Cannula Tips With Locking Mechanism For Adjustable Tissue Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cannula designs lack adjustability and efficient securement mechanisms, making it difficult to accommodate individual anatomical differences and requiring time-consuming placement, especially when using sewing rings.
Innovation Solution
A surgical cannula system with a locking mechanism that transitions between states to allow for adjustable positioning, featuring a tissue attachment ring with an inner groove and a pawl mechanism for secure attachment to biological tissue, enabling variable and non-discrete positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cannula designs are secured to tissue using sutures or sewing rings, then the cannula is firmly attached to the tissue, but the positioning becomes fixed and non-adjustable, limiting adaptability to individual anatomical differences
Solution Approach 1:
The locking mechanism transitions from a static fixed position to a dynamic adjustable system. The cannula can be positioned at multiple discrete locations along the tissue attachment ring and locked into place, allowing adjustment while maintaining secure attachment. This resolves the contradiction by making the attachment both reliable and adaptable.
Solution Approach 2:
The locking mechanism divides the continuous adjustment range into discrete positionable segments. The cannula can be secured at specific intervals along the tissue attachment ring rather than at any continuous position, providing both adjustability and stable locking at defined positions.
2Reliability
If a sewing ring is used to secure the cannula to tissue, then firm attachment is achieved, but the placement process becomes time-consuming
Solution Approach 1:
The tissue attachment ring is pre-configured with the locking mechanism and inner groove structure before surgery. This preliminary preparation eliminates the need for time-consuming suturing during the procedure, as the cannula can be quickly attached and locked into position using the pre-built mechanical locking system.
Solution Approach 2:
The traditional suture-based mechanical attachment system is replaced with a mechanical locking system featuring a pawl and inner groove. This substitution maintains secure attachment while dramatically reducing placement time by eliminating the manual suturing process.
3Stability of the object's composition
If the cannula position is fixed after securement, then attachment stability is maintained, but the ability to accommodate individual anatomical differences is lost
Solution Approach 1:
The system transitions from a static fixed-position design to a dynamic multi-position system. The cannula can be adjusted to different positions along the tissue attachment ring to accommodate varying anatomical configurations, then locked stable for long-term securement. This provides both adaptability during positioning and stability during use.
Solution Approach 2:
The position parameter of the cannula can be changed to accommodate different anatomical variations. The locking mechanism allows the position parameter to be adjusted within a range of discrete values, enabling customization for individual patients while maintaining stable attachment at the selected position.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A surgical cannula system. The surgical cannula system includes a cannula (60) having a proximal end, a distal end, and a lumen (82) extending therebetween. A tissue attachment ring (110), being configured to be coupled to a biological tissue (74), includes a lumen (117) extending therethrough. A locking mechanism (119) has a first locking state, in which the cannula (60) is configured to move with respect to the tissue attachment ring (110), and a second locking state, in which movement of the cannula (60) with respect to the tissue attachment ring (110) is resisted.