Insufflation System Valve Gas Switching
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Solution Overview
Problem
Insufflation systems waste expensive carbon dioxide gas due to continuous flow through valves during standby modes, leading to inefficiency and increased costs in medical procedures.
Innovation Solution
An insufflation system with a pressure sensor and a second switch-over valve that switches between insufflation gas and air, using ambient air during standby modes and insufflation gas only during procedures, to minimize gas loss and optimize gas usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insufflation gas flows continuously through the valve during standby mode, then the system maintains readiness for immediate use, but expensive insufflation gas is wasted continuously
Solution Approach 1:
The system performs preliminary action by switching to air supply mode before actual insufflation procedures begin. The standby mode uses air instead of insufflation gas, preparing the system for immediate use while conserving expensive gas. The pressure sensor detects when the valve is in standby position and automatically switches the gas source to air.
Solution Approach 2:
The system changes the parameter of gas type based on operational state. During standby, the gas type parameter is set to air; during active insufflation, it switches to medical-grade CO2. This parameter change is controlled by the pressure sensor monitoring the valve position and the control unit adjusting the gas source accordingly.
2Loss of substance
If a pressure sensor and control unit are added to detect valve states and switch between gas sources, then gas waste is reduced, but device complexity increases
Solution Approach 1:
The pressure sensor provides continuous feedback about the valve's switching state to the control unit. This feedback mechanism allows the system to automatically adjust the gas source without manual intervention. The control unit receives pressure signals, interprets the valve state, and switches between air and insufflation gas sources accordingly, creating a closed-loop control system.
Solution Approach 2:
The system performs self-service by automatically detecting its own operational state through the pressure sensor and autonomously switching gas sources without requiring external control. The control unit monitors pressure changes caused by valve positioning and independently manages the gas supply, reducing the need for manual operation and simplifying user interaction.
Data Source
AI summary
An insufflation system has a medical instrument, which has a channel through which an insufflation gas can be passed from the proximal end to the distal end. A first valve in the instrument can be switched between a first switching state and a second switching state. It is proposed that a pressure sensor be provided which is connected to the channel and which can detect the two switching states of the first valve. A second switch-over valve can be switched by a control unit in accordance with the detected pressure values, such that the instrument can be connected by the second switch-over valve either to a source of insufflation gas or to a source of air. The second switch-over valve is designed such that only air is delivered in the first switching state of the first valve and only insufflation gas is delivered in the second switching state.