Suture Guide Cannula Structure for Single-Portal Tissue Fixation
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Solution Overview
Problem
Existing surgical instruments lack an efficient method to securely hold soft tissue while allowing a penetrating device to pass through and retrieve suture using a single portal, leading to suture tangling and prolonged surgical procedures.
Innovation Solution
A surgical instrument with a cannula design featuring a proximal and distal slot, and a notch at the distal end, which securely holds tissue and allows a penetrating device to slide through, enabling simultaneous tissue grasping and suture retrieval through a single portal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing surgical instruments are used to hold soft tissue and retrieve suture, then tissue grasping and suture retrieval can be performed, but suture tangling occurs and surgical procedure time is prolonged
Solution Approach 1:
The surgical instrument is segmented into distinct functional zones: a tissue engagement region with grasping elements, a cannula body with longitudinal slots for suture passage, and a distal opening for penetrator access. This segmentation allows independent optimization of tissue holding and suture retrieval functions, preventing interference between these operations and eliminating suture tangling.
Solution Approach 2:
The design implements a nested structure where the penetrator device is received within the cannula, and the suture is threaded through the cannula's longitudinal slots. The penetrator passes through the tissue while the suture follows through the cannula's internal pathways, creating a hierarchical arrangement that guides suture movement and prevents tangling during the surgical procedure.
2Ease of operation
If existing surgical instruments are used for tissue grasping and suture retrieval, then both functions can be performed, but the procedures are not simultaneous and require multiple steps
Solution Approach 1:
The surgical instrument integrates multiple functions into a single device: the cannula body simultaneously provides tissue grasping capability through its engagement region, suture guidance through longitudinal slots, and penetrator reception. This multi-functional design eliminates the need for separate instruments for each step, simplifying the overall surgical procedure while maintaining functional sophistication.
Solution Approach 2:
The instrument merges the tissue holding function, suture passage function, and penetrator guidance function into a single integrated structure. The cannula body combines grasping elements for tissue security with internal slots for suture movement and an opening for penetrator insertion, allowing all operations to occur through one instrument and enabling simultaneous execution of multiple surgical tasks.
3Reliability
If a penetrating device passes through tissue without secure tissue holding, then suture retrieval is possible, but tissue security and control are compromised
Solution Approach 1:
The cannula acts as an intermediary structure between the penetrator and the suture. The longitudinal slots within the cannula body provide a controlled pathway that guides the suture as it passes through the tissue, preventing the suture from tangling or deviating from the intended path. This intermediary structure ensures both tissue security during penetration and orderly suture retrieval.
Data Source
AI summary
Surgical constructs, assemblies, kits and methods of tissue fixation are disclosed. A surgical guide includes a cannula with a distal section having a proximal slot, a distal slot, and a notch opening at the distal end. The surgical guide is configured to securely hold tissue while a penetrating device (such as a suture passer) slidingly and removably passes through the surgical guide to penetrate tissue and retrieve suture.