Vortex holding chamber is a "spacer" to be used with metered dose inhalers.I received a brand new one today in sealed packaging.The "duckbill" valve in the device is one-way to allow air passage during the inhalation phase of use.This valve was stuck shut so no medication could be inhaled.I had to take the device mouthpiece apart to physically separate the leaves on the valve to make it work.I suffered no injury, but a patient trying to use a similarly defective device could be seriously harmed, especially if the inhaled drug is intended to open airways in asthma.
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