Jet Pump Patient Interface for Respiratory Therapy
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Solution Overview
Problem
Conventional respiratory therapy systems face challenges in delivering medication effectively due to medication 'knock down' issues, where medication builds up within the device, reducing the amount delivered to the patient.
Innovation Solution
A patient interface assembly with a housing, inlet, and outlet ports, incorporating a jet pump and nebulizer, which receives pressurized gas flow from a driver unit to deliver medicated gas to the patient, minimizing medication buildup and enhancing delivery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional patient interface circuits are used to deliver medicated gas, then the system structure is simple, but medication builds up within the device reducing delivery effectiveness
Solution Approach 1:
The nebulizer is extracted from the patient interface circuit and positioned downstream, separate from the main device. This extraction prevents medication buildup within the patient interface device while maintaining effective medication delivery to the patient through the breathing circuit.
Solution Approach 2:
Pressurized gas acts as an intermediary medium to transport aerosolized medication from the nebulizer through the breathing circuit to the patient. The jet pump generates this pressurized gas flow that carries the medication without the medication contacting and building up in the patient interface device components.
2Adaptability or versatility
If the nebulizer is positioned within the patient interface device, then the system is more integrated, but medication builds up and reduces delivery to patient
Solution Approach 1:
The system is segmented into distinct functional modules: the jet pump module, the patient interface device, and the nebulizer positioned downstream. This segmentation allows the nebulizer to be separated from the patient interface device, preventing medication buildup while maintaining system functionality through coordinated operation of the separated components.
3Speed
If pressurized gas flow is used to deliver medication, then delivery speed increases, but medication may build up in the device
Solution Approach 1:
The nebulizer is taken out from the patient interface device and positioned downstream where high-speed pressurized gas flow can transport medication directly to the patient without the medication contacting and building up in the patient interface device components.
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
The solution ensures improved delivery of medication by reducing medication knock down, allowing for higher respirable mass of aerosolized medication to reach the patient, with the nebulizer positioned downstream of the patient interface device to prevent aerosol knock-down, resulting in more effective respiratory therapy.
Implementation Method 1
A jet pump disposed within the housing receives pressurized gas flow from the inlet port and delivers the pressurized gas flow to the outlet port
Implementation Method 2
A nebulizer is fluidly coupled to the outlet port to receive pressurized gas flow, introduce medication into the gas flow and deliver medicated gas flow to the patient
Data Source
AI summary
A patient interface assembly includes a housing that defines an inlet port and an outlet port. A jet pump receives pressurized gas flow from the inlet port and delivers the gas flow to the outlet port. A nebulizer is fluidly coupled to the outlet port and positioned to introduce medication into the gas flow and deliver medicated gas flow to a patient.