Counter-Rotating Hemostatic Valve for Rapid Sealing
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Solution Overview
Problem
Current hemostatic valves face challenges in sealing over a wide range of device sizes and cross-sectional profiles without imposing excess friction and require excessive actuation travel for activation, leading to inefficiencies in medical procedures.
Innovation Solution
A counter-rotating hemostatic valve apparatus featuring a flexible sealing tube with attached mechanisms and an actuator that counter-rotates these mechanisms, twisting the tube to create a leak-proof seal, allowing for intuitive and rapid activation with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sealing bodies are designed to seal effectively over a wide range of device cross-sectional profiles, then sealing versatility is improved, but friction on traversing devices increases
Solution Approach 1:
The sealing tube incorporates a friction reduction feature (such as a lubricious coating or textured surface) at the specific location where devices traverse, while maintaining sealing capability at other locations. This allows the seal to adapt to different device profiles without generating excessive friction on the traversing devices.
Solution Approach 2:
The sealing tube is designed with dynamic characteristics that allow it to adjust its sealing properties based on the presence and movement of devices. The tube can deform or change its sealing mechanism activation state to accommodate traversing devices while maintaining the seal, reducing friction during device passage.
2Adaptability or versatility
If active valves are designed to seal effectively over a wide range of device cross-sectional profiles, then sealing versatility is improved, but actuation travel distance increases
Solution Approach 1:
The sealing mechanism transitions from a linear actuation approach to a rotational actuation approach. By rotating the sealing tube rather than moving it linearly, the valve achieves sealing across different device profiles without requiring extended actuation travel, as rotation provides more efficient control over the sealing circumference.
Solution Approach 2:
The invention replaces the traditional linear mechanical actuation system with a rotational actuation system. This substitution allows the sealing tube to be activated by rotation rather than linear displacement, reducing the actuation travel distance while maintaining the ability to seal effectively over a wide range of device cross-sectional profiles.
3Reliability
If sealing mechanisms are designed for wide device compatibility, then sealing effectiveness is improved, but activation time increases
Solution Approach 1:
The sealing tube is activated by rotation rather than linear movement, which allows for faster activation. The rotational motion can be applied more quickly and with less travel distance, reducing activation time while maintaining sealing effectiveness across various device sizes and profiles.
Solution Approach 2:
The actuation mechanism utilizes rotational parameters (angular displacement, rotational speed) instead of linear parameters (displacement, velocity). This parameter change enables faster activation since rotational motion can be achieved more quickly and with shorter stroke, thereby reducing activation time while preserving reliable sealing.
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 solution provides a faster and more efficient sealing mechanism with reduced blood loss during activation, enabling easy use and effective sealing across various device sizes and profiles with minimal actuation travel.
Implementation Method 1
the actuator is capable of counter rotating the first and second rotation mechanisms... When the first and second mechanisms are counter rotated, said flexible sealing tube is twisted causing said tube to collapse and create a leak proof seal
Data Source
AI summary
A hemostatic valve apparatus used in medical procedures that provides rapid activation of a sealing mechanism resulting in lower blood loss during use of the sealing device. The valve apparatus incorporates an actuator and two mechanisms that counter-rotate opposite ends of a sealing tube.