Automatic Vessel Sealing Device with Spring-Activated Pusher
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Solution Overview
Problem
Current vessel closure devices rely on clotting time for hemostasis, require multiple steps and sheath changes, and lack reliable automatic deployment, leading to prolonged recovery times and potential bleeding complications.
Innovation Solution
A device with an automatic mechanism that includes a shaft, seal assembly, and pushing rod, allowing for immediate and secure sealing of blood vessel openings without sheath change, utilizing a spring-activated pusher to engage both interior and exterior vessel surfaces for rapid hemostasis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure application method is used for vessel closure, then bleeding is stopped through clotting, but patient recovery time is prolonged (15 minutes to over an hour in bed with 8-24 hour bandage requirement)
Solution Approach 1:
The closure device is pre-loaded into the sheath in a compressed state before the procedure. The seal assembly is prepared in advance and positioned within the sheath, ready for immediate deployment when the sheath is removed, eliminating the need for time-consuming manual clotting procedures
Solution Approach 2:
The closure device automatically deploys and seals the vessel opening upon sheath removal without requiring manual intervention for clotting. The device self-actuates to provide immediate hemostasis, freeing the patient from prolonged bed rest and bandage requirements
2Reliability
If manual deployment of closure devices is used, then sealing can be achieved, but multiple steps and sheath changes are required increasing procedure complexity
Solution Approach 1:
The closure device integrates multiple functions into a single unit: the seal assembly, deployment mechanism, and release system are combined into one device that remains in the sheath throughout the procedure. This eliminates the need for sheath changes and reduces the number of separate steps required
Solution Approach 2:
The single sheath serves multiple purposes: it protects the closure device during insertion, contains the seal assembly in a ready-to-deploy state, and acts as the delivery system. The closure device itself provides both sealing and automatic deployment functions, reducing overall procedural complexity
3Ease of operation
If manual deployment without automatic mechanism is used, then device can be operated simply, but deployment reliability and precision are reduced
Solution Approach 1:
The automatic deployment mechanism responds to the removal of the sheath by detecting the change in constraint forces. This feedback triggers the release of the seal assembly, ensuring reliable and precise deployment timing without requiring complex manual activation procedures
Solution Approach 2:
The deployment mechanism automatically actuates upon sheath removal without requiring manual intervention. The system self-regulates the deployment timing and force, providing reliable and precise seal placement while maintaining operational simplicity
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
Enables rapid and reliable vessel sealing independent of clotting time, reducing recovery time and minimizing bleeding complications through automatic deployment and release, with fewer steps and no need for sheath replacement.
Implementation Method 1
utilizing a spring-activated pusher to engage both interior and exterior vessel surfaces for rapid hemostasis
Data Source
AI summary
A device and a method for sealing an opening in the wall of a blood vessel is provided. The device includes an automatic mechanism, a shaft fixedly connected to the automatic mechanism, a seal assembly attached to the distal end of the shaft, and a pushing rod also engaging the seal assembly, the automatic mechanism moving the pushing rod from a first position to a second position in response to the shaft being pulled distally a predetermined distance.