Breathing System Extended Gas Pathway for Gas Separation
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Solution Overview
Problem
Existing patient breathing systems, particularly re-breathing systems with carbon dioxide absorption, are complex and costly due to the need for intricate designs and high maintenance demands, which complicates ventilation modes and increases costs, while non-re-breathing systems are un-economical with high fresh gas consumption.
Innovation Solution
The implementation of an extended gas pathway between the circle and the ventilator eliminates the need for a bellows or bag, allowing for a simplified system that can easily switch between non-re-breathing and re-breathing modes, reducing complexity and enabling flexible operation by maintaining an uninterrupted gas flow connection from the gas inlet to the patient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If re-breathing systems with carbon dioxide absorption are used, then fresh gas consumption is reduced, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the bellows component from the breathing system, using an extended gas pathway instead to achieve gas separation. This reduces device complexity while maintaining the re-breathing function that lowers fresh gas consumption.
Solution Approach 2:
The extended gas pathway serves multiple functions: it acts as both the breathing circuit and the gas separation mechanism, replacing the dedicated bellows component. This multi-functionality reduces the number of parts while maintaining re-breathing efficiency.
2Reliability
If bellows are used to separate driving gas from patient gas, then gas separation is achieved, but device complexity and maintenance demands increase
Solution Approach 1:
The bellows component is completely removed from the system. The extended gas pathway alone provides sufficient gas separation between driving gas and patient gas, eliminating the need for mechanical bellows and their associated maintenance requirements.
Solution Approach 2:
The extended gas pathway acts as an intermediary element that provides gas separation without requiring mechanical moving parts. The pathway's volume and configuration create sufficient gas column separation to prevent mixing of driving and patient gases.
3Adaptability or versatility
If complex ventilation modes are implemented, then patient care flexibility improves, but maintenance costs and system complexity increase
Solution Approach 1:
The simplified breathing system design with extended gas pathway provides a universal platform that can support multiple ventilation modes without requiring additional complex components. The system's flexibility comes from the gas flow control capabilities rather than mechanical complexity.
Data Source
AI summary
A patient breathing system includes a ventilator that provides a driving gas flow to generate patient inspiration. The ventilator further includes a gas inlet for driving gas, the patient breathing system being connectable to a circle which includes an inspiratory hose and an expiratory hose connected to patient, through which circle expired gases can be circulated back to the patient. The circle further includes a fresh gas inlet, an arrangement for enabling the gas flow in a desired direction, a unit for removal of the exhaled carbon dioxide, and a ventilator port for the ventilator connection. The patient breathing system further includes an arrangement by which driving gas of the ventilator has been separated from the patient gases flowing in the circle.