Delivered Dose Uniformity (DDU)
SKU : DDU
DDU of Metered-Dose Inhalers (MDIs) DDU of Dry Powder Inhalers (DPIs) DDU of Nebulisers DDU of Soft Mist Inhalers (SMIs) DDU of Nasal Products
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Delivered Dose Uniformity (DDU)
One of the four Critical Quality Attributes (CQAs) that determine the safety, quality and efficacy of orally inhaled and nasal drug products (OINDPs), delivered dose is the total amount of drug emitted from the drug device that is available to the user, when the device is actuated correctly. The Delivered Dose Uniformity, or DDU, must be ensured within and between devices. DDU is measured by firing the test device into a sampling apparatus which contains a filter. The active drug caught on the filter is then dissolved in solvent and analysed using High Pressure Liquid Chromatography (HPLC). Depending on the type of OINDP under test, different apparatus set-ups are required.
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