Fluid Cassette Pump Control for Stable Endoscopic Irrigation Pressure
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Solution Overview
Problem
Existing fluid management systems for flexible ureteroscopy and endoscopic procedures lack the ability to consistently and predictably control fluid flowrate and intraluminal pressure, leading to potential adverse events such as tissue rupture or working space collapse.
Innovation Solution
A fluid management system with a controller that adjusts the speeds of inflow and outflow pumps based on user input settings, including fluid flowrate, intraluminal pressure, flush mode, and distension mode, allowing direct control of fluid flow and pressure to maintain optimal conditions during medical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fluid management systems use gravity delivery or manual injection methods, then device complexity is reduced, but fluid flowrate and pressure control precision deteriorates
Solution Approach 1:
The patent replaces manual mechanical injection methods with an automated peristaltic pump system that uses controlled mechanical compression of tubing to deliver fluid. This substitution enables precise electronic control of flowrate and pressure while maintaining manageable system complexity through standardized pump components and controller integration.
Solution Approach 2:
The system enables dynamic adjustment of fluid delivery parameters (flowrate and pressure) by varying the pump speed and compression force. The controller can modify operational parameters in real-time based on procedural needs, achieving precise control without requiring complex mechanical adjustment mechanisms.
2Device complexity
If fluid management systems use fixed pressure delivery, then device complexity is reduced, but adaptability to different procedural needs deteriorates
Solution Approach 1:
The patent implements a dynamic fluid delivery system where the peristaltic pump can continuously adjust its speed and compression force during the procedure. This dynamic control allows the system to adapt to varying procedural requirements (such as different irrigation needs during endoscopy) while using a single standardized pump device, avoiding the need for multiple fixed-pressure systems.
Solution Approach 2:
The peristaltic pump system is designed to perform multiple fluid delivery functions (irrigation, aspiration, pressure control) through a single device. The controller can switch between different delivery modes and adjust parameters to suit various procedural stages, making the system universally applicable across different endoscopic procedures without requiring separate specialized equipment.
3Device complexity
If fluid management systems lack intraluminal pressure control, then device complexity is reduced, but reliability of procedural safety deteriorates
Solution Approach 1:
The system incorporates pressure sensing capability that provides feedback to the controller about intraluminal pressure conditions. The controller uses this feedback to automatically adjust pump operation and maintain pressure within safe limits, ensuring procedural safety through closed-loop control while adding only minimal complexity through standard sensor and controller integration.
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
Enables precise regulation of fluid flowrate and intraluminal pressure, reducing the risk of adverse events and ensuring consistent procedural efficacy by allowing clinicians to set desired flowrate and pressure settings.
Implementation Method 1
a peristaltic pump to deliver fluid from a reservoir at a fixed pressure or flowrate
Data Source
AI summary
A fluid management system including a fluid management console, an outflow pump configured to provide a flow of fluid from a medical device, and a fluid cassette configured to be received within the fluid management console. The console may comprise a housing, a controller housed within the housing, an inflow pump disposed within the housing, and a user input interface. The fluid cassette is configured to be received within a receptacle of the housing of the fluid management console and to provide a flow of fluid to a medical device. The controller of the fluid management console may be configured to adjust a speed of the inflow pump and/or the outflow pump to provide the flow of fluid to the medical device based on one or more control settings including at least a fluid flowrate setting received at the user input interface.