Endoscopic Fluid Management System Footswitch Control Logic
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Solution Overview
Problem
Existing fluid management systems for endoscopic procedures lack a mechanism to prevent sudden changes in operational parameters, such as flow rate, which can cause harm to patients or damage equipment.
Innovation Solution
A fluid management system with a central processing unit (CPU) that disables preset controls on the user input device when the footswitch is engaged, allowing only incremental changes to operational parameters, thereby preventing sudden changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If preset controls are enabled during footswitch operation, then the user can quickly switch between predetermined pump levels, but sudden changes in operational parameters may occur causing harm to the patient or damage to equipment
Solution Approach 1:
The system dynamically changes the functionality of controls based on the operational state. When the footswitch is engaged, preset controls are disabled while increment controls remain enabled, allowing gradual parameter adjustment. This dynamic reconfiguration resolves the contradiction by adapting control availability to the current operational context.
Solution Approach 2:
The CPU acts as an intermediary that mediates between the user's control inputs and the pump operation. It monitors footswitch state and selectively enables or disables control functions, preventing direct sudden changes while maintaining operational control through incremental adjustments.
2Adaptability or versatility
If all user input controls remain enabled during pump operation, then the user has full control over pump parameters, but the risk of accidental sudden changes increases
Solution Approach 1:
Different control functions are assigned different accessibility qualities based on the operational state. Increment controls maintain full accessibility during operation for safe gradual adjustments, while preset controls become inaccessible during footswitch engagement to prevent accidental sudden changes. This local differentiation of control accessibility resolves the contradiction between versatility and reliability.
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 effectively prevents sudden alterations in operational parameters during endoscopic procedures, ensuring patient safety and equipment integrity by allowing only gradual changes while the pump is in operation.
Implementation Method 1
the pump comprises a peristaltic pump and the operational parameter is at least one of pump speed or flowrate
Data Source
Figure 1~2
AI summary
A fluid management system (10) for an endoscopic procedure comprises a pump (12) configured to deliver liquid from a reservoir (22) to a medical device (16). The pump (12) comprises a central processing unit (CPU) (24) to control operation of the pump, a footswitch (14) to actuate the pump and a user input device (26) to program the CPU (24) to operate the pump at a plurality of predetermined levels of an operational parameter and to allow a user to select one of the plurality of predetermined levels for pump operation. The CPU (24) is configured to disable to at least parts of the user input device (26) when the footswitch (14) is engaged. This prevents sudden changes in an operational parameter of the pump during use, such as the flow rate of irrigation fluid, to prevent potential harm to a patient or damage to the equipment.