Core Viewpoint - The article emphasizes the importance of understanding two key standards when selecting nebulizers to ensure effective treatment and avoid misleading parameters [1] Group 1: Key Standards - The ISO27427 standard is highlighted as an international requirement for medical devices, ensuring that nebulizer parameters are reliable and reflective of real-life usage scenarios [3] - This standard uses a realistic testing method that simulates human respiratory conditions, providing parameters that can be trusted for actual treatment [3] - The old standard, based on laser diffraction, often presents idealized data that does not accurately reflect real-world usage, leading to potentially misleading conclusions [5] Group 2: Parameter Comparison - Parameters under the ISO27427 standard, such as the inhalable ratio, are derived from realistic breathing simulations, making them more applicable to actual treatment situations [7] - The RDDR (Respiratory Drug Delivery Rate) is a critical efficiency parameter mandated by the ISO27427 standard, calculated from nebulizer output rate and inhalable ratio, providing a clearer picture of effective drug delivery [7] - For example, the German PARI BOY Classic achieves an RDDR of 99μl/min under the ISO27427 standard, indicating a high efficiency in delivering medication to the lungs [8] Group 3: Practical Guidance - When selecting a nebulizer, it is crucial to prioritize the standard used for testing, with a focus on the ISO27427 standard for more accurate and reliable parameters [10] - The article advises consumers to avoid being misled by attractive but potentially misleading parameters and to ensure that the chosen nebulizer meets the necessary standards for effective treatment [10]