Vascular Closure Locking Assembly Tension Release
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Solution Overview
Problem
Current vascular closure devices face challenges in efficiently sealing vascular punctures with existing locking mechanisms, which often require high forces and lack efficient deployment mechanisms for toggle orientation and tension application.
Innovation Solution
A vascular closure device with a deployment assembly that includes a tamper and a locking assembly, where the tamper is slidable along a suture and inhibited from advancing until a threshold tension is applied, allowing for efficient sealing and deployment of the toggle against the vessel wall, and a locking mechanism that transitions from locked to unlocked configurations based on tension levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is used to secure the tamper, then the sealing reliability is improved, but the force required for deployment increases
Solution Approach 1:
The locking assembly transitions from a locked configuration to an unlocked configuration in response to tension applied to the suture, making the locking mechanism dynamic rather than static. This allows the tamper to be securely held during delivery and then released when appropriate tension is applied, reducing the force needed for deployment while maintaining sealing reliability
Solution Approach 2:
The locking mechanism responds to changes in tension parameters on the suture. When threshold tension is applied, the locking assembly changes its state from locked to unlocked, allowing the tamper to advance. This parameter-based control enables reliable sealing while reducing deployment force requirements
2Manufacturing precision
If the tamper is restrained until threshold tension is applied, then the toggle orientation control is improved, but the device complexity increases
Solution Approach 1:
The locking assembly is pre-configured to restrain the tamper in a held position before tension is applied. This preliminary restraint ensures proper toggle orientation is maintained during delivery and only releases when the correct tension condition is met, improving orientation control without requiring complex active control systems
Solution Approach 2:
The deployment assembly uses the tension applied during normal sealing operation to automatically trigger the unlocking of the tamper. The system serves itself by using the necessary therapeutic tension to also activate the deployment mechanism, improving orientation control while minimizing additional complexity
Data Source
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AI summary
A vascular closure device includes a deployment assembly, a sealing unit carried by the deployment assembly, and a tamper carried by the deployment assembly and that is disposed along a suture with respect to the sealing unit. The vascular closure device includes a locking assembly coupled to the tamper so as to selectively inhibit advancement of the tamper along the suture in the distal direction toward the sealing unit. The locking assembly is adapted to transition from A) a locked configuration where the tamper is inhibited from sliding along the suture, into B) an unlocked configuration where the tamper is slidable along the suture in the distal direction and into contact with the sealing unit.