Long Stylet Cannula Assembly for Tissue Piercing
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Solution Overview
Problem
Conventional cannula-stylet assemblies require multiple steps for positioning and verification, increasing the risk of complications and contamination during tissue piercing procedures due to the need for frequent disassembly and reassembly of the cannula, stylet, and gripping device.
Innovation Solution
A cannula-stylet assembly with a stylet significantly longer than the cannula, allowing the stylet to extend through the cannula and gripping device, enabling the cannula to be manipulated and positioned without disassembly, while the stylet is removed for verification, reducing the number of steps and minimizing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional pierce needles or suture anchors are used, then tissue piercing or anchoring can be achieved, but the procedures require multiple separate steps and instruments increasing procedural complexity and time
Solution Approach 1:
The patent combines the piercing function and anchoring function into a single integrated device. The tissue piercing assembly includes a needle portion for piercing and a distal portion that provides anchoring, eliminating the need for separate piercing and anchoring instruments. This merging of functions directly reduces the number of instruments required and streamlines the procedural workflow.
Solution Approach 2:
The single instrument performs multiple functions: it pierces the tissue, delivers the anchor, and provides anchoring capability. The device is designed to accomplish what previously required multiple specialized instruments, making it a multi-functional tool that improves procedural efficiency while reducing instrument complexity.
2Loss of time
If multiple separate instruments are used for piercing and anchoring, then specific functions can be performed, but the learning curve increases and procedural time extends
Solution Approach 1:
By merging the piercing and anchoring operations into a single instrument, the procedure is completed in fewer steps. The single instrument eliminates the need to switch between multiple instruments, directly reducing procedural time and simplifying the learning curve for operators.
3Strength
If conventional anchors requiring separate delivery are used, then anchoring strength can be achieved, but the procedure becomes more invasive and complex
Solution Approach 1:
The anchoring function is merged with the piercing needle into a single integrated device. The anchor is delivered through the needle lumen and deployed at the target site, eliminating the need for separate anchor delivery instruments. This reduces procedural invasiveness while maintaining anchoring strength.
4Ease of manufacture
If separate piercing and anchoring steps are performed, then each function can be optimized, but overall procedure cost and resource utilization increase
Solution Approach 1:
The patent reduces the total number of components by merging the piercing needle and anchor delivery system into a single integrated assembly. This eliminates the need for multiple separate components, simplifying the overall device structure and reducing manufacturing complexity while maintaining the functional capabilities of both piercing and anchoring.
Data Source
AI summary
A cannula-stylet assembly for piercing tissues of a subject's body includes a stylet that is significantly longer than the cannula. The length of the stylet enables introduction of the stylet through the length of both the cannula and a gripping device that has been coupled to a proximal end of the cannula. A medical piercing system may include a cannula-stylet assembly with a long stylet and a gripping device that may remain assembled with the cannula when the stylet is removed from the cannula or a gripping device that remains assembled with a stylet of a conventionally configured cannula-stylet assembly when the stylet is removed from the cannula.