Pulmonary Ventilator Dual-Path Exhaust Filter
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Solution Overview
Problem
Current pulmonary ventilator systems interrupt ventilation therapy when filters need to be changed, leading to loss of Functional Residual Capacity (FRC) and potential contamination of the environment with pathogens.
Innovation Solution
A pulmonary ventilator system with a dual-path exhaust filtration structure that allows for filter change without interrupting ventilation, using a bypass mechanism to direct exhaust gas through two filters sequentially, ensuring continuous filtration and minimizing the release of unfiltered exhaust gas into the environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single filter is used in the exhaust circuit, then the structure is simple, but the filter must be changed by breaking the circuit which interrupts ventilation therapy
Solution Approach 1:
The exhaust circuit is segmented into multiple paths (first path with first filter, second path with second filter) allowing independent operation of each filter. This segmentation enables one filter to be changed while the other continues to filter exhaust gas, maintaining ventilation continuity without requiring complete circuit interruption.
Solution Approach 2:
The dual-path filtration system ensures continuous useful action by maintaining exhaust gas filtration throughout the filter change process. While one filter is being replaced, the other filter remains active, ensuring that exhaust gas continues to be filtered and preventing interruption of ventilation therapy.
2Ease of repair
If the filter is changed by breaking the exhaust circuit, then the filter can be replaced, but unfiltered exhaust gas is vented into the environment
Solution Approach 1:
The system maintains continuous filtration during filter replacement by switching to the second path with the second filter when the first filter needs changing. This ensures that exhaust gas continues to be filtered throughout the entire replacement process, preventing any release of unfiltered exhaust gas containing pathogens into the environment.
Solution Approach 2:
The second filter acts as an intermediary during the replacement of the first filter. When the first filter needs to be changed, the system switches to using the second filter as the active filtration barrier, preventing direct exposure of unfiltered exhaust gas to the environment during the transition period.
3Ease of operation
If filter change requires circuit interruption, then the filter can be accessed for replacement, but Functional Residual Capacity is lost
Solution Approach 1:
The exhaust circuit is divided into separate segments (first path and second path) with independent filters. This segmentation allows one filter to be accessed and replaced without interrupting the overall ventilation circuit, as the other filter continues to maintain exhaust gas filtration and circuit integrity.
Solution Approach 2:
The dual-path system ensures continuous ventilation therapy by maintaining active filtration through the second filter while the first filter is being replaced. This continuity prevents loss of Functional Residual Capacity that would occur with complete circuit interruption, as the ventilation system remains operational throughout the filter change process.
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 uninterrupted ventilation therapy during filter changes, maintaining Functional Residual Capacity and reducing the risk of pathogen contamination in the environment by allowing continuous filtration and immediate filter swapping without venting unfiltered exhaust gas.
Implementation Method 1
a first filter configured to be in a first path and removable from the first path, the first filter to remove pathogens from the exhaust gas with pathogens from the patient to form first filtered exhaust gas
Implementation Method 2
a valve operable between a first position and a second position. In the first position, the valve directs the exhaust gas with pathogens to the first filter. In the second position, the valve directs the exhaust gas with pathogens to the second filter
Data Source
AI summary
In a pulmonary ventilation system, a filter arrangement useful as an input filter arrangement and an output filter arrangement is constructed to allow for changing or cleaning of the filter without interrupting or impacting the ventilation therapy and to limit the release of pathogens to the surrounding area or atmosphere. A preferred exhaust filter is constructed to function as a water trap and filter. Methods of operating the pulmonary ventilation system are also disclosed along with kits containing materials to construct an input or an output filtration structure.