Stair-Step Dosing Indicators for Faster, Accurate Medicine Dispensing
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Solution Overview
Problem
Existing drug administration systems, particularly in emergency and critical care situations, are prone to errors due to the complexity of dosage determination and the multitude of steps involved, leading to inaccuracies especially for pediatric patients.
Innovation Solution
A medicine dispensing device with color-coded, stair-step dosing indicators that correlate patient characteristics to specific medication doses, reducing the number of steps and minimizing errors by providing pre-marked dosing information directly on the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional weight-based dosing systems are used, then drug dosages can be determined, but the process involves multi-step mathematical calculations that increase the potential for errors
Solution Approach 1:
The dosing system is segmented into distinct height-based ranges (e.g., 0-50cm, 50-100cm, 100-150cm) with each range corresponding to specific dosing instructions. This segmentation eliminates complex calculations by dividing the continuous variable of patient size into discrete, manageable categories that directly map to dosing protocols.
Solution Approach 2:
Dosing instructions are pre-calculated and pre-marked on the device based on patient height ranges. The system performs the mathematical calculations in advance during device manufacturing, so that during actual use, the practitioner simply needs to measure patient height and follow the pre-determined dosing guidelines without performing any calculations.
2Ease of operation
If constant incremental change in dosages is used, then dosing systems can be simplified, but this results in loss of needed dosing accuracy
Solution Approach 1:
The dosing system applies different dosing increments and intervals to different patient height ranges. Instead of a uniform constant increment, each height category (e.g., pediatric vs. adult ranges) has locally optimized dosing values that maintain both simplicity and accuracy for that specific patient population.
Solution Approach 2:
The system changes the dosing parameters (increment values, concentration factors) based on the patient height range being treated. By adjusting these parameters according to the specific clinical scenario and patient size category, the system maintains accuracy across different patient populations while keeping the overall system simple to use.
3Reliability
If multiple calculation steps are required to determine correct dose, then dosing can be based on patient characteristics, but each step introduces potential for error and slows down the process
Solution Approach 1:
All dosing calculations are performed in advance during device manufacturing. The device is pre-marked with dosing instructions specific to each patient height range, so that during emergency or routine administration, the practitioner only needs to measure patient height and follow the pre-determined guidelines, eliminating time-consuming calculation steps while maintaining dosing correctness.
Solution Approach 2:
The dosing device serves itself by having built-in pre-calculated dosing information. The device automatically provides the correct dosing instructions based on the patient height measurement, without requiring the practitioner to perform separate calculation steps. The device self-contained nature integrates both the calculation capability and the dosing guidance into a single tool.
Data Source
Figure 1A
Figure 1B
Figure 1C~1D
AI summary
A medicine dispensing device, configured to contain a liquid medicine to be dispensed by the medicine dispensing device and having a plurality of dosing indicia spaced apart from each other around and in relation to a circumference of a surface of the medicine dispensing device, each dosing indicia being of a different height relative to a reference level and corresponding to different dose of the liquid medicine.