Coiled Tamping Device for Vascular Closure Sealing
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Solution Overview
Problem
Current vascular closure devices face challenges in ensuring proper deployment and seating of sealing plugs at tissue puncture sites, often resulting in partial seals and bleeding due to manual tamping requirements that can cause the plug to retract when the sheath is removed.
Innovation Solution
A tissue puncture closure device with a coiled tamping mechanism that automatically drives a sealing plug toward an anchor upon withdrawal, featuring a shaper that transforms the tamping device from a flexible coiled configuration to a stiff configuration to ensure proper seating and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual tamping is used to deploy the sealing plug, then the tamping procedure can be performed, but the sealing plug may retract from the tissue puncture when the sheath is removed, resulting in partial seal and bleeding
Solution Approach 1:
The tamping device is configured to automatically perform the tamping function without requiring manual intervention. The device uses its own structural design where the tamping element is self-actuated during the deployment process, eliminating the need for separate manual tamping operations that could cause plug retraction
Solution Approach 2:
The sealing plug is tamped into position before the sheath is removed from the tissue puncture. The device ensures the plug is properly seated and secured in advance, preventing retraction when the sheath is withdrawn. This preliminary tamping action guarantees complete sealing before exposure
2Ease of operation
If the sheath is removed before tamping the sealing plug, then the tamping tube can be exposed for manual grasping, but the sealing plug may be retracted from the tissue puncture, hindering subsequent placement
Solution Approach 1:
The device performs self-tamping without requiring external manual manipulation of a tamping tube. The tamping action is integrated into the device's own deployment mechanism, eliminating the need to expose a separate tamping tube for manual grasping while maintaining precise plug placement
Solution Approach 2:
The tamping function is merged with the deployment mechanism itself. The tamping element and deployment structure are combined into a single integrated device, allowing the tamping action to occur automatically during the deployment process without requiring separate manual intervention
3Force
If a straight stiff tamping device is used, then effective tamping can be achieved, but the device cannot be coiled or compacted for insertion through the sheath
Solution Approach 1:
The tamping device features a dynamic structure that can change its configuration from a compact coiled state during insertion to a straight stiff state during tamping. This dynamic transformation allows the device to adapt its physical properties based on the operational phase, achieving both compactness for insertion and stiffness for effective tamping
Solution Approach 2:
The tamping device is designed with segmented or modular components that can be arranged in a coiled configuration for compact insertion, then unfolded or extended to form a straight stiff structure for effective tamping. The segmentation allows the device to transition between compact and extended states
Data Source
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AI summary
A method and apparatus for sealing a puncture or incision formed percutaneously in tissue separating two internal portions of the body of a living being with an anchor, a sealing plug and a filament connecting the anchor and sealing plug. The method and apparatus provide for a tamping device that is coilable in some configurations and stiff and straight in other configurations. The coilable tamping device may also automatically tamp the sealing plug when the apparatus is withdrawn from the puncture site. The automatic uncoiling and tamping is facilitated by transducing a motive force generated by the withdrawal of the apparatus into a tamping force.