Block and Tackle Tissue Closure for Arteriotomy Sealing
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Solution Overview
Problem
Current methods for sealing internal incisions in delicate vessels, such as the Angio-Seal device, require additional steps and components like tamping springs, which complicate the procedure and increase blood loss, necessitating a simpler and more efficient method for compressing internal and external components together.
Innovation Solution
A tissue puncture closure assembly incorporating a block and tackle mechanism that provides a mechanical advantage to compress an anchor and collagen sponge across an arteriotomy, eliminating the need for manual tamping and external springs by translating a proximal force into a multiplied compression force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tamping spring is attached to the suture to maintain opposing forces on the suture and tamping tube, then continuous pressure between the anchor and collagen sponge is achieved, but the device complexity increases and additional steps are required
Solution Approach 1:
The patent removes the tamping spring component entirely from the system. Instead of attaching a spring to maintain continuous pressure, the invention uses the block and tackle mechanism to provide mechanical advantage during the tamping action itself, eliminating the need for an additional spring component that would increase device complexity.
Solution Approach 2:
The block and tackle mechanism is integrated into the suture assembly itself, allowing the suture to serve dual purposes: both as the anchoring element and as the mechanical advantage system for tamping. This self-service approach eliminates the need for separate tamping springs or external compression devices.
2Force
If manual tamping is performed by pushing a tamping tube distally while exerting proximal force on the suture, then the collagen sponge and anchor are compressed together, but the procedure time increases and blood loss increases
Solution Approach 1:
The block and tackle mechanism is pre-configured on the suture before the tamping action begins. This preliminary setup allows the surgeon to immediately apply mechanical advantage during the tamping motion without needing to attach or configure additional components during the procedure, thereby reducing procedure time and minimizing blood loss.
Solution Approach 2:
The block and tackle acts as an intermediary mechanical system between the surgeon's manual force and the compression force applied to the collagen sponge and anchor. By introducing this mechanical advantage system, a small manual force is amplified into a larger compression force, making the tamping action more efficient and faster.
3Reliability
If an extra tamping spring component is used to maintain opposing forces, then continuous pressure is achieved, but the risk of misplacement or misuse increases
Solution Approach 1:
The patent eliminates the tamping spring component entirely, removing the source of potential misplacement or misuse. By integrating the mechanical advantage system directly into the suture assembly through the block and tackle, there are fewer separate components that could be incorrectly handled or positioned during the procedure.
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
This solution simplifies the sealing process, reduces blood loss, and eliminates the extra steps and components required by prior art methods, providing a faster and more reliable hemostasis without the need for prolonged manual or spring-compression.
Implementation Method 1
The block and tackle provides a mechanical advantage for sandwiching the internal and external components together across the internal incision
Data Source
AI summary
A sealing device incorporating a block and tackle for assisting in sealing an internal tissue puncture with an internal and external component. The block and tackle provides a mechanical advantage multiplying an initial force to facilitate compression of the internal and external component together across the internal tissue puncture. The internal and external components may be an anchor and collagen sponge, respectively. The internal tissue puncture is generally an arteriotomy intentionally created in order to perform a vascular procedure. The ability to exert a greater compression force across the arteriotomy eliminates a tamping tube common to prior internal tissue puncture closure devices, and also eliminates additional steps heretofore common to sealing internal tissue punctures. The steps eliminated by application of the principles described herein include tamping the collagen sponge, attaching a tamping spring between a tamping tube and a filament connecting the anchor to the collagen sponge, and later removing the tamping spring.