Nasal Cannula Separate Flow Paths Prevent Condensation
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Solution Overview
Problem
Respiratory assist devices face challenges in delivering nebulized medications during high-flow therapy due to condensation of moisture from heated and humidified breathing gas, which leads to reduced flow and potential biologic hazards.
Innovation Solution
The system employs separate flow paths and cannula outlets for heated and humidified breathing gas and aerosolized medicament, delaying their mixing until exit, thereby reducing condensation and improving medicament delivery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heated and humidified breathing gas is delivered through a nasal cannula during high-flow therapy, then patient comfort is improved and work of breathing is decreased, but condensation of moisture occurs in the ventilation circuit leading to reduced flow and biologic hazards
Solution Approach 1:
The patent divides the delivery system into separate flow paths: one for heated and humidified breathing gas, and another for aerosolized medicament. This segmentation prevents the mixing of these flows within the cannula, thereby preventing condensation of the heated gas while maintaining patient comfort benefits.
Solution Approach 2:
The patent extracts the aerosolized medicament delivery from the heated gas flow path by using a separate entrance. The medicament is delivered through its own dedicated flow path that merges with the breathing gas only at the very exit, removing the source of condensation problems from the internal circuitry.
2Productivity
If nebulized medication is delivered through a nasal cannula during high-flow therapy, then patients receive medication without stopping respiratory assist device, but condensation of aerosolized medicament occurs due to mixing with heated and humidified breathing gas
Solution Approach 1:
The patent implements separate flow paths for breathing gas and aerosolized medicament throughout the cannula structure. This segmentation allows continuous delivery of medication while preventing premature mixing with heated gas that would cause condensation and loss of medicament.
Solution Approach 2:
The patent uses the separate flow paths as intermediaries that carry the aerosolized medicament and heated breathing gas independently until they meet at the exit. This intermediary structure prevents direct interaction between the two flows within the cannula, avoiding condensation while enabling continuous delivery.
3Productivity
If separate flow paths are used for breathing gas and aerosolized medicament, then condensation is reduced and medicament delivery efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the two separate flow paths (breathing gas and aerosolized medicament) at the very exit of the cannula. This late merging allows the benefits of separate delivery (reduced condensation, improved efficiency) while minimizing the complexity burden by having the paths converge at a single point rather than requiring completely separate outlet structures.
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
This approach enhances medicament delivery by preventing condensation, reducing waste, and maintaining patient comfort by keeping the medicament warmer, thus increasing the effectiveness and safety of respiratory therapy.
Implementation Method 1
A challenge associated with delivering nebulized medication via a high-flow system is the condensation of moisture from the mixture of heated and humidified breathing gas and nebulized medication.
Implementation Method 2
The heated and humidified breathing gas may mix with the aerosolized medicament within the nares of a patient or proximal to the nares of a patient after exiting the cannula.
Implementation Method 3
By delaying the mixing of the flows, these systems, methods, and devices prevent a drop in the temperature of the heated and humidified breathing gas as the heated and humidified breathing gas flows through the respiratory therapy system.
Implementation Method 4
Since nebulized medicament tends to condense together with condensed moisture in the heated and humidified breathing gas, preventing the condensation in the breathing gas also prevents condensation and subsequent waste of the nebulized medicament.
Data Source
AI summary
Systems, devices, and methods are disclosed for nasal cannulas allowing simultaneous flow of humidified breathing gas and aerosolized medicament for use in respiratory therapy. Utilizing separate flow paths and separate cannula outlets for the heated and humidified breathing gas and for the aerosolized medicament, these systems, methods, and devices reduce condensation of the aerosolized medicament by delaying mixing of the flow of aerosolized medicament and the flow of heated and humidified breathing gas until the flows exit the cannula.