Hemostasis Valve Plunger Locking Mechanism
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Solution Overview
Problem
Current medical devices, such as hemostasis valves, face challenges in effectively preventing fluid leakage during medical procedures, particularly when dealing with high-pressure fluids, and require complex manual operation to open and close seals, often necessitating multiple hands.
Innovation Solution
A hemostasis valve design featuring a main body with a distal and proximal end, a plunger that shifts between positions to open and close seals, and locking mechanisms allowing single-handed operation, including a nut and locking members to maintain the plunger position and seal configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a hemostasis valve uses a complex manual operation mechanism to open and close seals, then the seal control precision is improved, but the device complexity and ease of operation deteriorate
Solution Approach 1:
The plunger mechanism is designed to automatically engage with the locking member through spring-loaded interaction. When the plunger is pushed distally, it automatically opens the seal and locks into position without requiring additional manual steps. The spring force provides automatic reset functionality, making the system self-servicing rather than requiring complex multi-step manual operation.
Solution Approach 2:
The locking function is extracted as a separate locking member that engages with the plunger through a simplified interface. Rather than integrating complex locking mechanisms into the seal structure itself, the locking function is separated into a distinct component that interacts with the plunger through radial engagement, simplifying the overall operation.
2Reliability
If a hemostasis valve uses a complex manual operation mechanism to open and close seals, then the seal reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The spring-loaded plunger mechanism automatically locks into the locking member when pushed distally, providing reliable seal engagement without requiring the user to perform multiple manual steps. The spring force ensures automatic reset to the closed position, maintaining reliability while enabling simple one-handed operation.
Solution Approach 2:
The plunger is designed with dynamic locking capability where the locking member can engage or disengage based on plunger position. This dynamic interaction allows the system to maintain reliable sealing when needed while enabling easy release and repositioning during single-handed operation.
3Ease of operation
If a hemostasis valve uses a plunger mechanism to open and close seals, then the ease of operation is improved, but the fluid leakage risk worsens due to potential improper sealing
Solution Approach 1:
The spring-loaded plunger automatically locks into the locking member when pushed distally, ensuring positive engagement and reliable seal opening. The spring force provides automatic reset to ensure the seal returns to its closed position, preventing fluid leakage through improper sealing while maintaining easy one-handed operation.
Solution Approach 2:
The locking member provides mechanical feedback through engagement with the plunger, confirming when the seal is properly opened or closed. This feedback mechanism ensures that the plunger reaches the correct position for reliable sealing, preventing fluid leakage while maintaining simple operation.
4Stability of the object's composition
If a hemostasis valve uses locking members to maintain plunger position, then the stability of plunger position is improved, but the device complexity worsens
Solution Approach 1:
The locking function is extracted as a separate locking member that interacts with the plunger through a simple radial engagement interface. This separation allows the locking mechanism to provide stable position maintenance without adding significant complexity to the overall device structure.
Solution Approach 2:
The locking member automatically engages with the plunger when the plunger is pushed distally, providing self-servicing locking functionality. The spring force ensures automatic engagement and disengagement, maintaining plunger position stability without requiring complex manual locking steps.
Data Source
AI summary
Hemostasis valves and methods for making and using hemostasis valves are disclosed. An example hemostasis valve may include a main body having a distal end region and a proximal end region. A first seal member may be disposed within the proximal end region of the main body. A plunger may be coupled to the proximal end region of the main body. The plunger may be designed to shift between a first position and a second position. A first locking member may be disposed along the proximal end region of the main body. A second locking member may be disposed along the plunger. The second locking member may be designed to engage the first locking member.