Vessel Sealing Device with Self-Deploying Closure Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vessel-sealing devices for blood vessels require multiple steps, rely on clotting time for hemostasis, and often necessitate sheath changes, leading to increased bleeding and complications.
Innovation Solution
A device with a single-action feature that automatically deploys and seals the blood vessel using a flexible pusher rod and shaft, ensuring consistent sandwich force and independent of the surgeon's feel, without the need for sheath changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure application method is used to achieve hemostasis, then bleeding is stopped, but patient must remain in bed for 8-24 hours requiring overnight hospital stay
Solution Approach 1:
The closure device is self-deploying and self-sealing. The puncture closure element automatically expands upon release from the delivery catheter to engage the vessel wall, and the sealing element is automatically positioned by the pushing rod. This eliminates the need for continuous manual pressure application and extended hospital observation, allowing patients to ambulate sooner while maintaining reliable hemostasis.
2Reliability
If multiple-step closure devices are used, then sealing function is achieved, but device complexity increases and procedure time is extended
Solution Approach 1:
The invention combines the puncture closure element and sealing element into a single integrated assembly that is deployed through one catheter in a single pushing motion. The puncture closure element with its expansion arms and the sealing element are positioned together, allowing simultaneous deployment and sealing action, thereby simplifying the overall device structure and reducing procedural steps.
Solution Approach 2:
The puncture closure element is pre-formed with expansion arms in a compressed state within the delivery catheter. Upon release, it automatically expands to engage the vessel wall before the sealing element is pushed into position. This preliminary positioning and automatic expansion eliminates the need for multiple manual deployment steps, reducing device complexity while maintaining reliable sealing function.
3Manufacturing precision
If sheath change is required for anchor rotation, then proper anchor positioning is achieved, but bleeding increases and procedure time is extended
Solution Approach 1:
The invention extracts the rotation function from the sheath system entirely. The puncture closure element is designed with expansion arms that automatically orient themselves upon deployment, eliminating the need for sheath-based rotation mechanisms. This removes the source of additional bleeding associated with sheath changes while maintaining precise positioning of the closure element against the vessel wall.
4Ease of operation
If manual deployment with surgeon's feel is used, then device deployment is achieved, but consistency and reliability are reduced
Solution Approach 1:
The pushing rod mechanism provides mechanical feedback to the operator during deployment. As the rod pushes the sealing element into position, the operator can feel the resistance changes that indicate proper positioning and engagement of the sealing element with the vessel wall. This tactile feedback ensures consistent deployment force and positioning without requiring advanced surgical skill, thereby improving both ease of operation and reliability of sealing force consistency.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A device and a method for sealing an opening in the wall of a blood vessel is provided. The device includes pushing mechanism, a shaft fixedly connected to the pushing mechanism, a seal assembly attached to the distal end of the shaft, and a pushing rod also engaging the seal assembly, the pushing mechanism moving the pushing rod from a first position to a second position.