Hemostasis Valve Iris Seal Single-Handed Operation
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Solution Overview
Problem
Hemostasis valves known in the art often require two hands to operate and tend to leak fluid due to their biased open state, lacking adequate sealing capabilities for a wide range of device diameters and ease of use.
Innovation Solution
A hemostasis valve design incorporating an inner bushing, rotation sleeve, and elastomeric sleeve with a biasing element, allowing the iris valve to transition between open and closed states, enabling single-handed operation and improved sealing through an elastomeric membrane and biasing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hemostasis valves are designed to accommodate a wide range of device diameters, then adaptability is improved, but sealing capability deteriorates
Solution Approach 1:
The patent employs a dynamic iris-valve mechanism that can change its configuration from a relaxed open state to a compressed closed state. The iris valve includes multiple arms that can be dynamically repositioned via a compression member, allowing the valve to adapt its sealing configuration based on the inserted device's diameter, thus maintaining both adaptability and sealing capability
Solution Approach 2:
The valve structure changes its physical parameters (opening diameter, sealing surface contact) in response to the inserted device. The compression member modifies the iris valve's geometric parameters to match the device diameter, enabling the valve to maintain effective sealing across a range of diameters by dynamically adjusting its structural parameters
2Ease of operation
If hemostasis valves are biased to the open state, then ease of operation is improved, but fluid leakage increases
Solution Approach 1:
The valve is pre-configured with a biasing mechanism that automatically establishes the closed sealing position when no device is inserted. The compression member is preliminarily positioned to compress the iris valve arms against the valve body, creating a default sealed state that prevents fluid leakage while allowing easy opening when needed
Solution Approach 2:
The biasing mechanism applies a preliminary counteracting force to prevent the harmful effect of fluid leakage. The compression member exerts a continuous compressive force on the iris valve arms, creating a preliminary sealing action that counteracts any potential fluid leakage before it can occur
3Reliability
If hemostasis valves require two hands to operate, then sealing capability is improved, but ease of operation deteriorates
Solution Approach 1:
The valve mechanism is designed to be self-servicing through the biasing element that automatically maintains sealing pressure. Once the iris valve is opened by inserting a device, the compression member self-adjusts to maintain the appropriate sealing force without requiring continuous manual intervention, allowing secure sealing with one-handed operation
Solution Approach 2:
The compression member acts as an intermediary between the operator's manual input and the iris valve sealing action. It translates a simple opening motion into the complex coordinated movement of multiple valve arms, and subsequently maintains sealing pressure automatically, reducing the operational complexity from two-handed to one-handed operation while preserving sealing reliability
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 design provides enhanced sealing capabilities over a range of diameters and allows for easy, single-handed operation, ensuring effective fluid containment and preventing unwanted leaks.
Implementation Method 1
a biasing element may extend about the inner bushing between the inner bushing and rotation sleeve and may be configured to bias the iris valve towards at least one of a closed state or an open state
Data Source
AI summary
A hemostasis valve is disclosed herein. The hemostasis valve may include an inner bushing, a rotation sleeve, an elastomeric sleeve, and a biasing element. The rotation sleeve may extend about the inner bushing and be rotationally displaceable relative to the inner bushing. The elastomeric sleeve may include a first end operably coupled to the inner bushing, a second end operably coupled to the rotation sleeve, and an iris valve portion. Rotation of the rotation sleeve relative to the inner bushing may cause the iris valve to transition from an open state to a closed state. The biasing element may act between the rotation sleeve and inner bushing to bias the iris valve towards at least one of a closed state or an open state.