Inhalation Evaluation System for Patient-Specific Flow Analysis
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Solution Overview
Problem
Current inhalation administration devices lack the ability to accurately evaluate the effective inhalation flow and volume of patients, particularly for those with severe airway obstruction or frailty, leading to inefficient drug delivery and waste.
Innovation Solution
A system comprising a flow detector and intelligent terminal that measures and analyzes the inspiration flow-time curve to determine effective inspiration volume, duration, and other parameters, allowing for the evaluation of inhalation administration and selection of appropriate devices based on patient-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high inspiration flow is used to overcome device resistance, then drug particles can be effectively released and inhaled, but patients with severe airway obstruction or frailty cannot achieve the required flow, leading to ineffective drug delivery
Solution Approach 1:
The system dynamically adjusts the resistance simulation based on the specific inhalation administration device being evaluated. The flow detector adapts its measurement parameters and resistance settings to match different device characteristics, allowing accurate evaluation across various device types while maintaining appropriate flow requirements for each.
Solution Approach 2:
The system changes evaluation parameters (flow thresholds, resistance levels, time constants) based on the specific inhalation device and patient condition. By adjusting these parameters, the system can evaluate both high-flow devices like DPIs and lower-flow devices like pMDIs, accommodating different patient capabilities while maintaining evaluation accuracy.
2Device complexity
If peak inspiration flow is only measured, then the evaluation is simple, but it cannot assess the duration and volume of effective inspiration, leading to inaccurate evaluation of actual drug inhalation
Solution Approach 1:
The inspiration flow-time curve is segmented into multiple evaluation parameters including peak flow, duration, volume, and area under the curve. Each parameter provides a different aspect of inhalation effectiveness, allowing comprehensive evaluation while maintaining systematic and manageable measurement processes.
Solution Approach 2:
The system transitions from single-point peak flow measurement to multi-dimensional evaluation by incorporating time as an additional dimension. This creates a flow-time curve that captures not just the maximum flow but also its duration, volume, and temporal distribution, providing a more complete picture of inhalation effectiveness.
3Manufacturing precision
If high internal resistance is designed in inhalation administration devices, then drug particles can be better controlled and delivered, but patients with severe airway obstruction cannot overcome the resistance, reducing treatment effectiveness
Solution Approach 1:
The resistance of the inhalation administration device is dynamically matched to patient capability. The system evaluates the actual flow achieved by the patient and determines whether the device resistance is appropriate, allowing selection or modification of devices with resistance levels suitable for each patient's respiratory capacity.
Solution Approach 2:
The system adjusts resistance parameters based on patient evaluation results. By changing resistance levels to match patient capability, the system optimizes both drug particle control and patient ability to inhale effectively, resolving the contradiction between precise drug delivery and patient accessibility.
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 system provides a quantitative assessment of inhalation administration, ensuring effective drug delivery and reducing waste by matching patients with suitable inhalation devices, thereby improving treatment efficacy.
Implementation Method 1
using a flow detector and an inhalation administration device to be evaluated or a corresponding simulator to perform measurement according to inspiration requirements for the inhalation administration device, to obtain data of an inspiration flow-time curve (F-T)
Implementation Method 2
calculating an effective inspiration volume Veffective based on the inspiration flow-time curve and a series of time parameters ti1 and ti2 obtained
Data Source
AI summary
A method for evaluating inhalation administration and a system for evaluating inhalation administration, the system including a flow detector and an intelligent terminal. The method includes the following steps: 1) obtaining patient-related data of an inspiration flow-time curve; 2) according to an inspiration flow parameter of inhalation administration, obtaining a start time and an end time of each effective inspiration flow section on the inspiration flow-time curve; and 3) calculating an effective inspiration volume Veffective based on the inspiration flow-time curve and a series of time parameters ti1 and ti2 obtained. The method for evaluating inhalation administration and the system for evaluating inhalation administration provide a basis for medical workers to select an appropriate inhalation administration device for patients.