Vascular Puncture Sealant Compression via Auto-Advance Mechanism
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Solution Overview
Problem
Current methods for sealing vascular punctures are time-consuming, expensive, and uncomfortable for patients, requiring prolonged immobilization and risking hematoma due to inefficient hemostasis.
Innovation Solution
An apparatus and method using an elongate member with an expandable member and a cartridge containing a sealant and pusher member, where an auto advance device compresses the sealant between the pusher member and the expandable member to achieve hemostasis within the puncture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external pressure is applied manually or using sandbags to seal the puncture, then hemostasis is achieved, but the procedure becomes time-consuming and requires prolonged patient immobilization
Solution Approach 1:
The sealant material is delivered automatically through the puncture site using a self-actuating mechanism that requires no manual intervention during delivery. The system uses stored mechanical energy (spring) to automatically push the sealant into the puncture and advance the elongate member to the vessel, making the hemostasis process self-service and eliminating the need for prolonged manual compression.
Solution Approach 2:
The sealant is pre-loaded into the cartridge and the pusher member is pre-positioned against it before the procedure. The spring is pre-compressed to store energy. When activated, these pre-positioned elements automatically deliver the sealant and advance the elongate member, eliminating the need for time-consuming manual compression and achieving rapid hemostasis.
2Reliability
If manual compression is used to achieve hemostasis, then bleeding is controlled, but patient comfort deteriorates due to discomfort and immobilization requirements
Solution Approach 1:
The automated delivery system performs the hemostasis function without requiring patient cooperation or immobilization. The spring-loaded mechanism self-actuates to deliver sealant and advance the elongate member, making the procedure patient-friendly and eliminating discomfort associated with manual compression and prolonged immobilization.
3Productivity
If rapid sealant delivery is implemented, then procedure time is reduced, but device complexity increases due to auto advance mechanism
Solution Approach 1:
The device is divided into distinct functional modules: a cartridge containing sealant and pusher member, a separate spring mechanism for actuation, and an elongate member for advancement. This segmentation allows each component to perform its function independently and simplifies manufacturing and assembly while achieving rapid automated delivery.
Solution Approach 2:
The pusher member acts as an intermediary element between the spring energy source and the sealant. It converts the spring's expansion force into directed linear motion that pushes the sealant out of the cartridge and advances the elongate member into the vessel, simplifying the overall actuation mechanism while achieving rapid delivery.
4Extent of automation
If automated pusher mechanism is used, then manual intervention is reduced, but manufacturing complexity increases
Solution Approach 1:
The automated delivery system is divided into separable components (cartridge, pusher member, spring, elongate member) that can be manufactured independently using standard manufacturing processes. This segmentation reduces overall manufacturing complexity while achieving automated delivery functionality.
Solution Approach 2:
The cartridge and its contents (sealant and pusher member) are designed as a disposable single-use unit. This eliminates the need for complex cleaning, sterilization, and reassembly processes, simplifying manufacturing while providing automated delivery. The spring and elongate member can be reused if designed to withstand sterilization.
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
Facilitates rapid and effective hemostasis, reducing patient discomfort and immobilization time, while minimizing the risk of hematoma by automatically advancing the sealant to seal the puncture.
Implementation Method 1
an expandable member on the distal end
Implementation Method 2
an auto advance device compresses the sealant between the pusher member and the expandable member to achieve hemostasis
Data Source
AI summary
An apparatus for sealing a puncture includes a cartridge, a pusher member, a sealant, and a tamping device on a proximal end of the cartridge. During use, the cartridge, sealant, and pusher member are advanced over a positioning member and into the puncture by advancing a cartridge hub carrying the tamping device. When further distal advancement of the cartridge is limited, the cartridge hub is further advanced, activating the tamping device, and causing the pusher member to advance relative to the sealant to compress the sealant within the puncture.