Endoscope Cleaning Valve Stem and Seal Flushing Design
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Solution Overview
Problem
Reusable cleaning valves for medical devices, such as endoscopes, require frequent cleaning and maintenance, increasing operational costs and complexity, while single-use valves do not effectively address clogging issues during procedures.
Innovation Solution
A valve design with a valve stem and multiple seals that can transition between closed and open positions to prevent fluid flow in one direction, allowing for easy flushing of air or water channels without the need for extensive operator interaction or additional processing, featuring a channel seal, actuation mechanism, and biasing member for efficient fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a reusable cleaning valve is used, then the valve can be used multiple times, but the valve requires frequent cleaning and maintenance which increases operational costs and complexity
Solution Approach 1:
The cleaning valve is divided into separate components including a valve body, valve stem, and seals that can be easily disassembled. This segmentation allows each component to be independently cleaned and maintained, reducing the overall complexity of valve maintenance while extending service life through systematic care of individual parts.
Solution Approach 2:
The valve design incorporates self-cleaning features where the valve stem and seals are configured to allow fluid flow paths that facilitate automatic flushing of debris during normal operation. This self-service capability reduces the frequency and complexity of manual cleaning operations required for reusable valves.
2Ease of manufacture
If a single-use valve is used, then maintenance costs are reduced, but the valve does not effectively address clogging issues during procedures
Solution Approach 1:
The valve is designed as a disposable component with simplified construction using inexpensive materials such as plastic or polymer components. This allows the valve to be discarded after single use, eliminating maintenance costs while ensuring reliable clogging prevention during the procedure through adequate initial design for the intended service period.
Solution Approach 2:
The valve design incorporates larger internal diameters and smoother internal surfaces compared to reusable valves, optimizing fluid flow characteristics for single-use applications. These parameter changes effectively prevent clogging during the procedure by reducing flow resistance and debris accumulation, while the simplified design accepts disposal after use.
3Reliability
If operator interaction is increased to manually flush channels, then clogging can be prevented, but operational efficiency decreases
Solution Approach 1:
The valve design incorporates pre-configured flush ports and channels that are positioned to automatically receive and direct flushing fluid through the air and water channels during reprocessing. This preliminary arrangement of flushing pathways eliminates the need for complex manual manipulation while ensuring effective channel clearing, thereby maintaining both reliability and productivity.
Solution Approach 2:
The valve stem acts as an intermediary component that translates simple operator button depression into comprehensive flushing action throughout the endoscope channels. This mechanical mediation allows minimal operator interaction to trigger automated flushing sequences, maintaining reprocessing efficiency while ensuring thorough channel cleaning for clogging prevention.
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 valve effectively reduces operator interaction and maintenance costs by allowing for efficient flushing of air or water channels, preventing clogging and simplifying the reprocessing of medical devices, while being suitable for both single-use and reusable applications.
Implementation Method 1
at least one biasing member positioned within the valve cylinder and configured to bias the valve stem towards a first position
Data Source
AI summary
A valve may have a fluid inlet and a fluid outlet. The valve may include a valve stem having a lumen extending from a first opening at a proximal portion of the valve stem to a second opening at a distal end of the valve stem. A plurality of seals may be positioned relative to the valve stem. The valve stem and seals may be configured so that a fluid entering the inlet is prevented from flowing to the outlet in a first position of the valve stem and relative to the inlet and the outlet. The valve stem and the seals may be configured so that a fluid entering the inlet flows to the outlet in a second position of the valve stem relative to the inlet and the outlet, the second position being more distal than the first position relative to the inlet and the outlet.