Bifluidic Valve Seals for Endoscope Insufflation and Irrigation
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Solution Overview
Problem
Existing endoscope valves lack the ability to seamlessly switch between insufflation and irrigation configurations, leading to inefficiencies and potential complications during medical procedures.
Innovation Solution
The development of a bifluidic valve that is selectively configurable to insufflating, irrigating, and vented configurations, utilizing a valve seal with resiliently flexible flaps that change shape in response to pressure differentials, allowing for precise control of gas and liquid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional endoscope valves are used, then the structure is simple, but the ability to switch between insufflation and irrigation configurations is poor
Solution Approach 1:
The valve assembly is designed as a multi-functional device that can perform both insufflation and irrigation functions through a single integrated structure. The valve spool with different positions and the valve seal with flexible flaps enable the same valve to control both gas flow (insufflation) and liquid flow (irrigation), eliminating the need for separate valves for each function.
Solution Approach 2:
The valve incorporates dynamic elements including a movable valve spool that can be positioned at different locations (first position for insufflation, second position for irrigation) and a valve seal with flexible flaps that can deform between deformed and relaxed shapes. These dynamic components allow the valve to adapt its configuration based on the required function, enabling seamless switching between insufflation and irrigation modes.
2Manufacturing precision
If a resiliently flexible valve seal with deforming flaps is used, then the control precision of fluid flow is improved, but the manufacturing complexity increases
Solution Approach 1:
The valve seal's functionality is achieved through parameter changes in its physical state. The flexible flaps can change their shape (deformed vs. relaxed) in response to pressure differentials, and the valve spool can be positioned at different locations. These parameter changes enable precise control of fluid flow paths without requiring complex mechanical mechanisms, making the design achievable through standard manufacturing techniques while maintaining high control precision.
3Reliability
If the valve seal flaps are kept in deformed shape for insufflation, then the gas flow control is improved, but the transition to irrigation configuration becomes difficult
Solution Approach 1:
The valve seal is designed to automatically adjust its configuration based on the operating conditions. When the valve spool moves between positions or when pressure differentials change during operation, the flexible flaps self-adjust between deformed and relaxed shapes without requiring manual intervention. This self-service mechanism ensures reliable gas flow control during insufflation while enabling easy transition to irrigation configuration when needed, as the system automatically adapts to the current operational requirements.
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
This solution enables efficient and precise control of fluid flow within endoscopes, enhancing procedural accuracy and safety by allowing seamless transitions between insufflation and irrigation, thereby improving diagnostic and therapeutic outcomes.
Implementation Method 1
the plurality of flaps are resiliently flexible between a deformed shape and a more relaxed shape... the plurality of flaps are in the deformed shape when the bifluidic valve is in the insufflating configuration... the plurality of flaps are in the more relaxed shape when the bifluidic valve is in the irrigating configuration
Data Source
AI summary
An endoscope (e.g., a duodenoscope) includes a bifluidic valve for controlling the flow of water and air through a flexible tubular probe to respectively irrigate or insufflate an internal cavity of a patient. Some examples of the bifluidic valve include a flexible valve seal that allows air to flow in one direction but not in reverse. Different examples of the valve seal include various features, such as a set of overlapping flexible flaps arranged in a spiral, a rubber-like disc with an array of cross-slit perforations that open in response to a positive pressure differential across the disc, a resiliently expandable cone with multiple concentric ridges, a valve spool encircled by an elastic tubular piece that can expand radially to open an air passageway in the valve spool, and an elastic tube that in reaction to being compressed or otherwise shortened bulges radially outward to block an annular air passageway.