Dry Powder Inhaler Manifold for Consistent Dose Entrainment
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Solution Overview
Problem
Existing dry powder inhalers lack optimal control over air flow and medicament entrainment, leading to inconsistent medicament delivery and potential wastage.
Innovation Solution
A manifold component design with independent and adjustable air flow paths, including a primary and auxiliary air delivery conduit, and optimized medicament inlet and outlet positions, to enhance airflow control and medicament entrainment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single air flow path is used in existing dry powder inhalers, then the device structure is simple, but the control over air flow and medicament entrainment is insufficient leading to inconsistent delivery
Solution Approach 1:
The air flow path is segmented into multiple independent channels (first air flow channel, second air flow channel, third air flow channel) within the manifold component. Each channel can be independently controlled to regulate air flow rates and patterns, enabling precise control over medicament entrainment and delivery consistency without requiring complete structural redesign
Solution Approach 2:
The manifold component incorporates adjustable air flow control mechanisms (such as adjustable openings or variable resistance elements) that allow dynamic regulation of air flow characteristics during inhalation. This enables the system to adapt air flow rates to match user inhalation patterns, improving medicament delivery reliability while maintaining operational simplicity
2Loss of substance
If air flow is not optimally controlled, then the device operation is simple, but medicament wastage increases due to inconsistent entrainment
Solution Approach 1:
The multi-channel air flow control system provides feedback mechanisms that monitor and adjust air flow rates based on inhalation characteristics. By comparing actual air flow with optimal delivery parameters, the system automatically regulates flow distribution across channels to ensure complete medicament entrainment and minimize wastage
Solution Approach 2:
The system enables independent adjustment of multiple air flow parameters (flow rate, velocity, distribution pattern) through the separate channels. By optimizing these parameters to match medicament properties and user inhalation profiles, the system maximizes entrainment efficiency and minimizes medicament loss while avoiding overly complex control 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 design ensures consistent medicament delivery, minimizes wastage, and improves the entrainment of medicament by adjusting airflow independently, resulting in more efficient and reliable inhaler performance.
Implementation Method 1
the Venturi effect provides for a low pressure region adjacent to the medicament inlet opening for drawing the medicament from the opened blister pocket into the medicament delivery conduit
Implementation Method 2
the drawn in medicament is then entrained by the air flowing through the medicament delivery conduit from the air inlet opening to the medicament outlet opening
Data Source
AI summary
Dry powder inhalers deliver medicament from a blister pack having a plurality of spaced-apart blister pockets containing doses of medicament. A housing accommodates unused and used portions of the blister pack together with a dispensing mechanism for selectively opening the blister pockets. A manifold component, through which air is drawn in use, has primary air inlet opening receives first external air and fluidly connected by primary air delivery conduit formed in the manifold component to air outlet opening providing external air from the primary air inlet opening into an opened blister pocket; medicament inlet opening receives air-entrained medicament from the opened blister pocket and is fluidly connected by medicament delivery conduit formed in the manifold component to medicament outlet opening that delivers air-entrained medicament from the opened blister pocket to the user. Air outlet opening and medicament inlet opening are arranged side-by-side to simultaneous communication with the opened blister pocket.