressure retention capability while minimizing additional complexity, as the valve operates within the existing seal geometry and attachment mechanism rather than requiring independent structural elements.
Data Source
AI summary
A surgical cannula includes a seal structure including a one-way check valve and a cannula body. The cannula body includes an insertion portion having a distal opening that is configured to be inserted into tissue, and a receiving portion that includes a proximal opening and is configured to reversibly receive the seal structure. In addition, the seal structure is configured to removably associate with the proximal opening of the cannula body, retain a positive pressure within the cannula body when engaged with the cannula body, and retain a positive pressure within the cannula body when an object is inserted through the cannula and the seal structure. Also, the cannula further includes one or more suture attachment structures extending outward laterally from the cannula body; and one or more internal recesses in an inner wall of the cannula located directly adjacent to the one or more suture attachment structures.