Pivoting Stay Insertion Tool for Adventitial Placement
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Solution Overview
Problem
Existing stay insertion tools face difficulties in properly positioning a number of stays beneath the adventitial layer of tubular anatomical structures, which discourages their use despite their significant medical utility due to the need for repeated insertions and potential tissue disruption.
Innovation Solution
A surgical hand tool designed to facilitate the precise and efficient insertion of stays beneath the adventitia using a pivotable head that can angle and reach deeper segments through small incisions, allowing for rapid and secure positioning with the option of coating each stay with medication and adhesive during ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated insertions are used to position multiple stays, then stays can be inserted into the adventitial layer, but tissue disruption increases and procedural time extends
Solution Approach 1:
The insertion tool is divided into distinct functional segments: a deployment element that holds multiple stays, an ejection mechanism that releases them sequentially, and a coating mechanism that applies adhesive and medication. This segmentation allows multiple stays to be positioned in a single procedural pass rather than repeated insertions, reducing tissue disruption while maintaining positioning accuracy.
Solution Approach 2:
Multiple stays are pre-loaded into the deployment element before insertion. The coating mechanism applies adhesive and medication to the stays as they are ejected, preparing them in advance for immediate bonding to the adventitial layer. This preliminary preparation eliminates the need for repeated tool insertions to position additional stays.
2Ease of operation
If manual insertion with surgical pliers is used, then stays can be positioned one at a time, but procedural duration increases
Solution Approach 1:
The tool merges multiple functions into a single device: the deployment element holds multiple stays, the ejection mechanism releases them sequentially with simple actuation, and the coating mechanism applies adhesive and medication simultaneously. This integration maintains operational simplicity while dramatically increasing procedural speed compared to manual insertion of individual stays.
Solution Approach 2:
The deployment element is designed to eject multiple stays in continuous sequence without requiring tool reinsertion or resetting between each stay. The coating mechanism operates continuously during ejection, applying adhesive and medication to each stay as it is deployed. This continuous action maintains ease of operation while eliminating the time losses associated with manual, discrete insertion steps.
3Productivity
If stays are inserted without adhesive coating, then insertion is faster, but stay retention and security decrease
Solution Approach 1:
An adhesive coating is applied as an intermediary substance between the stay and the adventitial layer. The coating mechanism deposits this adhesive onto the stay surface during ejection, creating a bonding interface that secures the stay to the tissue. This intermediary layer maintains insertion speed while ensuring reliable retention, eliminating the trade-off between speed and security.
Solution Approach 2:
The adhesive coating is applied preliminarily to the stay surface before it contacts the adventitial layer. This pre-coating ensures that the stay is ready for immediate bonding upon insertion, eliminating the need for separate coating steps that would slow down the procedure. The medication coating is also applied in advance, preparing the site for therapeutic effect.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates the quick and proper insertion of stays with minimal tissue disruption, reducing procedural duration and anesthesia time, enabling targeted medication release and stenting without luminal entry, thus enhancing treatment efficacy and patient comfort.
Implementation Method 1
A surgical hand tool designed to facilitate the precise and efficient insertion of stays beneath the adventitia using a pivotable head that can angle and reach deeper segments through small incisions
Implementation Method 2
the stay insertion tool incorporates a magnet to retrieve a stay that does penetrate
Implementation Method 3
stay insertion tools incorporate means for laying down a surgical grade adhesive such a cyanoacrylate cement to each stay as it is ejected to bond each to the tissue investing it
Data Source
AI summary
Described are surgical hand tools to facilitate the proper implantation beneath the outer layer of ductus to include vessels, the trachea, esophagus, and ureters, as well as glands, organs, or other tissue of medicinal, magnetically susceptible, magnetized, and/or radiation-emitting stays, or ribs—arcuate bands sized in proportion to the substrate structure which incorporate substances for implantation toward the surface of the substrate. Stay insertion tools allow access to and expedite stay insertion into deeper tissue through a small, or ‘keyhole’ incision at the body surface, eliminating the need for more extensive incision, reducing procedural duration, and can coat each stay with medication and/or an adhesive as each is ejected. Susceptible and magnetized stays allow extraluminal stenting, which avoids the lumen, allowing the in situ treatment of a ductus which malacotic, infected, or otherwise diseased, would likely incur incisions, perforations, and/or abrasions during transluminal treatment.