Automatic Drug Inhaler Pressing for Synchronized Delivery
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Solution Overview
Problem
Existing pressurized metered-dose inhalers require precise coordination between hand and mouth for proper drug delivery, which is challenging for children and the elderly, and often result in improper timing of canister pressing, leading to reduced drug deposition and therapy efficacy.
Innovation Solution
An automatic drug delivery device with a drug inhalation action detection unit, flow rate detection, and a motor-driven automatic pressing unit to synchronize canister pressing with inhalation, ensuring accurate and timely drug delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual canister pressing is used, then device simplicity is maintained, but coordination between hand and mouth becomes difficult and drug deposition efficiency decreases
Solution Approach 1:
The patent replaces the manual mechanical pressing operation with an automated motor-driven pressing mechanism. The motor is controlled by a control unit that receives signals from a flow rate sensor, automatically triggering the canister pressing action without requiring manual coordination. This substitution of manual mechanical operation with an automated electromechanical system resolves the contradiction by improving ease of operation while accepting increased device complexity.
Solution Approach 2:
The device performs self-service by automatically detecting the patient's inhalation flow rate and autonomously triggering the canister pressing mechanism. The flow rate sensor continuously monitors inhalation, and when the predetermined flow rate is detected, the control unit automatically activates the motor to press the canister. This eliminates the need for manual intervention and coordination, allowing the device to serve itself in synchronizing drug delivery with patient inhalation.
2Reliability
If canister pressing force is increased to 2-4 kg, then drug delivery reliability improves, but ease of operation for elderly and children deteriorates
Solution Approach 1:
The patent replaces manual finger pressing with a motor-driven pressing mechanism that can reliably generate the required 2-4 kg force. The motor is controlled by a control unit that activates it automatically when inhalation is detected, eliminating the need for users to manually apply sufficient pressing force. This substitution ensures reliable drug delivery while removing the physical strength requirement from the user.
Solution Approach 2:
The device autonomously generates and applies the necessary pressing force through its motor mechanism without requiring user effort. The control unit monitors inhalation flow rate and automatically activates the motor to apply the precise force needed for reliable drug delivery, making the device self-sufficient in meeting the force requirement and eliminating barriers for elderly and children.
3Manufacturing precision
If canister pressing timing is manual, then device complexity is low, but drug deposition precision deteriorates due to premature or delayed pressing
Solution Approach 1:
The patent replaces manual timing judgment with an automated electronic control system. The flow rate sensor continuously monitors inhalation flow rate, and the control unit processes this data to detect when the predetermined flow rate is achieved, automatically triggering the motor to press the canister at the precise moment. This substitution of manual timing with sensor-based electronic control achieves precise pressing timing while accepting increased device complexity.
Solution Approach 2:
The device implements feedback control by continuously monitoring inhalation flow rate through the flow rate sensor and using this information to trigger the canister pressing action. The control unit receives real-time feedback from the sensor about the patient's inhalation status and automatically activates the motor when the optimal timing is detected, ensuring precise synchronization of drug delivery with patient inhalation without manual intervention.
4Loss of time
If automatic flow rate detection is implemented, then pressing timing accuracy improves, but device complexity and cost increase
Solution Approach 1:
The device uses feedback from the flow rate sensor to automatically control the timing of canister pressing. The sensor continuously monitors inhalation flow rate and provides real-time feedback to the control unit, which triggers the motor when the predetermined flow rate is detected. This feedback mechanism achieves precise inhalation timing synchronization without requiring manual coordination, accepting the trade-off of increased device complexity.
Solution Approach 2:
The patent replaces manual timing judgment and coordination with an automated electromechanical system comprising a flow rate sensor, control unit, and motor. This substitution achieves precise timing synchronization by detecting inhalation flow rate and automatically triggering drug delivery, eliminating the time loss associated with manual coordination while accepting increased device complexity.
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
Enhances drug therapy effectiveness and adherence by automating canister pressing, addressing the coordination issues faced by children and the elderly, and improving lung deposition of medication.
Implementation Method 1
The flow rate detection unit is realized by a pressure sensor, and the flow rate detection unit and the main control unit are arranged on the actuator
Data Source
AI summary
The disclosure discloses an automatic drug delivery device for intelligent inhalation medication, including a drug inhaler, a drug inhalation action detection unit, a main control unit and an automatic pressing unit. The drug inhaler is a drug inhaler capable of drug delivery by pressing. The drug inhalation action detection unit is configured to detect whether the drug inhaler is subjected to a drug inhalation action and transmit a drug inhalation action signal to the main control unit. The main control unit is configured to correspondingly drive the automatic pressing unit to press a canister of the drug inhaler for drug delivery according to the received drug inhalation action signal.