Disposable Fluid Cassette Retention Mechanism for Endoscopic Pumps
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Solution Overview
Problem
Existing fluid management systems for endoscopic procedures lack alternative configurations for components, which can complicate their use and maintenance.
Innovation Solution
A disposable fluid cassette and associated method for installing and removing it from a fluid management system pump console, featuring a retention mechanism and angled engagement surfaces for secure positioning and easy ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a disposable fluid cassette is designed for easy ejection, then ease of operation is improved, but retention reliability may worsen
Solution Approach 1:
The retention tab is designed to dynamically change its engagement state based on door position. When the door is closed, the retention tab engages firmly with the retention feature to secure the cassette. When the door is opened, the retention tab disengages or becomes less secure, allowing easy ejection. This dynamic behavior resolves the contradiction between secure retention and easy ejection.
Solution Approach 2:
The system performs preliminary engagement of the retention tab with the retention feature during the insertion process, ensuring the cassette is securely held before use. The ejection mechanism is pre-configured to automatically disengage this retention when the door opens, providing both secure retention during operation and easy ejection when needed.
2Reliability
If the fluid cassette is held securely in the receptacle, then reliability is improved, but ease of removal worsens
Solution Approach 1:
The retention mechanism provides different engagement levels based on operational state. During normal operation with the door closed, the retention tab maintains strong engagement for secure positioning. Upon door opening, the engagement automatically reduces, enabling easy removal without requiring additional force or complex release mechanisms.
Solution Approach 2:
The retention tab automatically adjusts its engagement level in response to door movement. The system self-regulates the retention force without user intervention, maintaining strong holding during operation and automatic release during ejection, thus resolving the contradiction between secure positioning and ease of removal.
3Adaptability or versatility
If alternative configurations of components are provided, then adaptability is improved, but device complexity worsens
Solution Approach 1:
The fluid management system is divided into separate, interchangeable components including the fluid cassette, retention tab, and receptacle. This segmentation allows different configurations and replacements of individual components without affecting the entire system, providing adaptability while maintaining simplicity through modular design.
Solution Approach 2:
The retention tab and receptacle design creates a universal interface that can accommodate different fluid cassette configurations. The standardized engagement mechanism allows various cassette types to be used with the same basic structure, enhancing adaptability without increasing overall device complexity.
Data Source
AI summary
A fluid management system including a console including a controller for operating a pump. The console includes a door movable between a closed position and an open position to access a receptacle. The fluid management system also includes a fluid cassette insertable into the receptacle of the housing of the console. The fluid cassette is positioned in the receptacle in a loaded position in which the housing of the fluid cassette lies in a vertical plane when the door is in the closed position and the housing of the fluid cassette is tilted out of the receptacle in an ejected position when the door is in the open position. The fluid cassette includes a retention tab with a lip extending from the lower edge of the fluid cassette that engages a retention tab and recess of the console to hold the fluid cassette in the ejected position.