Bladder Evacuation System with Movable Screen
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Solution Overview
Problem
Existing bladder evacuation systems are cumbersome for left-handed surgeons and rely on hand strength to control fluid dispensing, leading to inconsistencies in irrigation and aspiration.
Innovation Solution
A bladder evacuation system with a housing, inlet, exit port, and a screen that moves between positions to filter particulate matter, using a piston or syringe mechanism for fluid delivery and aspiration, allowing for easy use by either hand and precise fluid control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a pump bulb is used for irrigation and aspiration, then fluid can be dispensed, but the amount of fluid dispensed varies depending on hand strength
Solution Approach 1:
The manual pump bulb mechanism is replaced with a syringe-based system that allows for more precise and consistent control of fluid dispensing through a plunger mechanism, eliminating the variability introduced by hand strength differences
Solution Approach 2:
The system allows adjustment of fluid dispensing parameters through the syringe plunger movement, enabling consistent control of irrigation and aspiration rates independent of user hand strength
2Reliability
If a screen is added to filter particulate matter, then particulate matter can be collected, but the system complexity increases
Solution Approach 1:
The screen is integrated into the existing syringe and housing structure, combining the filtration function with the fluid delivery system rather than adding a completely separate filtration device
Solution Approach 2:
The screen acts as an intermediary component between the fluid path and the collection container, enabling particulate matter separation through a simple mesh structure that fits within the existing system geometry
3Reliability
If the screen is always in the flow path, then particulate matter is filtered, but fluid flow resistance increases during irrigation
Solution Approach 1:
The screen is designed to be movable rather than fixed, allowing it to shift position based on fluid flow direction - moving out of the way during irrigation to minimize resistance and into position during aspiration to enable filtration
Solution Approach 2:
The screen periodically moves between two positions - one for irrigation flow and another for aspiration filtration - synchronized with the alternating irrigation/aspiration cycles of the procedure
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 system enables efficient and precise irrigation and aspiration of bladders, filtering particulate matter and allowing for use by both left- and right-handed surgeons, with a spring-assisted screen ensuring effective particulate collection and fluid management.
Implementation Method 1
The system employs a spring that is mounted in the housing for biasing the screen from the first position into the second position
Implementation Method 2
the means for expelling/drawing fluid includes a piston reciprocally mounted in the cylinder
Implementation Method 3
a screen is mounted in the cavity of the housing to screen out particulate matter from the return flow of fluid
Implementation Method 4
allowing the particulate material collected thereon to fall under gravity into the container
Data Source
AI summary
The evacuation system employs a piston to deliver fluid for irrigating and aspirating a body cavity, such as a bladder. A pivotal screen is disposed across the flow path of the fluid to move out of the fluid flow path during irrigation of the bladder and to move back into the flow path during aspiration of the bladder. The screen screens out particulate matter from the return flow for depositing into the container of the system.