Anaesthesia Ventilator NO Injection Layout for Circuit Integrity
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Solution Overview
Problem
Connecting the gas sampling module and flow sensor to an NO delivery apparatus is difficult in a basic patient circuit associated with an anesthesia ventilator, particularly during surgical operations, as existing connections require unsealing or cutting the patient circuit, which is impractical and disruptive.
Innovation Solution
A configuration where the flow rate measurement device is connected directly to the anesthesia ventilator's gas outlet, with the NO injection device downstream, and the gas sampling module arranged at a distance of at least 30 cm from the injection device, using intermediate conduits and connectors to facilitate connection without disrupting the patient circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gas sampling module and flow sensor are connected to the NO delivery apparatus using conventional connection methods, then the NO delivery function can be implemented, but the patient circuit must be unsealed or cut, which disrupts the surgical environment and compromises circuit integrity
Solution Approach 1:
The patent introduces an intermediary connection system comprising a first connection element on the NO delivery apparatus and a second connection element on the patient circuit that can be connected without unsealing or cutting the circuit. This intermediary mechanism allows the gas sampling module and flow sensor to be integrated into the patient circuit while maintaining circuit integrity and avoiding disruption to the surgical environment.
2Measurement precision
If the gas sampling module is positioned close to the NO injection device, then sampling accuracy is improved, but the risk of contamination and measurement error increases due to the basic patient circuit configuration
Solution Approach 1:
The patent positions the gas sampling module at a distance of at least 30 cm from the NO injection device along the patient circuit, utilizing the spatial dimension to resolve the contradiction. This distance ensures that the sampling module is sufficiently far from potential contamination sources while still allowing accurate measurement of the gas mixture composition, thereby reducing measurement errors and contamination risks.
3Adaptability or versatility
If the patient circuit is modified to accommodate the NO delivery apparatus, then NO administration can be implemented, but the complexity of the circuit increases and surgical operations become more difficult
Solution Approach 1:
The patent designs the connection system with universal connection elements that can be integrated into existing basic patient circuits without requiring modifications. The first and second connection elements are designed to work with standard circuit configurations, allowing NO delivery functionality to be added while maintaining circuit simplicity and avoiding increased complexity that would interfere with surgical operations.
Data Source
AI summary
The invention relates to an installation (100) for supplying a gas mixture containing NO to a patient, comprising an NO delivery apparatus (1) and a medical ventilator (50), an NO injection device (24), a flow rate measurement device (25) and a gas sampling module (61). The medical ventilator (50) is an anaesthesia ventilator (150) comprising a gas outlet (151) to which the flow rate measurement device (25) is connected. The NO injection device (24) is arranged downstream of the flow rate measurement device (25), and the gas sampling module (61) is arranged downstream of the NO injection device (24), at a distance (D) of at least 30 cm.