Aerosol Medication Delivery System with External Generator
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Solution Overview
Problem
Existing systems for delivering aerosolized medication to patients are inefficient and potentially unsafe, especially for newborns, as they often dilute the medication with breathing gas and can cause airway tissue injury with multi-lumen catheters.
Innovation Solution
A system that aerosolizes medication outside the patient's airway, using a generator and carrier gas to deliver aerosolized medication directly into the airway through a tube positioned in the oropharyngeal cavity or endotracheal tube, with a patient interface like a pacifier to ensure accurate placement and prevent tissue injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If medication is aerosolized outside the airway and mixed with breathing gas, then the medication can be delivered to the patient, but the medication becomes diluted and delivery efficiency decreases
Solution Approach 1:
The system separates the aerosol generation chamber from the patient airway, creating distinct zones for medication aerosolization and delivery. The aerosol is generated in a controlled environment outside the airway and then transported through a dedicated delivery tube, preventing dilution with breathing gas while ensuring efficient delivery to the target location.
Solution Approach 2:
A carrier gas is introduced as an intermediary substance to transport the aerosolized medication from the generation chamber to the patient airway. This carrier gas creates a controlled flow that maintains medication concentration during transport without allowing premature mixing with the patient's breathing gas.
2Productivity
If a multi-lumen cannula is used to aerosolize medication in the patient's airway, then direct delivery is achieved, but airway tissue injury risk increases
Solution Approach 1:
The aerosol generation process is extracted from the patient's airway environment and performed externally in a separate chamber. This eliminates direct contact between the aerosolization mechanism and the patient's airway tissue, removing the source of potential injury while maintaining effective medication delivery through the external-to-internal transport system.
Solution Approach 2:
The delivery tube serves as an intermediary conduit that transports the aerosolized medication from the external generation chamber to the patient airway without requiring direct insertion of aerosolization equipment into the airway. This intermediate transport mechanism protects vulnerable airway tissue from mechanical injury.
3Productivity
If the aerosol delivery tube is positioned in the oropharyngeal cavity, then direct airway delivery is achieved, but proper positioning becomes difficult to ensure
Solution Approach 1:
The system replaces complex mechanical positioning mechanisms with a simplified patient interface device that uses anatomical landmarks and geometric constraints to ensure proper tube positioning. The interface device leverages the natural anatomy of the oropharyngeal cavity to guide the delivery tube to the correct location without requiring complex adjustment mechanisms.
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 method improves efficiency and safety by ensuring the medication is not diluted and allows control over aerosol particle size, reducing the risk of airway tissue injury, and is suitable for patients requiring supplemental oxygen and positive pressure breathing assistance.
Implementation Method 1
an aerosol generator (sometimes referred to merely as 'generator') for aerosolizing medication
Implementation Method 2
providing a flow of carrier gas; using the carrier gas, conveying the aerosolized medication via an aerosol delivery tube
Data Source
AI summary
Systems and methods are disclosed for delivering medication to a patient. One such system has an aerosol generator for aerosolizing medication. The generator is located outside the airway of a patient. A chamber is provided for receiving aerosolized medication from the generator. The system has a carrier gas supply tube for delivering carrier gas to the chamber, and an aerosol delivery tube for receiving the aerosolized medication and the carrier gas from the chamber. The aerosol delivery tube delivers the aerosolized medication to the patient. A distal end of the aerosol delivery tube is positioned inside the airway of the patient in order to discharge the aerosolized medication within the patient's airway.