Flexible Vascular Closure Deployment for Precise Vessel Sealing
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Solution Overview
Problem
The deployment of vascular stents and other implantable medical devices is often difficult and inaccurate, especially when multiple devices are involved or when the deployment process is complex, necessitating the need for flexible and adjustable deployment devices to improve accuracy.
Innovation Solution
A deployment device with a flexible hollow body and deployment lines that constrain an implantable medical device, allowing it to transition from a constrained to an expanded configuration by retracting the lines, enabling precise deployment and sealing of vascular openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional deployment device is used to deploy vascular stents, then the deployment process becomes complex and difficult, but the accuracy and precision of deployment is poor
Solution Approach 1:
The deployment device is segmented into distinct functional components: a flexible hollow body for navigation, deployment lines for actuation, and constraints for device control. This segmentation allows each component to perform its specific function efficiently, improving deployment accuracy while keeping the overall system manageable despite the complexity of the procedure
Solution Approach 2:
Deployment lines serve as intermediaries that transmit control forces from the operator to the implantable device. These lines enable precise control of the device deployment process by acting as a mechanical transmission medium between the operator's actions and the device's response, thereby improving deployment precision
2Stability of the object's composition
If multiple constraints are used to control the implantable medical device, then the constrained configuration is more stable, but the deployment process requires more steps
Solution Approach 1:
Multiple constraints are merged into a coordinated system that works together to maintain the device in a stable constrained configuration. The constraints are integrated with the deployment lines and hollow body to provide collective stability while being controlled through a unified deployment mechanism, reducing the perceived number of separate steps required
Solution Approach 2:
The device is pre-configured with multiple constraints that are already in place to maintain stability during delivery. This preliminary arrangement of constraints ensures stability is maintained throughout the delivery process without requiring additional stabilization steps during deployment
3Length of moving object
If the implantable medical device is constrained during delivery, then the device can be delivered through narrow vasculature, but the device cannot expand until deployment
Solution Approach 1:
The device transitions from a static constrained configuration during delivery to a dynamic expanded configuration at the deployment site. The deployment lines provide dynamic control, allowing the device to change from a compressed deliverable state to an expanded functional state through controlled retraction of the deployment lines
Solution Approach 2:
The implantable device is nested within the hollow body during delivery, with the constrained device fitting inside the delivery system. This nested configuration allows the device to be delivered through narrow vasculature while maintaining the capability to expand to its full functional size upon deployment through the release mechanism
Data Source
AI summary
An implantable medical device for closure of a tissue tract/opening in a vessel wall includes a constraint disposed around and constraining the implantable medical device in a constrained configuration and one or more deployment lines attached to the constraint. A flexible hollow body is coupled proximate a midpoint of the implantable medical device. The implantable medical device and flexible hollow body are operable to transition (pivot) from a parallel, side-by-side arrangement to be substantially angled relative to one another. Retracting the one or more deployment lines causes the constraint to release the implantable medical device to transition from the constrained configuration to an expanded configuration.