Centrifugal Compressor Air Pump for Inhaler Drug Delivery
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Solution Overview
Problem
Conventional inhaler devices are ineffective for patients with limited breathing capacity or those who do not inhale deeply enough, leading to improper administration of dry powder drugs, as they rely on patient-generated airflow for optimal drug dispersion and absorption into the lungs.
Innovation Solution
An inhaler with a built-in air pump using a centrifugal compressor turbine that provides sufficient pressure and airflow rate, coupled with a pressure sensor and control circuit to adjust airflow based on patient inhalation, ensuring optimal drug delivery deep into the lungs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inhalers rely on patient-generated airflow, then the device structure remains simple, but patients with limited breathing capacity cannot achieve optimal drug dispersion and lung penetration
Solution Approach 1:
The inhaler uses the patient's own inhalation action to trigger the air pump automatically. The pressure sensor detects the negative pressure generated by patient inhalation and activates the pump accordingly, making the system self-regulating and adaptive to different patient breathing patterns without requiring complex external control mechanisms
Solution Approach 2:
The invention employs a pressure sensor to detect inhalation-induced pressure changes and uses this pneumatic feedback to control the air pump's operation. The system leverages the natural pressure differential created during patient inhalation to trigger drug delivery, eliminating the need for electronic sensors or complex control circuits
2Speed
If the air pump provides high pressure and airflow rate, then deep lung penetration is achieved, but the device becomes more complex and less portable
Solution Approach 1:
The air pump's operating parameters (pressure and flow rate) are dynamically adjusted based on real-time detection of patient inhalation characteristics. The system adapts the pump's performance to match the patient's breathing pattern, providing high airflow rates only when needed during actual inhalation events rather than operating at maximum capacity continuously
Solution Approach 2:
The system changes the operational parameters of the air pump based on detected inhalation depth and duration. By monitoring the duration and intensity of patient inhalation, the control circuit adjusts the pump's pressure and flow rate parameters accordingly, optimizing drug delivery while minimizing energy consumption and device complexity
3Reliability
If the air pump operates continuously, then sufficient drug dispersion is ensured, but energy consumption increases and autonomy decreases
Solution Approach 1:
The air pump operates periodically rather than continuously, being activated only during periods when the pressure sensor detects patient inhalation. This periodic operation pattern ensures drug dispersion occurs synchronously with patient breathing events while dramatically reducing overall energy consumption and extending battery life
Solution Approach 2:
The system uses feedback from the pressure sensor to control the air pump's operation. The sensor continuously monitors inhalation characteristics and provides feedback to the control circuit, which adjusts pump operation accordingly. This closed-loop feedback mechanism ensures the pump operates only when and as much as needed based on actual patient inhalation patterns
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 inhaler ensures effective disaggregation and deep lung penetration of dry powder drugs, even for patients with respiratory difficulties, by generating pressures over 20 millibars and airflow rates over 20 liters per minute, adapting to individual respiratory capabilities for improved drug administration.
Implementation Method 1
The air pump comprises a motor coupled to a centrifugal compressor turbine
Implementation Method 2
the centrifugal compressor turbine allows to provide both sufficient pressure and airflow rate for optimal administration of an inhaled drug deep into a patient's lung
Implementation Method 3
the motor comprises a stator with a plurality of coils mounted on a coil support and a rotor comprising an axis and a permanent magnet core with a plurality of magnetic poles
Data Source
AI summary
Inhaler for oral inhalation administration of a drug, comprising a housing, a drug chamber in the housing, an air pump configured to pump air through the drug chamber for expulsing the drug through an outlet of a mouthpiece, wherein the air pump comprises a motor coupled to a centrifugal compressor operable to pump air through the drug chamber at a pressure greater than 30 millibars and a flow rate greater than 25 litres per minute.