Disengagable Cam System for Tissue Puncture Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tissue puncture closure devices face challenges in ensuring proper deployment and seating of sealing plugs, often resulting in incomplete sealing and delayed bleeding due to manual compaction requirements and sheath removal issues.
Innovation Solution
A tissue puncture closure device with an automatic compaction system using a spool assembly and suture cam path to drive the compaction member assembly, allowing for axial compression of the sealing plug toward an anchor, and a release mechanism for easy separation, facilitating full retraction and complete closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual compaction is used with sheath removal, then the sealing plug can be deployed, but the sealing plug may be displaced proximally resulting in incomplete sealing
Solution Approach 1:
The compaction tube is pre-positioned within the device sheath and automatically advanced to compact the sealing plug before the sheath is removed. This preliminary compaction action ensures the sealing plug is properly seated against the tissue puncture site, preventing proximal displacement and incomplete sealing that would occur if compaction were delayed until after sheath removal.
Solution Approach 2:
The system performs self-compaction through the automatic advancement mechanism that propels the compaction tube forward without requiring external manual intervention. The spring-loaded or actuated mechanism automatically executes the compaction function, eliminating the need for separate manual compaction steps and reducing operational complexity.
2Ease of operation
If the sheath is removed before compaction, then the compaction tube can be accessed, but the sealing plug displacement risk increases
Solution Approach 1:
The system reverses the conventional sequence by performing compaction before sheath removal. The compaction tube is advanced to compact the sealing plug while still within the protective environment of the device sheath, ensuring proper positioning before exposure. This eliminates the risk of proximal displacement that occurs when the sheath is removed first and manual compaction is attempted afterward.
3Reliability
If automatic compaction is implemented, then sealing reliability improves, but device complexity increases
Solution Approach 1:
The compaction tube is integrated within the device sheath structure, combining multiple functions into a unified assembly. The compaction mechanism is merged with the delivery system, eliminating the need for separate compaction devices and reducing overall system complexity while maintaining automatic compaction capability.
Solution Approach 2:
The automatic compaction mechanism uses self-actuating components such as springs or shape memory materials that automatically advance the compaction tube without requiring complex external control systems. This self-service approach achieves reliable automatic compaction while minimizing the complexity of the driving mechanism.
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
The automatic compaction system ensures reliable and efficient sealing plug deployment, reducing the risk of incomplete sealing and bleeding, while allowing for easy separation from the closure device, enhancing hemostasis in vascular procedures.
Implementation Method 1
The compaction member assembly may include a compaction tube and a coil, wherein the coil is structured and arranged to apply an axially directed compressive force to the compaction tube
Implementation Method 2
The spool assembly includes a plurality of post members. The suture is wound about the post members to define a suture cam path. Unspooling the suture along the suture cam path provides driving of the compaction member assembly.
Data Source
AI summary
A method and apparatus for sealing a puncture or incision formed percutaneously in a tissue. The apparatus includes an anchor, a sealing plug, a suture, a compaction member assembly, a spool assembly, and a release member. The suture is positioned between the sealing plug and the anchor. The compaction member assembly is structured and arranged to apply an compressive force to compact the sealing plug toward the anchor. The spool assembly includes a plurality of post members, and the suture is wound about the post members to define a suture cam path. Unspooling the suture along the suture cam path provides driving of the compaction member assembly. The release member is operable to move the post members to release the suture member from the spool assembly.